Partial shade improved the photosynthetic capacity and polysaccharide accumulation of the medicinal plant Bletilla ochracea Schltr.
文献类型： 外文期刊
作者： Yu, X. F. 1 ; Ming, X. Y. 1 ; Xiong, M. 1 ; Zhang, C. 2 ; Yue, L. J. 1 ; Yang, L. 1 ; Fan, C. Y. 1 ;
作者机构： 1.Sichuan Agr Univ, Coll Landscape Architecture, Chengdu 611130, Peoples R China
2.Sichuan Acad Agr Sci, Ind Crop Res Inst, Chengdu 610300, Peoples R China
关键词： Bletilla ochracea Schltr; chlorophyll fluorescence; photosynthesis; shade
期刊名称：PHOTOSYNTHETICA （ 影响因子：2.482； 五年影响因子：3.427 ）
ISSN： 0300-3604
年卷期： 2022 年 60 卷 2 期
页码：
收录情况： SCI
摘要： To study the light intensity suitable for Bletilla ochracea Schltr., morphology, photosynthetic parameters, and polysaccharide content of seedlings were evaluated under different light intensities. All shade treatments promoted plant growth and net photosynthetic rate while having no significant effect on transpiration rate. The maximum photochemical efficiency and potential photochemical efficiency reached the lowest values under full sunlight. The electron transport rate and photochemical quenching under shade were significantly higher than those under full light, while nonphotochemical quenching was the highest under full light. This indicated that the shade alleviated photoinhibition in summer and improved the utilization of light. B. ochracea could adapt to different light intensities, enhancing photosynthetic efficiency under low light by improving the electron transport and the degree of opened PSII reaction centers, and adapting to high light by increasing heat dissipation. Plant growth, photosynthesis, and polysaccharide accumulation of B. ochracea greatly increased under 76.4% shade.
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