title: Salicylhydroxamic acid (SHAM) negatively mediates tea herbivore-induced direct and indirect defense against the tea geometrid Ectropis obliqua.
abstract: We investigated the effect of the SHAM treatment of tea plants on their induced defense on a tea geometrid (TG), Ectropis obliqua Prout. Treatment of tea leaves with SHAM reduced the performance of TG and TG-elicited level of the lipoxygenase gene CsiLOX1 and the putative allene oxide synthase gene CsiAOS1. The release of wound-induced green leaf volatiles (GLVs) and the expression of the hydroperoxide lyase (HPL) gene CsiHPL1 were also reduced by SHAM treatment. The negative effect of SHAM dramatically reduced the total hebivore-induced plant volatiles (HIPVs) and the attractiveness to the parasitoid wasp Apanteles sp. These results indicated that SHAM may negatively mediate tea defense response against TG by modulating the wound-induced emission of GLVs, the expression of genes involved in oxylipin pathway, and the emission of other HIPV compounds that mediate direct and indirect defenses.
authors.affiliation: Tea Research Institute, Chinese Academy of Agricultural Sciences, Hangzhou, 310008, China, xinzhaojun2003@163.com.
authors.forename: Zhaojun
authors.initials: Z
authors.lastname: Xin
authors.forename: Zhengqun
authors.initials: Z
authors.lastname: Zhang
authors.forename: Zongmao
authors.initials: Z
authors.lastname: Chen
authors.forename: Xiaoling
authors.initials: X
authors.lastname: Sun
mesh_terms: D000446:Aldehyde-Lyases / Q000235:genetics; D000818:Animals; D028241:Camellia sinensis / Q000187:drug effects* / Q000201:enzymology / Q000235:genetics / Q000469:parasitology; D003517:Cyclopentanes / Q000378:metabolism; D003577:Cytochrome P-450 Enzyme System / Q000235:genetics; D005260:Female; D020387:Food Chain; D008401:Gas Chromatography-Mass Spectrometry; D018506:Gene Expression Regulation, Plant / Q000187:drug effects; D060434:Herbivory / Q000187:drug effects*; D009036:Moths / Q000469:parasitology / Q000502:physiology*; D054883:Oxylipins / Q000378:metabolism; D018515:Plant Leaves / Q000187:drug effects / Q000201:enzymology; D010940:Plant Proteins / Q000235:genetics / Q000378:metabolism; D060888:Real-Time Polymerase Chain Reaction; D012457:Salicylamides / Q000494:pharmacology*; D015398:Signal Transduction; D055549:Volatile Organic Compounds / Q000378:metabolism; D014863:Wasps / Q000502:physiology
chemical_list: D003517:Cyclopentanes; D054883:Oxylipins; D010940:Plant Proteins; D012457:Salicylamides; D055549:Volatile Organic Compounds; C011006:jasmonic acid; C005703:salicylhydroxamic acid; D003577:Cytochrome P-450 Enzyme System; D000446:Aldehyde-Lyases; C054540:hydroperoxide lyase