Language：English  

CiNii Research

Language：Japanese   Publishing type：Research paper (scientific journal)   Publisher：MDPI AG  

In this study, targeted metabolome analysis was applied to identify the discriminative metabolites between Indonesian shallot landraces, Japanese long-day onion (LDO) varieties, and Japanese short-day onion (SDO) varieties. In total, 172 metabolite signal intensities were subjected to multivariate PLS-DA, VIP, and random forest modeling to gain further insight into genotype-specific metabolites. PLS-DA divides the examined genotypes into three different clusters, implying that shallot landraces exhibited a distinct metabolite profile compared with Japanese LDO and SDO varieties. The PLS-DA, VIP, and random forest results indicated that the shallot and LDO are richer in metabolite constituents in comparison with the SDO. Specifically, amino acids and organosulfur compounds were the key characteristic metabolites in shallot and LDO genotypes. The analysis of S-alk(en)yl-L-cysteine sulfoxide (ACSO) compounds showed higher accumulation in the shallot landraces relative to LDO and SDO varieties, which explains the stronger pungency and odor in shallots. In addition, the LDO showed higher ACSO content compared with the SDO, implying that long-day cultivation might enhance sulfur assimilation in the Japanese onion. The LDO ‘Super Kitamomiji’ and the shallots ‘Probolinggo’ and ‘Thailand’ showed higher ACSO content than other varieties, making it useful for Allium breeding to improve the flavor and stress tolerance of onions.

DOI： 10.3390/metabo12121260

Web of Science

Scopus

PubMed

researchmap

Language：English   Publishing type：Research paper (scientific journal)  

DOI： https://doi.org/10.2503/hortj.UTD-350

Language：English   Publishing type：Research paper (scientific journal)   Publisher：The Japanese Society for Horticultural Science  

<p>Characteristics and inheritance of rhizome coloration in the red rhizome lotus (<i>Nelumbo nucifera</i>) ‘Tomohiro’ were investigated to achieve stable production and breeding of red rhizome cultivars. Rhizome coloration proceeded from the basal internodes to distal ones during the growing stage, and coloration of enlarged distal rhizomes was completed in October. No individuals with both red and white rhizomes in one plant were found, and there were no rhizomes with a mottled pattern or an intermediate color between red and white. The coloration of the skin and flesh was synchronized in red rhizome plants. It was therefore estimated that the skin and flesh coloration of rhizomes was controlled by the same gene. Rhizomes of all selfed plants of ‘Tomohiro’ and white rhizome cultivars were red and white, respectively, and all F₁ plants generated by crossing ‘Tomohiro’ and white rhizome cultivars were white. Rhizome color in F₂ plants generated by self-pollination of F₁ plants divided into white and red individuals with a 3:1 ratio. These results suggested that red rhizome coloration is governed by a single locus, designated <i>RHIZOME COLOR</i> (<i>RHC</i>), with dominant white (<i>Rhc</i>) and recessive red (<i>rhc</i>) coloration alleles.</p>

DOI： 10.2503/hortj.utd-350

Web of Science

Scopus

CiNii Research

researchmap

Language：English   Publishing type：Research paper (scientific journal)  

DOI： 10.3390/molecules26051415

Language：Japanese   Publishing type：Research paper (scientific journal)  

DOI： 10.3390/molecules25225300

Language：Japanese   Publishing type：Research paper (scientific journal)  

Language：Japanese   Publishing type：Research paper (scientific journal)  

DOI： https://doi.org/10.1038/s41598-019-39856-1

Language：Japanese   Publishing type：Research paper (scientific journal)  

Wide-ranging varieties and/or strains of bulb onions (Allium cepa Common onion group) and shallots (A. cepa Aggregatum group) were utilized to understand the variation in chemical compounds responsible for their taste. The bulb samples of 10 F1 commercial onion varieties (seven short-day and three long-day varieties) from Japan and 12 shallot landraces from abroad (Vietnam: three landraces; Indonesia: nine landraces) were collected as plant materials once a year in 2014 and 2015. The contents of S-alk(en)yl-L-cysteine sulfoxides, total flavonoids, and soluble sugars—including fructose, glucose, sucrose, and fructans—were determined to find differences between bulb onions and shallots, as well as to detect variations among varieties and/or landraces. While a principal component analysis (PCA) based on the results from both 2014 and 2015 could clearly discriminate shallots from bulb onions from a phytochemical perspective, bulb onions mainly had higher monosaccharides than shallots. By contrast, shallots produced more disaccharides than bulb onions. In most cases, regression analyses using the numerical data of the chemical compounds found in bulb onions and shallots suggested year-year correlations between 2014 and 2015. The flavonoid and PeCSO (S-(1-propenyl)-L- cysteine sulfoxide: isoalliin) contents in shallots were higher than those detected in bulb onions, which indicated the stronger pungent and bitter taste could be attributable to excess amounts of these compounds in this tropical plant.

DOI： 10.2503/hortj.OKD-066

Language：Japanese   Publishing type：Research paper (scientific journal)  

DOI： https://doi.org/10.1007/s10722-015-0233-7

Language：Japanese   Publishing type：Research paper (scientific journal)  

DOI： https://doi.org/10.1007/s10681-015-1476-2

Language：Japanese   Publishing type：Research paper (scientific journal)  

Event date： 2022.9

Language：Japanese  

Venue：山形大学・オンライン併用   Country：Japan  

researchmap

Event date： 2022.3

Language：Japanese  

Venue：千葉大学・オンライン併用   Country：Japan  

Event date： 2022.3

Language：Japanese  

Venue：千葉大学・オンライン併用   Country：Japan  

Event date： 2022.3

Language：Japanese  

Venue：千葉大学・オンライン併用   Country：Japan  

researchmap

Event date： 2022.3

Language：Japanese  

Venue：千葉大学・オンライン併用   Country：Japan  

researchmap

Event date： 2021.9

Language：Japanese  

Venue：岐阜大学・オンライン併用   Country：Japan  

Event date： 2021.9

Language：Japanese  

Venue：岐阜大学・オンライン併用   Country：Japan  

Event date： 2021.3

Language：Japanese  

Venue：オンライン開催   Country：Japan  

Event date： 2020.3 - 2021.3

Language：Japanese  

Venue：東京農工大学小金井キャンパス（新型コロナウィルス感染拡大のため中止）   Country：Japan  

Event date： 2020.3

Language：Japanese  

Venue：東京農工大学小金井キャンパス（新型コロナウィルス感染拡大のため中止）   Country：Japan  

Event date： 2019.9

Language：Japanese  

Venue：島根大学松江キャンパス   Country：Japan  

Language：Japanese  

Language：Japanese  

Language：Japanese  

Type：Research consultation

researchmap