数字农科院2.0

Selenite affected photosynthesis of Oryza sativa L. exposed to antimonite: Electron transfer, carbon fixation, pigment synthesis via a combined analysis of physiology and transcriptome

文献类型： 外文期刊

作者： Pingping Zhao;Zi Han Wu;Ya Ting Zheng;Jun Shen;Yan Ming Zhu;Qiao Yuan Chen;Bo Wang;Feng Xia Yang;Yong Zhen Ding;Hong Liu;Feng Wang;Christopher Rensing;Renwei Feng

作者机构：

关键词： Carbon assimilation and metabolism;Chlorophyll fluorescence;Gas exchange parameters;Photosynthetic system;Transcriptome

期刊名称： Plant Physiology and Biochemistry

ISSN： 0981-9428

年卷期： 2023 年 201 卷

页码：

收录情况： SCIE（2023版）

摘要： Selenium (Se) is a microelement that can counteract (a)biotic stresses in plants. Excess antimony (Sb) will inhibit plant photosynthesis, which can be alleviated by appropriate doses of Se but the associated mechanisms at the molecular levels have not been fully explored. Here, a rice variety (Yongyou 9) was exposed to selenite [Se(IV), 0.2 and 0.8 mg L−1] alone or combined with antimonite [Sb(III), 5 and 10 mg L−1]. When compared to the 10 mg L−1 Sb treatment alone, addition of Se in a dose–dependent manner 1) reduced the heat dissipation efficiency resulting from the inhibited donors, Sb concentrations in shoots and roots, leaf concentrations of fructose, H2O2 and O2•–; 2) enhanced heat dissipation efficiency resulting from the inhibited accepters value, concentrations of Chl a, sucrose and starch, and the enzyme activity of adenosine diphosphate glucose pyrophosphorylase, sucrose phosphate synthase, and sucrose synthase; but 3) did not alter gas exchange parameters, concentrations of Chl b and total Chl, enzyme activity of soluble acid invertase, and values of maximum P700 signal, photochemical efficiency of PSI and electron transport rate of PSI. Se alleviated the damage caused by Sb to the oxygen–evolving complex and promoted the transfer of electrons from QA to QB. When compared to the 10 mg L−1 Sb treatment alone, addition of Se 1) up–regulated genes correlated to synthesis pathways of Chl, carotenoid, sucrose and glucose; 2) disturbed signal transduction pathway of abscisic acid; and 3) upregulated gene expression correlated to photosynthetic complexes (OsFd1, OsFER1 and OsFER2).

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