油菜素内酯和脯氨酸通过作用于抗氧化系统缓解盐胁迫下的光合和产量抑制。
Epibrassinolide and proline alleviate the photosynthetic and yield inhibition under salt stress by acting on antioxidant system in mustard.
机构信息
Plant Physiology and Biochemistry Research Lab, Department of Botany, University of Kashmir, Srinagar, 190006, India.
Plant Physiology Section, Department of Botany, Aligarh Muslim University, Aligarh, 202002, India.
出版信息
Plant Physiol Biochem. 2019 Feb;135:385-394. doi: 10.1016/j.plaphy.2019.01.002. Epub 2019 Jan 2.
Soil salinity is one of the major abiotic stress factors that hampers plant growth and productivity by limiting photosynthesis and other related metabolic processes. In this study we investigated whether treatment with proline and/or 24-epibrassinolide (EBL) to two contrasting cultivars of Brassica juncea (L.) Czern and Coss viz. Varuna and RH-30 could counteract with the adverse effects of salinity on photosynthesis and seed yield. Plants were treated with proline and/or 24-epibrassinolide (EBL) at 28 and 29d-stages of growth. Salt stress reduced plant growth, photosynthetic attributes, efficiency of PSII (Fv/Fm), leaf water potential and finally seed yield, at harvest but improved the activity of antioxidant enzymes in both the cultivars in a concentration dependent manner. Exogenous application of EBL with proline completely neutralised the adverse effects of salt at 78 mM or 117 mM stress levels whereas the treatment partially neutralised the impact of highest salt concentration of 156 mM, through the upregulation of the antioxidant system.
土壤盐度是一种主要的非生物胁迫因素，通过限制光合作用和其他相关代谢过程来阻碍植物生长和生产力。在这项研究中，我们研究了用脯氨酸和/或 24-表油菜素内酯（EBL）处理两种不同的芥菜（L.）Czern 和 Coss 品种，即 Varuna 和 RH-30，是否可以抵消盐度对光合作用和种子产量的不利影响。在生长的 28 天和 29 天阶段，用脯氨酸和/或 24-表油菜素内酯（EBL）处理植物。盐胁迫降低了植物生长、光合作用特性、PSII（Fv/Fm）效率、叶片水势，最终在收获时降低了种子产量，但以浓度依赖的方式提高了两个品种中抗氧化酶的活性。脯氨酸与 EBL 的外源应用完全中和了 78 mM 或 117 mM 胁迫水平下盐的不利影响，而通过抗氧化系统的上调，该处理部分中和了最高盐浓度 156 mM 的影响。
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