Effects of Daylength, Temperature and Nitrogen Level on the Heading of Rice Plants under the Controlled Environments
Effects of Daylength, Temperature and Nitrogen Level on the Heading of Rice Plants under the Controlled Environments
复制标题
控制环境下日照长度、温度和氮素水平对水稻抽穗的影响
DOI：
10.1626/jcs.44.382
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发表时间：
1975
影响因子：
--
通讯作者：
N. Hosoi
中科院分区：
文献类型：
--
作者：
N. Hosoi
分析了在控制环境下水稻植株抽穗对日照、温度和氮素水平的响应。1. 水稻（粳稻）抽穗对温度的响应一方面取决于日照长度，另一方面取决于日照长度。在高温条件下光敏性变暗，在低温条件下光敏性变明显。这些结果表明，在不同条件下，某一品系抽穗反应的热敏性和光敏性表达可能不同。2. 培养基施氮量对播种至抽穗的生育期无显著影响。在抽穗反应中，氮素水平与温度、日照长度无交互作用。3. 在短日照条件下，早、晚菌株对温度的敏感性无显著差异。但在长日照条件下，晚熟品系的影响大于早熟品系。早期品系的抽穗在高温条件下不受日长影响，在低温条件下受日长影响较小。高温条件下晚熟品系抽穗受日长影响较大，低温条件下受日长影响较小。4.这些结果可能表明，高纬度地区水稻植株在育种过程的几个步骤中，对日长和生长温度的抽穗责任有所降低
The heading response of rice plants to daylength, temperature and nitrogen level was analysed under controlled environments in phytotron. 1. The heading response of rice plants (japonica) to temperature depended on daylength, and on the other hand, the response to daylength depended on temperature. The photo-sensitivity became duller under high temperature and more conspicuous under low temperature condition. These results indicated that the expression of thermo- and photo-sensitivity in heading response of a certain strain may vary with alternative conditions. 2. Nitrogen levels of culture medium did not influence on the growth duration from sowing to heading. No interaction was observed between nitrogen level and temperature or daylength in the heading response. 3. Under short day condition the sensitivity to temperature did not differ between early and late strains. But that of late strains was affected more strongly than early ones under long day condition. The heading of early strains was not affected by daylength under high temperature but affected slightly by daylength under low temperature. The heading of late strains was affected by daylength under high temperature, while it was more affected by daylength under low temperature than under high temperature. 4.These results may suggest that the rice plants in high latitudes have been lowered in the heading responsibility to daylength and growth temperature at several steps of the breeding Process