细菌性软腐病菌Dickeya致病机理的研究进展

由Dickeya spp.引起的细菌性软腐病在多种作物和花卉上常造成严重的经济损失,尤其近年来由D.zeae引起的水稻细菌性基腐病和香蕉软腐病,以及由D.solani引起的马铃薯软腐病均造成重大的农业失收,这些问题促进了对该属细菌致病机理的重视和深入研究。同时,Dickeya属细菌基因组序列的发表将进一步加速对这些重要病原微生物的研究。本文旨在对Dickeya属细菌的寄主范围、主要致病因子及其调控系统的研究进展作详细的梳理分析,以明确这一重要领域的研究现状并为从分子水平上阐明Dickeya属病原细菌的致病机理和寄主专化性提供依据。

Research progress in the pathogenic mechanism of Dickeya spp.

Bacterial soft rot diseases caused by Dickeya spp. can result in serious economic losses on a variety of crops and ornamental plants. Recent outbreaks of rice bacterial foot rot and banana soft rot caused by D. zeae, and potato bacterial soft rot diseases caused by D. solani have drawn much attention to the pathogens and promoted further research on their pathogenic mechanisms. Meanwhile, the newly released genome sequences of seve-ral Dickeya spp. strains will substantially facilitate further investigations on the virulence mechanisms of these important bacterial pathogens. In this review paper, we focus on the host range of Dickeya spp., their major pathogenic factors and the related regulatory mechanisms. A clear understanding of the current research status of Dickeya will provide a solid foundation for further elucidation of their pathogenic mechanisms and host specificity.