| Co-Investigator(Renkei-kenkyūsha) |
FUJII Nobuharu 東北大学, 大学院生命科学研究科, 准教授 (70272002)
MIYAZAWA Yutaka 東北大学, 大学院生命科学研究科, 助教 (00342858)
YAMAZAKI Tomokazu 東北大学, 大学院生命科学研究科, 博士研究員 (40400189)
KOBAYASHI Akie 東北大学, 大学院生命科学研究科, 助教 (60463783)
MORITA Miyo 奈良先端科学技術大学院大学, バイオサイエンス研究科, 准教授 (10314535)
|
|---|
| Budget Amount *help |
¥72,280,000 (Direct Cost: ¥55,600,000、Indirect Cost: ¥16,680,000)
Fiscal Year 2014: ¥11,830,000 (Direct Cost: ¥9,100,000、Indirect Cost: ¥2,730,000)
Fiscal Year 2013: ¥12,350,000 (Direct Cost: ¥9,500,000、Indirect Cost: ¥2,850,000)
Fiscal Year 2012: ¥14,170,000 (Direct Cost: ¥10,900,000、Indirect Cost: ¥3,270,000)
Fiscal Year 2011: ¥11,180,000 (Direct Cost: ¥8,600,000、Indirect Cost: ¥2,580,000)
Fiscal Year 2010: ¥22,750,000 (Direct Cost: ¥17,500,000、Indirect Cost: ¥5,250,000)
|
|---|
| Outline of Final Research Achievements |
We attempted to understand the functions of MIZ1 and MIZ2 molecules essential for hydrotropism in roots, an overall pathway of hydrotropism, and its role in nature. We identified cells/tissues required for hydrotropism and novel regulators of hydrotropism in relation to MIZ1 and MIZ2 functions in Arabidopsis roots. It was shown that light and abscisic acid independently regulated MIZ1 transcription and thereby hydrotropic response and that MIZ1 might play a role in hydrotropism and lateral root formation by negatively regulating auxin content. Furthermore, we found that MIZ1-overexpressors enhanced hydrotropic response and the MIZ1-mediated hydrotropism could contribute to plant biomass production and survival in nature by regulating root-system development under water-limited conditions. On the other hand, analyses with other plants such as rice, lotus, and peas revealed the molecular mechanisms that differed among plant species.
|
