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首页> 外文期刊>Russian Journal of Plant Physiology >Selenium Ameliorates Salinity Stress in Petroselinum crispum by Modulation of Photosynthesis and by Reducing Shoot Na Accumulation
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Selenium Ameliorates Salinity Stress in Petroselinum crispum by Modulation of Photosynthesis and by Reducing Shoot Na Accumulation

机译：硒通过调节光合作用和减少芽Na积累来改善唾液酸纤维蛋白酶的盐度胁迫

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摘要

This study was performed to understand the mechanisms for Se-enhanced resistance of parsley (Petroselinum crispum L.) plants to salinity stress. Plant growth was negatively affected by salt stress; however, Se treatments at 1 mg/L significantly improved the growth rate and enhanced the salt tolerance of seedlings. This increased tolerance in Se-supplied plants was obtained by reduced damaging effect on maximal quantum yield of photosystem II (PSII) (F-v/F-m) coupled with higher levels of carotenoids and non-photochemical quenching (NPQ). The performance index (PIABS), as evidence for modulation of PSII function, was downregulated by salt stress; while Se mitigated this effect. Moreover, analysis of OJIP transients demon-strated that Se reduced salt damaging effect on PSII function through improvement of excitation energy trapping (TR0/CS) and electron transport (ET0/CS) per excited cross-section of leaf. The Na concentrations in shoots and roots of parsley seedlings considerably enhanced after NaCl treatment. Interestingly, treatment of salt-stressed plants with Se decreased the Na contents in shoots via the limitation of the root-to-shoot translocation of Na and exclusion of Na from cell sap, as well as the retention of K/Na and Ca/Na ratios. These data provide the first evidence that the Se application alleviates salinity stress by enhancing PSII function and by decreasing Na content in the shoot via binding of Na to the root cell wall.
机译：进行该研究以了解荷兰芹（Petroselinum Crispum L.）植物盐度胁迫的Se增强抗性的机制。植物生长受盐胁迫的负面影响;然而，1mg / L的Se治疗显着提高了生长速率并提高了幼苗的耐盐性。通过降低对具有较高水平的类胡萝卜素和非光化学猝灭（NPQ）的光学系统II（PSII）（PSII）（F-V / F-M）的最大量子产率（F-V / F-M）的损害效果降低了损害效应来获得这种耐受性增加的耐受性。作为对PSII功能调节的证据的性能指数（PIABS）被盐胁迫下调;虽然SE减轻了这种效果。此外，通过改善叶片的激发能量捕获（TR0 / CS）和电子传输（ET0 / CS），ojip瞬变的分析表明SE降低了对PSII函数的耐腐蚀效应。荷兰芹幼苗的芽和根中的Na浓度显着增强了NaCl治疗后。有趣的是，通过限制Na的根对易转位和从细胞液中排除Na，以及从细胞液中排除，以及从细胞液中排除，以及从细胞液中排除Na和Ca / Na的保留，治疗盐胁迫植物的治疗降低了芽中的Na含量。以及K / Na和Ca / Na比率。这些数据提供了通过增强PSII功能并通过将Na与根部细胞壁的结合减少芽中的Na含量来减轻盐度应力的第一种证据。

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