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首页> 外文期刊>Russian Journal of Plant Physiology >Antioxidant enzyme responses to salinity stress of Jatropha curcas and J. cinerea at seedling stage.
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Antioxidant enzyme responses to salinity stress of Jatropha curcas and J. cinerea at seedling stage.

机译：幼苗期麻疯树和灰质镰刀菌对盐分胁迫的抗氧化酶响应。

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摘要

The salt-sensitive humid tropical biodiesel crop, Jatropha curcas, was subjected to a 28-day exposure to salinity (0, 50, 100, and 200 mM NaCl), and activities of antioxidant enzymes, such as superoxide dismutase (SOD), catalase (CAT), and peroxidase (POX), the rate of lipid peroxidation, stomatal conductance, mineral contents, and chlorophyll (Chl) content were compared to corresponding characteristics of J. cinerea, a related wild species of saline-dry areas. Biomass production decreased under the influence of 50 mM NaCl in both species, and the reduction was larger in J. curcas than in J. cinerea at the higher NaCl concentrations. In both species, stomatal conductance and transpiration decreased, leaf temperature and Na+ concentration increased under salt treatment; salinity effect was stronger in J. curcas. Chl degradation was enhanced only in J. curcas. In both Jatropha species, SOD, CAT, and POX activities increased with salinity. J. curcas showed the higher antioxidant activity than J. cinerea. Lipid peroxidation was observed only in J. curcas at concentrations above 100 mM NaCl, partially due to a greater reduction in stomatal conductance and/or the poor ROS-scavenging system. Thus, J. cinerea had more favorable characteristics to adapt to saline environments, and young J. curcas plants could adapt to salt-affected land if soil salinity was moderate (about 50 mM NaCl in solution).
机译：对盐敏感的潮湿热带生物柴油作物麻风树（Jatropha curcas）暴露于盐度（0、50、100和200 mM NaCl）和抗氧化酶（如超氧化物歧化酶（SOD），过氧化氢酶）的活性下28天（CAT）和过氧化物酶（POX），脂质过氧化率，气孔电导率，矿物质含量和叶绿素（Chl）含量与盐渍干燥地区野生物种J. cinerea的相应特征进行比较。在两个物种中，在50 mM NaCl的影响下，生物量产量均下降，而在较高的NaCl浓度下，麻疯树的减少量大于灰葡萄菌。在盐处理下，两个物种的气孔导度和蒸腾作用均降低，叶片温度和Na + 浓度升高;盐碱作用在J. curcas中更强。 Chl降解仅在麻疯树中得到增强。在两种麻风树种中，SOD，CAT和POX活性均随盐度增加而增加。麻疯树显示出比灰葡萄菌更高的抗氧化活性。仅在浓度高于100 mM NaCl的麻疯树中观察到脂质过氧化，部分原因是气孔导度的更大降低和/或较弱的ROS清除系统。因此，灰褐色的J. cinerea具有更好的适应盐碱环境的特性，如果土壤盐度适中（溶液中的NaCl浓度约为50 mM），那么年轻的J. curcas植物就可以适应盐碱地。

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