生态学杂志2024，Vol.43Issue(4)：1141-1151,11.DOI:10.13292/j.1000-4890.202403.014
聚球藻共栖细菌群落结构与功能特征
Community composition and functional characteristics of symbiotic bacteria of Synechococcus
摘要
Abstract
Synechococcus and its phycosphere bacteria can achieve mutualism through functional complementarity.In this study,the functional characteristics and ecological effects of stable symbiotic dominant bacteria were investi-gated by analyzing the differences of community structure and physiological indices of the algal-bacteria system be-fore and after bacteria removal of in situ Synechococcus enrichment culture system.The results showed that Synecho-coccus mainly belonged to S5.1_Ⅷ subgroup,and that the dominant classes of symbiotic bacteria were α-Pro-teobacteria,γ-Proteobacteria,and Bacteroides.After bacteria removal,community structure of recombinant stable symbiotic bacteria tended to be consistent,with Ruegeria and Marianobacter as the dominant populations.The re-sults of function annotation showed that the relative abundance of bacterial groups involved in carbon and nitrogen cycling was 88.47％and 11.08％,respectively.Affected by symbiotic dominant bacterial community,phycobilipro-tein contents and maximum photosynthetic capacity of Synechococcus significantly changed,and light conversion efficiency increased.Furthermore,Synechococcus released large amounts of silicon during cultivation,which may provide ballasting mineral for the aggregation and sinking of pico-phytoplankton and promote marine carbon cycling.关键词
微微型蓝藻/藻际环境/菌藻互作/种群多样性/生态功能Key words
picocyanobacteria/phycosphere/bacteria-algae interaction/population diversity/ecosystem function引用本文复制引用
周玉婷,赵振军,李佳霖,秦松..聚球藻共栖细菌群落结构与功能特征[J].生态学杂志,2024,43(4):1141-1151,11.基金项目
国家自然科学基金项目(42176131)资助. （42176131）
