Verticillium dahliae uses xylanase to destroy plant vessels and exert toxic effects to cause host chlorosis and wilting.
Verticillium dahliae uses xylanase to destroy plant vessels and exert toxic effects to cause host yellowing and wilting.
Plant Physiology According to researcher Dai Xiaofeng, the author of the paper, soil-borne vascular pathogenic fungi invade from the roots of plants and colonize, multiply and damage the vessels.
However, in the field of plant pathology, there are two theories of its damage mechanism, which cannot be convinced by each other, which has become a big unresolved case of the damage mechanism of Verticillium wilt
The study systematically identified and analyzed the xylanase family encoded by Verticillium dahliae, and found that one of the xylanase members (VdXyn4) is involved in the degradation process of xylan, pectin and cellulose (main components of vascular bundles)
Different from the cell necrosis caused by immune response triggered by typical effectors, xylanase relies on immunoreceptor-mediated endocytosis to localize in the chloroplast and nucleus of plant cells, effectively avoiding or delaying plant defense response pathways, leading to petiole Veins and other vascular bundle cells are necrotic
The mechanism of Verticillium dahliae inducing necrosis of vascular bundle cells provides an important theoretical basis for the unresolved "toxin" theory and "blocking" theory of Verticillium dahliae causing symptoms of Verticillium wilt
The research was funded by the National Key Research and Development Program of International Cooperation in Science and Technology Innovation, the National Natural Science Foundation of China, and the Science and Technology Innovation Project of the Chinese Academy of Agricultural Sciences
Related paper information: https://doi.
https://doi.
org/10.
1093/plphys/kiab274
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