光合作用
光抑制
蒸腾作用
光强度
植物
电子传输链
光合能力
化学
阳光
猝灭(荧光)
光合效率
叶绿素荧光
园艺
光系统II
生物
荧光
物理
天文
光学
量子力学
作者
Xiaqing Yu,Xia Ming,Min Xiong,C. ZHANG,Le Yue,Lili Yang,Chunyu Fan
出处
期刊:Photosynthetica
[Institute of Experimental Botany]
日期:2022-05-02
卷期号:60 (2): 168-178
被引量:3
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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