| Project/Area Number |
12834011
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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 Institution | Kyushu University |
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Principal Investigator |
OKABE Hirotaka Kyushu University, Graduate School of Engineering, Associate Professor, 大学院・工学研究院, 助教授 (90221142)
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| Co-Investigator(Kenkyū-buntansha) |
KAI Shoichi Kyushu University, Graduate School of Engineering, Professor, 大学院・工学研究院, 教授 (20112295)
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| Project Period (FY) |
2000 – 2001
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| Project Status |
Completed (Fiscal Year 2001)
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| Budget Amount *help |
¥3,400,000 (Direct Cost: ¥3,400,000)
Fiscal Year 2001: ¥1,400,000 (Direct Cost: ¥1,400,000)
Fiscal Year 2000: ¥2,000,000 (Direct Cost: ¥2,000,000)
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| Keywords | plant / edge effect / allelopathy / cluster / nonlinear interaction / phytohormone / pattern / periodicity / 周縁効果 |
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| Research Abstract |
An ecologically relevant pattern formation process mediated by hormonal interactions among growing seedlings is modeled based on the experimental observations on the effects of indole acetic acid, which can act as an inhibitor and activator of root growth depending on its concentration.
In the absence of any lateral root with constant hormone-sensitivity, the edge effect phenomenon is obtained depending on the secretion rate of hormone from the main root. Introduction of growth-stage-dependent hormone-sensitivity drastically amplifies the initial randomness, resulting in spatially irregular macroscopic patterns. When the lateral root growth is introduced, periodic patterns are obtained whose periodicity depends on the length of lateral roots.
The growth-stage-dependent hormone-sensitivity and the lateral root growth are crucial for macroscopic periodic-pattern formation.
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