Effect of Small-Scale Turbulence on the Physiology and Morphology of Two Bloom-Forming Cyanobacteria

doi:10.1371/journal.pone.0168925

CORC > 重庆绿色智能技术研究院 > 中国科学院重庆绿色智能技术研究院 > 水质生物转化研究中心

	Effect of Small-Scale Turbulence on the Physiology and Morphology of Two Bloom-Forming Cyanobacteria
	Xiao, Yan1 ; Li, Zhe1 ; Li, Chao 2; Zhang, Zhen 1; Guo, Jinsong 1
刊名	PLOS ONE
	2016-12-30
卷号	11 期号:12 页码:14
ISSN号	1932-6203
DOI	10.1371/journal.pone.0168925
通讯作者	Li, Z (reprint author), Chinese Acad Sci, Key Lab Reservoir Water Environm, Chongqing Inst Green & Intelligent Technol, Chongqing, Peoples R China.
英文摘要	The main goal of the present work is to test the hypothesis that small-scale turbulence affected physiological activities and the morphology of cyanobacteria in high turbulence environments. Using quantified turbulence in a stirring device, we conducted one set of experiments on cultures of two strains of cyanobacteria with different phenotypes; i.e., unicellular Microcystis flos-aquae and colonial Anabaena flos-aquae. The effect of small-scale turbulence examined varied from 0 to 8.01x10(-2) m(2) s(-3), covering the range of turbulence intensities experienced by cyanobacteria in the field. The results of photosynthesis activity and the cellular chlorophyll a in both strains did not change significantly among the turbulence levels, indicating that the potential indirect effects of a light regime under the gradient of turbulent mixing could be ignored. However, the experiments demonstrated that small-scale turbulence significantly modulated algal nutrient uptake and growth in comparison to the stagnant control. Cellular N and C of the two stains showed approximately the same responses, resulting in a similar pattern of C/N ratios. Moreover, the change in the phosphate uptake rate was similar to that of growth in two strains, which implied that growth characteristic responses to turbulence may be dependent on the P strategy, which was correlated with accumulation of polyphosphate. Additionally, our results also showed the filament length of A. flos-aquae decreased in response to high turbulence, which could favor enhancement of the nutrient uptake. These findings suggested that both M. flos-aquae and A. flos-aquae adjust their growth rates in response to turbulence levels in the ways of asynchronous cellular stoichiometry of C, N, and P, especially the phosphorus strategy, to improve the nutrient application efficiency. The fact that adaptation strategies of cyanobacteria diversely to turbulence depending on their physiological conditions presents a good example to understand the direct cause-effect relationship between hydrodynamic forces and algae.
资助项目	National Natural Science Foundation[51309220] ; National Natural Science Foundation[51679226] ; Chongqing Natural Science Program[cstc2015jcyjBX0006] ; Western Action Program[KZCX2-XB3-14]
WOS研究方向	Science & Technology - Other Topics
语种	英语
出版者	PUBLIC LIBRARY SCIENCE
WOS记录号	WOS:000391229300039
内容类型	期刊论文
源URL	[http://119.78.100.138/handle/2HOD01W0/3213]
专题	水质生物转化研究中心
通讯作者	Li, Zhe
作者单位	1.Chinese Acad Sci, Key Lab Reservoir Water Environm, Chongqing Inst Green & Intelligent Technol, Chongqing, Peoples R China 2.East China Univ Sci & Technol, Coll Biotechnol, State Key Lab Bioreactor Engn, Shanghai, Peoples R China
推荐引用方式 GB/T 7714	Xiao, Yan,Li, Zhe,Li, Chao,et al. Effect of Small-Scale Turbulence on the Physiology and Morphology of Two Bloom-Forming Cyanobacteria[J]. PLOS ONE,2016,11(12):14.
APA	Xiao, Yan,Li, Zhe,Li, Chao,Zhang, Zhen,&Guo, Jinsong.(2016).Effect of Small-Scale Turbulence on the Physiology and Morphology of Two Bloom-Forming Cyanobacteria.PLOS ONE,11(12),14.
MLA	Xiao, Yan,et al."Effect of Small-Scale Turbulence on the Physiology and Morphology of Two Bloom-Forming Cyanobacteria".PLOS ONE 11.12(2016):14.