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BIO-03  Diversity of marine host-associated microbiomes
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Differentiation and environmental adaptation of Prochlorococcus high-light-adapted clade II
Xuejin Feng* , State Key Laboratory of Marine Environmental Science, College of Ocean and Earth Sciences, Institute of Marine Microbes and Ecospheres, Xiamen University, PR China
Wei Yan, State Key Laboratory of Marine Environmental Science, College of Ocean and Earth Sciences, Institute of Marine Microbes and Ecospheres, Xiamen University, PR China
Nianzhi Jiao, State Key Laboratory of Marine Environmental Science, College of Ocean and Earth Sciences, Institute of Marine Microbes and Ecospheres, Xiamen University, PR China
Rui Zhang, State Key Laboratory of Marine Environmental Science, College of Ocean and Earth Sciences, Institute of Marine Microbes and Ecospheres, Xiamen University, PR China |
Prochlorococcus is the one of most abundant oxygenic photosynthetic microorganisms on Earth. The high-light-adapted clade II (HLII) is the most abundant Prochlorococcus ecotype. However, the genomic and ecological basis of Prochlorococcus HLII in the marine environment has remained elusive. Here, we show that the differentiation of diverse subclades underlies the ubiquity and distribution of Prochlorococcus HLII in the marine environment. We analyzed the genomic characteristics of 67 different Prochlorococcus HLII strains by using core and accessory genes. Our study suggests that the diverse subclades of Prochlorococcus HLII distributed environment by using the TARA Oceans metagenome and meta transcriptome database. The distribution of three major subclade groups, including the surface group (HLII-SG), the transition group (HLII-TG), and the deep group (HLII-DG), are associated with different temperature and depth ranges. Our results suggest that subclade genome differentiation has played an important role in the evolution and ecological niche partitioning of Prochlorococcus HLII.
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