Development and application of novel methods for diagnosis of phytoplankton physiological status
Project/Area Number |
22710003
|
Research Category |
Grant-in-Aid for Young Scientists (B)
|
Allocation Type | Single-year Grants |
Research Field |
Environmental dynamic analysis
|
Research Institution | The University of Tokyo |
Principal Investigator |
SATO Mitsuhide 東京大学, 大学院・農学生命科学研究科, 助教 (60466810)
|
Project Period (FY) |
2010 – 2012
|
Project Status |
Completed (Fiscal Year 2012)
|
Budget Amount *help |
¥4,030,000 (Direct Cost: ¥3,100,000、Indirect Cost: ¥930,000)
Fiscal Year 2012: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2011: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2010: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
|
Keywords | 生物海洋 / 植物プランクトン / リン / アルカリフォスファターゼ / 蛍光基質 / 生物海洋学 / 鉄 / アルカリホスファターゼ / 微量金属 / フローサイトメトリー / 蛍光プローブ / 定量PCR |
Research Abstract |
Various methods to diagnose phytoplankton physiological status were applied to cultured and natural phytoplankton populations and their validity was examined. In this process, some cultures of oceanic pico- and nanophytoplankton were established. Among them, it was confirmed that measurement of phosphate monoesterase and diesterase activities using fluorogenic substrates in combination with a fluorescent probe ELF-97 were very effective in detecting phosphorus limitation of phytoplankton. By applying this method in the North and South Pacific, the map of phosphorus limitation was drawn throughout the Pacific Ocean. From kinetics studies, it was found that phosphate diesters are recycled much slower than monoesters in the surface water of the tropical Pacific, which is an important result for biogeochemical cycles of phosphorus.
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Report
(4 results)
Research Products
(7 results)