A study on the mode of action of thermospermine in the stem growth of plants
| Project/Area Number |
22370021
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Plant molecular biology/Plant physiology
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| Research Institution | Okayama University |
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Principal Investigator |
TAKAHASHI Taku 岡山大学, 自然科学研究科, 教授 (20271710)
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| Co-Investigator(Kenkyū-buntansha) |
MOTOSE Hiroyasu 岡山大学, 大学院・自然科学研究科, 准教授 (70342863)
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| Project Period (FY) |
2010-04-01 – 2014-03-31
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| Project Status |
Completed (Fiscal Year 2013)
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| Budget Amount *help |
¥17,940,000 (Direct Cost: ¥13,800,000、Indirect Cost: ¥4,140,000)
Fiscal Year 2013: ¥3,120,000 (Direct Cost: ¥2,400,000、Indirect Cost: ¥720,000)
Fiscal Year 2012: ¥3,120,000 (Direct Cost: ¥2,400,000、Indirect Cost: ¥720,000)
Fiscal Year 2011: ¥3,120,000 (Direct Cost: ¥2,400,000、Indirect Cost: ¥720,000)
Fiscal Year 2010: ¥8,580,000 (Direct Cost: ¥6,600,000、Indirect Cost: ¥1,980,000)
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| Keywords | 植物 / 発生 / ポリアミン / 維管束 / 突然変異 / シロイヌナズナ / 発生・分化 / 分子遺伝学 / 遺伝子発現 / 翻訳制御 |
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| Research Abstract |
Thermospermine functions in repressing xylem differentiation in plants and its deficiency results in excess proliferation of xylem vessels and severe dwarfism. To know the mode of action of thermospermine, we have isolated suppressor mutants of a thermospermine-requiring mutant of Arabidopsis that restore the dwarf phenotype, and revealed that sac53-d and sac56-d mutants are defective in a gene encoding ribosomal protein RACK1 and L4, respectively. We further found that thermospermine can be functionally replaced with norspermine. A chemical screening experiment revealed that thermospermine and auxin have an opposite function in xylem differentiation.
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Report
(5 results)
Research Products
(38 results)
