我国水华蓝藻的新类群--阿氏浮丝藻(Planktothrix agardhii)生理特性  

Physiological characteristics of Planktothrix agardhii—A new taxa of bloom cyanophyta in China

作　　者：林燊[1] 彭欣[1] 吴忠兴[1] 李仁辉[1] 

机构地区：[1]中国科学院水生生物研究所

出　　处：《湖泊科学》2008年第4期437-442,共6页Journal of Lake Sciences

基　　金：中国科学院领域前沿项目(055102-1-501);淡水生态与生物技术国家重点实验室开放课题(2007FB06)联合资助

摘　　要：阿氏浮丝藻(Planktothrixagardhii)是水华蓝藻的重要类群,实验对我国不同省份分离到的5株阿氏浮丝藻生长速率、色素组成、光合活性参数进行了测定.结果表明分离于广州的HAB1128叶绿素a(Chl.a)含量较低,藻蓝蛋白(C-PC)比例和含量较高.电子传递速率(ETR)测定结果表明,HAB1128的ETR曲线较高,最大ETRmax值也显著高于其余4株,高效的光能电子传递链弥补了光合色素Chl.a的不足,以致HAB1128保持了中性的生长速率.分离于武汉东湖的HAB631则与之正好相反,较高的Chl.a受限于光能电子传递链的薄弱,生长速率表现较低.分离于北京、上海、昆明的3株藻株在各项生理指标上无显著差异.Five strains of Planktothrix agardhii isolated from five regions around China were studied for their physiological characteristics, including growth rate, pigment composition, photosynthetic activity. Strain HAB1128 isolated from Guangzhou contained lower chlorophyll-a（Chl.a）, but higher C-PC content and higher C-PC ratio in total phycobiliprotein compared to other 4 strains. Results from electron transfer rate （ETR） showed that HAB1128 had higher photosynthetic ETR and the maximal ETRmax, which inferred that high-performance electron transfer chain retrieved the inadequacy of Chl.a of this strain, and lead to the neutral growth rate. On the contrary, HAB631 the strain isolated from East Lake （Wuhan）, contained higher Chl.a content, but showed lower growth rate due to its weak electron transfer chain. No significant differences of physiological parameters were shown among three strains isolated from Beijing, Shanghai and Yunnan.

关 键 词：水华种 阿氏浮丝藻 颤藻 生理特性 色素 光合活性 

分 类 号：X524[环境科学与工程—环境工程]