Program
 
Special Session 9: Microbial ecological processes and marine carbon cycle
 

 
 
1110
The shift of POC and DOC in Synechococcus culture and their associated heterotrophic bacterial community structure variation
Tuesday 10th @ 1110-1130
Room 1
Qiang Zheng* , State Key Laboratory of Marine Environmental Science, Institute of Marine Microbes and Ecospheres, Xiamen University
Yu Wang, State Key Laboratory of Marine Environmental Science, Institute of Marine Microbes and Ecospheres, Xiamen University
Rui Xie, State Key Laboratory of Marine Environmental Science, Institute of Marine Microbes and Ecospheres, Xiamen University
Yanting Liu, State Key Laboratory of Marine Environmental Science, Institute of Marine Microbes and Ecospheres, Xiamen University
Yuyu Liao, State Key Laboratory of Marine Environmental Science, Institute of Marine Microbes and Ecospheres, Xiamen University
Jiayao Lu, State Key Laboratory of Marine Environmental Science, Institute of Marine Microbes and Ecospheres, Xiamen University
Nianzhi Jiao, State Key Laboratory of Marine Environmental Science, Institute of Marine Microbes and Ecospheres, Xiamen University
Presenter Email: zhengqiang@xmu.edu.cn
Synechococcus, an ancient and genetically diverse clade, is ubiquitous in the global ocean and is abundant in both estuarine and coastal waters. Previous studies showed that average 30% of ¡®free-living¡¯ bacteria in the ocean environments were intimately associated with other bacteria at nanometer to micrometer scales using atomic force microscopy. 21-43% of bacteria, including Synechococcus, were conjoint. Such close associations could indicate symbioses; however, they could also be antagonistic, parasitic, neutral, or accidental. Heterotrophic bacteria are also frequently found in purify Synechococcus culture, and they could grow up again even they are inhibited by antibiotics for a short time. That makes them be a good research subject to study their interaction relationship. Marine microbes are in an interacting ecological network. The nutrient and carbon are key factors linking Synechococcus and their heterotrophic bacteria. Conjoined cells, free living cells, secreted polymer by Synechococcus and lytic detritus contribute to the variation of POC and DOC in this system. These processes are important to understand the marine nutrient flux and biogeochemical cycle.