数字农科院2.0

Salicylic-Acid-Induced Chilling- and Oxidative-Stress Tolerance in Relation to Gibberellin Homeostasis, C-Repeat/Dehydration-Responsive Element Binding Factor Pathway, and Antioxidant Enzyme Systems in Cold-Stored Tomato Fruit

文献类型： 外文期刊

作者： Ding, Yang;Zhao, Jinhong;Nie, Ying;Fan, Bei;Wu, Shujuan;Zhang, Yu;Tang, Xuanming;Sheng, Jiping;Shen, Lin;Zhao, Ruirui

作者机构：

关键词： tomato fruit;chilling tolerance;salicylic acid;gibberellin homeostasis;CBF pathway;antioxidant enzyme systems

期刊名称： JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY

ISSN：

年卷期：

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收录情况： SCI

摘要： Effects of salicylic acid (SA) on gibberellin (GA) homeostasis, C-repeat/dehydration-responsive element binding factor (CBF) pathway, and antioxidant enzyme systems linked to chilling- and oxidative-stress tolerance in tomato fruit were investigated. Mature green tomatoes (Solanum lycopersicum L. cv. Moneymaker) were treated with 0, 0.5, and 1 mM SA solution for 15 min before storage at 4 degrees C for 28 days. In comparison to 0 or 0.5 mM SA, 1 mM SA significantly decreased the chilling injury (CI) index in tomato fruit. In the SA-treated fruit, the upregulation of GA biosynthetic gene (GA3ox1) expression was followed by gibberellic acid (GA(3)) surge and DELLA protein degradation. CBF1 participated in the SA-modulated tolerance and stimulated the expression of GA catabolic gene (GA2ox1). Furthermore, 1 mM SA enhanced activities of antioxidant enzymes and, thus, reduced reactive oxygen species accumulation. Our findings suggest that SA might protect tomato fruit from CI and oxidative damage through regulating GA metabolism, CBF1 gene expression, and antioxidant enzyme activities.

分类号： R15`S

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