不同氮、磷浓度对铜绿微囊藻生长、光合及产毒的影响

被引:42
作者
张玮
林一群
郭定芳
付君君
赵以军
机构
[1] 华中师范大学生命科学学院
关键词
铜绿微囊藻; 铵氮、正磷酸盐; 生长; 叶绿素荧光; 微囊藻毒素;
D O I
暂无
中图分类号
X173 [环境植物学];
学科分类号
071012 ; 0713 ;
摘要
对一株从野外分离得到的铜绿微囊藻产毒株进行分批培养,在不同的氮磷条件下研究其生长、光合荧光及毒素含量的变化。结果表明:正磷酸盐浓度不变时,铵氮浓度的改变对铜绿微囊藻的生长有明显影响。叶绿素a(Chl.a)含量在铵氮浓度为1.83—18.3mg/L时明显较大;微囊藻毒素(包括MC-LR和MC-RR)的含量在铵氮浓度为1.83mg/L时达到最大;当铵氮浓度为0—1.83mg/L时,随着铵氮浓度升高,可变荧光FV和MC的产量均增大,同时MC异构体的种类增多;铵氮浓度过大对M.aeruginosa的生长、生理和产毒均有抑制作用。在另一组实验中,即铵氮浓度不变而正磷酸盐浓度增大时,Chl.a含量呈总体下降的趋势,并且与FV/Fm呈显著正相关关系(P<0.01,r=0.97),MC(MC-LR和MC-RR)的含量在正磷酸盐浓度小于0.56mg/L时明显升高,MC-LR与FV/Fm呈显著正相关关系(P<0.01,r=0.967)。
引用
收藏
页码:318 / 322
页数:5
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