印度梨形孢的多种功能及其应用前景

印度梨形孢是一种可进行纯培养的类菌根真菌,该菌以菌丝体、菌丝卷、分枝或者圆形体的方式定殖于寄主植物根的胞间和胞内。已有研究表明:该菌能促进12科24种植物的生长,并能诱导植物产生系统抗性和提高对逆境胁迫的忍耐性,加快插枝侧根的形成和促进微繁殖植物的硬化。该菌在根分化区定殖的量高于根尖片断的量,在该菌与植物根部早期的识别过程中,涉及多种蛋白,但这些蛋白与真菌的作用方式并不清楚。另外,该菌在寄主植物上的成功生长涉及到了寄主细胞的死亡,但并未引起植物的逆境,而是在根的生长与真菌的繁殖之间达到了很好的平衡。

Piriformospora indica with multiple functions and its application prospects

Piriformospora indica is an axenically cultivable mycoorrhiza-like fungus.The fungus colonizes in host roots intra-and intercellularly in the form of mycelium,hyphal coils,branches or round bodies promoting the plant growth.As demonstrated recently in 12 families and 24 plant species,the fungus re-programs host plants,induces plant systematic resistance,enhances stress tolerance and speed-ups the formation of adventitious root in cuttings as well as improves hardening of the micropropagated plants.In general,P.indica colonizes in the differentiation zone rather than in the apical segment of the roots.Several proteins have been reported to be involved in the early recognition events between plants and fungi.The action mode of these proteins with the fungus still remains unknown.Most interestingly,a successful colonization of P.indica requires host cell death but that does not result in plant stress giving an optimal balance of proliferation of fungus and plant growth.