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Signals induced by exogenous nitric oxide and their role in controlling brown rot disease caused by Monilinia fructicola in postharvest peach fruit

文献类型： 外文期刊

作者： Shi, Jing Ying 1 ; Liu, Na 1 ; Gu, Rong Xin 2 ; Zhu, Li Qin 3 ; Zhang, Chang 1 ; Wang, Qing Guo 1 ; Lei, Zhong Hua 1 ; Li 1 ;

作者机构： 1.Shandong Agr Univ, Coll Food Sci & Engn, Tai An 271018, Shandong, Peoples R China

2.Jiangsu Acad Agr Sci, Inst Agroprod Proc, Nanjing 210014, Jiangsu, Peoples R China

3.Jiangxi Agr Univ, Coll Food Sci & Engn, Nanchang 330045, Jiangxi, Peoples R China

关键词： Nitric oxide;Peach fruit;Brown rot disease;Signals;Defense response

期刊名称：JOURNAL OF GENERAL PLANT PATHOLOGY （ 影响因子：1.449； 五年影响因子：1.416 ）

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收录情况： SCI

摘要： Recent evidence suggests that nitric oxide (NO) signaling plays an important role in plant-pathogen interactions and that aconitase is a major target of NO. In the present study on the signaling role of NO in the elicitation of defense responses in peach fruit against Monilinia fructicola and subsequent effect on brown rot disease, 15 mu M NO solution induced disease resistance in harvested peaches. As a potentiated elicitor, NO induced high levels of endogenous NO and superoxide (O-2 (-)), hydrogen peroxide (H2O2), and NADPH oxidase and Ca2+-ATPase activity in the fruit. Aconitase activity in peach fruit was inhibited by NO. Activity of partially purified aconitase was inhibited in vitro by sodium nitroprusside (SNP) and H2O2; however, the inhibition could be relieved by carboxy-2-phenyl-4,4,5,5-tetramethylimidazoline-1-oxyl 3-oxide (cPTIO) or catalase (CAT), indicating that the defense response and signals induced by NO transduction depend on aconitase and conditions leading to elevated levels of NO; otherwise, H2O2 would inactivate aconitase directly in fruit. Treatment with NO resulted in salicylic acid (SA) accumulating during storage. Higher levels of jasmonic acid (JA) were detected in NO-treated fruit 48 h after the treatment. But after NO was removed, the level of SA and JA were lower than in the control. The results suggest that exogenous NO enhances resistance of harvested peach fruit against the fungus by inducing signals such as endogenous NO, reactive oxygen species (ROS), SA and JA and by inhibiting aconitase activity.

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