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当前位置: 首页 > 文章 > 不同竹龄青皮竹光合作用与荧光特性的比较 西北林学院学报 2013,28 (6) 33-36+41
Position: Home > Articles > A Comparative Study on Photosynthetic and Fluorescence Characteristics among Different Aged Bambusa textilis Journal of Northwest Forestry University 2013,28 (6) 33-36+41

不同竹龄青皮竹光合作用与荧光特性的比较

作  者：
吴志庄;李伟成;熊德礼;王树东;周妍
单  位：
湖北省林业科学研究院;国家林业局竹子研究开发中心
关键词：
青皮竹;净光合速率;光响应;荧光特性
摘  要：
对不同竹龄青皮竹的光合与荧光特征研究表明:不同竹龄的青皮竹净光合速率(Pn)差异显著,1龄竹的净光合速率大于8μmol·m-2·s-1,明显高于3龄竹,说明随着竹龄增加,青皮竹光合固碳能力有所下降。气孔导度(Cond)、胞间CO2浓度(Ci)、蒸腾速率(Tr)3个性状都表现为1龄竹>2龄竹>3龄竹。水分利用效率(WUE)表现相反,为3龄竹>2龄竹>1龄竹。光响应曲线表明,当光强始增强时,各竹龄间差异较小,但随着光强的继续增加,不同竹龄出现很大的差异,其中,1龄竹光补偿点和光饱和点相对较高,其潜在净光合速率也高于其它竹龄的青皮竹。青皮竹最大荧光效率(Fv/Fm)平均为0.590 5,光系统Ⅱ活性(Fv/Fo)平均为1.442 0,各叶绿素荧光参数都随着年龄增加而降低,但差异不显著。
译  名：
A Comparative Study on Photosynthetic and Fluorescence Characteristics among Different Aged Bambusa textilis
作  者：
WU Zhi-zhuang;LI Wei-chen;XIONG De-li;WANG Shu-dong;ZHOU Yan;China National Bamboo Research Center;Collegeof Biological Sciences and Technology,Beijing Forestry University;Hubei Forestry Institute;
关键词：
Bambusa textilis;;net photosynthetic rate;;light response curve;;fluorescence characteristic
摘  要：
A study on the photosynthetic and fluorescence characteristics of Bambusa textilis was conducted.The results showed significant differences in net photosynthetic rate(Pn)among different aged Bambusa textilis.The net photosynthetic rate of 1age bamboos exceeded 8μmol·m-2·s-1,much higher than that of 3age ones,which indicated a decreasing trend of photosynthetic carbon sequestration capacity of B.textilis with its age increased.All of the 3characters of stomatic conductance(Cond),CO2intercellular concentration(Ci)and transpiration rate(Tr)showed a same trend of 1age bamboo>2age bamboo>3age bamboo.Contrarily,water use efficiency(WUE)showed an opposite rule of 3age bamboo>2age bamboo>1age bamboo.And for light response curve,the differences among various aged bamboos were small at the initial stage of light increase,but apparent differences among them were observed with further light increase.It was relatively higher for 1age bamboo on its light compensation point and light saturation point,same as its potential net photosynthetic rate(Pmax).The average maximum fluorescence efficiency(Fv/Fm)and activity of photosystemⅡ(Fv/Fo)of B.textilis were0.590 5and 1.442 0,respectively,and the fluorescence parameters tended to decrease with increasing age,but having not significant difference.

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