激发子
茉莉酸甲酯
白粉病
几丁质酶
植保素
苯丙氨酸解氨酶
植物对草食的防御
生物
发病相关蛋白
烟草
茉莉酸
葡萄疟原虫
植物
化学
生物化学
霜霉病
酶
过氧化物酶
茄科
基因
拟南芥
白藜芦醇
突变体
作者
Assia Belhadj,Cassandrine Saigne,Nadège Télef,Stéphanie Cluzet,Jérôme Bouscaut,Marie‐France Corio‐Costet,Jean‐Michel Mérillon
摘要
Grapevine is subject to a number of diseases that affect yield and wine quality. To limit the excessive use of phytochemicals in the vineyard, alternative strategies have to be developed. Plant treatment with signaling molecules like elicitors stimulates their natural defense mechanisms. To improve grapevine tolerance against fungal pathogens, Vitis vinifera plants were treated with a natural exogenous elicitor, methyl jasmonate (MeJA). MeJA-treated leaves (Cabernet Sauvignon foliar cuttings) reacted by increasing transcript levels coding pathogenesis-related proteins (acidic class IV chitinase, serine protease inhibitor, polygalacturonase-inhibiting protein, and β-1,3-glucanase) and coding enzymes involved in phytoalexin biosynthesis (one phenylalanine ammonia lyase and one stilbene synthase). This was correlated with the accumulation of stilbenes (antimicrobial compounds). The eliciting activity of MeJA was confirmed by enhanced tolerance of grapevine foliar cuttings and vineyard against powdery mildew (75% and 73%, respectively). On the basis of these original results, MeJA can therefore act as an efficient elicitor in an alternative strategy of grapevine protection. Keywords: Elicitor; powdery mildew; stilbenes; PR proteins; Vitis vinifera
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