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Metagenomic surveillance reveals different structure and function of microbial community associated with mangrove
Varsha Bohra1, Kaze King-Yip Lai2, Kit-Ling Lam1
1School of Science and Technology, Hong Kong Metropolitan University, Hong Kong.
Abstract:
Present research employed metagenomics to explore the structural and functional diversity of microorganisms in two matrices of pneumatophore: adhered sediments (PS) and epiphytes (PE) of Avicennia marina. These were compared with microorganisms in surrounding environments: tidal water (TW), mudflat sediment (MF) and mangrove sediment (MS). Results revealed that bacteria made up over 95 % of the microbial community across all five matrices, with the dominance of phylum Proteobacteria, because of their metabolic flexibility and ability to survive in harsh mangrove environment. The bacterial community in PS and PE were similar to TW but differed from those in MF and MS, implying their provenance from TW. The high relative abundance of genes involved in nitrate and sulfur reduction pathways in PS and PE indicates pneumatophore bacteria helps in enhancing nitrogen and sulfur availability. This study is the first to explore the functional significance of pneumatophore-adhered prokaryotic communities using metagenomics.
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