松材线虫病致病机理的研究进展

Research Progress of Pathogenetic Mechanism of Pine Wilt Disease

概述了近年来国内外学者在松材线虫病致病机理研究方面的进展。该病害的致病决定因子主要包括几个理化特性,(1)由线虫食道腺产生的细胞壁水解酶,通过作用寄主细胞壁来帮助线虫侵入、扩散,最终影响寄主水分传输;(2)松材线虫分泌的部分蛋白会参与到与寄主细胞的互作中来;(3)松材线虫本身产生的植物毒素和其携带的细菌分泌的毒素可使寄主松树萎蔫;(4)松材线虫表面蛋白的作用。

This article provided a comprehensive overview of recent advances in the pathogenesis of pine wilt disease by scholars at home and abroad.Several physical and chemical traits have been studied as pathogenicity determinants.First,cell wall-degrading enzymes excreted of pine wood nematode(PWN)are used to help nematode migration by degrading the cell wall of host and thereby broken the water transportation;Second,some excreted proteins by PWN could be involved in nematode-plant interactions;Third,phytotoxins secreted by bacteria that are carried by PWN and toxins produced by PWN are proposed to arouse pine wilt;Fourth,surface coat proteins of PWN play important roles in the pathogenicity of it.