紫外线-B辐射对植物DNA及蛋白质的影响

Effects of enhanced UV-B radiation on protein synthesis and DNA damage in plants

大气平流层中的臭氧衰减,导致太阳辐射中的紫外辐射量有明显的增加,其中UV-B辐射对植物会产生不同程度的影响。分子生态学理论认为,UV-B辐射对植物造成的损伤,首先伤害植物的生物大分子,即进行光化学修饰。本文就臭氧衰减对生态环境和植物的影响途径进行了讨论,重点论述了UV-B辐射对植物蛋白质合成的抑制和DNA的损伤修复途径。并应用分子生物学技术研究植物对UV-B辐射的抗性机理和DNA修复技术的前景进行了展望。

The gradual depletion of stratospheric ozone layer in atmosphere has led to the increase of solar UV-B radiation that reaches earth surface.The enhanced UV-B radiation would affect plants in various extents through different mechanisms.According to the theories of molecule ecology,the damage of plants by enhanced UV-B radiation is firstly represented as a damage of bio-macromolecule,i.e.,photochemical modification.This paper discussed the ways of UV-B radiation affecting environment and plants after the dep...