AM真菌对连作作物根系代谢产物影响的研究进展

Advances in Effects of AM Fungi on Metabolites of Continuous Cropping Roots

近年来,连作问题一直危害着作物的产量和品质。大量研究证明,丛枝菌根(Arbuscular mycorrhizal,AM)真菌与作物根系形成共生的菌根,并通过分泌次级代谢产物抵抗外界环境所带来的侵害。为探究AM真菌在作物调节次级代谢产物中扮演的角色和作用机理,本研究总结了AM真菌对次生代谢产物种类及含量的影响;归纳了AM真菌在生态防御连作问题上的机理,包括次生代谢物质可诱导信号物质产生,连作作物的化感自毒作用和AM真菌促进次生代谢产物增加,缓解连作障碍。最后指出目前存在的问题并对将来的研究方向做了展望。

In recent years, continuous cropping has been a threat to the yield and quality of crop. Researches proved that Arbuscular mycorrhizal（AM） fungi and crop roots formed symbiosis mycorrhiza, and it resisted against the external aggression of environment by secreting secondary metabolites. For detecting the function and mechanism of action on AM fungi in crops regulating secondary metabolites, the effects of AM fungi on the types of secondary metabolites and contents were summarized. The mechanism of AM fungi in ecological defense continuous cropping was concluded, including secondary metabolites inducing signaling substances forming, allelopathic autotoxicity of continuous cropping crops, and AM fungi promoting the increase of secondary metabolites and relieve continuous cropping obstacle. At last, current problems in the research were pointed out and future research direction was proposed.