MeJA regulates enzymes involved in ascorbic acid and glutathione metabolism and improves chilling tolerance in loquat fruit
MeJA regulates enzymes involved in ascorbic acid and glutathione metabolism and improves chilling tolerance in loquat fruit
复制标题
MeJA 调节参与抗坏血酸和谷胱甘肽代谢的酶并提高枇杷果实的耐冷性
DOI：
10.1016/j.postharvbio.2010.08.020
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发表时间：
2011-03-01
影响因子：
7
通讯作者：
Zheng, Yonghua
中科院分区：
文献类型：
--
作者：
Cai, Yuting;Cao, Shifeng;Zheng, Yonghua
研究了甲基jamate （MeJA）对枇杷果实抗坏血酸（AsA）和谷胱甘肽代谢及抗寒性的调节作用。结果表明，MeJA通过抑制抗坏血酸氧化酶活性，增强单脱氢抗坏血酸还原酶、脱氢抗坏血酸还原酶和谷胱甘肽还原酶活性，抑制了枇杷果实内褐变（IB）的发生，增加了AsA和谷胱甘肽（GSH）含量。同时，MeJA还增强了抗坏血酸过氧化物酶、谷胱甘肽过氧化物酶和谷胱甘肽s -转移酶的活性。结果表明，MeJA可以调节枇杷果实抗坏血酸和谷胱甘肽代谢，在减轻枇杷果实氧化损伤和增强抗寒性方面具有重要作用。(C) 2010 Elsevier B.V.版权所有
This study investigated the regulation of ascorbate acid (AsA) and glutathione metabolism and chilling tolerance by methyl jamonate (MeJA) in loquat fruit. The results showed that application of MeJA to loquat fruit inhibited the incidence of chilling injury manifested as internal browning (IB) and increased AsA and reduced glutathione (GSH) contents due to the inhibition of ascorbate oxidase activity and enhancement of monodehydroascorbate reductase, dehydroascorbate reductase and glutathione reductase activities. Meanwhile, MeJA also enhanced activities of ascorbate peroxidase, glutathione peroxidase and glutathione-S-transferase. Our results suggested that MeJA can regulate the ascorbate and glutathione metabolism and has important roles in alleviating oxidative damage and enhancing chilling tolerance in loquat fruit. (C) 2010 Elsevier B.V. All rights reserved.