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当前位置: 首页 > 文章 > 微小原甲藻的生长及其对锌限制的响应 应用生态学报 2003,14 (7) 1140-1142
Position: Home > Articles > Response of Prorocentrum minimum growth to zinc limitation Chinese Journal of Applied Ecology 2003,14 (7) 1140-1142

微小原甲藻的生长及其对锌限制的响应

作  者：
胡晗华;石岩峻;丛威;蔡昭铃;欧阳藩
单  位：
中国科学院过程工程研究所生化工程国家重点实验室
关键词：
赤潮;光合作用;生长;微小原甲藻;锌限制
摘  要：
研究了低中高 3种Zn2 + 浓度下 ,赤潮藻微小原甲藻的生长和生理响应 .结果表明 ,低Zn(1.4pmol·L-1)下 ,藻细胞的比生长速率和稳定期生物量分别为 0 .4 0d-1和 5 110 0cell·ml-1.当Zn2 + 浓度超过2 4 .4pmol·L-1时 ,提高Zn2 + 浓度 (181.6pmol·L-1) ,藻细胞的比生长速率没有改变 ,为 0 .93d-1,而稳定期生物量则略有下降 ,但均明显高于低Zn条件下藻细胞的比生长速率和稳定期生物量 .Zn限制条件下藻细胞的叶绿素a合成受到影响 ,藻细胞光合作用需在更高光强下达到饱和 .随着Zn2 + 浓度增加藻细胞光饱和的光合作用速率 (Pm)及光合作用效率 (α)均明显增大 .研究表明 ,富营养化水体中 ,高的Zn浓度是一定条件下触发赤潮藻类爆发性增殖的重要因子之一 .
译  名：
Response of Prorocentrum minimum growth to zinc limitation
作  者：
HU Hanhua 1,2,SHI Yanjun 1,3, CONG Wei 1,CAI Zhaoling 1 and OUYANG Fan 1 ( 1State Key Laboratory of Biochemical Engineering, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100080, China; 2School of Life Sciences, Xiamen University, Xiamen 361005, China; 3School of Chemical Engineering, Beijing University of Chemical Technology, Beijing 100029, China)
关键词：
Red tide, Photosynthesis, Growth, Prorocentrum minimum, Zinc limitation
摘  要：
Studies on the growth and physiological response of red tide alga Prorocentrum minimum to three Zn 2+ levels were showed that the specific growth rate and biomass were limited in low Zn 2+-grown cells (1.4 pmol·L -1, which were 0.40 d -1 and 51100 cell·ml -1 respectively. The specific growth rate was not significantly different when the Zn 2+ concentration in medium was increased over 24.4 pmol·L -1,but there was a slight decrease in biomass; however, both specific growth rate and biomass were much higher than those in low Zn 2+-grown cells. It was also showed that chlorophyll a synthesis was limited due to Zn 2+ deficient,and therefore,the cells became light saturated at higher irradiance under Zn-limited condition. Light-saturated photosynthetic rates (Pm) and photosynthetic efficiency (α) increased significantly with increasing Zn 2+ concentrations. It was concluded that Zn 2+ concentration might be one of the key factors affecting red tide blooms in eutrophication environment.

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