Modulation of cadmium bioaccumulation and enhancing cadmium tolerance in Pichia kudriavzevii by sodium chloride preincubation
文献类型： 外文期刊
作者： Ma, Ning 1 ; Li, Chunsheng 1 ; Zhang, Dandan 1 ; Yu, Jinzhi 1 ; 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, Guangdong, Peoples R China
关键词： Pichia kudriavzevii; Saccharomyces cerevisiae; NaCl preincubation; Cadmium bioaccumulation; Cellular response
期刊名称：JOURNAL OF BASIC MICROBIOLOGY （ 影响因子：2.281； 五年影响因子：2.516 ）
ISSN： 0233-111X
年卷期： 2016 年 56 卷 7 期
页码：
收录情况： SCI
摘要： Application of growing microorganisms for cadmium removal is limited by the sensitivity of living cells to cadmium. The effects of sodium chloride (NaCl) preincubation on the cadmium bioaccumulation and tolerance of Pichia kudriavzevii and Saccharomyces cerevisiae were investigated in this study. NaCl preincubation significantly reduced the intracellular and cell-surface cadmium bioaccumulation of P. kudriavzevii at both 6 and 20mgL(-1) cadmium, while no obvious effect was observed in S. cerevisiae except that the intracellular cadmium bioaccumulation at 20mgL(-1) cadmium was reduced obviously by 20-60gL(-1)NaCl. For both yeasts, the improved contents of protein and proline after NaCl preincubation contributed to the cadmium tolerance. The thiol contents in P. kudriavzevii under cadmium stress were alleviated by NaCl preincubation, which might be due to the decrease of intracellular cadmium bioaccumulation. NaCl preincubation enhanced the contents of glycerol and trehalose in P. kudriavzevii under cadmium stress, while no acceleration was observed in S. cerevisiae. The results suggested that NaCl preincubation could be applied in cadmium removal by growing P. kudriavzevii to increase the cadmium tolerance of the yeast.
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