Improvement of P uptake from unavailable forms in the soil by enhancement of secreting function of organic acids and phosphatase

2014 Fiscal Year Final Research Report

• Project/Area Number: 23688010
• Research Category: Grant-in-Aid for Young Scientists (A)
• Allocation Type: Single-year Grants
• Research Field: Plant nutrition/Soil science
• Research Institution: Hiroshima University
• Principal Investigator: WASAKI Jun 広島大学, 生物圏科学研究科, 准教授 (00374728)
• Project Period (FY): 2011-04-01 – 2015-03-31
• Keywords: リン / 有機酸 / 酸性ホスファターゼ / 分泌 / シロバナルーピン / トランスポーター / 土壌未利用リン / シロイヌナズナ

Outline of Final Research Achievements

It is expected to save amount of P fertilizer usage, because the resource is depleting. On the other hand, unavailable forms of P are accumulated in cultivated lands. Specific group of plants has ability to access the unavailable P by high ability to secrete organic acids and phosphatase. This study aimed to investigate and apply their functions.
Several genes for organic acid transporter have been isolated from plants, which are able to access unavailable P. It was suggested that these transporters contributed to higher ability of organic acid exudation. It was indicated that transformation of organic acid transporter and acid phosphatase improved the availability of P in the rhizosphere soil by their mobilizing functions.

Free Research Field

植物栄養学・土壌微生物学