太湖常见浮叶植物和沉水植物的光合荧光特性比较  

Photosynthetic fluorescence characteristics of floating-leaved and submersed macrophytes commonly found in Taihu Lake

作　　者：宋玉芝[1] 蔡炜[1] 秦伯强[2] 

机构地区：[1]南京信息工程大学环境科学与工程学院,南京210044 [2]中国科学院南京地理与湖泊研究所,南京210008

出　　处：《应用生态学报》2009年第3期569-573,共5页Chinese Journal of Applied Ecology

基　　金：中国科学院知识创新工程重要方向性项目(KZCX2-YW-419);国家自然科学基金重点项目(40730529);江苏省高校自然科学基础研究项目(07KJD610136)资助

摘　　要：利用水下饱和脉冲荧光仪(DIVING-PAM),原位观测太湖常见的水生植物菱、荇菜、苦草、黑藻的最大光化学量子产量(Fv/Fm)及在暗适应和光适应条件下的快速光曲线.结果表明:浮叶植物菱和荇菜光系统Ⅱ的潜在最大光合作用能力高于沉水植物苦草和黑藻,其最大量子产量分别为0.837、0.831、0.684和0.764;菱和荇菜的最大电子传递速率、半饱和光强分别高于沉水植物苦草和黑藻,且在光适应条件下尤为显著.Some aquatic macrophytes commonly found in Taihu Lake, including Trapa bispinosa, Nymphyoides peltatum, Vallisneria natans, and Hydrilla verticillata were collected, and their maximal quantum yield of photosystem Ⅱ （Fv/Fm） as well as the rapid light curves （RLCs） under conditions of light adaptation and dark adaptation were measured in situ by using a submersible and pulse-amplitude modulated fluorometer （Diving-PAM）. The results showed that floating-leaved plants T. bispinosa and N. peltaturn had higher potential maximum photosynthetic capacity than submerged macrophytes V. natans and H. verticillata. The measured maximal quantum yield of T. bispinosa, N. peltatum, V. natans, and H. verticillata was 0. 837, 0. 831,0. 684, and 0. 764, respectively. Both the maximal relative electron transport rate and the half saturation point of light intensity of T. bispinosa and N. peltatum were higher than those of V. natans and H. verticillata, especially under the condition of light adaptation.

关 键 词：量子产量 快速光曲线 水生植物 太湖 

分 类 号：Q945[生物学—植物学]