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Introduction
Published in Francisco Javier Rubio Rincon, Effect of Sulphide on Enhanced Biological Phosphorus Removal, 2017
Recently, a new organism capable to store phosphorus beyond their growth requirements was detected in the cost of Namibia (Thiomargarita namibiensis). Schulz et al. (2005) suggested that Thiomargarita namibiensis was one of the organisms responsible to form phosphorite deposits in marine sediments. They observed that, during anaerobic conditions, Thiomargarita namibiensis used their internal storage pools of nitrate and phosphate to oxidize sulphide into sulphur and store poly-sulphur (Poly-S). While acetate triggered this anaerobic metabolism, it was not possible to observe any PHA inclusion and instead they suggested that acetate was stored as glycogen. During the presence of an electron acceptor, Thiomargarita namibiensis generate energy from Poly-S and glycogen to replenish their storage pools of poly-phosphate (Poly-P) (Schuler, 2005).
Bacterial diversity in phosphorus immobilization of the South China Sea
Published in Environmental Technology, 2020
Min Qin, Xiaotian Wang, Li Jiang, Nan Wu, Weizhi Zhou
Marine microbes play significant roles in global P cycle. On the one hand, microbes participated in P cycle with population structure and metabolic activity, affecting the water quality of overlying water [7]. On the other hand, P in the overlying water was transferred to sediment by natural sedimentation and seasonal remixing, which provide nutrition for microorganisms. Furthermore, the previous studies demonstrated that assimilation and remineralization of P in the ocean were primarily depended on microorganisms [8–10]. For instance, bacteria Shewanella sp. CF8-6 assimilated P which mainly was stored in EPS, and P was used to form phospholipid nanoparticles which were bioavailable and easily mobilizable [11]. Pseudomonas, Acinetobacter called inorganic P-accumulating marine bacteria participated in phosphorite formation [12], and sulfide-oxidizing bacteria (Beggiatoa, Thiomargaritanamibiensis) that inhabit the marine sediment were also involved in phosphorite formation [13–16]. To sum up, the basic processes of marine microbial P cycle include P uptake, P assimilation, organic P remineralization and phosphate (PO43–) release to sustain cycle [10].