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    STUDIA BIOLOGIA - Issue no. 1 / 2019  
         
  Article:   VIRAL EVOLUTION AND DIVERSIFICATION: WHAT HAVE WE LEARNT FROM SALINIBACTER AND ITS VIRUSES?.

Authors:  MARÍA DOLORES RAMOS-BARBERO, JUDITH VILLAMOR, TOMEU VIVER, FERNANDO SANTOS, MANUEL MARTÍNEZ-GARCÍA, RAMON ROSSELLÓ-MÓRA, JOSEFA ANTÓN.
 
       
         
  Abstract:  Salinibacter ruber is frequently the most abundat bacterium in hypersaline environments but its numbers rarely reach that of the most abundant archaea. Using a combination of viral metagenomics of natural and manipulated hypersaline systems, culture and microscopy techniques, we undertook the study of S. ruber viruses to understand their role in controlling hosts’ abundance and diversity in nature. So far, we have isolated more than 200 new saliniviruses representing four new families within the Caudovirales. The monitoring of their genomes in nature together with the study of S. ruber viruses reconstructed in silico shows how both mutation and island acquisition shape their evolution. Furthermore, these studies unveil how rapidly viral communities can accomodate to changes in hosts populations.

Keywords: hypersaline, metagenomic island, Salinibacter, salinivirus, viral metagenome
 
         
     
         
         
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