Send to

Choose Destination
See comment in PubMed Commons below
J Photochem Photobiol B. 2000 Feb;54(2-3):155-61.

Non-coherent visible and infrared radiation increase survival to UV (254 nm) in Escherichia coli K12.

Author information

Instituto de Biofísica Carlos Chagas Filho, Centro de Ciências da Saúde, UFRJ, Rio de Janeiro, RJ, Brazil.


Interactions between visible or infrared (IR) and ultraviolet (UV, 254 nm) radiation have been studied in E. coli. Pre-illumination with non-coherent monochromatic 446, 466, 570 and 685 nm radiation, as well as with polychromatic red and IR radiation at room temperature, leads to increased cell survival after a subsequent irradiation with UV light. In the thermic range of the spectrum (red and IR), IR but not red light pre-treatment is able to increase cell survival to a subsequent lethal heat (51 degrees C) challenge, suggesting that increased UV survival may be due to IR-induced heat-shock response. On the other hand, visible-light-induced resistance may be due to a different mechanism, possibly involved with unknown bacterial light receptors.

[Indexed for MEDLINE]
PubMed Commons home

PubMed Commons

How to join PubMed Commons

    Supplemental Content

    Full text links

    Icon for Elsevier Science
    Loading ...
    Support Center