Distinct characteristics of two natural auxins in plants
| Project/Area Number |
24370027
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Partial Multi-year Fund |
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| Section | 一般 |
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| Research Field |
Plant molecular biology/Plant physiology
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| Research Institution | The Institute of Physical and Chemical Research |
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Principal Investigator |
KASAHARA Hiroyuki 独立行政法人理化学研究所, 環境資源科学研究センター, 上級研究員 (00342767)
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| Project Period (FY) |
2012-04-01 – 2015-03-31
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| Project Status |
Completed (Fiscal Year 2014)
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| Budget Amount *help |
¥17,810,000 (Direct Cost: ¥13,700,000、Indirect Cost: ¥4,110,000)
Fiscal Year 2014: ¥5,720,000 (Direct Cost: ¥4,400,000、Indirect Cost: ¥1,320,000)
Fiscal Year 2013: ¥5,720,000 (Direct Cost: ¥4,400,000、Indirect Cost: ¥1,320,000)
Fiscal Year 2012: ¥6,370,000 (Direct Cost: ¥4,900,000、Indirect Cost: ¥1,470,000)
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| Keywords | オーキシン / インドール-3-酢酸 / フェニル酢酸 / 情報伝達 / 極性輸送 / 生合成 / 植物ホルモン / 代謝 / 成長制御 |
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| Outline of Final Research Achievements |
In this study, I demonstrate that indole-3-acetic acid (IAA) and phenyl acetic acid (PAA) have overlapping regulatory roles but distinct transport characteristics as auxins in plants. I demonstrate that PAA is widely distributed in plant kingdom. Although biological activities of PAA are lower than those of IAA, the endogenous amounts of PAA are much higher than those of IAA in various plant tissues in Arabidopsis. PAA and IAA can regulate the same set of auxin responsive genes through the TIR1/AFB-Aux/IAA pathway. TAA and YUCCA families may contribute to PAA biosynthesis. IAA actively forms concentration gradients in maize coleoptiles in response to gravitropic stimulation, whereas PAA does not, suggesting that PAA is not actively transported in a polar manner. These results suggests that PAA may play important roles in the regulation of plant growth and development.
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Report
(4 results)
Research Products
(7 results)
