Aerobic Anoxygenic Photosynthesis Is Commonly Present Within the Genus Limnohabitans

Overview

Journal Appl Environ Microbiol

Specialties Environmental Health
Microbiology

Date 2017 Oct 15

PMID 29030444

Citations 26

Authors

Vojtech Kasalicky

Yonghui Zeng

Kasia Piwosz

Karel Simek

Hana Kratochvilova

Michal Koblizek

Affiliations

Soon will be listed here.

Abstract

The genus (, ) is a common and a highly active component of freshwater bacterioplanktonic communities. To date, the genus has been considered to contain only heterotrophic species. In this study, we detected the photosynthesis genes and in 28 of 46 strains from three lineages. The sequences obtained are very closely related to environmental sequences detected in various freshwater habitats, indicating the ubiquity and potential importance of photoheterotrophic in nature. Additionally, we sequenced and analyzed the genomes of 5 potentially photoheterotrophic strains, to gain further insights into their phototrophic capacity. The structure of the photosynthesis gene cluster turned out to be highly conserved within the genus and also among all potentially photosynthetic strains. The expression of photosynthetic complexes was detected in a culture of II-D5 using spectroscopic and pigment analyses. This was further verified by a novel combination of infrared microscopy and fluorescent hybridization. The data presented document that the capacity to perform anoxygenic photosynthesis is common among the members of the genus , indicating that they may have a novel role in freshwater habitats.

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