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| 不同盐度下水华束丝藻对CO2浓度倍增的生理响应 | |
| 引用本文： | 康丽娟,刘永梅,李敦海,刘永定.不同盐度下水华束丝藻对CO2浓度倍增的生理响应[J].水生生物学报,2007,31(5):1-674. |
| 作者姓名： | 康丽娟 刘永梅 李敦海 刘永定 |
| 作者单位： | 1. 中国科学院水生生物研究所,武汉,430072;中国科学院研究生院,北京,100039 2. 中国科学院水生生物研究所,武汉,430072;武汉大学药学院,武汉,430072 3. 中国科学院水生生物研究所,武汉,430072 |
| 摘 要： | 本文研究了在盐度分别为2‰和4‰的条件下,CO2浓度倍增对水华束丝藻(Aphanizomenon flos-aquae)生长速率、光合活性及光合色素比例与丙二醛含量的影响。结果表明随着盐度的增加水华束丝藻的生长速率和光合活性受到显著抑制,叶绿素a与藻蓝素比例大幅降低,丙二醛含量明显提高。在实验盐度范围内,CO2浓度倍增显著促进水华束丝藻的生长速率和最大光合电子传递速率(ETRmax)与色素比例,而且盐度越高促进效果越明显。此外CO2浓度倍增能显著降低丙二醛(MDA)含量。从而减少膜脂过氧化,缓解盐度胁迫。 |
| 关 键 词： | CO2浓度倍增 盐胁迫 光合活性 丙二醛 |
| 文章编号： | 1000-3207（2007）05-0671-04 |
| 修稿时间： | 2006-01-04 |
Co-effect of Doubled CO2 and Salinity on Some Physiological Characteristics of Aphanizomenon flos-aquae |
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| KANG Li-Juan,LIU Yong-Mei,LI Dun-Hai,LIU Yong-Ding.Co-effect of Doubled CO2 and Salinity on Some Physiological Characteristics of Aphanizomenon flos-aquae[J].Acta Hydrobiologica Sinica,2007,31(5):1-674. | |
| Authors: | KANG Li-Juan LIU Yong-Mei LI Dun-Hai LIU Yong-Ding |
| Institution: | 1. Institute of Hydrobiology, the Chinese Academy of Sciences, Wuhan 430072 ; 2. Graduate school of the Chinese Academy of Sciences, Belling, 100039 ; 3. College of Pharmacy Wuhan University, Wuhan 430072 |
| Abstract: | Aphanizomenon flos-aquae bloom appears regularly nearly at March in recent years.In order to investigate the response of the cyanobacterium A.flos-aquae to the combination of doubled CO2 concentration and salinity,an experiment was carried out.Growth rate,photosynthesis,maximal electron transport rate(ETRmax),the ratio of photosynthetic pigment chlorophyll a to phycocyanin(Chla/PC) and malondialdehyde(MDA) levels of A.flos-aquae were analyzed.The results demonstrated that salt stress caused decrease in A.flos-aquae growth by disrupting physiological processes,especially photosynthesis.Increased salinity lowered ETRmax.MDA content was increased when salinity elevated.And higher salinity has more distinct effect.Growth rate,ETRmax and Chla/PC could be enhanced by elevated CO2 concentration,while doubled CO2 reduced MDA content. |
| Keywords: | Doubled CO2 Salinity ETRmax MDA |
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