Two Chloroflexi classes independently evolved the ability to persist on atmospheric hydrogen and carbon monoxide.

ABSTRACT: Most aerobic bacteria exist in dormant states within natural environments. In these states, they endure adverse environmental conditions such as nutrient starvation by decreasing metabolic expenditure and using alternative energy sources. In this study, we investigated the energy sources that support persistence of two aerobic thermophilic strains of the environmentally widespread but understudied phylum Chloroflexi. A transcriptome study revealed that Thermomicrobium roseum (class Chloroflexia) extensively remodels its respiratory chain upon entry into stationary phase due to nutrient limitation. Whereas primary dehydrogenases associated with heterotrophic respiration were downregulated, putative operons encoding enzymes involved in molecular hydrogen (H₂), carbon monoxide (CO)

SUBMITTER: Islam ZF 

PROVIDER: S-EPMC6776052 | biostudies-literature | 2019 Jul

REPOSITORIES: biostudies-literature