| Project/Area Number |
12680600
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Bioorganic chemistry
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| Research Institution | KEIO UNIVERSITY |
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Principal Investigator |
KOSEMURA Seiji Keio University, Faculty of Law, Associate Professor, 法学部, 助教授 (70231313)
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| Project Period (FY) |
2000 – 2003
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| Project Status |
Completed (Fiscal Year 2003)
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| Budget Amount *help |
¥3,600,000 (Direct Cost: ¥3,600,000)
Fiscal Year 2003: ¥700,000 (Direct Cost: ¥700,000)
Fiscal Year 2002: ¥700,000 (Direct Cost: ¥700,000)
Fiscal Year 2001: ¥1,100,000 (Direct Cost: ¥1,100,000)
Fiscal Year 2000: ¥1,100,000 (Direct Cost: ¥1,100,000)
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| Keywords | phototropism / Zea mays / benzoxazolinone / Vigno mungo / p-hydroxy cinnamic acid / Fagopyrum esculentum / unsaturated fatty acid / hydroperoxide / ミロシナーゼ / 阻害剤 / ダイコン / 光親和性ラベル試薬 / MBOA / DIMBOA / 前駆体 |
|---|
| Research Abstract |
Phototropism is one of the common growth responses of plants to unilateral irradiation. Went proposed that phototropism is caused by a lateral gradient of growth-promoting auxin in the bending organ (Cholodny-Went theory). Recently, Bruinsma found that the shaded half did not contain more auxin than the illuminated ones as required by the C.-W. theory. Instead it was found that the even distribution of auxin was accompanied by a lateral gradient of growth-inhibitory substances during phototropic curvature.
We have been investigating the relationship between plant growth inhibitors and growth inhibition by light in plants, and have succeeded in isolation some light-induced growth inhibitors and these precursors related to phototropism, raphanusanins from radish (Raphanus sativus var. hortensis f. gigantissimus M.) hypocotyls, 6-methoxy-2-benzoxazolinone from light-grown maize (Zea mays L.) shoots, 3-hydroxy-β-ionone from light-grown dwarf bean (Phaseolus vulgaris) shoots, p-hydroxy cinnamic acid from light-grown bean (Vigno mango L.) seedlings, unsaturated fatty acid hydroperoxides from light-grown buckwheat (Fagopyrum esculentum) seedlings and 8-epixanthatin from sunflower (Helianthus annuus L).
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