title: Calcium Supplementation Abates the Inhibition Effects of Acetic Acid on Saccharomyces cerevisiae.
abstract: The toxic level of acetic acid could be released during the pretreatment of lignocellulosic biomass, and an economical method was reported to minimize the acidic stress on the fermentation of Saccharomyces cerevisiae by cation supplementation. A dose-dependent protection of Ca2+was monitored, and the optimal concentration of Ca2+was 8 mM under 4.5 g/L acetic acid stress. The activities of catalase and superoxide dismutase of yeast cells supplemented with optimal Ca2+increased by 18.6 and 27.3 %, respectively, coupling with an obvious decrease of reactive oxygen species content. Cell viability also performed a significant increase from 52.4 % (without Ca2+addition) to 73.56 % (with 8 mM Ca2+addition). No significant improvements were found in the bioethanol yields by Ca2+supplementation; however, the fermentation time was shortened by about 8 h obviously. Our results illustrated that the Ca2+supplementation could be an economical method to make the bioethanol production more efficient and cost-effective.
authors.affiliation: CAS Key Laboratory of Bio-Based Materials, Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, Qingdao, SP, People's Republic of China.
authors.forename: Hongwei
authors.initials: H
authors.lastname: Zhao
authors.affiliation: College of Food Science and Engineering, Qingdao Agricultural University, Qingdao, SP, People's Republic of China.
authors.forename: Jingyuan
authors.initials: J
authors.lastname: Li
authors.affiliation: CAS Key Laboratory of Bio-Based Materials, Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, Qingdao, SP, People's Republic of China.
authors.forename: Jiming
authors.initials: J
authors.lastname: Wang
authors.affiliation: CAS Key Laboratory of Bio-Based Materials, Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, Qingdao, SP, People's Republic of China.
authors.forename: Xin
authors.initials: X
authors.lastname: Xu
authors.affiliation: CAS Key Laboratory of Bio-Based Materials, Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, Qingdao, SP, People's Republic of China.
authors.forename: Mo
authors.initials: M
authors.lastname: Xian
authors.affiliation: CAS Key Laboratory of Bio-Based Materials, Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, Qingdao, SP, People's Republic of China.
authors.forename: Huizhou
authors.initials: H
authors.lastname: Liu
authors.affiliation: CAS Key Laboratory of Bio-Based Materials, Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, Qingdao, SP, People's Republic of China. zhanghb@qibebt.ac.cn.
authors.forename: Haibo
authors.initials: H
authors.lastname: Zhang
mesh_terms: D019342:Acetic Acid / Q000494:pharmacology*; D002118:Calcium / Q000494:pharmacology*; D002374:Catalase / Q000378:metabolism; D004305:Dose-Response Relationship, Drug; D005285:Fermentation / Q000187:drug effects; D012441:Saccharomyces cerevisiae / Q000166:cytology / Q000187:drug effects* / Q000378:metabolism / Q000502:physiology*; D013312:Stress, Physiological / Q000187:drug effects; D013482:Superoxide Dismutase / Q000378:metabolism; D013997:Time Factors; D015032:Zinc / Q000494:pharmacology
chemical_list: D002374:Catalase; D013482:Superoxide Dismutase; D015032:Zinc; D019342:Acetic Acid; D002118:Calcium
keywords: Acetic acid; Bioethanol; Inhibitor; Lignocellulosic biomass; Saccharomyces cerevisiae