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湖泊科学  2011 

人工模拟UV-B辐射对铜绿微囊藻(Microcystisaeruginosa)生长的影响

DOI: 10.18307/2011.0210

Keywords: 铜绿微囊藻,UV-B辐射,超微结构,生物量,

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Abstract:

选择我国蓝藻水华的优势藻类铜绿微囊藻,进行人丁模拟UV-B辐射连续24h照射实验,测定铜绿微囊藻生物量、生理及超微结构指标,探讨湖泊特别是高原湖泊藻类生长对UV-B辐射增强的胁迫响应.结果表明,当辐射时间达到1h时,铜绿微囊藻便开始陆续死亡,但蛋白质含量增加,且叶绿素a浓度保持稳定;当辐射时间少于4h时.细胞内超氧化物歧化酶(SOD)始终保持较高活性,细胞膜保持基本完整,细胞内类囊体和蓝藻素颗粒数目保持稳定;当辐射时间超过4h后,微囊藻叶绿素a浓度和SOD酶活性等开始快速下降.研究表明,连续辐射4h是铜绿微囊藻可抗逆的极限。

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