Abstract：
The rhizosphere system of plants hosts a diverse consortium of bacteria that confer beneficial effects on plant, such as plant growth-promoting rhizobacteria (PGPR), biocontrol agents with disease-suppression activities, and symbiotic nitrogen fixing bacteria with the formation of root nodule. Efficient colonization in planta is of fundamental importance for promoting of these beneficial activities. However, the process of root colonization is complex, consisting of multiple stages, including chemotaxis, adhesion, aggregation, and biofilm formation. The secondary messenger, c-di-GMP (cyclic bis-(3\'-5\') dimeric guanosine monophosphate), plays a key regulatory role in a variety of physiological processes. This paper reviews recent progress on the actions of c-di-GMP in plant beneficial bacteria, with a specific focus on its role in chemotaxis, biofilm formation, and nodulation.
摘要：
植物的根际系统拥有多样化的细菌群，对植物产生有益的影响，如植物生长促进根际细菌（PGPR），具有疾病抑制活性的生物控制剂，与根瘤形成共生的固氮菌。在植物中的有效定殖对于促进这些有益活动至关重要。然而,根定植的过程是复杂的，由多个阶段组成，包括趋化性,附着力,聚合，和生物膜的形成。第二信使,c-di-GMP（环双-（3'-5'）二聚磷酸鸟苷），在多种生理过程中起着关键的调节作用。本文综述了近年来c-di-GMP在植物有益菌中的作用,特别关注它在趋化性中的作用，生物膜的形成，和结瘤。
