| Project/Area Number |
25660017
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| Research Category |
Grant-in-Aid for Challenging Exploratory Research
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| Allocation Type | Single-year Grants |
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| Research Field |
Crop production science
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| Research Institution | Kobe University |
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Principal Investigator |
ITOH Kazuyuki 神戸大学, (連合)農学研究科(研究院), 教授 (80355271)
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| Co-Investigator(Kenkyū-buntansha) |
AZUMA Tetsushi 神戸大学, 大学院農学研究科, 准教授 (30231913)
SASAYAMA Daisuke 神戸大学, 自然科学系先端融合研究環, 特命助教 (20554249)
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| Project Period (FY) |
2013-04-01 – 2014-03-31
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| Project Status |
Completed (Fiscal Year 2013)
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| Budget Amount *help |
¥3,120,000 (Direct Cost: ¥2,400,000、Indirect Cost: ¥720,000)
Fiscal Year 2013: ¥3,120,000 (Direct Cost: ¥2,400,000、Indirect Cost: ¥720,000)
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| Keywords | 水田雑草 / オモダカ / ウリカワ |
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| Research Abstract |
Internode elongation of Sagittaria trifolia plants was induced by submergence irrespective of cover soil or glass beads.On the other hand, submergence-induced internode elongation of S. pygmaea plants was dependent on the presence of cover soil or glass beads. We examined gaseous factors responsible for the enhanced internode elongation in these species, because gas accumulation easily occurs in submerged plant tissues. Treatment of the plant hormone ethylene, which is known to enhance elongation growth in many aquatic plant species, indeed stimulated leaf elongation but failed to promote internode elongation in both Sagittaria species. We found that hypoxia or anoxia generated by submergence serves as an initial growth-promoting factor for internode elongation in S. trifolia, and carbon dioxide accumulated during submergence trigger internode elongation in S. pygmaea.
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