研究微囊藻群体的形成与维持机制，对阐明蓝藻水华发生机制具有重要的理论意义。根据我们前期研究结果，水体中异养细菌与微囊藻水华的生消和微囊藻群体的形成密切相关。为了进一步研究水体微生物在其中的作用机理，本项目将通过采集不同湖泊中的群体微囊藻，研究不同种类微囊藻与其附生细菌群落间的相关关系；筛选出能诱导单细胞微囊藻形成群体的典型微生物；并通过营养传递与信号传导来研究其相互作用关系，阐明水体微生物在微囊藻形成过程中的作用机理，并探讨不同种类的微囊藻是否存在其对应附生细菌。本研究的开展，不仅有助于了解富营养水体中藻菌相互作用关系及蓝藻水华生消机制的理论问题，同时对微囊藻的种类分类提供新的思考。

Understanding the causal mechanisms of cyanobacterial blooms in aquatic ecosystems could advance future practical strategies to mitigate algal blooms. Based on our previous studies, specific heterotrophic bacteria were closely related to the occurrence and disappearance of Microcystis blooms and colony formation. In order to clarify the role of bacteria in mechanisms of Microcystis colony formation, we plan to study the relationship between different species of Microcystis and their associated bacterial communities and identify specific bacteria which can induce unicellular Microcystis to aggregate into colonial Microcystis. By isolating colonial Microcystis from lakes of different trophic status, we can compare bacterial communities among a range of trophic and nutrient conditions. The focus of this experiment is nutrient exchange and cell signaling between Microcystis and the associated bacteria community. The experimental techniques in this experiment include fluorescence in situ hybridization to test if specific bacteria are associated with the occurrence with Microcystis blooms. The proposed study design will help gain a better understanding of cyanobacteria-aquatic bacteria interactions and provide new idea for Microcystis species classification..