| 引用本文: | 管乐,张民,赵兴青.微囊藻(FACHB-905)和鱼腥藻(FACHB-82)响应温度变化的功能特性权衡.湖泊科学,2020,32(1):134-143. DOI:10.18307/2020.0113 |
| GUAN Yue,ZHANG Min,ZHAO Xingqing.The trade-offs of functional traits in Microcystis (FACHB-905) and Anabaena (FACHB-82) responding to temperature. J. Lake Sci.2020,32(1):134-143. DOI:10.18307/2020.0113 |
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| 摘要: |
| 微囊藻和鱼腥藻是水华蓝藻的两个主要类群，两种藻均可调节自身形态及生理特性来维持快速生长，这也是两个类群蓝藻水华维持的基础.本研究分析了微囊藻（FACHB-905）和鱼腥藻（FACHB-82）生长、形态及叶绿素荧光参数对温度变化的响应，以及生长与特性间的权衡关系.结果显示：该微囊藻细胞直径随温度升高而降低，但是比增长速率维持稳定，表明在高温条件下，其可能通过减小细胞大小的方式维持比增长速率；该鱼腥藻在不同温度下，平均细胞直径和藻丝长度呈现显著变化，高温条件下，其维持较高的比增长速率，但是细胞直径增大，藻丝长度缩短，这可能是其调节自身形态以维持较高比增长速率的方式.该微囊藻和鱼腥藻分别在细胞较大和较小时，藻细胞潜在的光化学效率更高.本研究表明这两种蓝藻可以通过权衡藻细胞形态、生理特性两者与生长速率之间的关系来适应温度的变化以达到自身最佳的生长状态，微囊藻（FACHB-905）通过调节细胞大小和光合活性来维持生长优势，而鱼腥藻（FACHB-82）则通过细胞大小、藻丝长度和光合活性的调节来维持生长优势.本研究的结果有助于提升对于水华蓝藻生长维持机制的认识. |
| 关键词: 微囊藻 鱼腥藻 温度 权衡 藻丝长度 |
| DOI：10.18307/2020.0113 |
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| 基金项目:国家自然科学基金项目（31870447）和国家水体污染控制与治理科技重大专项（2017ZX07603-005，2018ZX07208-04）联合资助. |
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| The trade-offs of functional traits in Microcystis (FACHB-905) and Anabaena (FACHB-82) responding to temperature |
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GUAN Yue1, ZHANG Min2, ZHAO Xingqing1
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1.School of Environmental and Safety Engineering, Changzhou University, Changzhou 213164, P. R. China;2.State Key Laboratory of Lake Science and Environment, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing 210008, P. R. China
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| Abstract: |
| Microcystis and Anabaena are two major genera of bloom-forming cyanobacteria. The way in which the two cyanobacteria regulate their own morphology and physiological characteristics to maintain rapid growth is to explain the maintenance of two cyanobacteria blooms. In this study, the response of growth, morphological and photosynthetic characteristics of Microcystis (FACHB-905) and Anabaena (FACHB-82) to temperature changes were measured, and the trade-offs relationship between growth and these characteristics were analyzed. The results showed that the cell diameter of Microcystis decreased under high temperature, but the growth rate did not decrease under high temperature. These indicates that Microcystis could increase the growth rate by reducing the cell size under high temperature conditions. The cell diameter and the chain length of Anabaena changed significantly with the change of temperature. The chain length decreased significantly and the growth rate did not decrease under high temperature conditions, which suggests that Anabaena might regulate its morphological characteristics to maintain the high growth rate. At the same time, the specific growth rate of the two algae has a certain relationship with the photochemical activity, indicating that the two algae can adapt to the temperature change by weighing the relationship between their own morphology, photosynthetic characteristics and growth rate to obtain the best growth status. This study will be helpful to improve our understanding for the growth mechanism of cyanobacteria. |
| Key words: Microcystis Anabaena temperature trade-off chain length |
