紫外线-B辐射对植物DNA及蛋白质的影响

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。

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

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 depletion of stratospheric ozone layer,with the focus on the UV-B radiation's effects on the inhibition of protein synthesis and the repair approaches of DNA damage.The prospects on applying the technology of molecule ecology to study the plants' resistant mechanism and DNA damage repair techniques were discussed.