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 photo-protection as the manifestation of functioning of some light-dependent defense system capable of increasing the resistance of cells to UVB radiation.
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Original Russian Text © G.Ya. Fraikin, N.S. Belenikina, E.V. Pinyaskina, A.B. Rubin, 2013, published in Izvestiya Akademii Nauk, Seriya Biologicheskaya, 2013, No. 6, pp. 754–759.
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Fraikin, G.Y., Belenikina, N.S., Pinyaskina, E.V. et al. New photo-induced effects of reactivation and protection of yeast cells under lethal UVB radiation. Biol Bull Russ Acad Sci 40, 562–566 (2013). https://doi.org/10.1134/S1062359013060058
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DOI: https://doi.org/10.1134/S1062359013060058