Kyushu University Academic Staff Educational and Research Activities Database
List of Papers
Takeo Yamakawa Last modified date:2019.07.26

Associate Professor / Molecular Biosciences / Department of Bioscience and Biotechnology / Faculty of Agriculture


Papers
1. Aung Zaw Htwe, Seinn Moh Moh, Kyi Moe, Takeo Yamakawa, Biofertilizer production for agronomic application and evaluation of its symbiotic effectiveness in soybeans, Agronomy, 10.3390/agronomy9040162, 9, 4, 2019.03, This study was conducted to evaluate the effects of Bradyrhizobium japonicum SAY3-7, Bradyrhizobium elkanii BLY3-8, and Streptomyces griseoflavus P4 on the symbiotic effectiveness of soybeans before biofertilizer production, to produce biofertilizer containing the studied three strains (SAY3-7, BLY3-8, and P4), to test the effectiveness of the biofertilizer on soybean varieties, and to assess the varietal effects and interaction effects between variety and biofertilizer on plant growth, nodulation, nitrogen fixation, nutrient absorption, and seed yield. Nitrogen fixation was measured using the acetylene reduction assay and ureide methods. Contents of nutrients (N, P, K, Ca, and Mg) were also measured to calculate their uptakes. In this study, synergistic effects of nitrogen fixation were induced by combined inoculation with SAY3-7, BLY3-8 and P4 in all tested soybean varieties. Therefore, we assumed that an effective biofertilizer could be produced using these effective bacteria (SAY3-7, BLY3-8, and P4). After making biofertilizer using these effective bacteria, packages were stored at 30

C. The populations of the bacteria in the biofertilizer were maintained at a density of 1 × 10
8
colony forming units (cfu) g


1
for P4 and 7 × 10
9
cells g


1
for Bradyrhizobium. Diluting biofertilizer by 10


3
proved more effective for nodulation and nitrogen fixation than other dilution treatments. Moreover, this biofertilizer significantly promoted plant growth, nodulation, nitrogen fixation, nutrient uptakes, and seed yield in Yezin-3 and Yezin-6 soybean varieties. Yezin-6 is a more efficient variety than Yezin-3 for improved plant growth, nodulation, nitrogen fixation, nutrient absorption, and seed yield. Taken together, the application of an effective biofertilizer and the use of an efficient soybean variety can play important roles in promoting plant growth, nodulation, nitrogen fixation, and higher seed yield..
2. Aung Zaw Htwe, Seinn Moh Moh, Khin Myat Soe, Kyi Moe, Takeo Yamakawa, Effects of biofertilizer produced from bradyrhizobium and streptomyces griseoflavus on plant growth, nodulation, nitrogen fixation, nutrient uptake, and Seed Yield of Mung Bean, Cowpea, and Soybean, Agronomy, 10.3390/agronomy9020077, 9, 2, 2019.02, The use of biofertilizers is important for sustainable agriculture, and the use of nodule bacteria and endophytic actinomycetes is an attractive way to enhance plant growth and yield. This study tested the effects of a biofertilizer produced from Bradyrhizobium strains and Streptomyces griseoflavus on leguminous, cereal, and vegetable crops. Nitrogen fixation was measured using the acetylene reduction assay. Under N-limited or N-supplemented conditions, the biofertilizer significantly promoted the shoot and root growth of mung bean, cowpea, and soybean compared with the control. Therefore, the biofertilizer used in this study was effective in mung bean, cowpea, and soybean regardless of N application. In this study, significant increments in plant growth, nodulation, nitrogen fixation, nitrogen, phosphorus, and potassium (NPK) uptake, and seed yield were found in mung beans and soybeans. Therefore, Bradyrhizobium japonicum SAY3-7 plus Bradyrhizobium elkanii BLY3-8 and Streptomyces griseoflavus are effective bacteria that can be used together as biofertilizer for the production of economically important leguminous crops, especially soybean and mung bean. The biofertilizer produced from Bradyrhizobium and S. griseoflavus P4 will be useful for both soybean and mung bean production..
3. Aung Zaw Htwe, Kenjirou Taira, Takeo Yamakawa, Searching for Myanmar indigenous Bradyrhizobium type C strains that best identify Rj
4
genotypes in soybean, Soil Science and Plant Nutrition, 10.1080/00380768.2019.1595137, 2019.01, Bradyrhizobium species are symbiotic partners of soybean plants. However, some Bradyrhizobium bacteria do not form functional nodules on the roots of Rj
4
genotype soybean cultivars. Our objective was to identify the strains of Bradyrhizobium (i.e., type C strains) that are least competent to form nodules on the roots of this plant genotype. We checked (i) previously isolated type C strains of Myanmar Bradyrhizobium elkanii (MMY6-1, MMY6-2, and MMY6-5), (ii) previously isolated type C strains of Myanmarese Bradyrhizobium spp. (MMY3-5 and MMY3-7), and (iii) strain Is-34 of B. japonicum, for nodule formation when associated with Rj
4
and other Rj genotype soybeans. Strains in groups (i), (ii), and (iii) are known to be incompatible with Rj
4
soybean genotypes. MMY3-5 and MMY3-7 produced functional nodules when associated with Rj
4
and other Rj genotype soybean cultivars, except Hill (Rj
4
) cultivar. The ratios of ineffective nodule numbers/total nodule numbers (I/T ratios) for MMY6-1, MMY6-2, MMY6-5, and Is-34 in association with Rj
4
soybean cultivars were > 0.5, demonstrating incompatibility between these bacterial strains and the Rj
4
genotype. Interestingly, the I/T ratios of MMY6-1 and MMY6-2 were higher than that of Is-34 in almost all Rj
4
soybean cultivars. Thus, the nodule-forming abilities of the B. elkanii strains MMY6-1 and MMY6-2 were strongly suppressed in Rj
4
soybean cultivars; these strains may therefore be useful to identify the Rj
4
genotype in soybean cultivars..
4. Masayuki Sugawara, Satoko Takahashi, Yosuke Umehara, Hiroya Iwano, Hirohito Tsurumaru, Haruka Odake, Yuta Suzuki, Hitoshi Kondo, Yuki Konno, Takeo Yamakawa, Shusei Sato, Hisayuki Mitsui, Kiwamu Minamisawa, Variation in bradyrhizobial NopP effector determines symbiotic incompatibility with Rj2-soybeans via effector-triggered immunity, Nature communications, 10.1038/s41467-018-05663-x, 9, 1, 2018.12, Genotype-specific incompatibility in legume–rhizobium symbiosis has been suggested to be controlled by effector-triggered immunity underlying pathogenic host-bacteria interactions. However, the rhizobial determinant interacting with the host resistance protein (e.g., Rj2) and the molecular mechanism of symbiotic incompatibility remain unclear. Using natural mutants of Bradyrhizobium diazoefficiens USDA 122, we identified a type III-secretory protein NopP as the determinant of symbiotic incompatibility with Rj2-soybean. The analysis of nopP mutations and variants in a culture collection reveal that three amino acid residues (R60, R67, and H173) in NopP are required for Rj2-mediated incompatibility. Complementation of rj2-soybean by the Rj2 allele confers the incompatibility induced by USDA 122-type NopP. In response to incompatible strains, Rj2-soybean plants activate defense marker gene PR-2 and suppress infection thread number at 2 days after inoculation. These results suggest that Rj2-soybeans monitor the specific variants of NopP and reject bradyrhizobial infection via effector-triggered immunity mediated by Rj2 protein..
5. Borin Khem, Yasumaru Hirai , Takeo Yamakawa, Yuki Mori, Eiji Inoue, Takashi Okayasu, Muneshi Mitsuoka, NPK balances in wholc crop ricc cultivation under diffcrcnt application rncthods of mantlrc alld chcllnical fcrtilizcr, システム農学, 64, 4, 87-99, 2018.12.
6. Seinn Moh Moh, Kyi Moe, Yasumasa Obo, Shiniti Obo, Aung Zaw Htwe, Takeo Yamakawa, Effects of Fermented Nori (Pyropia yezoensis) Seaweed Liquid Fertilizers on Growth Characteristics, Nutrient Uptake, and Iodine Content of Komatsuna (Brassica rapa L.) Cultivated in Soil., American Journal of Plant Sciences, 10.4236/ajps.2018.911161, 9, 2227-2243, 2018.10, We investigated the effects of fermented nori (Pyropia yezoensis ) liquid fertilizers on plant growth, soil plant analysis development (SPAD) values, and
nutrient uptake of komatsuna (Brassica rapa L. var. wakana komatsuna) plants. The four types of fermented nori seaweed liquid fertilizers (SLFs) evaluated
in this study were prepared by anaerobic fermentation of unwashed nori (SLF1), aerobic fermentation of unwashed nori (SLF2), anaerobic fermentation
of washed nori (SLF3), and aerobic fermentation of washed nori (SLF4). In Experiment 1, the highest plant growth, SPAD, and nutrient uptake
values were obtained from treatment with SLF2 and SLF4. There were no significant differences between the effects of basal and foliar application of
SLFs, except for iodine (I) content; plants treated with SLF1 had the highest I content. In Experiment 2, plant growth and nutrient uptake decreased with
higher concentrations of SLFs. Plants treated with 25% SLF2 + 75% chemical fertilizer (CF) or 25% SLF4 + 75% CF exhibited significantly higher plant
growth and nutrient uptake. The highest I content resulted from treatment with 75% SLF1 + 25% CF or 100% SLF1. Taken together, our results showed
that 25% SLF + 75% CF produced the best plant growth characteristics, nutrient uptake, and I content relative to the controls. Therefore, basal application
of these liquid organic fertilizers can be used to increase productivity, nutrient uptake, and I content and to reduce nitrate-nitrogen content in komatsuna production..
7. Seinn Moh Moh, Kyi Moe, Yasumasa Obo, Shiniti Obo, Aung Zaw Htwe, Takeo Yamakawa, Effects of Fermented Nori (Pyropia yezoensis) Seaweed Liquid Fertilizers on Growth Characteristics, Nutrient Uptake, and Iodine Content of Komatsuna (Brassica rapa L.) Cultivated in Soil., American Journal of Plant Sciences, 10.4236/ajps.2018.911161, 9, 2227-2243, 2018.10, We investigated the effects of fermented nori (Pyropia yezoensis ) liquid fertilizers on plant growth, soil plant analysis development (SPAD) values, and
nutrient uptake of komatsuna (Brassica rapa L. var. wakana komatsuna) plants. The four types of fermented nori seaweed liquid fertilizers (SLFs) evaluated
in this study were prepared by anaerobic fermentation of unwashed nori (SLF1), aerobic fermentation of unwashed nori (SLF2), anaerobic fermentation
of washed nori (SLF3), and aerobic fermentation of washed nori (SLF4). In Experiment 1, the highest plant growth, SPAD, and nutrient uptake
values were obtained from treatment with SLF2 and SLF4. There were no significant differences between the effects of basal and foliar application of
SLFs, except for iodine (I) content; plants treated with SLF1 had the highest I content. In Experiment 2, plant growth and nutrient uptake decreased with
higher concentrations of SLFs. Plants treated with 25% SLF2 + 75% chemical fertilizer (CF) or 25% SLF4 + 75% CF exhibited significantly higher plant
growth and nutrient uptake. The highest I content resulted from treatment with 75% SLF1 + 25% CF or 100% SLF1. Taken together, our results showed
that 25% SLF + 75% CF produced the best plant growth characteristics, nutrient uptake, and I content relative to the controls. Therefore, basal application
of these liquid organic fertilizers can be used to increase productivity, nutrient uptake, and I content and to reduce nitrate-nitrogen content in komatsuna production..
8. Aung Zaw Htwe, Takeo Yamakawa, Selection of type A and type B strains for improving symbiotic effectiveness on non-Rj and Rj4 genotype soybean varieties, Soil Science and Plant Nutrition, 10.1080/00380768.2018.1510285, 64, 5, 566-575, 2018.09, The selection of effective rhizobia for higher efficiency nitrogen fixation is one of the most important steps for inoculant production. Therefore, this experiment was conducted to select the most effective type A and type B strains for specific Rj-gene harboring soybean varieties and to test the symbiotic effectiveness of selected strains on different Rj-gene harboring soybean varieties. Screening experiments using the specific soybean varieties were done with a completely randomized design and three replications in this study. Evaluation of the effective Myanmar Bradyrhizobium strains for plant growth, nodulation and N2 fixation were studied in pot experiments using sterilized vermiculite in the Phytotron (controlled-environmental condition). Then, a pot experiment was conducted using Futsukaichi soil in the screen house (natural environmental condition). The N2 fixation ability of soybean was evaluated by acetylene reduction activity (ARA) and the relative ureide index method. In the first screening experiment, type A and type B strains with higher nitrogen fixation and proper nodulation on their respective soybean cultivars were selected for the next screening. In the second screening, Bradyrhizobium elkanii AHY3-1 (type A), Bradyrhizobium japonicum SAY3-7 (type A), B. elkanii BLY3-8 (type B) and B. japonicum SAY3-10 (type B) isolates, which showed higher nitrogen fixation and nodulation in Yezin-3 (Rj4) and Yezin-6 (non-Rj), were selected for the next experiment. In the third screening experiment, SAY3-7 and BLY3-8, which had higher nitrogen fixing potential and proper nodulation, were selected as effective isolates. These two isolates were compatible with non-Rj and Rj4 soybean varieties for nodulation and nitrogen fixation. Based on the results of the screening experiment, these two strains were tested for their symbiotic efficacy in Futsukaichi soil. This study shows that inoculation treatment of SAY3-7 and BLY3-8 significantly increased plant growth, nodulation, and N2 fixation at the V6, R3.5 and R8 stages in Yezin-3 (Rj4) and/or Yezin-6 (non-Rj), and the seed yield at R8 stage, in Yezin-3 (Rj4) and Yezin-6 (non-Rj) soybean varieties compared with the control treatment. It can be concluded that SAY3-7 and BLY3-8 are suitable for inoculant production because of their higher nitrogen fixation ability, proper nodulation and better productivity of Myanmar soybean cultivars..
9. Aung Zaw Htwe, Seinn Moh Moh, Kyi Moe and Takeo Yamakawa, Effects of co-inoculation of Bradyrhizobium elkanii BLY3-8 and Streptomyces griseoflavus P4 on Rj4 soybean varieties., Soil Science and Plant Nutrition, 10.1080/00380768.2018.1452574, 64, 4, 449-454, 2018.07, Co-inoculation of selected nitrogen-fixing bacteria with plant growth-promoting bacteria is the promising way for the improvement of soybean production through enhancing plant growth, nodulation, and N2 fixation. Therefore, this experiment was conducted to study the effects of co-inoculation of Bradyrhizobium elkanii BLY3-8 with Streptomyces griseoflavus P4 on plant growth, nodulation, N2 fixation, N uptake, and seed yield of Rj4 soybean varieties. Two experiments with completely randomized design and three replicates were done in this study. N2-fixation ability of soybean was evaluated by acetylene reduction activity (ARA) and relative ureide method. In the first experiment, synergetic effect in N2 fixation and nodulation was occurred in co-inoculation treatment (BLY3-8 + P4) in Yezin-3 and Fukuyutaka. Based on these results, co-inoculation effect of BLY3-8 and P4 was assessed on Yezin-3
and Fukuyutaka varieties at three different growth stages, using Futsukaichi soil under natural environmental conditions. This study shows that co-inoculation of BLY3-8 and P4 significantly increased N2 fixation at V6 stage; plant growth, nodulation, N2 fixation, and N uptake at R3.5 stage; and shoot
growth, N uptake, and seed yield at R8 stage, in Rj4 soybean varieties compared with the control. Significant difference in plant growth, nodulation, N2 fixation, N uptake, and yield between co-inoculation and control, not between single inoculation and control, suggests that there is a synergetic effect due to co-inoculation of BLY3-8 and P4..
10. Seinn Moh Moh, Kyi Moe, Yasumasa Obo, Shiniti Obo, Aung Zaw Htwe, Takeo Yamakawa , Effects of Fermented Nori (Pyropia yezoensis) Liquid Fertilizer on Plant Growth Characteristics and Nutrient Content of Komatsuna (Brassica rapa L. var. Wakana Komatsuna) Cultivated in Vermiculite., American Journal of Plant Sciences, 10.4236/ajps.2018.98116, 9, 1601-1617, 2018.07, We conducted plant growth experiments in microbe-free vermiculite to study the effects of four types of fermented seaweed liquid fertilizer (SLF) made from nori (Pyropia yezoensis ) seaweed on the germination, plant growth characteristics, SPAD value, and nutrient content and uptake of komatsuna (Brassica rapa L. var. wakana komatsuna). The four types of fermented nori SLF used in this study were prepared by anaerobic fermentation of unwashed
nori (SLF1), aerobic fermentation of unwashed nori (SLF2), anaerobic fermentation of washed nori (SLF3), and aerobic fermentation of washed nori
(SLF4). Komatsuna seeds treated with 200-, 300-, and 400-fold dilutions of SLFs exhibited improved relative germination ratios (RGRs) at 3 and 4 days
after sowing (DAS). At 4 DAS, the RGRs of seeds treated with 10-, 100-, 200-, 300-, and 400-fold SLF dilutions showed no differential effect. Seeds treated
with undiluted SLFs did not germinate by 4 DAS. SLF1 may promote komatsuna seed germination. The nitrogen (N), calcium, magnesium, sodium (Na),
and iodine (I) contents of plants treated with SLF1 were significantly increased relative to plants treated with the other SLFs. Moreover, the I and Na
contents of plants were significantly increased by foliar spray application of different dilutions of SLF1. However, SLF treatment markedly reduced the
shoot dry weight compared with ½-strength modified Hoagland nutrient (MHN) solution, although the same amounts of N and K were applied. SPAD
values of the plants treated with SLFs were significantly higher than those of plants treated with MHN. Foliar treatment with SLFs had no significant effect
on plant growth, SPAD value, or uptake of nutrients (except Na) relative to the control, but the I content was increased. Plants treated with SLF1 and
SLF2 exhibited the highest Na uptake. Foliar spray treatments with SLF1 resulted in the highest I contents in plants. Based on our results, SLF1 is suitable
for use as a liquid fertilizer to promote germination and increase nutrient content in komatsuna. These results need to be followed up in soil experiments
in the presence of microbes in the rhizosphere..
11. Borin Khem, Hirai Yasumaru, Takeo Yamakawa, Yuki Mori, Eiji Inoue, Takashi OKAYASU, Mitsuoka Muneshi, Effects of different application methods of fertilizer and manure on soil chemical properties and yield in whole crop rice cultivation., Soil Science and Plant Nutrition, 64, 3, 406-414, 2018.06.
12. Aung Zaw Htwe, Seinn Moh Moh, Kyi Moe and Takeo Yamakawa, Effects of co-inoculation of Bradyrhizobium japonicum SAY3-7 and Streptomycesgriseoflavus P4 on plant growth, nodulation, nitrogen fixation, nutrient uptake, and yield of soybean in a field condition, Soil Science and Plant Nutrition, 64, 2, 222-229, 2018.04.
13. Thieu Thi Phong Thu, Yasui Hideshi, Yamakawa Takeo, Allocation of Macronutrients in Roots, Sheaths, and Leaves Determines Salt Tolerance in Rice., American Journal of Plant Sciences, org/10.4236/ajps.2018.95081, 9, 1051-1069, 2018.04, To determine useful parameters for salt tolerance in rice and selection of salt-tolerant varieties, their macronutrient contents in roots, sheaths, and leaves were evaluated under salt stress condition. A hydroponic experiment was conducted to evaluate 29 rice varieties for salt tolerance. The salt stress treatment included an artificial seawater solution (electrical conductivity of 12 dS∙m−1). After a 2-week period of salt stress, standard evaluation scores (SES) of visual injuries for salt stress were assessed. In addition, we measured the contents of N, P, K, Na, Mg, and Ca in roots, sheaths, and leaves. The results showed that differences in macronutrients in the different plant tissues correlated with rice tolerance to the salt stress condition. Under the control treatment, salt-tolerant varieties exhibited low K content in root. Under the salt stress treatment, the salt-tolerant varieties exhibited low SES, high N content in leaves and sheaths, low Na content in leaves and sheaths, low Mg content in leaves and sheaths, and low Ca content in sheaths. The salt-tolerant varieties also exhibited high salt stress treatment/control treatment (ST/CT) ratios for dry matter in sheaths, N content in leaves and sheaths, and K content in sheaths, and low Na/K ratios in leaves and sheaths. Therefore, these parameters might be useful to understand salt tolerance in rice..
14. Doan Cong DIEN, Toshihiro MOCHIZUKI and Takeo YAMAKAWA, Morphology and Dry Matter Accumulation in Rice (Oryza sativa L.) Seedlings Under Drought Conditions, Journal of the Faculty of Agriculture Kyushu University, 62, 2, 309-322, 2017.09.
15. Thieu Thi Phong Thu, Yasui Hideshi, Yamakawa Takeo, Effects of salt stress on plant growth characteristics and mineral contents in diverse rice genotypes, Soil Science and Plant Nutrition, 63, 264-273, DOI: 10.1080/00380768.2017.1323672, 2017.06.
16. Yusuke Shiratori, Takeo Yamakawa, Mio Sakamoto, Hinomi Yoshida, Takuya Kitaoka, Quang Tuyen Tran, Duc Chanh Tin Doan and Mau Chien Dang, Biogas Production from Local Biomass Feedstock in the Mekong Delta and Its Utilization for a Direct Internal Reforming Solid Oxide Fuel Cell, Frontiers in Environmental Science, 5, doi: 10.3389/fenvs.2017.00025, 2017.05.
17. Kyi Moe, Kumudra Win Mg, Kyaw Kyaw Win, Takeo Yamakawa, Combined Effect of Organic Manures and Inorganic Fertilizers on the Growth and Yield of Hybrid Rice (Palethwe-1), American Journal of Plant Sciences, 8, 1022-1042, 2017.04.
18. Kyi Moe, Kumudra Win Mg, Kyaw Kyaw Win, Takeo Yamakawa, Effects of Combined Application of Inorganic Fertilizer and Organic Manures on Nitrogen Use and Recovery Efficiencies of Hybrid Rice (Palethwe-1), American Journal of Plant Sciences, 8, 1043-1064, 2017.04.
19. Doan Cong Dien, Takeo Yamakawa, Toshihiro Mochizuki, Aung Zaw Htwe, Dry Weight Accumulation, Root Plasticity, and Stomatal Conductance in Rice (Oryza sativa L.) Varieties under Drought Stress and Re-Watering Conditions, American Journal of Plant Sciences, 8, 3189-3206, DOI: 10.4236/ajps.2017.812215, 2017.04.
20. Aung Zaw Htwe, Takeo Yamakawa, Incompatible Nodulation of Bradyrhizobium elkanii Strains BLY3-8 and BLY6-1 with Rj3 Gene-Harboring Soybean Cultivars, American Journal of Plant Sciences, 8, 178-190, 2017.02.
21. Aung Zaw Htwe, Yu Kanesaki, Hirofumi Yoshikawa, Hirohito Tsurumaru, Takeo Yamakawa, Draft genome sequences of Bradyrhizobium elkanii strains BLY3-8 and BLY6-1, which are incompatible with Rj3 genotype soybean cultivars., Genome Announcements, 4, 5, e01169-16, 2016.10.
22. Aung Zaw Htwe, Takeo Yamakawa, Low-density co-inoculation with Bradyrhizobium japonicum SAY3-7 and Streptomyces griseoflavus P4 promotes plant growth and nitrogen fixation in soybean cultivars, American Journal of Plant Sciences, 7, 12, 1652-1661, 2016.08.
23. Papa Saliou SARR, Shigeru ARAKI, Didier Aime BEGOUDE, Martin YEMEFACK, Gabriel Ambroise MANGA, Takeo Yamakawa, Aung Zaw HTWE, Phylogeny and nitrogen fixation potential of Bradyrhizobium species isolated from the legume cover crop Pueraria phaseoloides in Eastern Cameroon., Soil Science and Plant Nutrition, 10.1080/00380768.2015.1086279, 62, 1, 13-19, 2016.02.
24. Youjin LIM, Kyosuk LEE, Dongsung LEE, Jin-Woong CHO, Takeo Yamakawa, Dougyoung CHUNG, Contents of Cations and Anions and Characterization of Stem Cell Wall Structures on Stem of Red Pepper Plants Infected by Phytophthora capsici. , J. Fac. Agr. Kyushu Univ., 61, 1, 23-28, 2016.02.
25. Aung Zaw Htwe, Takeo Yamakawa, Kyi Moe, Doan Cong Dien, Symbiotic effectiveness of different indigenous Bradyrhizobium strains on selected Rj-genes harboring Myanmar soybean cultivars., African Journal of Microbiology Research, 9, 49, 2345-2353, 2015.12.
26. Aung Zaw Htwe, Takeo Yamakawa, Enhanced plant growth and/or nitrogen fixation by leguminous and non-leguminous crops after single or dual inoculation of Streptomyces griseoflavus P4 with Bradyhizobium strains., African Journal of Microbiology Research, 9, 49, 2337-2344, 2015.12.
27. Aung Zaw Htwe, Yuchi Saeki, Kyi Moe, Tomoyuki Sakata, Determining nodulation regulatory (Rj) genes of Myanmar soybean cultivars and their symbiotic effectiveness with Bradyrhizobium japonicum USDA110, American Journal of Plant Sciences, 6, 2799-2810, 2015.11.
28. Aung Zaw Htwe, Takeo Yamakawa, Papa Saliou Sarr, Tomoyuki Sakata, Diversity and distribution of soybean-nodulation bradyrhizobia isolated from major soybean-growing regions in Myanma., African Journal of Microbiology Research, 9, 43, 2183-2196, 2015.10.
29. Tomoyuki Sakata, Yu Kanesaki, Hirofumi Yoshikawa, Hirohito Tsurumaru, Takeo Yamakawa, Draft genome of Bradyrhizobium japonicum Is-1, which is incompatible with Rj2 genotype soybeans., Genome Announcements, 3, 5, e01219-15, 2015.10.
30. Kyi Moe, Takeo Yamakawa, Thieu Thi Phong Thu, Yoshinori Kajihara, NPK accumulation and use efficiencies of Manawthukha rice affected by pre-transplant basal and split applications of nitrogen., Communications in Soil Science and Plant Analysis, 46, 20, 2534-2552, 2015.09.
31. Hirohito Tsurumaru, Syougo Hashimoto, Kouhei Okizaki, Yu Kanesaki, Hirofumi Yoshikawa, Takeo Yamakawa, A putative T3SS effector encoded by the MA20_12780 gene in Bradyrhizobium japonicum Is-34 causes the incompatibility with Rj4 genotype soybeans. , Appl. Environ. Microbiol., 81, 17, 5812-5819, 2015.09.
32. Borin Khem, Hirai Yasumaru, Takeo Yamakawa, 森 裕樹, Eiji Inoue, Takashi OKAYASU, Mitsuoka Muneshi, Production of rice for whole crop silage using manure in Itoshima region, Fukuoka prefecture. , J. Fac. Agr. Kyushu Univ., 60, 1, 65-71, 2015.02.
33. Lu-Jing GAN, Xiang-Yu WANG, Dan YANG, ung-Ah SHIN, Ki-Teak LEE, eung- Hee LEE, Takeo Yamakawa, Jin-Woong CHO, Comparison of nutritional composition of premature, mature and de-hulled barley in Korea., J. Fac. Agr. Kyushu Univ., 60, 1, 57-63, 2015.02.
34. Papa Saliou Sarr, Shunsei Fujimoto, Takeo Yamakawa, Nodulation, Nitrogen Fixation and Growth of Rhizobia-Inoculated Cowpea (Vigna unguiculata L. Walp) In Relation with External Nitrogen and Light Intensity., International Journal of Plant Biology & Researc, 3, 1, 1025-1036, 2015.01.
35. Hirohito Tsurumaru, Yu Kanesaki, Kouhei Okizaki, Syougo Hashimoto, Hirofumi Yoshikawa, Takeo Yamakawa, Draft genome of Bradyrhizobium japonicum Is-34 that is incompatible with Rj4 genotype soybeans., Genome Announcements, 2, 6, e01316-14, 2014.12.
36. Kyi Moe, Takeo Yamakawa, Thieu Thi Phong Thu, Yoshinori Kajihara, The effects of pre-transplant basal and split applications of nitrogen on the growth and yield of Manawthukha rice., Communications in Soil Science and Plant Analysis, 45, 2833-2851, 2014.11.
37. Takeo Yamakawa, Youko FUKUSHIMA, Low inoculum densities of Bradyrhizobium japonicum USDA 110 is effective on production of soybean (Glycine max L. Merr.) cultivar Fukuyutaka., J. Fac. Agr. Kyushu Univ., 59, 1, 45-53, 2014.02, [URL].
38. Thieu Thi Phong THU, Takeo Yamakawa, Kyi MOE, Effect of nitrogen application timing on growth, grain yield and eating quality of the KD18 and TH3-3 rice varieties., J. Fac. Agr. Kyushu Univ., 59, 1, 55-64, 2014.02, [URL].
39. Khin Myat Soe, Takeo Yamakawa, Shogo Hashimoto, Papa Saliou Sarr, Phylogenetic diversity of indigenous soybean bradyrhizobia from different agro-climatic regions in Myanmar, ScienceAsia, 10.2306/scienceasia1513-1874.2013.39.574, 39, 6, 574-583, 2013.12.
40. YUICHI SAEKI, SOKICHI SHIRO, TOSHIYUKI TAJIMA, AKIHIRO YAMAMOTO, REIKO SAMESHIMA-SAITO, TAKASHI SATO, Takeo Yamakawa, Mathematical Ecology Analysis of Geographical Distribution of Soybean-Nodulating Bradyrhizobia in Japan., Microbes Environ, 10.1264/jsme2.ME13079, 28, 4, 470-478, 2013.12, [URL].
41. Papa Saliou SARR, Macoumba DIOUF, Mariama Dalanda DIALLO, Saliou NDIAYE, Rouguiyatou DIA, Aliou GUISSE, Takeo Yamakawa, Effects of Different Types of Litters and Fertilizer Application on Growth and Productivity of Maize (Zea mays L. var. Across 86 Pool 16) in Senegal., J. Fac. Agr. Kyushu Univ., 58, 2, 259-267, 2013.10, [URL].
42. Khin Myat Soe, Takeo Yamakawa, Low-Density Co-Inoculation of Myanmar Bradyrhizobium yuanmingense MAS34 and Streptomyces griseoflavus P4 to Enhance Symbiosis and Seed Yield in Soybean Varieties., American Journal of Plant Sciences, 4, 9, 1879-1892, 2013.09.
43. , [URL].
44. Khin Myat Soe, Takeo Yamakawa, Evaluation of effective Myanmar Bradyrhizobium strains isolated from Myanmar soybean and effects of coinoculation with Streptomyces griseoflavus P4 
for nitrogen fixation. , Soil Science and Plant Nutrition, 10.1080/00380768.2012.682044, 59, 4, 361-370, 2013.08, [URL].
45. Sun-Ok CHUNG, Ki-Hyun CHO, Jin-Woong CHO, Ki-Youl JUNG, Takeo Yamakawa, Soil Texture Classification Algorithm Using RGB Characteristics of Soil Images, Journal of the Faculty of Agriculture, Kyushu University, 57, 2, 393-397, 2012.10, [URL].
46. Sun-Ok CHUNG, Jin-Woong CHO, Takeo Yamakawa, Development of a Motorized Digital Cone Penetrometer., Journal of the Faculty of Agriculture, Kyushu University, 57, 2, 399-404, 2012.10, [URL].
47. Khin Myat Soe, Ampan Bhromsiri, Dumnern Karladee, Takeo Yamakawa, Effects of Endophytic Actinomycetes and Bradyrhizobium japonicum strains on Growth, Nodulation, Nitrogen Fixation and Seed Weight of Different Soybean Varieties., Japanese Society of Soil Science and Plant Nutrition, 10.1080/00380768.2012.682044, 58, 3, 319-325, 2012.06, [URL].
48. Sokichi Shiro, Akihiro Yamamoto, Yosuke Umehara, Masaki Hayashi, Naoto Yoshida, Aya Nishiwaki, Takeo Yamakawa, Yuichi Saeki, Effect of Rj Genotype and Cultivation Temperature on the Community Structure of Soybean-Nodulating Bradyrhizobia, Appl. Environ. Microbiol., 78, 4, 1243-1250, 2012.02.
49. Hee Chung JI and Takeo YAMAKAWA, Cell wall contents and Estimation of Genetic Parameters for Polysora Rust Resistance in Tropical Maize (Zea mays L.)., J. Fac. Agr. Kyushu Univ., 56, 2, 231-236, 2011.10, [URL].
50. Takeo YAMAKAWA, Masayuki TANAKA, Masao SAKAI and Papa Saliou SARR, Genetic Grouping of Bradyrhizobium StrainsCompatible with Soybean (Glycine max L. Merr.) Harboring Rj-gene by AFLP-fingerprinting Analysis., J. Fac. Agr. Kyushu Univ., 56, 2, 223-229, 2011.10, [URL].
51. Papa SALIOU SARR, Takeo YAMAKAWA, Yuichi Saeki and Aliou GUISSE, Phylogenetic diversity of indigenous cowpea bradyrhizobia from soils in Japan based on sequence analysis of the 16S-23S rRNA Internal Transcribed Spacer (ITS) region., Systematic and Applied Microbiology, 34, 4, 285-292 , 2011.06.
52. Aung Kyaw MYINT, Takeo YAMAKAWA, Takahide ZENMYO, Hoang Thi Bich TAO and Papa Saliou SARR, Effects of organic-manure application on growth, grain yield, and nitrogen, phosphorus, and potassium recoveries of rice variety Manawthuka in paddy soils of differing fertility., Communications in Soil Science and Plant Analysis, 42, 4, 457–474, 2011.02.
53. Papa SALIOU SARR, Takeo YAMAKAWA, S. ASATSUMA, Syunsei FUJIMOTO and Masao Sakai, Investigation of endophytic and symbiotic features of Ralstonia sp. TSC1 isolated from cowpea nodules., African Journal of Microbiology Research, 4, 19, 1959-1963 , 2010.10.
54. Aung Kyaw Myinta, Takeo Yamakawa, Yoshinori Kajihara, Khin Khin Marlar Myint and Takahide Zenmyo , Application of different organic and mineral fertilizers on the growth, yield and nutrient accumulation of rice in a Japanese ordinary paddy field. , Science World Journal, 5, 2, 47-54, 2010.07.
55. Aung Kyaw Myinta, Takeo Yamakawa, Yoshinori Kajihara, Khin Khin Marlar Myint and Takahide Zenmyo , Nitrogen dynamics in a paddy field fertilized with mineral and organic nitrogen sources. , American-Eurasian J. Agric. & Environ. Sci, 7, 2, 221-231, 2010.03.
56. Hee Chung JI, Hee Bong LEE and Takeo YAMAKAWA, Major Agricultural Characteristics and Antioxidants Analysis of the New Developed Colored Waxy Corn., J. Fac. Agr. Kyushu Univ., 55, 1, 55-59, 2010.02, [URL].
57. Hoang Thi Bich THAO and Takeo YAMAKAWA, Phosphate absorption of intact komatsuna plants as influenced by phosphite. , Soil Sci. Plant Nutr, 56, 1, 133-139, 2010.02, [URL].
58. Aung Kyaw MYINT・Takeo YAMAKAWA・Takahide ZENMYO , Plant growth, seed yield and apparent nutrient recovery of rice by the application of manure and fertilizer as different nitrogen sources on paddy soils. , J. Fac. Agr. Kyushu Univ., 54, 2, 329-337, 2009.10.
59. Yadana Khin LATT・ Aung Kyaw MYINT・Takeo YAMAKAWA・Kazuo OGATA , The effects of green manure (Sesbania rostrata) on the growth and yield of rice. , J. Fac. Agr. Kyushu Univ., 54, 2, 313-319, 2009.10.
60. Yuichi Saeki, Hiroko Oguro, Isao Akagi, Takeo Yamakawa and Akihiro Yamamoto, Diversity of internal transcribed spacer regions between 16S-23S rRNA genes among the three copies of soybean-nodulating Sinorhizobum strains. , Soil Sci. Plant Nutr, 55, 5, 627-633, 2009.10, [URL].
61. Takeo Yamakawa, Mayuko Yamano and Motoki Ikeda 2009 Effect of applied position of crushed fibrous-banboo and nitrogen fertilizer on yield and N, P, K accumulation of soybean (Glycine max L. Merr.) cv. Fukuyutaka. Jpn. J. Soil Sci. Plant Nutr., 80(4), 379-386


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62. Hoang Thi Bich THAO・Takeo YAMAKAWA・Katsuhiro SHIBATA, Effect of phosphite-phosphate interaction on growth and quality of hydroponic lettuce (Lactuca sativa L.), J. Plant Nutr. Soil Sci, 172, 3, 385-392, 2009.06.
63. Hoang Thi Bich THAO・Takeo YAMAKAWA, Phosphite (Phosphorous acid): Fungicide, fertilizer or bio-stimulator?, Soil Sci. Plant Nutr, 55, 2, 228-234, 2009.04.
64. Papa SALIOU SARR・Takeo YAMAKAWA・Syunsei FUJIMOTO・Yuichi SAEKI・Hoang Thi Bich THAO・Aung Kyaw MYINT , Phylogenic diversity and symbiotic effectiveness of root-nodulating bacteria associated with cowpea in the South-West area of Japan, Microbes Environ., 24 (2), 105-112 , 2009.03.
65. Takeo Yamakawa, Mayuko Yamano and Motoki Ikeda 2009 Effect of K and Mulching of Crushed Fibrous-Bamboo on Growth and Yield of Soybean (Glycine max L. Merr.) cv. Fukuyutaka. Jpn. J. Soil Sci. Plant Nutr., 80(1), 7-13


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66. Sarr P. S.,, Khouma M., Sene M., Guisse A., Badiane A. N. and Yamakawa T., Effect of natural phosphate rock enhanced compost on pearl millet-cowpea cropping systems. J. Fac. Agr. Kyushu Univ., 54 (1), 29-35, J. Fac. Agr. Kyushu Univ., 54, 1, 29-35, 2009.02.
67. Jin-Woong CHO and Takeo YAMAKAWA, Comparison of Dry Matter Production and Photosynthetic Rate against Different Planting Dates between Late and Early Maturing Soybean cultivars in Paddy Field. , J. Fac. Agr. Kyushu Univ., 53 (2), 389-393, 2008.10.
68. Jin-Woong CHO , Young-Jin OH, Jung D. SO and Takeo YAMAKAWA , Evaluation of Dense Planting Adaptation Characteristics of Small seed Soybeans by Principal Components Analysis., J. Fac. Agr. Kyushu Univ., 53 (2), 385-388, 2008.10.
69. Hee Chung JI and Takeo YAMAKAWA , Inheritance of Long Husk Leaves of Maize in Recombinant Inbred lines (RILs) ., J. Fac. Agr. Kyushu Univ., 53 (2), 379-384, 2008.10.
70. Hoang Thi Bich THAO・Takeo YAMAKAWA, Growth of Celery (Apium graveolens var. dulce) as influenced by Phosphite., J. Fac. Agr. Kyushu Univ., 53 (2), 375-378, 2008.10.
71. Hoang Thi Bich THAO, Takeo YAMAKAWA, Papa Saliou SARR, and Aung Kyaw MYINT, Effects of phosphite, a reduced form of phosphate, on growth and phosphorus nutrition of spinach (Spinacia oleracea L.) ., Soil Sci. Plant Nutr, 54(5), 738-743, 2008.10.
72. Hoang Thi Bich THAO, Takeo YAMAKAWA, Katsuhiro SHIBATA, Papa Saliou SARR, and Aung Kyaw MYINT, Growth response of komatsuna (Brassica rapa var. peruviridis) to root and foliar applications of phosphite fertilizer. , Plant and Soil, 54(2), 197-203, 2008.05.
73. Ueda S., Ikeda M. and Yamakawa T. , Provision of Carbon Skeletons for Amide Synthesis in Non-nodulated Legume Roots in Response to Supply of Nitrogen Source. , Soil Sci. Plant Nutr., 54(5), 732-737, 2008.04.
74. Hirohito Tsurumaru, Takeo Yamakawa, Masayuki Tanaka and Masao Sakai, Tn5 mutants of Bradyrhizobium japonicum Is-1 with altered compatibility with Rj2-soybean cultivars., Soil Sci. Plant Nutr., 54(2), 197-203, 2008.04.
75. Koutaro Suzuki, Hiroko Oguro, Takeo Yamakawa, Akihiro Yamamoto, Shoichiro Akao and Yuichi Saeki, Diversity and Distribution of Indigenous Soybean-Nodulating Rhizobia in the Okinawa Islands, Japan., Soil Sci. Plant Nutr., 54(2), 237-246, 2008.04.
76. Takeo Yamakawa, Naoko Okuda and Kenjirou Taira, The Difference between the micronutrients content of seedling’s root and root hair in several plant species., J. Fac. Agr. Kyushu Univ., 53 (1), 33-38, 2008.02.
77. Hirohito Tsurumaru, Takeo Yamakawa, Masayuki Tanaka and Masao Saka, The efficient strategy of plasmid rescue from Tn5 mutants derived from Bradyrhizobium japonicum Is-1, based on whole genome sequence information of strain USDA110., J. Fac. Agr. Kyushu Univ., 53 (1), 27-31, 2008.02.
78. Hoang Thi Bich THAO, Thomas GEORGE, Takeo YAMAKAWA and Ladiyani Retno WIDOWATI, Effects of soil aggregate size on phosphorus extractability and uptake by rice (Oryza sativa L.) and corn (Zea mays L.) in two Ultisols from Philippines., Soil Sci. Plant Nutr., 54 (1), 148-158, 2008.02.
79. Papa Saliou SARR, Mamadou KHOUMA, Modou SENE, Aliou GUISSE, Aminata Niane BADIANE , Takeo YAMAKAWA, Effect of Pearl millet-cowpea cropping systems on nitrogen recovery, nitrogen use efficiency and biological fixation using 15N tracer technique., Soil Sci. Plant Nutr., 54 (1), 142-147, 2008.02.
80. Young-Jin OH, Kyong-Ho KIM, Jung-Gon KIM, Jin-Woong CHO and Takeo YAMAKAWA, Growth traits and sink capacity in late sown soybean cultivars with different stem lengths, J. Fac. Agr. Kyushu Univ., 52 (2), 299-305, 2007.10.
81. Hee Chung Ji, Young Il Kim, Hee Bong Lee, Jin-Woong Cho , Sung Seo and Takeo Yamakawa, Genetic Diversity of Colored Rice Lines Based on Botanical Characteristics and Simple Sequence Repeat (SSR) Markers., J. Fac. Agr. Kyushu Univ., 52 (2), 287-293, 2007.10.
82. Yuichi Saeki, Tadashi Murata, Takeo Yamakawa and Shoichiro Akao, Differentiation of soybean-nodulating Bradyrhizobium USDA strains by restriction fragment length polymorphism analysis of 23S-5S rRNA genes, Soil Sci. Plant Nutr., 53 (5), 562-567, 2007.10.
83. Takeo Yamakawa, Yoshie Nakano and Arisa Yamada Methods of purification and quantitative determination of soybean isoflavones with HPLC. Jpn. J. Soil Sci. Plant Nutr., 78, 2, 171-177


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84. Takeo Yamakawa, Yoshie Nakano, Sayuri Kajihara and Toshihiro Mochizuki Effect of filling temperature on the transition of isoflavone content in soybean plant. Jpn. J. Soil Sci. Plant Nutr., 78, 1, 39-44

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85. Takeo Yamakawa, Yoshie Nakano, Arisa Yamada, Sayuri Kajihara and Toshihiro Mochizuki Difference by soybean cultivar and harvest year of isoflavone content in soybean seed. Jpn. J. Soil Sci. Plant Nutr., 78, 1, 33-38



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86. Yamakawa T. and K. Taira Effect of inoculation of Bradyrhizobium japonicum withdifferent compatibility on deformation of root hairs in soybean plant. Sci. Bull. Fac. Agri. Kyushu Univ., 61, 2, 177-183.
87. Fukushima, Y. and T. Yamakawa Effect of difference of inoculation methods of Bradyrhizobium japonicum USDA110 on production of soybean (Glycine max L. Merr.). Sci. Bull. Fac. Agri. Kyushu Univ., 61, 2, 171-176.
88. Saeki Y., Aimi N., Tsukamoto S., Yamakawa T., Nagatomo Y. and Akao S., Diversity and Geographical Distribution of Indigenous Soybean-Nodulating bradyrhizobia in Japan., Soil Science and Plant Nutrition, 52, 4, 418-426, 2006.08.
89. Tanaka K., Shimizu T., Zakari M., Njoloma J., Saeki Y., Sakai M., Yamakawa T., Minamizawa K. and Akao S., Incorpration of a DNA sequence encoding Green fluorescent protein (GFP) into endphytic diazotrop from sugarcane and sweet potato and the colonizing ability of these bacteri in Brassica oleracea., Microbes Environ, 21, 2, 122-128, 2006.07.
90. Ji H. C., Cho J. -W. and Yamakawa T. , Diallel Analysis of Plant and Ear Heights in Tropical Maize (Zea mays L.). , J. Fac. Agr. Kyushu Univ, 51, 2, 233-238, 2006.02.
91. Cho J.-W., Ji H. C. and Yamakawa T., Comparison of Photosynthetic Response of Two Soybean Cultivars to Soil Flooding. , J. Fac. Agr. Kyushu Univ, 51, 2, 227-232, 2006.02.
92. Cho J.-W. and Yamakawa T., Tolerance Differences among Small Seed Soybean Cultivars against Excessive Water Stress Conditions. , J. Fac. Agr. Kyushu Univ, 51, 2, 195-199, 2006.02.
93. Cho J.-W. and Yamakawa T., Effects on Growth and Seed Yield of Small Seed Soybean Cultivars of Flooding Conditions in Paddy Field., J. Fac. Agr. Kyushu Univ, 51, 2, 189-193, 2006.02.
94. Saeki Y., Kaneko A., Hara T., Suzuki K., Yamakawa T., Minh N. T., Nagatomo Y., and Akao S., Phylogenetic Analysis of Soybean-Nodulating Rhizobia Isolated from Alkaline Soils in Vietnam., Soil Science and Plant Nutrition, 10.1111/j.1747-0765.2005.tb00143.x, 51, 7, 1043-1052, 51, 7, 1043-1052, 2005.12.
95. The condition of cultivation for the root hair of the soybean (Glycine max L. Merr.)seedlings to appear favorably, and the separation of the root hair
Takeo Yamakawa and Kenjirou Taira, Japnese Journal of soil Science and Plant Nutrition, 76 (4), 471-475.
96. Yamakawa T., Ikeda T., and Ishizuka J., Effects of CO2 Concentration in Rhizosphere on Nodulation and N2 Fixation of Soybean and Cowpea, Soil Science and Plant Nutrition, 50, 5, 713-720, 50, 5, 713-720, 2004.10.
97. Yamakawa T., Hussain A.K.M.A., and Ishizuka J., Soybean preference for Bradyrhizobium japonicum for nodulation. Occupation of Serogroup USDA110 in nodules of soybean plants harboring various Rj-genes grown in a field., Soil Science and Plant Nutrition, 49, 6, 835-841, 49, 6, 835-841, 2003.12.
98. Manolov, I.G., Ikeda, M. and Yamakawa T., Effect of methods of nitrogen application on nitrogen recovery from 15N-labeled urea applied to paddy rice (Oryze sativa L.)., J. Fac. Agr. Kyushu Univ, 48, 1-2, 1-11, 48, 1-2, 1-11., 2003.10.
99. Yamakawa T. and Ishizuka J., Effect of nodulation with Bradyrhizobium japonicum and Shinorhizobium fredii on xylem sap composition of Peking (Glycine max L. Merr.)., Soil Sci. Plant Nutr., 48, 4, 521-527, 48, 4, 521-527, 2002.08.
100. Variental differnces in the effects of flooding on the nodule growth, nitrogen fixing activity in soybean. Shao-H. Zheng, Osamu Kusuda, Hirosaki Makamoto, Takeo Yamalkawa, Tadahiko Furuya and Masataka Fukuyama, J. Fac. Agr. Kyushu Univ. , 56, 3139-144, 2002.
101. Variental differnces in the effects of submerging on the nodulation, nitrogenase activity of root nodule in soybean. S.-H. Zheng, O. Kusuda, H. Makamoto, T. Yamalkawa, T. Furuya and M. Fukuyama, Jpn. J. Crop Sci., 70, 325-326, 2001.
102. Yamakawa T., Shirai T., and Ishizuka J., Effects of Symbiosis with Rhizobium fredii on Transport of Fixed Nitrogen in the Xylem of Soybean Plants., Soil Sci. Plant Nutr, 46, 4, 885-892, 46, 4, 885-892, 2000.01.
103. Yamakawa T., Eriguchi M., Hussain A.K.M.A., and Ishizuka J., Soybean preference for Bradyrhizobium japonicum for nodulation. Nodulation by Rj2Rj3Rj4-genotypes isolated from the progenies of cross of soybean cvs. IAC-2 (Rj2Rj3) and Hill (Rj4)., Soil Sci. Plant Nutr., 45, 2, 461-469, 45, 2, 461-469, 1999.01.
104. Saeki Y., Yamakawa T., Ikeda M., and Ishizuka J., Nodule formation and distribution of Rj2Rj3-genotype soybean infected with Bradyrhizobium japonicum., J. Fac. Agr. Kyushu Univ., 43, 3-4, 317-326, 43, 3-4, 317-326, 1999.01.
105. Md. Mizanur R. Bhuiyan, Takeo Yamakawa, Masamichi Kikuchi and Motoki Ikeda, Irrigation of Secondary Sewage Effluent: Salinity and Nitrogen Effects on Growth and Nitrogen Fixation of Nodulated and Non-nodulated Soybeans., J. Fac. Agr. Kyushu Univ., 42, 3-4, 273-280, 43, 4, 273-280., 1998.01.