Kyushu University Academic Staff Educational and Research Activities Database
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Syuntaro Hiradate Last modified date:2019.06.06

Professor / Division of Bioproduction Environmental Sciences
Department of Agro-environmental Sciences
Faculty of Agriculture


Graduate School
Undergraduate School


E-Mail
Academic Degree
Ph.D. (Agriculture)
Country of degree conferring institution (Overseas)
No
Field of Specialization
Soil Science
Total Priod of education and research career in the foreign country
00years06months
Outline Activities
Based on soil science, I perform education and research activities to establish suitable and sustainable management system of agricultural soils, develop soil evaluation methods, clarify soil chemical reactions, conserve biodiversity, clarify material cycling in ecosystems, etc. In laboratory experiment, I try to analyze soils using cutting-edge analytical techniques, such as nuclear magnetic resonance spectroscopy and mass spectroscopy in addition to general chemical analyses. Also, I conduct field survey on Ogasawara Islands and Aso-Kuju National Parks, etc., for their conservation research.
Research
Research Interests
  • Regulation of soil environment for the conservation of biodiversity and ecosystems
    keyword : avalable phosphate in soils, exchangeable acidity, alien plants, endemic plants
    2017.04~2021.03.
  • Interactions between soil components and plant essential elements
    keyword : Phosphorous,Nuclear Magnetic Resonance
    2017.04~2019.03.
Academic Activities
Papers
1. Katsutoshi Nishino, Misao Shiro, Ryuki Okura, Kazuya Oizumi, Toru Fujita, Takahiro Sasamori, Norihiro Tokitoh, Akiyoshi Yamada, Chihiro Tanaka, Muneyoshi Yamaguchi, Syuntaro Hiradate, Nobuhiro Hirai, The (oxalato)aluminate complex as an antimicrobial substance protecting the "shiro" of Tricholoma matsutake from soil micro-organisms, Bioscience, Biotechnology and Biochemistry, 10.1080/09168451.2016.1238298, 81, 1, 102-111, 2017.01, Tricholoma matsutake, a basidiomycete, forms ectomycorrhizas with Pinus densiflora as the host tree. Its fruiting body, "matsutake" in Japanese, is an edible and highly prized mushroom, and it grows in a circle called a fairy ring. Beneath the fairy ring of T. matsutake, a whitish mycelium-soil aggregated zone, called "shiro" in Japanese, develops. The front of the shiro, an active mycorrhizal zone, functions to gather nutrients from the soil and roots to nourish the fairy ring. Bacteria and sporulating fungi decrease from the shiro front, whereas they increase inside and outside the shiro front. Ohara demonstrated that the shiro front exhibited antimicrobial activity, but the antimicrobial substance has remained unidentified for 50 years. We have identified the antimicrobial substance as the (oxalato)aluminate complex, known as a reaction product of oxalic acid and aluminum phosphate to release soluble phosphorus. The complex protects the shiro from micro-organisms, and contributes to its development..
Membership in Academic Society
  • Soil Science Society of America
  • THE ECOLOGICAL SOCIETY OF JAPAN
  • JAPANESE HUMIC SUBSTANCES SOCIETY
  • JAPANESE SOCIETY OF PEDOLOGY
  • THE CLAY SCIENCE SOCIETY OF JAPAN
  • JAPANESE SOCIETY OF SOIL SCIENCE AND PLANT NUTRITION
Educational
Educational Activities
I teach students soil functions and roles, fundamental soil constituents, soil organisms, soil formation and taxonomy, soil analytical methods, etc. Based on the fundamental knowledge of soil science, I performed education activity on environmental science, agricultural production science, ecology, conservation, etc.