Terminal investment induced by a bacteriophage in a rhizosphere bacterium [v2; ref status: indexed, http://f1000r.es/zh]

F1000Research

Thomas Bell¹  Timothée Poisot²  Michael E Hochberg³  Esteban Martinez⁴  Claire Gougat-Barbera⁴ 

[1] Department of Life Sciences, Imperial College London, Silwood Park Campus, Ascot, Berkshire, SL5 7PY, UK;Québec Centre for Biodiversity Sciences, Stewart Biological Sciences Building, Montréal, QC, H3A 1B1, Canada;Santa Fe Institute, Santa Fe, NM, 87501, USA;Université Montpellier II, Institut des Sciences de l’Evolution, Montpellier, France;

关键词: Microbial Evolution & Genomics;    Microbial Growth & Development;    Microbial Physiology & Metabolism;    Virology;   

DOI  :  10.12688/f1000research.1-21.v2

来源: DOAJ

【 摘 要 】

Despite knowledge about microbial responses to abiotic stress, few studies have investigated stress responses to antagonistic species, such as competitors, predators and pathogens. While it is often assumed that interacting populations of bacteria and phage will coevolve resistance and exploitation strategies, an alternative is that individual bacteria tolerate or evade phage predation through inducible responses to phage presence. Using the microbial model Pseudomonas fluorescens SBW25 and its lytic DNA phage SBW25Φ2, we demonstrate the existence of an inducible response in the form of a transient increase in population growth rate, and found that the response was induced by phage binding. This response was accompanied by a decrease in bacterial cell size, which we propose to be an associated cost. We discuss these results in the context of bacterial ecology and phage-bacteria co-evolution.

【 授权许可】

Unknown