Diversity of sediment‐associated Planctomycetes in the Arabian Sea oxygen minimum zone

Abstract

We examined the diversity of Planctomycetes in the sediment sample collected from an oxygen minimum zone (OMZ) in the southeast Arabian Sea. A 16SrRNA gene library was constructed using the forward primer specific for Planctomycetes and a universal reverse primer. The 237 sequences obtained were grouped into 130 operational taxonomic units, and the majority of them were clustered with phylum Planctomycetes (45.0%) and unclassified bacteria (27.0%). There were sequences that clustered with distantly separated monophyletic groups such as Latescibacteria (9%), Actinobacteria (6%), Proteobacteria (5%), and others (8%). Among Planctomycetes, 55.7% belonged to family Planctomycetaceae, followed by unclassified Planctomycetes (25.0%) and family candidatus Brocadiaceae (19.2%). The family Planctomycetaceae included the genera Blastopirellula (11.5%), Rhodopirellula (3.8%), and a large number unclassified Planctomycetaceae sequences (40.4%). The members of family candidatus Brocadiaceae included the genera candidatus Scalindua (11.5%), candidatus Brocadia (1.9%) and unclassified genera (5.8). Our study indicates the relatively large diversity of Planctomycetes in sediments underlying the oxygen minimum zone of Arabian Sea. Also, the sequence data generated in the present study may support the efforts on isolation and purification of Planctomycetes from marine environment for understanding their biogeochemical significance.

Diversity of the microbial community and cultivable protease-producing bacteria in the sediments of the Bohai Sea, Yellow Sea and South China Sea

“…At the phylum level, Proteobacteria and Planctomycetes were the most dominant phyla in the three China Seas; bacteria in these phyla play an important role in the marine nitrogen cycle. Proteobacteria play a vital role in degrading sedimentary organic nitrogen [7, 9], while Planctomycetes are proposed to exhibit unique biogeochemical properties like anaerobic ammonium oxidation [34], methane oxidation [35], and participation in carbon recycling [36]. Chloroflexi and Cyanobacteria appeared to be more aboundant in the SCS than in the BHS and YS.…”

Holocene paleodepositional changes reflected in the sedimentary microbiome of the Black Sea

“…Caldicellulosiruptor is cellulolytic and xylolytic (Huang, Patel, Mah, & Baresi, 1998) while Thermoaenerobacter is saccharolytic (Xue, Xu, Liu, Ma, & Zhou, 2001). In the same sediment section, facultative Spirochaeta and Planctomycetes also dominated (Figure 3d), both of which have been isolated from aquatic sediments and are known to degrade carbohydrates (Jasmin et al, 2017;Subhash & Lee, 2017).…”

Prokaryotic Diversity and Composition of Sediments From Prydz Bay, the Antarctic Peninsula Region, and the Ross Sea, Southern Ocean

“…Planctomycetes are characterized by a wide distribution in most marine environments (Fuerst, 1995;Polymenakou et al, 2009) and catalyze important transformations in the global carbon and nitrogen cycles (Glöckner et al, 1999). Planctomycetes have been proposed to exhibit unique biogeochemical properties such as anaerobic ammonium oxidation (Jasmin et al, 2017), methane oxidation (Bhattacharyya et al, 2017), and participation in carbon recycling (Woebken et al, 2007). Deltaproteobacteria have rarely been detected in abundance in surface waters (Venter et al, 2004), but were frequently encountered in sediments of Prydz Bay, in our result, Deltaproteobacteria was detected in the sediment of all three regions.…”