镧对鹅毛竹开花后光合特性的影响  

Effects of lanthanum on photosynthetic characteristics of Shibataea chinensis Nakai after bloom

作　　者：谢寅峰[1] 林侯[2] 蔡贤雷[1] 周坚[1] 丁雨龙[1] 

机构地区：[1]南京林业大学森林资源与环境学院 [2]厦门理工学院管理科学系

出　　处：《北京林业大学学报》2008年第5期7-12,共6页Journal of Beijing Forestry University

基　　金：国家自然科学基金项目(39900115);江苏省高校自然科学基金项目(05KJB220053);南京林业大学"十五"人才培养对象基金资助项目(PG2003-02)

摘　　要：为了探讨稀土对竹子开花后光合及衰老生理的调节作用,该文以鹅毛竹为试验材料,于2006年6—11月采用100 mg/L镧稀土处理,测定鹅毛竹花后光合作用及叶绿素荧光参数等的动态变化。结果表明:与对照相比,镧处理不同程度地提高了光系统Ⅱ(PSⅡ)的最大光能转换效率(Fv/Fm)、PSⅡ实际光化学效率(ΦPSⅡ)和PSⅡ潜在活性(Fv/F0),显著增加了叶绿素、可溶性蛋白质含量和净光合速率(Pn),抑制了叶片衰老过程中上述指标的下降。说明镧有效改善了鹅毛竹花后光合性能,延缓了开花鹅毛竹的衰老进程,并对镧缓解光合能力衰退的机制进行了讨论。In order to explore the regulation effects of rare earth on photosynthesis and senescence physiology of bamboo after bloom, Shibataea chinensis Nakai was taken as experimental material. The dynamic changes of photosynthesis and chlorophyll fluorescence parameter were observed by 100 mg/L lanthanum treatment during June 2006 to November 2006. The results show that potential quantum efficiency of PS Ⅱ , actual photochemical efficiency of PS Ⅱ, potential activity of PS Ⅱ , chlorophyll content, soluble protein content and net photosynthetic rate of treatment group were significantly higher than that of control group, and the descent of these indices in treatment group was inhibited during leaf senescence. These results demonstrate that the photosynthetic characteristics of Shibataea chinensis Nakai after bloom is improved efficiently and senescence process is postponed by lanthanum treatment. At last, the mechanism of relieving the decline of photosynthetic capacity by lanthanum was discussed.

关 键 词：镧 鹅毛竹 开花 光合作用 叶绿素荧光 衰老 

分 类 号：S718.43[农业科学—林学] S795