Understanding the mechanisms of halotolerance in members of Pontixanthobacter and Allopontixanthobacter by comparative genome analysis

Halotolerant microorganisms have developed versatile mechanisms for coping with saline stress. With the increasing number of isolated halotolerant strains and their genomes being sequenced, comparative genome analysis would help understand the mechanisms of salt tolerance. Six type strains of Pontix...

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Published inFrontiers in microbiology Vol. 14; p. 1111472
Main Authors Zhou, Peng, Bu, Yu-Xin, Xu, Lin, Xu, Xue-Wei, Shen, Hong-Bin
Format Journal Article
LanguageEnglish
Published Switzerland Frontiers Media S.A 13.03.2023
Subjects
adaptation
co-occurrence
comparative genomics
Erythrobacteraceae
halotolerance
Microbiology
halotolerance
adaptation
co-occurrence
Erythrobacteraceae
comparative genomics
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Summary:Halotolerant microorganisms have developed versatile mechanisms for coping with saline stress. With the increasing number of isolated halotolerant strains and their genomes being sequenced, comparative genome analysis would help understand the mechanisms of salt tolerance. Six type strains of Pontixanthobacter and Allopontixanthobacter , two phylogenetically close genera, were isolated from diverse salty environments and showed different NaCl tolerances, from 3 to 10% (w/v). Based on the co-occurrence greater than 0.8 between halotolerance and open reading frame (ORF) among the six strains, possible explanations for halotolerance were discussed regarding osmolyte, membrane permeability, transportation, intracellular signaling, polysaccharide biosynthesis, and SOS response, which provided hypotheses for further investigations. The strategy of analyzing genome-wide co-occurrence between genetic diversity and physiological characteristics sheds light on how microorganisms adapt to the environment.
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Reviewed by: Kesava Priyan Ramasamy, Nanyang Technological University, Singapore
This article was submitted to Extreme Microbiology, a section of the journal Frontiers in Microbiology
Edited by: Rosa María Martínez-Espinosa, University of Alicante, Spain
ISSN:1664-302X
1664-302X
DOI:10.3389/fmicb.2023.1111472