Effects of Drought Stress on the Photosynthesis of Sweet Potato Seedlings
[Objective] The research aimed to provide theoretical basis for the cultivation of sweet potato with high yield and drought resistance. [Method] With 3 varieties of sweet potato including Yi 306,Yushu 8 and Ayamurasaki as materials, the effects of drought stress on the photosynthetic characteristics of the leaves in sweet potato seedlings such as net photosynthetic rate (Ph),intercellular CO2 concentration(Ci),stomatal conductance (Cond) and transpiration rate (Tr) were studied. [Result] Under drought stress,Pn,Cond and Tr of the leaves in the seedlings of 3 sweet potato varieties were all decreased, and Ci showed a trend of first decreasing and then increasing. In the whole stress period, the decreasing amplitude of Pn, Cond and Tr in Yi 306 and Yushu 8 were all much greater than that in Ayamurasaki. [ Conclusion] The results of this research indicated that Ayamurasaki was more tolerant to drought than Yi 306 and Yushu 8.
国家科技期刊平台
NSTL
万方数据
维普
