Heterogeneity of buoyancy in response to light between two buoyant types of cyanobacterium Microcystis
文献类型：期刊论文
| 作者 | Xiao, Yan1,2; Gan, Nanqin1; Liu, Jin1; Zheng, Lingling1; Song, Lirong1 |
| 刊名 | HYDROBIOLOGIA
 |
| 出版日期 | 2012 |
| 卷号 | 679期号:1页码:297-311 |
| 关键词 | Buoyancy Colonial Microcystis Heterogeneity Light Vertical migration |
| ISSN号 | 0018-8158 |
| 通讯作者 | Song, LR (reprint author), Chinese Acad Sci, State Key Lab Freshwater Ecol & Biotechnol, Inst Hydrobiol, Wuhan 430072, Peoples R China |
| 中文摘要 | Previous investigations suggested that buoyancy state in response to light differed between individuals within natural populations of cyanobacteria. To understand the mechanisms of heterogeneity of buoyancy in different species/strains in relation to light, two types of colonial Microcystis in different buoyancy behavior were selected and used to compare their photosynthetic activity, gas vesicle volume, ballast mass, and migration at varying light regime. The photosynthesis-irradiance curve and F (v)/F (m) examination indicated that negatively buoyant strains were more adapted at high irradiance than buoyant ones. Transcription levels of gvp gene and gas vesicle volume decreased in buoyant strains, but increased in negatively buoyant ones at high irradiance. The results indicated that the combination effect of decrease in gas vesicle buoyancy and increase in carbohydrate contributed to the downward migration of buoyant strains, while the significant increase of gas vesicles provided sufficient buoyancy to negate ballast mass, resulting in the upward migration of negatively buoyant ones at high irradiance. In addition, either sinking or floating velocities were elevated in buoyant and negatively buoyant strains, coincidently with the colony enlargement of all strains at high irradiance, respectively. These findings suggest that this heterogeneity was associated with the interplay between gas vesicles, ballast, and colony size. The fact that different species/strains of Microcystis respond diversely to light depending on their physiological conditions presents a good example to understand heterogeneity of buoyancy in the field, and the presence of heterogeneity of buoyancy may be implicated in the dominancy and persistence of Microcystis bloom in ever-changing environment. |
| 英文摘要 | Previous investigations suggested that buoyancy state in response to light differed between individuals within natural populations of cyanobacteria. To understand the mechanisms of heterogeneity of buoyancy in different species/strains in relation to light, two types of colonial Microcystis in different buoyancy behavior were selected and used to compare their photosynthetic activity, gas vesicle volume, ballast mass, and migration at varying light regime. The photosynthesis-irradiance curve and F (v)/F (m) examination indicated that negatively buoyant strains were more adapted at high irradiance than buoyant ones. Transcription levels of gvp gene and gas vesicle volume decreased in buoyant strains, but increased in negatively buoyant ones at high irradiance. The results indicated that the combination effect of decrease in gas vesicle buoyancy and increase in carbohydrate contributed to the downward migration of buoyant strains, while the significant increase of gas vesicles provided sufficient buoyancy to negate ballast mass, resulting in the upward migration of negatively buoyant ones at high irradiance. In addition, either sinking or floating velocities were elevated in buoyant and negatively buoyant strains, coincidently with the colony enlargement of all strains at high irradiance, respectively. These findings suggest that this heterogeneity was associated with the interplay between gas vesicles, ballast, and colony size. The fact that different species/strains of Microcystis respond diversely to light depending on their physiological conditions presents a good example to understand heterogeneity of buoyancy in the field, and the presence of heterogeneity of buoyancy may be implicated in the dominancy and persistence of Microcystis bloom in ever-changing environment. |
| WOS标题词 | Science & Technology ; Life Sciences & Biomedicine |
| 类目[WOS] | Marine & Freshwater Biology |
| 研究领域[WOS] | Marine & Freshwater Biology |
| 关键词[WOS] | PHOSPHATE-LIMITED CULTURES ; BLOOM-FORMING MICROCYSTIS ; GAS VESICLE COLLAPSE ; ANABAENA-FLOS-AQUAE ; VERTICAL MIGRATION ; TURGOR PRESSURE ; CELL BUOYANCY ; AERUGINOSA ; LAKE ; PHYTOPLANKTON |
| 收录类别 | SCI |
| 资助信息 | National Key Project for Basic Research[2008CB418001, 2008CB418006]; National Natural Science Foundation of China[31070355]; Natural Science Foundation of China[U0833604] |
| 语种 | 英语 |
| WOS记录号 | WOS:000297620100020 |
| 公开日期 | 2012-04-01 |
| 源URL | [http://ir.ihb.ac.cn/handle/342005/16777]  |
| 专题 | 水生生物研究所_藻类生物学及应用研究中心_期刊论文 |
| 作者单位 | 1.Chinese Acad Sci, State Key Lab Freshwater Ecol & Biotechnol, Inst Hydrobiol, Wuhan 430072, Peoples R China 2.Chinese Acad Sci, Grad Sch, Wuhan 430072, Peoples R China |
| 推荐引用方式 GB/T 7714 | Xiao, Yan,Gan, Nanqin,Liu, Jin,et al. Heterogeneity of buoyancy in response to light between two buoyant types of cyanobacterium Microcystis[J]. HYDROBIOLOGIA,2012,679(1):297-311. |
| APA | Xiao, Yan,Gan, Nanqin,Liu, Jin,Zheng, Lingling,&Song, Lirong.(2012).Heterogeneity of buoyancy in response to light between two buoyant types of cyanobacterium Microcystis.HYDROBIOLOGIA,679(1),297-311. |
| MLA | Xiao, Yan,et al."Heterogeneity of buoyancy in response to light between two buoyant types of cyanobacterium Microcystis".HYDROBIOLOGIA 679.1(2012):297-311. |
入库方式： OAI收割
来源：水生生物研究所
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