Microbial Transformations of Other Elements

摘要: Microbial sulphur metabolism has a considerable impact on the biosphere by converting S to forms appropriate for growth of cells, producing significant quantities an electron acceptor (SO 4 2- ) that can be used as important sink under anoxic conditions, and contributing certain geochemical processes (7.7). involves both oxidative reductive processes, co-operative action these gives rise cycle shown in figure 7.1. The bears some similarity N cycle: it is essentially eight-electron shuttle between most oxidized (valence +6) form environment, SO , reduced -2) form, S2-. also resembles are accomplished exclusively prokaryotes will dealt with detail.