Variability of rRNA Operon Copy Number and Growth Rate Dynamics of Bacillus Isolated from an Extremely Oligotrophic Aquatic Ecosystem

Frontiers in Microbiology
Jorge A Valdivia-AnistroValeria Souza

Abstract

The ribosomal RNA (rrn) operon is a key suite of genes related to the production of protein synthesis machinery and thus to bacterial growth physiology. Experimental evidence has suggested an intrinsic relationship between the number of copies of this operon and environmental resource availability, especially the availability of phosphorus (P), because bacteria that live in oligotrophic ecosystems usually have few rrn operons and a slow growth rate. The Cuatro Ciénegas Basin (CCB) is a complex aquatic ecosystem that contains an unusually high microbial diversity that is able to persist under highly oligotrophic conditions. These environmental conditions impose a variety of strong selective pressures that shape the genome dynamics of their inhabitants. The genus Bacillus is one of the most abundant cultivable bacterial groups in the CCB and usually possesses a relatively large number of rrn operon copies (6-15 copies). The main goal of this study was to analyze the variation in the number of rrn operon copies of Bacillus in the CCB and to assess their growth-related properties as well as their stoichiometric balance (N and P content). We defined 18 phylogenetic groups within the Bacilli clade and documented a range of from six t...Continue Reading

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Citations

May 9, 2019·Scientific Reports·Andreas DomröseAnita Loeschcke
Jun 15, 2017·Frontiers in Microbiology·Zarraz M-P LeeJames J Elser
Sep 29, 2017·NPJ Biofilms and Microbiomes·Robert NiederdorferHannes Peter
May 10, 2017·PeerJ·Hector Fernando Arocha-GarzaSusana De la Torre-Zavala
Apr 26, 2021·Ecology Letters·Mark WestobySasha G Tetu
Oct 20, 2021·FEMS Microbiology Ecology·Mark WestobySasha G Tetu

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Methods Mentioned

BETA
electrophoresis
PCR
X-ray

Software Mentioned

BLAST
CLUSTAL W
Primer Select
DNASTAR Lasergene 7 package
CurveExpert Professional
MEGA5
R Statistic

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