中国科学院机构知识库网格
Chinese Academy of Sciences Institutional Repositories Grid
首页 机构 成果 学者
  
  1. CAS IR Grid
  2. 重庆绿色智能技术研究院
  3. 中国科学院重庆绿色智能技术研究院
Insights into the role of external layers in cyanobacteria at varying temperatures and their regulatory mechanism

文献类型：期刊论文

作者Cheng, Yuran3,4; Li, Zhe3,4; Xiao, Yan3,4; Wu, Xinghua2; Liu, Liming1
刊名FRESHWATER BIOLOGY
出版日期2022-08-17
页码14
关键词atomic force microscopy cyanobacterial external layers genetic mechanism global warming physicochemical properties
ISSN号0046-5070
DOI10.1111/fwb.13982
通讯作者Xiao, Yan(yxiao@cigit.ac.cn)
英文摘要The dominance of cyanobacteria and their adaptability to changing climates might be attributed to their morphological plasticity related to external layers. The content of exopolysaccharides in cyanobacterial external layers has been shown to increase at elevated temperatures. However, the answers to the questions of why and how cyanobacteria adapt to varying temperatures by adjusting the physiological and biophysical properties of their external layers are still not clear. We cultivated three cyanobacterial strains, Nostoc sp. FACHB-2009, Dolichospermum sp. FACHB-82 and Microcystis sp. FACHB-3296, which are embedded in three typical types of external layers-sheath, capsule and slime, respectively--and each grown at three different temperatures (10 degrees C, 25 degrees C and 35 degrees C). The results showed that varying the temperature significantly changed the physicochemical properties of the external layers. High temperature conditions promoted increases in colony sizes compared to the control, with the external layers becoming thicker, looser and more adhesive, whereas cell sizes did not significantly change. Additionally, the expression patterns of related genes varied with temperature; it represents several temp dependent genes related to synthesis of nucleotide sugars were upregulated at high temperature but downregulated at low temperature. As the external layers are wrapped outside cells, we assumed a "spherical shell heat conduction model". Through that, we inferred that the presence of external layers influenced heat transfer in the cyanobacteria, thereby playing a role in stabilising cell activity at various temperatures. Transcriptome tests showed that the use of intracellularly stored nucleotide sugars for external layer synthesis was the preferred process for cyanobacteria at low temperature, whereas de novo external layer synthesis was the preferred process for cyanobacteria at high temperature.
资助项目National Natural Science Foundation of China[51979262] ; National Natural Science Foundation of China[51861125204] ; National Natural Science Foundation of China[51779240] ; Light of West programme from the Chinese Academy of Sciences ; Youth Innovation Promotion Association programme - Chinese Academy of Sciences ; Chongqing Natural Science Funds for Distinguished Young Scientists[cstc2020jcyj-jqX0010]
WOS研究方向Environmental Sciences & Ecology ; Marine & Freshwater Biology
语种英语
WOS记录号WOS:000841201900001
出版者WILEY
源URL[http://119.78.100.138/handle/2HOD01W0/16444]  
专题中国科学院重庆绿色智能技术研究院
通讯作者Xiao, Yan
作者单位1.Hubei Int Sci & Technol Cooperat Ctr Ecol Conserv, Yichang, Peoples R China
2.China Three Gorges Corp, Beijing, Peoples R China
3.Univ Chinese Acad Sci, Chongqing Sch, Chongqing, Peoples R China
4.Chinese Acad Sci, Chongqing Inst Green & Intelligent Technol, CAS Key Lab Reservoir Water Environm, Chongqing 400714, Peoples R China
推荐引用方式
GB/T 7714		 Cheng, Yuran,Li, Zhe,Xiao, Yan,et al. Insights into the role of external layers in cyanobacteria at varying temperatures and their regulatory mechanism[J]. FRESHWATER BIOLOGY,2022:14.
APA Cheng, Yuran,Li, Zhe,Xiao, Yan,Wu, Xinghua,&Liu, Liming.(2022).Insights into the role of external layers in cyanobacteria at varying temperatures and their regulatory mechanism.FRESHWATER BIOLOGY,14.
MLA Cheng, Yuran,et al."Insights into the role of external layers in cyanobacteria at varying temperatures and their regulatory mechanism".FRESHWATER BIOLOGY (2022):14.

入库方式： OAI收割

来源：重庆绿色智能技术研究院

浏览0
下载0
收藏0
其他版本

除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。