| Budget Amount *help |
¥2,730,000 (Direct Cost: ¥2,100,000、Indirect Cost: ¥630,000)
Fiscal Year 2015: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2014: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
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| Outline of Final Research Achievements |
Root hair is a tubular-shaped cell that emerges from a specific root epidermal cell and contributes to water absorption, nutrient uptake and root anchoring. As well as these important functions, root hair has been intensively studied with regard to its characteristic morphogenesis. It has been reported that multiple signals mediated by calcium, phosphatidylinositol 4,5-bisphosphate (PI(4,5)P2), reactive oxygen species and Rho-related GTPases are esssential for the root hair tip growth. Of these, PI(4,5)P2 is thought to promote root hair elongation. However, molecular mechanisms that control PI(4,5)P2 signal during tip growth is poorly understood.
Here, I visualized the dynamics of Arabidopsis PI(4,5)P2/calcium-binding protein PCaP2 and PI(4,5)P2 signal using a live-cell imaging technique. I found that PCaP2 is involved in spatio-temporal localization of PI(4,5)P2 signal on plasma membrane to control root hair tip growth.
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