摘要
该文对松材线虫病的致病机制的研究进行了概述。目前对松材线虫病的病原有两种看法 ,一种认为松材线虫是惟一病原 ,另一种认为病原为松材线虫和细菌两种生物。对于松材线虫的致病机理 ,目前存在 3种观点。第 1种观点认为松材线虫的酶使松树薄壁细胞的细胞壁和细胞膜遭到破坏 ,树脂不正常地从树脂道中渗漏并扩散到相邻的管胞中 ,使水分输导受阻 ,导致萎蔫。第 2种观点认为松树感染了松材线虫后 ,木质部内挥发性萜烯类物质的含量增加 ,这些物质进入管胞在管胞中形成空洞 ,致使水分输导受阻。第 3种观点认为松树感染松材线虫后 ,体内产生有毒物质 。
The research about pathogenetic mechanism of PWN was reviewed.Recently there are two different views about the pathogen of PWN disease,PWN only or PWN and bacteria complex.About pathogenetic mechanism of PWN there are 3 opinions.1 st ,The enzymes,especially cellulase,reproduced by PWN destroyed the cell wall and cell membrane of parenchymatous cells.The oleoresin leaked and diffused into tracheids unnormally,caused water deficiency and wilt of pines.2 nd ,After infection of pines with PWN,volatile terpenes increased in xylem tissue.The terpenes came into tracheids,caused cavitation in the tracheids,and the cavitation interrupted water conduction in sapwood.3 rd ,Toxins were produced by pines or bacteria after infection of pines by PWN.These toxins could arouse pine wilt.
出处
《中国森林病虫》
北大核心
2002年第1期27-31,14,共6页
Forest Pest and Disease
