摘要
[目的]研究自然降温过程中香樟和广玉兰的抗寒性差异。[方法]选取徐州地区香樟和广玉兰的健康叶片为材料,探讨自然降温过程中其细胞质膜相对透性、丙二醛含量、超氧化物歧化酶(SOD)活性和游离脯氨酸含量的动态变化规律。[结果]随着气温的降低,2个树种的细胞质膜相对透性、丙二醛含量和游离脯氨酸含量均呈先上升后下降趋势,其中2树种细胞质膜相对透性和游离脯氨酸含量的最大值均出现在1月份;2个树种的超氧化物歧化酶活性均呈"M"状变化,但整个过程中广玉兰的超氧化物歧化酶活性均高于香樟。[结论]广玉兰的抗寒性强于香樟。
[Objective] The aim was to study the difference of cold resistance of Cinnamomum camphora and Magnolia grandiflora in natural decreasing process of air temperature.[Method] With health leaves of C.camphora and M.grandiflora in xuzhou as the materials,the dynamic change laws of their cell membrane permeability,malondialdehyde content,superoxide dismutase activity and free proline conten in natural decreasing process of air temperature were studied.[Result] With the decrease of temperature,the cell membrane permeability and the contents of malondialdehyde and free proline of 2 tree species were all showed a trend of increase first then decrease,and the maximum of cell membrane permeability and free proline content of 2 tree species were all appeared in january.The superoxide dismutase activities of 2 tree species showed ＂M＂ curve change,and the superoxide dismutase activity of M.grandiflora was higher than that of C.camphora in the whole process.[Conclusion] The cold-resistance of M.grandiflora was stronger than that of C.camphora.
出处
《安徽农业科学》
CAS
北大核心
2010年第16期8653-8654,8657,共3页
Journal of Anhui Agricultural Sciences
基金
林业科技支撑计划子专题(2006BAD03A00-6)
徐州师范大学研究生科研创新项目(09YLB033)
关键词
自然降温
香樟
广玉兰
抗寒性
Natural decreasing of temperature
Cinnamomum camphora
Magnolia grandiflora
Cold resistance
