| 不同价态砷对斜生栅藻生长及叶绿素荧光的影响 |
| Effect of arsenic species on the growth and chlorophyll fluorescence characteristics of Scenedesmus obliquus |
| 投稿时间：2013-04-28 修订日期：2013-05-31 |
| DOI： |
| 中文关键词:砷 斜生栅藻 生长 叶绿素荧光 |
| 英文关键词:arsenic Scenedesmus obliquus growth chlorophyll fluorescence |
| 基金项目:武汉市学科带头人计划项目（201051730562）——长江中下游浅水湖泊稳态转换及其调控机制的实验生态学研究；中国科学院水生生物研究所淡水生态与生物技术国家重点实验室开放基金（2012FB21）。 |
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| 中文摘要: |
| 对比研究了不同浓度As(Ⅲ)和As(Ⅴ)对斜生栅藻（Scenedesmus obliquus）生长及叶绿素荧光特性的影响。试验表明，较高浓度（≥500 μM/L）时，As(Ⅲ)对栅藻生长速率的影响大于As(Ⅴ)。对叶绿素a含量影响表明，随着砷浓度的增加，栅藻叶绿素a含量呈现降低趋势；2种价态之间表现为叶绿素a对于As(Ⅲ)浓度的变化更为敏感。2种价态对斜生栅藻光合系统II主要荧光参数Fv/Fm( PSII的最大光化学量子产量) 、Yield(PSII 的实际光能转化效率)以及ETRmax（PSII最大电子传递速率） 均与砷浓度呈显著的负相关。研究结果表明，砷对斜生栅藻产生的抑制作用与对光合系统产生的抑制相一致，并且As(Ⅲ)对叶绿素荧光产生的抑制作用要大于As(Ⅴ)。 |
| 英文摘要: |
| The effects of different concentrations of As (III) and As (Ⅴ) on the growth and chlorophyll fluorescence characteristics of Scenedesmus obliquus were investigated. Under the condition of high concentration (≥500 μM/L), the inhibition of As (III) on growth rate of S. obliquus is greater than As (V). The influence of arsenic on the content of chlorophyll a showed that, chlorophyll a content of S. obliquus showed a decreasing tendency with the increase of arsenic concentration. the effect between two arsenic species showed that the chlorophyll a is more sensitive to As (Ⅲ) than As (V). The correlation analysis showed that the main chlorophyll fluorescence parameters (Fv/Fm, Yield, ETRmax) were negatively correlated with the concentrations of two species arsenic. The study showed that the inhibitory effect of arsenic on S. obliquus is consistent with the inhibition on photosynthetic system, and As (III) inhibitory effect on chlorophyll fluorescence than As (Ⅴ). |
| 樊香绒,尹黎燕,李 伟,常锋毅.2013.不同价态砷对斜生栅藻生长及叶绿素荧光的影响[J].水生态学杂志,34(5):60-64. |
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