紫竹开花叶片光合特性与叶绿素荧光参数的变化  

Changes in Photosynthetic Characteristics and Chlorophyll Fluorescence Parameters in Leaves of Flowering Phyllostachys nigra var.punctata

作　　者：孙慧 曹志华[1] 吴中能[1] 方明刚 蒋京 钱孔屏 Sun Hui;Cao Zhihua;Wu Zhongneng;Fang Minggang;Jiang Jing;Qian Kongping(Anhui Academy of Forestry,Hefei 230088,China;Shahe National Long-Term Scientific Research Base for Forest Breeding,Chuzhou 239004,Anhui,China;Guangde Forestry Development Center,Guangde 242200,Anhui,China;Guangde Forestry Research Institute,Guangde 242200,Anhui,China)

机构地区：[1]安徽省林业科学研究院,合肥230088 [2]安徽沙河林木育种国家长期科研基地,安徽滁州239000 [3]广德市林业发展中心,安徽广德242200 [4]广德市林业科学研究所,安徽广德242200

出　　处：《世界竹藤通讯》2024年第5期59-63,69,共6页World Bamboo and Rattan

基　　金：“十四五”国家重点研发计划任务(2023YFD220120403);中央财政林业科技推广示范项目(皖[2023]TG12号);2023年安徽省林业科研创新项目。

摘　　要：为研究紫竹(Phyllostachys nigra var.punctata)开花后叶片光合特性与叶绿素荧光参数的变化,以不同生长年限开花与未开花紫竹为试材,测定叶片的光合指标与叶绿素荧光参数。结果表明:蒸腾速率与净光合速率显著相关,与气孔导度极显著相关;最大光合效率(Fv/Fm)与光系统II的实际光合效率[Y(II)]、表观电子传递速率(ETR)显著相关;但净光合速率与Fv/Fm相关性不显著。通过主成分分析法以光合能力强、光合速率快和强光照适应能力好为评判标准得出,3年生开花紫竹光合能力最弱、光合速率最慢、强光照适应能力最差,表明生长年限较大的紫竹开花后综合光合能力较差,其生长发育走向死亡。研究结果可为进一步探求紫竹开花的内在生理变化提供参考依据。In order to study the changes in photosynthetic characteristics and chlorophyll fluorescence parameters of leaves of Phyllostachys nigra var.punctata after flowering,the photosynthetic indexes and chlorophyll fluorescence parameters of leaves from flowering and non-flowering Ph.nigra var.punctata are measured in different years of growth.The results show that the transpiration rate is significantly correlated with net photosynthetic rate and stomatal conductance.F_v/F_m is significantly correlated with Y(II)and ETR.However,there is no significant correlation between net photosynthetic rate and F_v/F_m.According to the criteria of strong photosynthetic capacity,fast photosynthetic rate and good adaptability to strong light,the results from principal component analysis show that 3-year flowering Ph.nigra var.punctata has the weakest photosynthetic capacity,the slowest photosynthetic rate and the worst adaptability to strong light.This indicates that the comprehensive photosynthetic capacity of Ph.nigra var.punctata with longer years of growth is poor after flowering,ultimately leading to its death.The results of this study provide a reference for further exploring the inherent physiological changes of Ph.nigra var.punctata flowering.

关 键 词：紫竹 开花 光合特性 叶绿素荧光参数 

分 类 号：S795[农业科学—林木遗传育种]