Enhancement of acid resistance of Scenedesmus dimorphus by acid adaptation

CORC > 青岛生物能源与过程研究所 > 中国科学院青岛生物能源与过程研究所 > 微藻生物技术团队

	Enhancement of acid resistance of Scenedesmus dimorphus by acid adaptation
	Jiang, Yinli; Peng, Xiaowei; Zhang, Wei; Liu, Tianzhong
刊名	JOURNAL OF APPLIED PHYCOLOGY
	2012-12-01
卷号	24 期号:6 页码:1637-1641
关键词	Acid adaptation Acid resistance Flue gas pH Scenedesmus dimorphus
中文摘要	When using flue gas as carbon source for microalgae cultivation, the resulting acidic environment caused by SO_X and NO_X can inhibit microalgal growth. In this study, Scenedesmus dimorphus acquired increased acid resistance by prior exposure to sublethal acid stress; a process defined as acid adaptation. Among the five algal species tested, S. dimorphus showed the highest level of acid tolerance to extreme acid challenge (exposure to pH 3.0). Non-adapted and acid-adapted exponential algal cells were used as inocula for tubular photobioreactors aerated with 2 % CO₂. Previously adapted at pH 4.0 for 1 h, S. dimorphus developed highest growth rate under extreme acidic condition, and the maximum biomass concentration and specific growth rate at pH 3.0 (3.638 ± 0.074 g L⁻¹ and 1.037 ± 0.008 d⁻¹, respectively) were respectively 14.22 and 10.79 % higher than those of non-adapted cells. Moreover, acid-adapted cells could tolerate lower pH of 2.5, at which the growth of non-adapted cells was totally inhibited. All the results indicated that acid adaptation was an effective approach for the acid resistance enhancement of microalgae.
英文摘要	When using flue gas as carbon source for microalgae cultivation, the resulting acidic environment caused by SO (X) and NO (X) can inhibit microalgal growth. In this study, Scenedesmus dimorphus acquired increased acid resistance by prior exposure to sublethal acid stress; a process defined as acid adaptation. Among the five algal species tested, S. dimorphus showed the highest level of acid tolerance to extreme acid challenge (exposure to pH 3.0). Non-adapted and acid-adapted exponential algal cells were used as inocula for tubular photobioreactors aerated with 2 % CO2. Previously adapted at pH 4.0 for 1 h, S. dimorphus developed highest growth rate under extreme acidic condition, and the maximum biomass concentration and specific growth rate at pH 3.0 (3.638 +/- 0.074 g L-1 and 1.037 +/- 0.008 d(-1), respectively) were respectively 14.22 and 10.79 % higher than those of non-adapted cells. Moreover, acid-adapted cells could tolerate lower pH of 2.5, at which the growth of non-adapted cells was totally inhibited. All the results indicated that acid adaptation was an effective approach for the acid resistance enhancement of microalgae.
学科主题	能源藻类资源
WOS标题词	Science & Technology ; Life Sciences & Biomedicine
类目[WOS]	Biotechnology & Applied Microbiology ; Marine & Freshwater Biology
研究领域[WOS]	Biotechnology & Applied Microbiology ; Marine & Freshwater Biology
关键词[WOS]	TOLERANCE RESPONSE ; CARBON UPTAKE ; PH ; GROWTH ; MICROALGAE ; CO2 ; KR-1 ; SO2 ; NO
收录类别	SCI
语种	英语
WOS记录号	WOS:000310232900031
公开日期	2012-11-09
内容类型	期刊论文
源URL	[http://ir.qibebt.ac.cn:8080/handle/337004/1147]
专题	青岛生物能源与过程研究所_微藻生物技术团队
作者单位	Chinese Acad Sci, Qingdao Inst Bioenergy & Bioproc Technol, Shandong Key Lab Energy Genet, Qingdao 266101, Peoples R China
推荐引用方式 GB/T 7714	Jiang, Yinli,Peng, Xiaowei,Zhang, Wei,et al. Enhancement of acid resistance of Scenedesmus dimorphus by acid adaptation[J]. JOURNAL OF APPLIED PHYCOLOGY,2012,24(6):1637-1641.
APA	Jiang, Yinli,Peng, Xiaowei,Zhang, Wei,&Liu, Tianzhong.(2012).Enhancement of acid resistance of Scenedesmus dimorphus by acid adaptation.JOURNAL OF APPLIED PHYCOLOGY,24(6),1637-1641.
MLA	Jiang, Yinli,et al."Enhancement of acid resistance of Scenedesmus dimorphus by acid adaptation".JOURNAL OF APPLIED PHYCOLOGY 24.6(2012):1637-1641.