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Efficient removal of zinc by multi-stress-tolerant yeast Pichia kudriavzevii A16

文献类型: 外文期刊

作者: Li, Chunsheng 1 ; Yu, Jinzhi 1 ; Wang, Dongfeng 1 ; Li, Laihao 2 ; Yang, Xianqing 2 ; Ma, Haixia 3 ; Xu, Ying 1 ;

作者机构: 1.Ocean Univ China, Coll Food Sci & Engn, Lab Food Chem & Nutr, Qingdao 266003, Peoples R China

2.Chinese Acad Fishery Sci, South China Sea Fisheries Res Inst, Natl R&d Ctr Aquat Prod Proc, Key Lab Aquat Prod Proc,Minist Agr, Guangzhou 510300, Guangdong, Peoples R China

3.Chinese Acad Fishery Sci, South China Sea Fisheries Res Inst, Natl R&d Ctr Aquat Prod Proc, Key Lab Aquat Prod Proc,Minist

关键词: Pichia kudriavzevii;Saccharomyces cerevisiae;Zinc bioaccumulation;High salinity;Low pH

期刊名称:BIORESOURCE TECHNOLOGY ( 影响因子:9.642; 五年影响因子:9.237 )

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收录情况: SCI

摘要: Heavy metal bioaccumulation by growing microorganisms is a potential technique for treating the heavy metal pollution in food materials, e.g. fishery processing wastes. In this study, a multi-stress-tolerant yeast with high Zn tolerance and efficient Zn removal ability was screened and renamed as Pichia kudriavzevii A16 after identification. High salinity and low pH obviously increased the Zn bioaccumulation capacity of P. kudriavzevii A16, contributing to the increasing Zn removal rate of P. kudriavzevii A16 at 0.5 mmol/L Zn from 67.69% to 77.03% and 96.09%, respectively. P. kudriavzevii A16 displayed high specificity of Zn removal at high concentrations of Cu, while high concentrations of Cd significantly inhibited the Zn removal by restraining the yeast growth. P. kudriavzevii A16 possessed more powerful Zn removal ability than Saccharomyces cerevisiae CICC1211 under various environmental stresses. The multi-stress-tolerant P. kudriavzevii A16 can be developed into a potential Zn removal agent using in complex food environments. (C) 2016 Elsevier Ltd. All rights reserved.

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