Reference: Fraĭkin GIa, et al. (2013) [New photo-induced effects of reactivation and protection of yeast cells under lethal UVB radiation]. Izv Akad Nauk Ser Biol 754-9

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Abstract


Brief exposure of yeasts to low-intensity monochromatic light (400-730 nm) has revealed the effects of photoreactivation and photoprotection of the cells inactivated by medium wave UVB radiation (290-320 nm). The red spectral region with a maximum at 680 nm has been found to be the most active in the initiation of photoreactivation and photoprotection. It has been noted that, according to the regularities investigated, these processes differ fundamentally from the known processes of enzymatic photoreactivation and photoprotection, which have a spectral response limited by, respectively, blue (< 450 nm) and near (< 380 nm) UV light. The data obtained make possible to consider the observed effects of photoreactivation and photoprotection as the manifestation of functioning of some light-dependent defense system capable of increasing the resistance of cells to UVB radiation.

Reference Type
Journal Article
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Fraĭkin GIa, Belenikina NS, Piniaskina EV, Rubin AB
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