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引用本文:杨小龙,刘莉华,毕永红,王洵,董薇,邓自发,王寿兵.蓝藻光合氮同化的特征与分子调控机理研究进展.湖泊科学,2023,35(3):766-779. DOI:10.18307/2023.0301
Yang Xiaolong,Liu Lihua,Bi Yonghong,Wang Xun,Dong Wei,Deng Zifa,Wang Shoubing.Progress on photosynthetic nitrogen assimilation and its regulatory mechanisms in cyanobacteria. J. Lake Sci.2023,35(3):766-779. DOI:10.18307/2023.0301
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蓝藻光合氮同化的特征与分子调控机理研究进展
杨小龙1, 刘莉华2, 毕永红3, 王洵1, 董薇1, 邓自发1, 王寿兵4
1.南通大学生命科学学院, 南通 226019;2.江苏思源环境修复有限公司, 南通 226007;3.中国科学院水生生物研究所, 武汉 430072;4.复旦大学环境科学与工程系, 上海 200438
摘要:
水华蓝藻的生物学特性及其竞争优势、蓝藻水华的形成与维持机制等科学问题,一直是国内外研究的热点。氮素是诱发蓝藻水华暴发的重要营养盐,蓝藻对氮素的同化与其光合作用密切偶联。然而,水体中氮素存在多种形态,不同形态氮素对蓝藻生长和水华发生的影响具有显著差异。因此,了解蓝藻光合作用特征及其同化不同形态氮素的机制和策略,对深入理解蓝藻水华的发生机理具有重要意义。本文在蓝藻的光能捕获与激发能转移、光合电子传递、碳浓缩机制及CO2同化等光合作用过程及其特征综述的基础上,对蓝藻摄取、同化5种主要氮素形态(NO3-、NO2-、NH4+、尿素和N2)的分子机制及其特征进行了解读,总结了蓝藻细胞光合碳、氮同化的耦合关系及调控机制;并指出了该领域的未来发展方向,以推动该方向的深入研究。
关键词:  蓝藻  光合作用  氮素同化  碳氮代谢平衡  蓝藻水华
DOI:10.18307/2023.0301
分类号:
基金项目:国家重点研发计划项目(2020YFA0907402)、江苏省“双创博士”高校创新类项目(JSSCBS20211133)、南通市科技计划项目(JC2021162)和国家级大学生创新创业训练计划(202110304021)联合资助。
Progress on photosynthetic nitrogen assimilation and its regulatory mechanisms in cyanobacteria
Yang Xiaolong1, Liu Lihua2, Bi Yonghong3, Wang Xun1, Dong Wei1, Deng Zifa1, Wang Shoubing4
1.School of Life Sciences, Nantong University, Nantong 226019, P. R. China;2.Jiangsu Siyuan Environmental Remediation & Restoration Co., Ltd., Nantong 226007, P. R. China;3.Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, P. R. China;4.Department of Environmental Science and Engineering, Fudan University, Shanghai 200438, P. R. China
Abstract:
The biological characteristics and competitive predominance of cyanobacteria, as well as the formation and maintenance mechanism of cyanobacteria blooms, have aroused continuous interests among researchers. As an important nutrient for cyanobacterial growth, the assimilation of nitrogen is intimately coupled with the photosynthesis. However, nitrogen exists in various chemical forms in water, which affect the cyanobacterial growth and the formation of blooms in distinct ways. To delve into the formation mechanism of cyanobacterial blooms, it is important to understand the cyanobacterial photosynthetic feature as well as the mechanism and strategy by which the nitrogen of different forms are assimilated into cyanobacteria. This paper reviewed the processes and characteristics of photosynthesis in cyanobacteria, such as light energy capture and excitation energy transfer, primary photosynthetic reaction, CO2 concentrating mechanism and assimilation. Then, it illustrated the transport and assimilation of different nitrogen forms (NO3-, NO2-, NH4+, urea and N2), the regulation of these processes, as well as the mechanisms by which cells coordinate and regulate the carbon/nitrogen metabolism. The paper also summarized the latest research advances in cyanobacterial blooms and suggested on the content and direction of further research.
Key words:  Cyanobacteria  photosynthesis  nitrogen assimilation  carbon nitrogen homeostasis  cyanobacterial blooms
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