慢生单胞菌目是本课题组于2015年建立的一个新目，属于变形细菌门δ变形菌纲，目前只有沉积物慢生单胞菌一个物种。本课题组的研究发现，慢生单胞菌在海洋环境中分布广泛，丰度也比较高，可能具有重要生态功能。本课题研究的主要内容为：一，设计适合于这一新的细菌类群的富集分离方法，分离新的慢生单胞菌菌种资源；二，开展系统分类工作，发表慢生单胞菌1-2个新科，3-5个新属和8-10个新物种，丰富慢生单胞菌的分类体系；三，开展慢生单胞菌生态学特性研究，以沉积物慢生单胞菌及新分离的其他代表性类群为对象，利用网上数据库分析其分布特征；通过比较基因组学分析其有氧及无氧呼吸相关代谢途径并与δ变形菌纲其他类群进行比较；开展慢生单胞菌捕食特性研究，探讨其捕食模式和捕食机制。为发掘这一海洋细菌新类群的应用潜力和深入理解慢生单胞菌在海洋生态系统中的地位与作用奠定基础。

The order Bradymonadales, belonging to the class Deltaproteobacteria of the phylum Proteobacteria, was established by our group in 2015, and contains only one species (Bradymonas sediminis) at present. The analyses by our group indicate that the bradymonabacteria are widely distributed in marine environment with high abundance. They may carry out diverse and important ecological functions. The main contents of this project are as follows: 1. Novel bradymonabacteria strains will be isolated by use of the newly established enrichment culture techniques. 2. Systematic analysis of these new strains will be carried out, and many new taxa in order Bradymonadales will be proposed, include 1-2 novel families, 3-5 novel general and 8-10 novel species. 3. Studies on the ecological characteristics of bradymonabacteria will be carried out. The environmental distributions, abundance and ecogenomics of the bradymonabacteria will be studied. The aerobic and anaerobic respiration metabolisms will be analyzed compared with related taxa. The predatory characteristics of Bradymonas sediminis and other representatively novel species will be determined. These results will shed light on the development of the potential application and understand the position and function of bradymonabacteria in marine ecosystem.