共生真菌对植物抗旱性的影响及机制研究进展

The effects of symbiotic fungi on plant drought resistance and mechanisms

共生真菌分布广泛,与植物形成共生体。研究表明,某些共生真菌可以增强植物对生物胁迫和非生物胁迫,包括干旱、高温、矿物质失调和高盐的耐受性,从而使被内生真菌感染的植株比未感染植株对有限的资源更具竞争力而且生长得更好。植物共生真菌可以通过多样化途径来增强植物体的抗性机能,其提高抗旱性的机制主要表现在营养物质的吸收、植物的保护系统、激素调节、水解酶、水分代谢、相关基因表达、植物防御信号途径等方面。总结共生真菌提高植物耐旱性的机制研究进展,以使读者能全面、及时地了解这一领域的研究动态。

This article reviews the research on the effects of symbiotic fungi on plant drought resistance.Symbiotic fungi are widely distributed,which can form symbionts with plants.Studies have shown that some endophyte and symbiotic fungi can enhance plant′s biological and non-biological stress tolerance,including drought,high temperature,mineral disorder and high salt.The plants infected by symbiotic fungi are more competitive than uninfected plants to the limited resources and grow better.Symbiotic fungi can enhance the resistance tolerance of plants through diverse channels.The mechanisms of improving the drought resistance mainly related to the absorption of nutrients,plants protection systems,hormonal regulations,hydrolytic enzymes,water metabolisms,related gene expressions,plants defense signal pathways,etc.This paper summarized the mechanism research progress of symbiotic fungi on improving plant drought resistance,which gave readers a comprehensive and updated information in this field.