2011 Fiscal Year Final Research Report
PLANT ARCHITECTURE : TRADE-OFF BETWEEN GROWTH AND MECHANICAL STABILITY
| Project/Area Number |
20370015
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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 |
Ecology/Environment
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| Research Institution | Tokyo University of Agriculture |
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Principal Investigator |
HIROSE Tadaki 東京農業大学, 国際食料情報学部, 教授 (90092311)
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| Co-Investigator(Kenkyū-buntansha) |
HIKOSAKA Kouki 東北大学, 大学院・生命科学研究科, 教授 (10272006)
KINUGASA Toshihiko 鳥取大学, 農学部, 助教 (80403377)
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| Co-Investigator(Renkei-kenkyūsha) |
NAGASIMA Hisae 東北大学, 大学院・生命科学研究科, 研究員 (20323503)
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| Project Period (FY) |
2008 – 2011
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| Keywords | 生理生態 |
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| Research Abstract |
We studied the effect of planting density on plant architecture with particular attention to growth and mechanical strength of metamers. Crowded plants elongated their stem at the expense of mechanical stability. On the other hand, uncrowded plants reduced elongation and increased light interception by lateral extension of branches. Nitrogen use efficiency was higher in uncrowded plants, whereas light use efficiency was higher in crowded plants. Yang's modulus of elasticity increased with increasing dry mass density of stem. Stems of crowded plants had a lower dry mass density, but Yang's modulus per dry mass density was higher. However, they increased stem height to the limit of lodging.
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