Effects of 60Co-γ radiation on growth and physiological index of two kinds of Weigela florida seedlings
In order to explore the effects of radiation mutagenesis on the morphological and physiological characteristics of Weigela florida"Alba"and Weigela florida,the 60Co-γ ra-diation at different doses(0～300 Gy)was used to irradiate the dormant seeds of W.florida"Alba"and W.florida to observe the effect of radiation on the growth of alum root,the growth amount and chlorophyll content,chlorophyll fluorescence,photosynthetic index,SOD,POD,MDA and soluble protein content of seedling leaves were measured.The results showed that due to the increase of radiation dose,seedling height,leaf length,leaf width,pitch spacing,chlorophyll fluorescence,photosynthesis parameters,SOD activity and POD activity showed a clear trend of first increasing and then decreasing,reaching a peak at 50 Gy.At the same time,with the increase of radiation dose,the chlorophyll content and solu-ble protein content showed a downward trend.The MDA content was significantly in-creased.In summary,under the radiation condition of(2 Gy/min)dose rate,the mutagenic dose of W.florida"Alba"seeds was 50 Gy,the W.florida in 50-100 Gy was the most suitable.
NETL
NSTL
万方数据
