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首页> 外文期刊>Indian Journal of Ecology >Effects of Short and Long Term Salinity Stress on Physiological and Oxidative Metabolism in Chickpea (Cicer arietinum) and Its Possible Alleviation by Nitric Oxide
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Effects of Short and Long Term Salinity Stress on Physiological and Oxidative Metabolism in Chickpea (Cicer arietinum) and Its Possible Alleviation by Nitric Oxide

机译：短期盐度胁迫对鹰嘴豆（Cicer Arietinum）生理氧化代谢的影响及其减轻一氧化氮

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摘要

The present study investigates the effect of both long and short term salinity stress in chickpea plants and the protective effect of exogenously applied nitric oxide (NO). Sodium nitroprusside (SNP) used as NO donor. Salinity treatments given beforesowing were termed as long term stress and thirty days after germination as short term stress. Sodium nitroprusside was given as foliar spray 30 days after germination to both long and short term salinity treated plants. Increased in membrane injury %, ROS content and lipid peroxidation levels were observed under salinity stress. Sodium nitroprusside treatments decreased ion leakage and lipid peroxidation levels significantly. Salinity stress resulted in induction of antioxidatve enzymes but induction was more under short term salinity stress as compared to long term salinity stress. Nitric oxide showed its positive effect by further increasing the activities of antioxidant enzymes. Salinity stress also altered the level of antioxidant metabolites by reducing the ascorbate redox ratio (ASC/DHA) and glutathione redox ratio (GSH/GSSG). No donor treatments increased the redox ratios and showed its positive effects. Seed yield also decreased under salinity stress with more reduction under long term salinity than short term salinity. Nitric oxide had a positive effect on seed yield and biomass accumulation. On the basis of above studies, it is proposed that short term salinity stress resulted in a greater increase in membrane injury (%), malondialdehyde (MDA), reactive oxygen species and hydrogen peroxide content as compared to long term salinity stress. It activated the antioxidant defense system more pronouncedly, resulting in a lesser oxidative stress and a smaller decline in plant yield. However, long term salinity stress had a lesser effect on antioxidant defense system, thus leading to a higher oxidative stress and ultimately a higher decline in plant yield.
机译：本研究调查了长期盐度胁迫对鹰嘴豆植物的影响和外源应用一氧化氮（NO）的保护作用。硝普钠（SNP）不含供体。作为短期应激萌发后，施用盐度处理被称为长期应激和30天的时间。在萌发后30天给予亚硝冻钠，以长期盐度处理植物30天给出。在膜损伤中增加，在盐度应力下观察到ROS含量和脂质过氧化水平。硝酸钠处理显着降低离子泄漏和脂质过氧化水平。与长期盐度应力相比，盐度应力导致诱导抗氧化酶但诱导更短呼吸道胁迫。通过进一步增加抗氧化酶的活性，一氧化氮显示其阳性效果。通过降低抗坏血酸氧化还原比（ASC / DHA）和谷胱甘肽氧化还原比（GSH / GSSG），盐度应力也改变了抗氧化代谢物的水平。没有供体治疗增加氧化还原比率并显示其积极作用。种子产量在盐度胁迫下也减少，在长期盐度下比短期盐度更低。一氧化氮对种子产量和生物质积累具有阳性作用。在上述研究的基础上，提出了与长期盐度胁迫相比，短期盐度胁迫导致膜损伤（％），丙二醛（MDA），反应性氧物质和过氧化氢含量的增加。它激活了抗氧化防御系统更明显，导致氧化应激较小，植物产量下降较小。然而，长期盐度应激对抗氧化防御系统的影响较小，从而导致氧化应激更高，最终植物产量的下降较高。

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