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首页> 外文期刊>Plant Physiology and Biochemistry >Effects of molybdenum on water utilization, antioxidative defense system and osmotic-adjustment ability in winter wheat (Triticum aestivum) under drought stress
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Effects of molybdenum on water utilization, antioxidative defense system and osmotic-adjustment ability in winter wheat (Triticum aestivum) under drought stress

机译：钼对干旱胁迫下冬小麦水分利用，抗氧化防御系统和渗透调节能力的影响

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摘要

Molybdenum (Mo), as an essential trace element in plants, plays an essential role in abiotic stress tolerance of plants. To obtain a better understanding of drought tolerance enhanced by Mo, a hydroponic trial was conducted to investigate the effects of Mo on water utilization, antioxidant enzymes, nonenzymatic antioxidants, and osmotic-adjustment products in the Mo-efficient '97003' and Moinefficient '97014' under PEG simulated drought stress. Our results indicate that Mo application significantly enhanced P_n, chlorophyll, dry matter, grain yield, biomass, RWC and WUE and decreased T_r G_s and water loss of wheat under drought stress, suggesting that Mo application improved the water utilization capacity in wheat. The activities of antioxidant enzymes such as superoxide dismutase, peroxidase, catalase, ascorbate peroxidase and the contents of non-enzymatic antioxidants content such as ascorbic acid, reduced glutathione, carotenoid were significantly increased and malonaldehyde contents were decreased by Mo application under PEG simulated drought stress, suggesting that Mo application enhanced the ability of scavenging active oxygen species. The osmotic-adjustment products such as soluble protein, proline and soluble sugar were also increased by Mo application under PEG simulated drought stress, indicating that Mo improved the osmotic adjustment ability in wheat. It is hypothesized that Mo application might improve the drought tolerance of wheat by enhancing water utilization capability and the abilities of antioxidative defense and osmotic adjustment. Similarities and differences between the Mo-efficient and Mo-inefficient cultivars wheat in response to Mo under drought stress are discussed.
机译：钼（Mo）作为植物中必需的微量元素，在植物的非生物胁迫耐受性中起着至关重要的作用。为了更好地了解Mo增强的耐旱性，开展了一项水培试验，研究Mo对Mo效率为'97003'和Moinficient'97014的水分利用，抗氧化酶，非酶抗氧化剂和渗透调节产品的影响。在PEG下模拟干旱胁迫。我们的结果表明，钼的施用显着提高了干旱胁迫下小麦的P_n，叶绿素，干物质，籽粒产量，生物量，RWC和WUE，并降低了T_r G_s和水分流失，表明钼的施用提高了小麦的水分利用能力。在PEG模拟干旱胁迫下，钼的施加使超氧化物歧化酶，过氧化物酶，过氧化氢酶，抗坏血酸过氧化物酶等抗氧化酶的活性和抗坏血酸，还原型谷胱甘肽，类胡萝卜素等非酶类抗氧化剂的含量显着增加，丙二醛含量降低。 ，表明钼的施用增强了清除活性氧的能力。在PEG模拟干旱胁迫下，施用钼还增加了可溶性蛋白质，脯氨酸和可溶性糖等渗透调节产物的含量，表明钼提高了小麦的渗透调节能力。据推测，钼的施用可以通过提高水分利用能力以及抗氧化防御和渗透调节能力来提高小麦的抗旱性。讨论了干旱胁迫下钼高效和低效小麦品种对钼响应的异同。

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