光学学报, 2013, 33 (s1): s130002, 网络出版: 2013-06-07  

铜绿微囊藻各生长阶段毒素释放的动态规律

Dynamic Law of Microcystin Released by Microcystis Aeraginosa in Different Growth Periods
作者单位
中国科学院安徽光学精密机械研究所中国科学院环境光学与技术重点实验室, 安徽 合肥 230031
摘要
利用BG-11培养基对铜绿微囊藻进行100 d左右的实验室培养,研究了铜绿微囊藻不同生长阶段藻毒素MC-LR释放的动态变化规律。结果表明:BG-11培养基培养的铜绿微囊藻叶绿素a浓度最大值出现的时间比外藻毒素MC-LR浓度最大值出现的时间提前约10 d;铜绿微囊藻在各自不同生长阶段表现出一定的外藻毒素MC-LR释放的动态规律,即对数期时叶绿素a浓度和MC-LR浓度呈现正相关,稳定期前期叶绿素a和MC-LR浓度呈现负相关,衰亡期叶绿素a降低,而MC-LR浓度则先增加后降低。这种规律性可能与细胞体内色素释放到培养基中催化外藻毒素MC-LR的光降解的特性有着密切联系。对实验室培养的纯种产毒铜绿微囊藻各生长阶段叶绿素a浓度和外藻毒素MC-LR浓度进行了线性拟合,为进一步利用叶绿素a浓度粗略估计水体藻毒素MC-LR浓度提供理论依据。
Abstract
Microcystis aeraginosa is cultivated in BG-11 medium and nature water for 100 d. Dynamic law of microcystic toxins MC-LR released by microcystis aeraginosa in different growth phrases is studied. The results show: the chlorophyll-a concentration maximum of microcystis aeraginosa appears 10 d ealier than the MC-LR concentration maximum, whatever algal is cultivated in BG-11 culture medium and nature water. Similar dynamic laws showe in both culture medium are that chlorophyll-a concentration and MC-LR concentration are positively corelated in the logarithmic period and negatively correlated in the stabilization period, and chlorophyll-a concentration reduces while MC-LR concentration first increases, then decreases in the decline period. This regularity maybe closely linked to the characteristics that pigment in vivo cells released into medium could catalytic MC-LR photodegradation. The linear relationship from fitting between the chlorophyll-a concentration and MC-LR concentration, of purebred microcystis aeraginosa cultivated in laboratory condition, is used to provide a basis of approximately estimating microcystic toxins MC-LR concentration by chlorophyll-a concentration of water.

段静波, 刘文清, 张玉钧, 赵南京, 王志刚, 殷高方, 肖雪, 方丽. 铜绿微囊藻各生长阶段毒素释放的动态规律[J]. 光学学报, 2013, 33(s1): s130002. Duan Jingbo, Liu Wenqing, Zhang Yujun, Zhao Nanjing, Wang Zhigang, Yin Gaofang, Xiao Xue, Fang Li. Dynamic Law of Microcystin Released by Microcystis Aeraginosa in Different Growth Periods[J]. Acta Optica Sinica, 2013, 33(s1): s130002.

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