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| 条浒苔和缘管浒苔对镉胁迫的生理响应比较 | |
| 引用本文： | 蒋和平,郑青松,朱明,刘兆普,姚瑶,刘国红.条浒苔和缘管浒苔对镉胁迫的生理响应比较[J].生态学报,2011,31(16):4525-4533. |
| 作者姓名： | 蒋和平 郑青松 朱明 刘兆普 姚瑶 刘国红 |
| 作者单位： | 1. 南京农业大学资源与环境科学学院江苏省海洋生物学重点实验室,南京,210095 2. 南京农业大学资源与环境科学学院江苏省海洋生物学重点实验室,南京,210095;浙江省近岸水域生物资源开发与保护重点实验室,温州,325005 3. 南京农业大学资源与环境科学学院江苏省海洋生物学重点实验室,南京,210095;淮海工学院海洋学院,连云港,222005 |
| 基金项目： | 国家高技术研究发展计划（863计划） |
| 摘 要： | 为探讨大型海藻对重金属胁迫的生理响应及耐受机制，以条浒苔（Enteromorpha clathrata）和缘管浒苔（Enteromorpha linza）为试验材料，研究了不同浓度的镉（Cd2 ）处理7天对两个浒苔品种的生长、叶绿素（Chl）和类胡萝卜素（Car）含量、叶绿素荧光参数以及可溶性糖（SS）和可溶性蛋白含量（SP）的影响。结果表明：随着Cd2 浓度的增加，条浒苔和缘管浒苔鲜重和相对生长速率（RGR）与对照相比显著下降，且条浒苔的鲜重和RGR降低幅度大于缘管浒苔。镉胁迫下，叶绿素和类胡萝卜素含量、叶绿素a/叶绿素b（Chla/Chlb）、PSⅡ最大光能转化效率（Fv/Fm）、PSⅡ实际光能转化效率（Yield）、最大相对电子传递速率（rETRmax即Pm）和光能利用效率（α）、可溶性蛋白含量随着Cd2 浓度的升高均出现下降趋势，除了叶绿素外，条浒苔的其它指标的降幅要大于缘管浒苔。随着镉胁迫强度的增加，浒苔可溶性糖含量呈现逐渐显著上升。上述表明，条浒苔和缘管浒苔对Cd2 胁迫均具有一定的适应能力，且缘管浒苔耐镉性高于条浒苔。在镉胁迫下，维持较高的Car含量、Chla/Chlb、Fv/Fm、Yield、rETRmax、α、SS含量、SP含量是缘管浒苔耐镉性高于条浒苔的主要原因。 |
| 关 键 词： | 条浒苔 缘管浒苔 镉胁迫 生长 叶绿素荧光参数 |
| 收稿时间： | 2010/8/18 0:00:00 |
| 修稿时间： | 2011/4/11 0:00:00 |
Comparative physiological responses of cadmium stress on Enteromorpha clathrata and Enteromorpha linza |
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| JIANG Heping,ZHENG Qingsong,ZHU Ming,LIU Zhaopu,YAO Yao and LIU Guohong.Comparative physiological responses of cadmium stress on Enteromorpha clathrata and Enteromorpha linza[J].Acta Ecologica Sinica,2011,31(16):4525-4533. | |
| Authors: | JIANG Heping ZHENG Qingsong ZHU Ming LIU Zhaopu YAO Yao and LIU Guohong |
| Institution: | Jiangsu Provincial Key Laboratory of Marine Biology, College of Resources and Environmental Sciences, Nanjing Agricultural University, Nanjing 210095, China;Jiangsu Provincial Key Laboratory of Marine Biology, College of Resources and Environmental Sciences, Nanjing Agricultural University, Nanjing 210095, China;Zhejiang Key Laboratory of Exploitation and Preservation of Coastal Bio-resource, Wenzhou 325005, China;Jiangsu Provincial Key Laboratory of Marine Biology, College of Resources and Environmental Sciences, Nanjing Agricultural University, Nanjing 210095, China;College of Oceanography, Huaihai Institute of Technology, Lianyungang 222005, China;Jiangsu Provincial Key Laboratory of Marine Biology, College of Resources and Environmental Sciences, Nanjing Agricultural University, Nanjing 210095, China;Jiangsu Provincial Key Laboratory of Marine Biology, College of Resources and Environmental Sciences, Nanjing Agricultural University, Nanjing 210095, China;Jiangsu Provincial Key Laboratory of Marine Biology, College of Resources and Environmental Sciences, Nanjing Agricultural University, Nanjing 210095, China |
| Abstract: | Cadmium pollution is one of the most extensive and harmful environmental problems all over the world.In recent years,with the continuous economic development,pollution by cadmium and other heavy metals in the coastal water body is becoming more serious.To investigate macroalgae physiological response to heavy metals and its resistant mechanisms,experiments were carried out to study the effects of different cadmium levels on growth,Chlorophyll(Chl) and Carotenoid(Car) contents,Chlorophyll fluorescence parame... |
| Keywords: | Enteromorpha clathrata Enteromorpha linza cadmium stress growth chlorophyll fluorescence parameters |
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