The Effect on Photosynthetic Characteristics of Transgenic Tobacco with BnDREB1-5 Gene by Drought Stress

The photosynthetic characteristics,the content of chlorophyll,carotenoids and soluble sugar in tobacco leaves were analyzed after physical drought stressed.The results showed that after physical drought stressed,the initial fluorescence(Fo) and non-photochemical quenching(qN) of transgenic tobacco increased,but were significantly lower than wild-type.Other fluorescence parameter lower rates were significantly lower than that of wild-type.The photosynthetic parameter and chorophyll content of both samples decreased,but the lower rates were significantly lower than that of wild-type.The content of soluble sugar of transgenic tobacco was significantly higher than wild-type.These results indicated that the BnDREB1-5 transcription factor gene had an effect on drought stressed.