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Effect of nitric oxide treatment on chilling injury, antioxidant enzymes and expression of the CmCBF1 and CmCBF3 genes in cold-stored Hami melon (Cucumis melo L.) fruit

文献类型： 外文期刊

作者： Zhang, Ting 1 ; Che, Fengbin 2 ; Zhang, Hui 3 ; Pan, Yan 2 ; Xu, MingQiang 2 ; Ban, Qiuyan 1 ; Han, Ye 1 ; Rao, Jingping 1 ;

作者机构： 1.Northwest A&F Univ, Coll Hort, Yangling 712100, Shaanxi Provinc, Peoples R China

2.Xinjiang Acad Agr Sci, Inst Farm Prod Storage & Proc, Urumqi 830091, Peoples R China

3.Xinjiang Agr Univ, Food & Med Sci Dept, Urumqi 830052, Peoples R China

关键词： Nitric oxide;Hami melon;Chilling injury;Antioxidant enzymes;CmCBF1;CmCBF3

期刊名称：POSTHARVEST BIOLOGY AND TECHNOLOGY （ 影响因子：5.537； 五年影响因子：5.821 ）

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收录情况： SCI

摘要： Short-term exposure to a low concentration of nitric oxide (NO) treatment can prevent or alleviate chilling injury (CI), and extend the postharvest life of various fresh fruits and vegetables. However no research on this topic has been reported for Hami melon fruit. In this study, Hami melon fruit were pretreated with 60 mu L/L NO for 3h at 25 C-circle, and then stored at 1 +/- 0.5 C-circle with a relative humidity (RH) of 75-80% for 49 d. The results showed that NO treatment effectively decreased the CI index and CI incidence, reduced the increases in membrane permeability and malondialdehyde (MDA) content, inhibited superoxide anion (O-2 (center dot)) production rates, reduced H2O2 content, and sustained higher activity of superoxide dismutase (SOD), peroxidase (POD), catalase (CAT) and ascorbate peroxidase (APX) in the rind of Hami melon fruit during storage at 1 +/- 0.5 C-circle. C-repeat/dehydration responsive element (CRT/DRE)binding factors (CBFs) are the best-characterized transcription factors controlling cold-responsive gene expression and cold acclimation. To investigate the molecular regulation of cold resistance by NO treatment in Hami melon fruit, a 639-bp CmCBF1 gene and a 615-bp CmCBF3 gene were identified, and the effect NO on the expression of CmCBF1 and CmCBF3 was measured by RT-qPCR. The results showed that the expression of CmCBF1 and CmCBF3 were induced, the expression of the CmCBF1 and CmCBF3 in NO treated fruit was significantly higher than in control fruit during storage at 1 +/- 0.5 C-circle. These results indicate that NO treatment can alleviate and delay CI in cold-stored Hami melon fruit via enhancing the activities of antioxidant enzymes and up-regulating the expression of CmCBF1 and CmCBF3. (C) 2017 Elsevier B.V. All rights reserved.

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