摘要
梨黑星病是亚洲梨的主要病害之一.该病是由纳雪黑星病菌(Venturia nashicola)感染所致.V.nashicola主要寄生在亚洲梨叶片表皮细胞壁的果胶质层中.该菌的感染可能主要与分泌的细胞外分泌物质、角质分解酶、过氧化氢和果胶质分解酶有关.而亚洲梨对V.nashicola的抗性可能主要与多聚半乳糖醛酸酶抑制蛋白、多种病程相关蛋白、富亮氨酸重复类受体蛋白激酶等有关.另外,不具直接杀菌能力的系统抗性诱导剂acibenzolar-S-methyl (ASM)在大田试验中对梨黑星病菌有较好控制效果.这与ASM诱导的植物防御反应,包括多聚半乳糖醛酸酶抑制蛋白和几丁质酶等有关.
Abstract
Asian pear scab, caused by Venturia nashicola, is one of the most severe diseases of Asian pear. The extracellular matrix, cutinase, polygalactuonase and hydrogen peroxide, released by infection structures of V. nashicola might play a significant role in the pathogenesis of V. nashicola. Polygalacturonase-inhibing protein, several pathogenesis-related proteins and leucine-rich repeat receptor-like protein kinase might involve in resistance response of pear plants when the plants were challenged by V. nashicola. The non-fungitoxic benzothiadiazole compound acibenzolar-S-methyl (ASM), known as a systemic resistance inducer, had shown high control efficacy against scab on the most important but highly scab-susceptible Japanese pear cv. ' Kousui' in field experiments. Moreover, in inoculation tests on potted pear trees, pretreatment with ASM reduced scab development and potentiated several plant defense responses. Transcripts encoding PGIP and LRPK were both highly promoted after scab inoculation of ' Kousui' leaves pretreated with ASM.
NETL
NSTL
维普
万方数据