期刊
ENVIRONMENTAL MICROBIOLOGY
卷 14, 期 3, 页码 655-668出版社
WILEY-BLACKWELL
DOI: 10.1111/j.1462-2920.2011.02608.x
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资金
- NSF IOS [0841507]
- NIH [R01 RR12294]
- Gordon and Betty Moore Foundation [ZF211]
- Broad Institute SPARC
- NIH Molecular Biosciences [5T32GM007215-35]
- NIH Microbes in Health and Disease through UW-Madison [2T32AI055397-07]
- Woods Hole Center for Oceans and Human Health (COHH)
- NSF Microbial Systems
- Directorate For Geosciences
- Division Of Ocean Sciences [0911031, GRANTS:13931157] Funding Source: National Science Foundation
- Division Of Integrative Organismal Systems
- Direct For Biological Sciences [0841507, GRANTS:14025565] Funding Source: National Science Foundation
This study reports the first description and molecular characterization of naturally occurring, non-bioluminescent strains of Vibrio fischeri. These 'dark' V. fischeri strains remained non-bioluminescent even after treatment with both autoinducer and aldehyde, substrate additions that typically maximize light production in dim strains of luminous bacteria. Surprisingly, the entire lux locus (eight genes) was absent in over 97% of these dark V. fischeri strains. Although these strains were all collected from a Massachusetts (USA) estuary in 2007, phylogenetic reconstructions allowed us to reject the hypothesis that these newly described non-bioluminescent strains exhibit monophyly within the V. fischeri clade. These dark strains exhibited a competitive disadvantage against native bioluminescent strains when colonizing the light organ of the model V. fischeri host, the Hawaiian bobtail squid Euprymna scolopes. Significantly, we believe that the data collected in this study may suggest the first observation of a functional, parallel locus-deletion event among independent lineages of a non-pathogenic bacterial species.
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