Figure 5
From: Microbial life at high salt concentrations: phylogenetic and metabolic diversity
Distribution within the phylogenetic tree of microorganisms accumulating organic solutes to provide osmotic balance. Groups marked with red boxes contain at least some halophilic representatives in which de novo synthesis and/or accumulation of organic solutes has been demonstrated. The group of the Firmicutes contains both halophilic aerobes that accumulate organic solutes and anaerobic fermentative microorganisms (the order Halanaerobiales) that use KCl.