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Bull Entomol Res


Title:"Exogenous salicylic acid improves resistance of aphid-susceptible wheat to the grain aphid, Sitobion avenae (F.) (Hemiptera: Aphididae)"
Author(s):Feng JL; Zhang J; Yang J; Zou LP; Fang TT; Xu HL; Cai QN;
Address:"College of Plant Protection, China Agricultural University, Beijing 100193, China. MOA Key Laboratory of Crop Pest Monitoring and Green Control, College of Plant Protection, China Agricultural University, Beijing 100193, China"
Journal Title:Bull Entomol Res
Year:2021
Volume:20210405
Issue:5
Page Number:544 - 552
DOI: 10.1017/S0007485321000237
ISSN/ISBN:1475-2670 (Electronic) 0007-4853 (Linking)
Abstract:"Salicylic acid (SA), a phytohormone, has been considered to be a key regulator mediating plant defence against pathogens. It is still vague how SA activates plant defence against herbivores such as chewing and sucking pests. Here, we used an aphid-susceptible wheat variety to investigate Sitobion avenae response to SA-induced wheat plants, and the effects of exogenous SA on some defence enzymes and phenolics in the plant immune system. In SA-treated wheat seedlings, intrinsic rate of natural increase (rm), fecundity and apterous rate of S. avenae were 0.25, 31.4 nymphs/female and 64.4%, respectively, and significantly lower than that in the controls (P < 0.05). Moreover, the increased activities of phenylalanine-ammonia-lyase, polyphenol oxidase (PPO) and peroxidase in the SA-induced seedlings obviously depended on the sampling time, whereas activities of catalase and 4-coumarate:CoA ligase were suppressed significantly at 24, 48 and 72 h in comparison with the control. Dynamic levels of p-coumaric acid at 96 h, caffeic acid at 24 and 72 h and chlorogenic acid at 24, 48 and 96 h in wheat plants were significantly upregulated by exogenous SA application. Nevertheless, only caffeic acid content was positively correlated with PPO activity in SA-treated wheat seedlings (P = 0.031). These findings indicate that exogenous SA significantly enhanced the defence of aphid-susceptible wheat variety against aphids by regulating the plant immune system, and may prove a potential application of SA in aphid control"
Keywords:Animals Aphids/*drug effects/growth & development Plant Leaves/chemistry Salicylic Acid/*pharmacology Seedlings Triticum/enzymology/immunology/*parasitology Defence-related enzymes Sitobion avenae Triticum aestivum phenolic acid salicylic acid;
Notes:"MedlineFeng, Jian-Lu Zhang, Jie Yang, Jun Zou, Ling-Ping Fang, Ting-Ting Xu, Huan-Li Cai, Qing-Nian eng England 2021/04/06 Bull Entomol Res. 2021 Oct; 111(5):544-552. doi: 10.1017/S0007485321000237. Epub 2021 Apr 5"

 
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