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首页> 美国卫生研究院文献>Physiology and Molecular Biology of Plants >Impact of postharvest exogenous γ-aminobutyric acid treatment on cucumber fruit in response to chilling tolerance
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Impact of postharvest exogenous γ-aminobutyric acid treatment on cucumber fruit in response to chilling tolerance

机译：耐冷性对采后外源γ-氨基丁酸处理对黄瓜果实的影响

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摘要

Low-temperature storage is generally used to extend postharvest lifetime and to inhibit decay of cucumber fruit, but it also enhances the intensity of chilling injury. The capability of γ-aminobutyric acid to enhance antioxidant enzyme activities and reduce chilling injury was studied in cucumber (Cucumis sativus L.) fruit stored at 1 °C for 5 weeks. The purpose of this study was to define if the GABA-induced modification in antioxidant system and phospholipase activity is linked to the reduced chilling injury in cold-stored cucumber fruit. Alleviation of chilling injury by GABA treatment was related to increased content of proline, endogenous GABA and enhanced activities of CAT and SOD, together with reduced activities of PLC, PLD and LOX. We suggest that PLC, LOX and PLD are associated with chilling injury initiation by involvement in a signaling pathway and membrane deterioration. Therefore the results obtained in this study suggest GABA’s potential for postharvest applications for reducing chilling injury symptom in cucumber fruit.
机译：低温储存通常用于延长收获后的寿命并抑制黄瓜果实的腐烂，但同时也增加了冷害的强度。研究了在1°C下保存5周的黄瓜（Cucumis sativus L.）水果中γ-氨基丁酸增强抗氧化酶活性和减少冷害的能力。本研究的目的是确定GABA诱导的抗氧化系统修饰和磷脂酶活性是否与冷藏黄瓜果实的冷害减少有关。 GABA处理减轻的冷害与脯氨酸含量，内源性GABA含量增加以及CAT和SOD活性增强，以及PLC，PLD和LOX活性降低有关。我们认为，PLC，LOX和PLD通过参与信号传导途径和膜变质与发冷损伤有关。因此，本研究获得的结果表明，GABA在采后应用中具有减轻黄瓜果实冷害症状的潜力。

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