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目前,对外生菌根真菌抑制根部病害的机理了解甚少。根系对病害的拮抗也可能与共生生物或寄主合成的抗真菌物质、根系表面菌丝的屏障效应或对养分的竞争有关。相互矛盾的结论表明,眼下仍无一个可遵循的基本机理。据报道,尽管在离体条件下,90多种外生菌根真菌可以合成抗真菌物质(Marx,1973),但关于外生菌根真菌在自然条件下
At present, little is known about the mechanism of inhibition of root diseases by ectomycorrhizal fungi. The antagonism of the root system to the disease may also be related to antifungal substances synthesized by the symbiont or the host, the barrier effect of the root mycelium on the root system, or competition for nutrients. Conflicting conclusions suggest that there is still no fundamental mechanism to follow. It has been reported that, although more than 90 ectomycorrhizal fungi can synthesise antifungal substances under ex vivo conditions (Marx, 1973), the ectomycorrhizal fungi, under natural conditions