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  Sclerotinia sclerotiorum and Botrytis cinerea are necrotrophic plant-pathogenic fungi, causing substantial eco
nomic losses on many crops. So far, resistant cultivars against these pathogens are unavailable in most crops. Here, we show that the serine protease CmSp1 of Co
niothyrium minitans, a well-characterized mycoparasite of S. sclerotiorum, co
ntributed to suppressing the petal-mediated infection by S. sclerotiorum in rapeseed. Application of recombinant CmSp1 proteins facilitates the bulk degradation of S. sclerotiorum proteins and inhibits spore germination and hyphal growth of S. sclerotiorum and B. cinerea, thereby preventing the development of both diseases. Stable transgenic rapeseed plants with tissue-specific ex
pression of CmSp1 in flower petals inhibit the petal-mediated infection by both S. sclerotiorum and B. cinerea, and resulting transgenic plants have no adverse effect on other agro
nomic traits. Thus, our findings provide a novel mechanism by which a mycoparasite inhibits fungal pathogens and an enviro
nmentally friendly disease management strategy.
  论文链接:https://www.sciencedirect.com/science/article/pii/S2211124723013025
日期9üa href="//www.sqrdapp.com/news/2023-11-07.html">2023-11-07
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