Fraĭkin G Ia, Belenikina N S, Piniaskina E V, Rubin A B
Izv Akad Nauk Ser Biol. 2013 Nov-Dec(6):754-9.
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.
将酵母短暂暴露于低强度单色光（400 - 730纳米）下，已揭示了中波UVB辐射（290 - 320纳米）使细胞失活后的光复活和光保护作用。已发现，在680纳米处有最大值的红色光谱区域在引发光复活和光保护方面最为活跃。值得注意的是，根据所研究的规律，这些过程与已知的酶促光复活和光保护过程有根本区别，后者的光谱响应分别受蓝光（< 450纳米）和近紫外光（< 380纳米）限制。所获得的数据使得有可能将观察到的光复活和光保护效应视为某种光依赖防御系统功能的表现，该系统能够增强细胞对UVB辐射的抗性。
