论文部分内容阅读
以一些生育期相近的云南、江苏太湖水稻地方品种为材料,根据其光合强度对温度、光强、水分的反应,进行光合生理生态特性的解析。 结果表明,这两大地理生态区域的品种分属不同的光合生态型。这种类别不仅存在于籼、粳两亚种间,而且表现在亚种内。按照各自发展光合生产潜力所要求的光、温、水分等条件的最适组合,初步认为,云南水稻品种为“嗜中强光、温暖、偏湿生”光合生态型;而江苏太湖地区水稻品种为“嗜强光、高温、偏水生”光合生态型。另外,云南品种内还呈现出垂直光合生态型的分化。 根据植物特性与环境统一的观点,可以认为,太湖地区品种光合生态型的形成是对当地强光、炎热和水网密布等生境条件的适应;云南品种的光合生态型是对当地弱光、温暖和低土壤湿度的适应。 根据以上结果,作者就如何应用地方品种光合生态型和选育特定适应性品种的策略进行了讨论。
Taking some rice landraces in Taihu Lake of Yunnan and Jiangsu with similar growth periods as materials, the photosynthetic ecophysiological characteristics were analyzed based on the responses of photosynthesis intensity to temperature, light intensity and water content. The results showed that the two geographical ecotypes belong to different photosynthetic ecotypes. This category exists not only in indica and japonica subspecies, but also in subspecies. According to the optimum combinations of light, temperature and moisture required by their respective potential for photosynthetic production, it is preliminarily believed that the Yunnan rice varieties are photosynthetic ecotypes with strong, moderate and partial wetness, while rice varieties in Taihu Lake, Jiangsu Province, For the “strong light, high temperature, partial aquatic” photosynthetic type. In addition, within the Yunnan variety also showed the vertical photosynthetic ecotype differentiation. According to the unity of plant characteristics and environment, it can be concluded that the formation of photosynthetic ecotypes in Taihu Lake region is adaptable to the habitat conditions such as glare, heat and water network in Yunnan Province. The photosynthetic ecotypes of Yunnan cultivars are suitable for low light and warm And low soil moisture adaptation. Based on the above results, the authors discuss how to apply the photosynthetic ecotypes of local varieties and the selection of specific adaptive varieties.