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首页> 外文期刊>Acta Agronomica Hungarica >Effects of long-term salicylic acid pre-treatment on tomato (Lycopersicon esculentum Mill. L.) salt stress tolerance: changes in glutathione S-transferase activities and anthocyanin contents.
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Effects of long-term salicylic acid pre-treatment on tomato (Lycopersicon esculentum Mill. L.) salt stress tolerance: changes in glutathione S-transferase activities and anthocyanin contents.

机译：水杨酸长期预处理对番茄（Lycopersicon esculentum Mill。L.）盐胁迫耐性的影响：谷胱甘肽S-转移酶活性和花色苷含量的变化。

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摘要

The aim of the present study was to investigate the effect of salicylic acid (SA) pretreatment on the salt stress acclimation of tomato plants (Lycopersicon esculentum Mill. L. cv. Rio Fuego). The antioxidant defence and detoxifying capacity of the tissues were analysed by measuring the accumulation of soluble, non-enzymatic antioxidants (anthocyanins) and the activities of glutathione S-transferases (GSTs) at low (10-7 M) and high (10-4 M) SA concentrations in plants exposed to 100 mM NaCl. GSTs are a diverse group of enzymes that catalyse the detoxification of xenobiotics and other toxic organic compounds, and anthocyanins are among the few endogenous substrates that bind to GSTs and are sequestered to the vacuole. It was found that 10-4 M SA pre-treatment improved the acclimation of tomato to high salinity. SA pre-treatments increased the accumulation of anthocyanins both in the presence and absence of 100 mM NaCl. The extractable GST activity of tissues increased under salt stress in young leaves and roots of the control and in plants pre-treated with 10-4 M SA, while the extractable GST activity in these organs was reduced by 10-7 M SA. It is suggested that elevated GST activity is a prerequisite for successful acclimation to high salinity in tomato plants pre-treated with SA, but it may also be a symptom of tissue senescence.
机译：本研究的目的是研究水杨酸（SA）预处理对番茄植物盐胁迫适应的影响（Lycopersicon esculentum Mill。L. cv。Rio Fuego）。通过测量低（10-7 M）和高（10-4 M）时可溶性非酶抗氧化剂（花色素苷）的积累和谷胱甘肽S-转移酶（GSTs）的活性来分析组织的抗氧化防御和解毒能力。 M）暴露于100 mM NaCl的植物中的SA浓度。 GST是催化异种生物和其他有毒有机化合物解毒的多种酶，而花色苷是与GST结合并被隔离在液泡中的少数内源性底物之一。发现10-4M SA预处理改善了番茄对高盐度的适应。在存在和不存在100 mM NaCl的情况下，SA预处理均会增加花色苷的积累。在盐胁迫下，对照的幼叶和根部以及用10-4 M SA预处理的植物中组织的可提取GST活性增加，而这些器官中的可提取GST活性则降低10-7 M SA。有人提出，提高的GST活性是成功用SA预处理的番茄植物成功适应高盐度的前提，但它也可能是组织衰老的症状。

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