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Taxonomic structure and function of seed-inhabiting bacterial microbiota from common reed (Phragmites australis) and narrowleaf cattail (Typha angustifolia L.).
Archives of Microbiology 2018 August
The present study investigated the endophytic bacterial communities in the seeds of mature, natural common reed (Phragmites australis) and narrowleaf cattail (Typha angustifolia L.). Additionally, seed endophytic bacterial communities were compared with rhizospheric and root endophytic bacterial communities using Illumina-based sequencing. Seed endophytic bacterial communities were dominated by Proteobacteria (reed, 41.24%; cattail, 45.51%), followed by Bacteroidetes (reed, 12.01%; cattail, 10.41%), Planctomycetes (reed, 10.36%; cattail, 9.09%), Chloroflexi (reed, 8.72%; cattail, 6.45%), Thermotogae (reed, 5.43%; cattail, 6.11%), Tenericutes (reed, 3.63%; cattail, 3.97%) and Spirochaetes (reed, 3.32%; cattail, 3.90%). The dominant genera were Desulfobacter (reed, 8.02%; cattail, 8.96%), Geobacter (reed, 2.74%; cattail, 2.81%), Thiobacillus (reed, 2.71%; cattail, 2.41%), Sulfurimonas (reed, 2.47%; cattail, 2.31%), Methyloversatilis (reed, 2.29%; cattail, 2.05%) and Dechloromonas (reed, 1.13%; cattail, 1.48%). Obvious distinctions were observed among the respective rhizospheric, root endophytic and seed endophytic bacterial communities. Principal coordinate analysis with weighted UniFrac distance and the heat map analysis demonstrated that the seed endophytic bacterial communities were distinct assemblages rather than a subgroup of rhizobacterial communities or root endophytic bacterial communities. These results provide new information regarding endophytic bacteria associated with seeds of wetland plants and demonstrate a variety of genera that have a strong potential to enhance phytoremediation in the wetland ecosystem.
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