Abstract
The near-UV component of sunlight decreased culturability of the leaf epiphyte and plant pathogen Pseudomonas syringae. Exposure of the wild-type cells for 4 h to UV-A and UV-B in sunlight was ten fold more detrimental than exposure to sunlight with just UV-A. Sensitivity to UV-A especially increased in a mutant of P. syringae lacking the global regulatory sigma factor, RpoS. No RpoS-mutant cells were culturable after 4 h of exposure to near-UV sunlight. These findings suggest that both UV-A and UV-B wavelengths cause damage to the bacterial cell and that the RpoS protein regulates protective measures for the leaf-associated pseudomonad.
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Received: 6 February 2001 / Accepted: 3 April 2001
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Miller, C., Mortensen, W., Braga, G. et al. The rpoS Gene in Pseudomonas syringae Is Important in Surviving Exposure to the Near-UV in Sunlight. Curr Microbiol 43, 374–377 (2001). https://doi.org/10.1007/s002840010319
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DOI: https://doi.org/10.1007/s002840010319