| Project/Area Number |
03454042
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| Research Category |
Grant-in-Aid for General Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Research Field |
作物
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| Research Institution | Nagoya University |
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Principal Investigator |
TAKEOKA Yoji Nagoya U., Sch.Agric.Sci., Professor, 農学部, 教授 (70023455)
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| Co-Investigator(Kenkyū-buntansha) |
WADA Tomikichi Nagoya U., Sch.Agric.Sci., Res.Asso., 農学部, 助手 (20158702)
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| Project Period (FY) |
1991 – 1993
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| Project Status |
Completed (Fiscal Year 1993)
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| Budget Amount *help |
¥6,500,000 (Direct Cost: ¥6,500,000)
Fiscal Year 1993: ¥600,000 (Direct Cost: ¥600,000)
Fiscal Year 1992: ¥500,000 (Direct Cost: ¥500,000)
Fiscal Year 1991: ¥5,400,000 (Direct Cost: ¥5,400,000)
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| Keywords | Rice / Spikelet / Young Panicle / Morphogenesis / Pistil hyperplasia / Sex expression / イネ小穂 / 貫生 / 環境ストレス / エチレン / アブシジン酸 / ナフタレン酢酸 / ジベレリン |
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| Research Abstract |
1.Morphogenetic response under stressed environments was characterized based on our laboratories' results. Morphogenesis of spikelet organs between a mutant, REDS-1, and its original cultivar, Reimei, was examined. Even under the usual cultivation, structure of spikelet organs in REDS-1 showed morphological abnormality. While these abnormality is similar to pistil hyperplasia derived from those response to some adverse environments, the stamen hyperplasia as well as fertile pollen and mature grain formation were found to be expressed, as a specificity of REDS-1.
2.Using high yield paddy rice varieties comparing with a standard one, morphogenesis in panicle and spikelet was observed under cryo-scanning electron microscope. In the high yield variety, a large number of branch and spikelet primodia were differentiated. By gibberellin application during this stage, young spikelets produced pistillate organs, and most of them thereafter degenerated.
3.Developmental events of anther and pollen were followed up using a high resolution light microscopy. The different response to low temperature in two different stages between cultivar Koshihikari and Kinmaze was estimated microsopically.
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