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受旱植物往往是营养器官衰老加快,光合能力下降,碳氮库(籽粒)急剧发展(Turner及Begg,1981).这表明,受旱植物的碳、氮代谢之间有着密切的联系;也表明,同时研究碳素和氮素的分配是有用处的.干旱对籽粒早期生长的影响,特别是对减少胚乳细胞分裂和淀粉粒形成的影响,其原因与其说是缺乏同化物,不如说流向籽粒的韧皮部汁液中的碳氮
Drought plants tend to accelerate the aging of vegetative organs, decrease photosynthetic capacity, and rapid development of carbon and nitrogen sinks (grains) (Turner and Begg, 1981), suggesting a close relationship between carbon and nitrogen metabolism in drought-tolerant plants , While studying the distribution of carbon and nitrogen is useful.Drought on the early grain growth, especially to reduce endosperm cell division and starch grain formation, the reason is not so much the lack of assimilation, as it flows to the grain Of phloem juice in the carbon and nitrogen