Study of the Diversity of Exopolysaccharide-producing Bacteria in South China Sea and the Bioavailability of Representative Bacterial Exopolysaccharide
海洋溶解有机物质(DOM)在海洋碳的生物地球化学循环中占有重要地位。储存在DOM中的碳可以与大气中的CO2相当,是海洋最大的有机碳库。海洋细菌生产的胞外多糖(EPS)是高分子量的糖类聚合物,是重要的DOM成分之一。EPS不仅为微生物提供适于其生存活的微环境,同时参与海洋中各个生物化学过程,对海洋物质与能量循环具有重要生态意义。海洋细菌普遍具有合成分泌胞外多糖的能力,然而海洋细菌生产的EPS对DOM的贡献尚不明确。关于EPS生产菌株的报道目前主要集中在从极地、热泉、冷泉等极端环境地区分离出来的菌株。 本论文调查了南海可培养EPS生产菌的多样性,并初步探究了EPS的生物可利用性,主要研究内容及结...Dissolved organic matter (DOM) in the ocean is the fundamental part of marine carbon biogeochemical cycles. The amount of carbon stored in the DOM is comparable with that stored in atmospheric CO2, and the DOM pool is the largest organic carbon pool in the ocean. Exopolysaccharides (EPS) produced by marine bacteria are high molecular weight carbohydrate polymers, and it constitutes a large fractio...学位:理学硕士院系专业:环境与生态学院_环境科学学号:2262011115141