文献类型： 外文期刊

第一作者： Zhang, Yong-Ping

作者： Zhang, Yong-Ping;Shen, Hai-Bin

作者机构：

关键词： chlorophyll content; crop growth; Cucumis melo; exogenous substance; soluble sugar

期刊名称：HORTSCIENCE （ 影响因子：1.874； 五年影响因子：1.921 ）

ISSN： 0018-5345

年卷期： 2022 年 57 卷 10 期

页码：

收录情况： SCI

摘要： The objective of the present study was to consider the regulatory role of exoge-nous nitric oxide (NO) supplementation in response to chilling stress impose alterations on different physiological parameters in melon seedlings. Melon seedlings were treated with sodium nitroprusside (SNP, an NO donor), hemoglobin (a NO scavenger), N-G-nitro-L-arginine methyl ester (an NO synthase inhibitor), and tungstate (a nitrite reductase inhibitor) under chilling stress conditions. The results showed that exogenous SNP im-proves the growth of melon seedlings under chilling stress conditions and ameliorates the harmful effects of chilling stress by increasing the levels of chlorophyll and soluble solutes, elevating the activity of sucrose phosphate synthase by enhancing the expression level of CmSPS. Moreover, exogenous NO significantly enhances the expression of genes and activities of antioxidant enzymes under chilling stress, resulting in lower reactive oxygen species accumulation. However, the protective effects of SNP are reversed by both NO scavenging and inhibition. Collectively, our results reveal that NO has the ability to ameliorate the harmful effects of chilling stress on melon seedlings by regulating carbohydrate metabolism and the antioxidant defense system.

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