| Effects of ecological adaptability on lacking water rape plant were studied by pot experiments,and the leaves malondialdehyde(MDA) content and roots activities and biomass yield and the superoxide dismutase(SOD) activity and catalase(POD) activity and cell membrane permeability of rape seedling were mensurated on different genotypes of rape varieties(Yuyou 20,Longyou 4,Long 2-1 and Qingyou 331-2).The results showed that MDA content,cell membrane permeability,SOD activity and POD activity of 4 different genotypes of rape seedlings were gradually increased with the enhancement of water intimidated level,but roots activities and overground biomass yield were reduced.The change trend of physiological and chemical indices was not accordant in experiments,which indicated that responses approach of water stress adaptability had diversity in rape cropping.According to the results of analysis and comparison study,eco-adaptability capability of drought resistance of 4 different genotypes of rape varieties was that Qingyou 331-2 became the strongest,Longyou 2-1 took the second place,Longyou 4 was relatively poor and Yuyou 20 showed the lowest. |