Knowledge Resource Center for Ecological Environment in Arid Area
DOI | 10.1016/j.chemosphere.2021.132878 |
Nitrogen concentration acting as an environmental signal regulates cyanobacterial EPS excretion | |
Qian, Long; Ye, Xingwang; Xiao, Jingshang; Lin, Simeng; Wang, Hongyu; Liu, Zhe; Ma, Yongfei; Yang, Lie; Zhang, Zulin; Wu, Li | |
通讯作者 | Wu, L (corresponding author),Wuhan Univ Technol, Sch Resources & Environm Engn, Wuhan 430072, Peoples R China. |
来源期刊 | CHEMOSPHERE |
ISSN | 0045-6535 |
EISSN | 1879-1298 |
出版年 | 2022 |
卷号 | 291 |
英文摘要 | As an important carbon (C) storage in biological soil crusts (BSCs), exopolysaccharides (EPSs) are not only a part of the desert C cycle, but also the key materials for cyanobacteria to resist desert stress. In this study, the influence of initial N concentrations (10, 25 and 50 mg L-1 designated as N10, N25 and N50 respectively) on Microcoleus vaginatusis growth and the excretion of EPSs including RPS (released exopolysaccharides) and CPS (capsule exopolysaccharides) were evaluated at different growth periods. In logarithmic period, higher ratio of biomass to EPSs indicated by (DW-CPS)/EPSs was observed in the N50 group with the highest N concentration (about 40 mg L-1) in the medium, while no difference was observed among the three groups in stationary period when the N concentrations of medium were lower than 25 mg L-1. The CPS/RPS showed similar results with (DW-CPS)/EPSs, and stayed higher than 1 in each group. Notably, obvious difference displayed in the monosaccharidic composition and morphologies between CPS and RPS, but not the N levels. The changes of C/N in cells at different growth period indicate that the excretion of EPSs, a mechanism that maintains the balance of cell C/N ratio, only works when the N in the environment is sufficient. Our results showed that, as the raw material and environmental signal, environmental N concentration regulates the elements (C and N) percentage of cyanobacterial cells and its EPSs excretion pattern, but not the monosaccharidic composition or the morphologies. These results also implied that, as the essential self-protecting materials, more EPSs with higher proportion of CPS would be excreted to response the low N environment. |
英文关键词 | Microcoleus vaginatus Nitrogen EPSs Monosaccharidic composition AFM |
类型 | Article |
语种 | 英语 |
收录类别 | SCI-E |
WOS记录号 | WOS:000758003900005 |
WOS关键词 | EXTRACELLULAR POLYMERIC SUBSTANCES ; BIOLOGICAL SOIL CRUSTS ; EXOCELLULAR POLYSACCHARIDES ; TOPOGRAPHICAL STRUCTURES ; DESICCATION TOLERANCE ; MICROCOLEUS-VAGINATUS ; PHOTOTROPHIC BIOFILMS ; BIODIESEL PRODUCTION ; SEMIARID ECOSYSTEMS ; LIGHT-INTENSITY |
WOS类目 | Environmental Sciences |
WOS研究方向 | Environmental Sciences & Ecology |
资源类型 | 期刊论文 |
条目标识符 | http://119.78.100.177/qdio/handle/2XILL650/376226 |
作者单位 | [Qian, Long; Ye, Xingwang; Xiao, Jingshang; Lin, Simeng; Wang, Hongyu; Liu, Zhe; Ma, Yongfei; Yang, Lie; Zhang, Zulin; Wu, Li] Wuhan Univ Technol, Sch Resources & Environm Engn, Wuhan 430072, Peoples R China; [Zhang, Zulin] James Hutton Inst, Aberdeen AB15 8QH, Scotland |
推荐引用方式 GB/T 7714 | Qian, Long,Ye, Xingwang,Xiao, Jingshang,et al. Nitrogen concentration acting as an environmental signal regulates cyanobacterial EPS excretion[J],2022,291. |
APA | Qian, Long.,Ye, Xingwang.,Xiao, Jingshang.,Lin, Simeng.,Wang, Hongyu.,...&Wu, Li.(2022).Nitrogen concentration acting as an environmental signal regulates cyanobacterial EPS excretion.CHEMOSPHERE,291. |
MLA | Qian, Long,et al."Nitrogen concentration acting as an environmental signal regulates cyanobacterial EPS excretion".CHEMOSPHERE 291(2022). |
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