Mathematical biological understanding of microbial response to phosphorus in soil by a community ecological approach

2016 Fiscal Year Final Research Report

• Project/Area Number: 26292035
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Partial Multi-year Fund
• Section: 一般
• Research Field: Plant nutrition/Soil science
• Research Institution: The University of Tokyo
• Principal Investigator: OTSUKA Shigeto 東京大学, 農学生命科学研究科, 准教授 (10313074)
• Co-Investigator(Kenkyū-buntansha): 長岡 一成 国立研究開発法人農業・食品産業技術総合研究機構, 中央農業総合研究センター土壌肥料研究領域, 主任研究員 (80355544) ; 國頭 恭 信州大学, 理学部, 准教授 (90304659)
• Project Period (FY): 2014-04-01 – 2017-03-31
• Keywords: 土壌微生物 / リン可給性 / 群集構造 / 遺伝子組成 / 土壌酵素 / 資源配分

Outline of Final Research Achievements

The community structure based on 16S rDNA and the composition of alkaline phosphatase (ALP) gene, phoD, of soil bacteria in field andisols had a strong correlation with soil pH. Multiple regression analysis considering the Interaction effect showed that the relationship between available P concentration and the enzyme activity ratio of acid phosphatase (ACP) to beta-glucosidase (BG) depended on soil pH and the community structure.
In experimental microcosms of andisol and brown forest soil, the addition of C- and N- sources disturbed microbial community structure, and increased the enzyme activity ratios of ALP/BG and ACP/BG. However, the ratios later decreased nearly to the original level.

Free Research Field

土壌微生物学