期刊
PLANT PATHOLOGY
卷 50, 期 2, 页码 249-257出版社
BLACKWELL SCIENCE LTD
DOI: 10.1046/j.1365-3059.2001.00549.x
关键词
chitinase; onions; passage cells; Sclerotium cepivorum; Trichoderma koningii; white rot
Trichoderma koningii (strain Tr5) grew in the epidermal mucilage of onion roots without entering healthy epidermal tissue. When placed on the epidermis of Sclerotium cepivorum-infected roots, T. koningii colonized epidermal passage cells, with little colonization of other epidermal tissues, then branched and spread throughout the root cortical tissues damaged by enzymes and toxins which diffused ahead of S. cepivorum hyphae, and impeded the path of the infection. When T. koningii colonized infected tissue, many S. cepivorum hyphae became detached at septa, cell walls dissolved and many hyphal apices burst. Contact between hyphae was not necessary for lysis to occur. T. koningii produced two endochitinases (R-f 0.15 and 0.24) and two exo-acting chitinolytic enzymes (R-f 0.46 and 0.62) during degradation of crabshell chitin and S. cepivorum cell walls. The R-f 0.24 and 0.46 proteins were detected when T. koningii colonized S. cepivorum-infected roots and are, likely to be a component of the antagonism process.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据