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Regulation of ethylene biosynthesis and signal transduction by nitric oxide leading to resistance against Alternaria alternata in Hami melon

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文献类型：外文期刊

作者： Wei, Jia ¹ ; Zhang, Zheng ² ; Zhang, Ping ¹ ; Wu, Bin ¹ ;

作者机构： 1.Xinjiang Acad Agr Sci, Inst Agroprod Storage & Proc, Urumqi 830091, Xinjiang, Peoples R China

2.Xinjiang Agr Univ, Coll Forestry & Hort, Urumqi, Xinjiang, Peoples R China

关键词： Hami melon; nitric oxide; ethylene; gene expression; disease resistance

期刊名称：JOURNAL OF THE SCIENCE OF FOOD AND AGRICULTURE （影响因子：4.125；五年影响因子：4.096 ）

ISSN： 0022-5142

年卷期： 2022 年 102 卷 9 期

页码：

收录情况： SCI

摘要： BACKGROUND Hami melons are tasty and nutritive, but susceptibility to the fungus Alternaria alternata is one of the main problems leading to the postharvest loss of this fruit. The purpose of this research was to evaluate the effectiveness of nitric oxide (NO) on regulation of ethylene biosynthesis as well as signal transduction against black spot disease caused by A. alternata in the Hami melon. RESULTS Nitric oxide reduced the growth of lesion diameter and lesion depth in melons inoculated with A. alternata. Ethylene production was significantly inhibited by NO, which was supported by the reduction of 1-aminocyclopropene-1-carboxylate (ACC) synthase (ACS) activity and the deferment of ACC content and ACC oxidase (ACO) activity. Nitric oxide treatment also significantly regulated the expression of four ethylene biosynthesis genes CmACS1, CmACS2, CmACO1, and CmACO2, and eight signal ethylene transduction genes CmETR1, CmETR2, CmCTR1, CmEIN2, CmEIL1, CmEBF1, CmERF1B and CmERF2. The modes of NO regulating these genes can be divided into five categories: promotion (CmEIN2, and CmEIL1), delay (CmACS1, CmETR2, CmCTR1 and CmERF2), up-regulation (CmETR1, CmEBF1 and CmERF1B), down-regulation (CmACS2), and first inhibition and then induction (CmACO1 and CmACO2). CONCLUSION The NO treatment enhanced the postharvest disease resistance of Hami melon attacked by A. alternata, possibly by postponing ethylene biosynthesis and signal transduction. (c) 2021 Society of Chemical Industry.

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