Role of alternative oxidase pathway in protection against drought-induced photoinhibition in pepper leaves
Role of alternative oxidase pathway in protection against drought-induced photoinhibition in pepper leaves
复制标题
替代氧化酶途径在防止辣椒叶片干旱诱导的光抑制中的作用
DOI：
10.1007/s11099-018-0837-1
复制
发表时间：
2018-12-01
期刊：
影响因子：
2.7
通讯作者：
Ye, X. L.
中科院分区：
文献类型：
--
作者：
Hu, W. H.;Yan, X. H.;Ye, X. L.
The aim of this study was to assess the impact of the mitochondrial alternative oxidase (AOX) pathway on energy metabolism in chloroplasts, and evaluate the importance of the AOX in alleviating drought-induced photoinhibition in pepper (Capsicum annuumL.). Inhibition of AOX pathway decreased photosynthesis and increased thermal energy dissipation in plants under normal conditions. It indicated that AOX pathway could influence chloroplast energy metabolism. Drought reduced carbon assimilation. Photoinhibition was caused by excess of absorbed light energy in spite of the increase of thermal energy dissipation and cyclic electron flow around PSI (CEF-PSI). Upregulation of AOX pathway in leaves experiencing drought would play a critical role in protection against photoinhibition by optimization of carbon assimilation and PSII function, which would avoid over-reduction of photosynthetic electron transport chain. However, inhibition of AOX pathway could be compensated by increasing the thermal energy dissipation and CEF-PSI under drought stress, and the compensation of CEF-PSI was especially significant.
