Different tolerances and responses to low temperature and darkness between waterbloom forming cyanobacterium Microcystis and a green alga Scenedesmus
文献类型：期刊论文
| 作者 | Wu, Zhongxing; Song, Lirong; Li, Renhui |
| 刊名 | HYDROBIOLOGIA
 |
| 出版日期 | 2008 |
| 卷号 | 596期号:0页码:47-55 |
| 关键词 | darkness low temperature response tolerance Microcystis Scenedesmus |
| ISSN号 | 0018-8158 |
| 通讯作者 | Li, RH, Chinese Acad Sci, Inst Hydrobiol, Wuhan 430072, Hubei, Peoples R China |
| 中文摘要 | The dynamics of planktonic cyanobacteria in eutrophicated freshwaters play an important role in formation of annual summer blooms, yet overwintering mechanisms of these water bloom forming cyanobacteria remain unknown. The responses to darkness and low temperature of three strains (unicellular Microcystis aeruginosa FACHB-905, colonial M. aeruginosa FACHB-938, and a green alga Scenedesmus quadricauda FACHB-45) were investigated in the present study. After a 30-day incubation under darkness and low temperature, cell morphology, cell numbers, chlorophyll a, photosynthetic activity (ETRmax and I-k), and malodialdehyde (MDA) content exhibited significant changes in Scenedesmus. In contrast, Microcystis aeruginosa cells did not change markedly in morphology, chlorophyll a, photosynthetic activity, and MDA content. The stress caused by low temperature and darkness resulted in an increase of the antioxidative enzyme-catalase (CAT) in all three strains. When the three strains re-grew under routine cultivated condition subjected to darkness and low temperature, specific growth rate of Scenedesmus was lower than that of Microcystis. Flow cytometry (FCM) examination indicated that two distinct types of metabolic response to darkness and low temperature existed in the three strains. The results from the present study reveal that the cyanobacterium Microcystis, especially colonial Microcystis, has greater endurance and adaptation ability to the stress of darkness and low temperature than the green alga Scenedesmus. |
| 英文摘要 | The dynamics of planktonic cyanobacteria in eutrophicated freshwaters play an important role in formation of annual summer blooms, yet overwintering mechanisms of these water bloom forming cyanobacteria remain unknown. The responses to darkness and low temperature of three strains (unicellular Microcystis aeruginosa FACHB-905, colonial M. aeruginosa FACHB-938, and a green alga Scenedesmus quadricauda FACHB-45) were investigated in the present study. After a 30-day incubation under darkness and low temperature, cell morphology, cell numbers, chlorophyll a, photosynthetic activity (ETRmax and I-k), and malodialdehyde (MDA) content exhibited significant changes in Scenedesmus. In contrast, Microcystis aeruginosa cells did not change markedly in morphology, chlorophyll a, photosynthetic activity, and MDA content. The stress caused by low temperature and darkness resulted in an increase of the antioxidative enzyme-catalase (CAT) in all three strains. When the three strains re-grew under routine cultivated condition subjected to darkness and low temperature, specific growth rate of Scenedesmus was lower than that of Microcystis. Flow cytometry (FCM) examination indicated that two distinct types of metabolic response to darkness and low temperature existed in the three strains. The results from the present study reveal that the cyanobacterium Microcystis, especially colonial Microcystis, has greater endurance and adaptation ability to the stress of darkness and low temperature than the green alga Scenedesmus. |
| WOS标题词 | Science & Technology ; Life Sciences & Biomedicine |
| 学科主题 | Marine & Freshwater Biology |
| 类目[WOS] | Marine & Freshwater Biology |
| 研究领域[WOS] | Marine & Freshwater Biology |
| 关键词[WOS] | METABOLIC-ACTIVITY ; STRESS TOLERANCE ; AERUGINOSA ; PHOTOSYNTHESIS ; SURVIVAL ; GROWTH ; SUSCEPTIBILITY ; CHLOROPHYCEAE ; CYANOPHYCEAE ; RESPIRATION |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000251729800005 |
| 公开日期 | 2010-10-13 |
| 源URL | [http://ir.ihb.ac.cn/handle/152342/8336]  |
| 专题 | 水生生物研究所_中科院水生所知识产出（2009年前）_期刊论文 |
| 作者单位 | Chinese Acad Sci, Inst Hydrobiol, Wuhan 430072, Hubei, Peoples R China |
| 推荐引用方式 GB/T 7714 | Wu, Zhongxing,Song, Lirong,Li, Renhui. Different tolerances and responses to low temperature and darkness between waterbloom forming cyanobacterium Microcystis and a green alga Scenedesmus[J]. HYDROBIOLOGIA,2008,596(0):47-55. |
| APA | Wu, Zhongxing,Song, Lirong,&Li, Renhui.(2008).Different tolerances and responses to low temperature and darkness between waterbloom forming cyanobacterium Microcystis and a green alga Scenedesmus.HYDROBIOLOGIA,596(0),47-55. |
| MLA | Wu, Zhongxing,et al."Different tolerances and responses to low temperature and darkness between waterbloom forming cyanobacterium Microcystis and a green alga Scenedesmus".HYDROBIOLOGIA 596.0(2008):47-55. |
入库方式： OAI收割
来源：水生生物研究所
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