title: Different effects of sodium chloride preincubation on cadmium tolerance of Pichia kudriavzevii and Saccharomyces cerevisiae.
abstract: Application of growing microorganisms for cadmium removal is restricted by high cadmium toxicity. The effects of sodium chloride (NaCl) preincubation on the cadmium tolerance and removal ability of Pichia kudriavzevii and Saccharomyces cerevisiae were investigated in this study. NaCl preincubation improved the biomass of P. kudriavzevii under cadmium stress, while no obvious effect was observed in S. cerevisiae. The improved activities of peroxidase (POD) and catalase (CAT) after NaCl preincubation might be an important reason for the decrease of the reactive oxygen species (ROS) accumulation, cell death, and oxidative damage of proteins and lipids induced by cadmium, contributing to the improvement of the yeast growth. The cadmium bioaccumulation capacity of P. kudriavzevii decreased significantly after NaCl preincubation, which played an important role in mitigating the cadmium toxicity to the yeast. The cadmium removal rate of P. kudriavzevii was obviously higher than S. cerevisiae and was significantly enhanced after NaCl preincubation. The results suggested that NaCl preincubation improved the cadmium tolerance and removal ability of P. kudriavzevii.
authors.affiliation: Laboratory of Food Chemistry and Nutrition, College of Food Science and Engineering, Ocean University of China, Qingdao, China.
authors.forename: Ning
authors.initials: N
authors.lastname: Ma
authors.affiliation: Laboratory of Food Chemistry and Nutrition, College of Food Science and Engineering, Ocean University of China, Qingdao, China.
authors.forename: Chunsheng
authors.initials: C
authors.lastname: Li
authors.affiliation: Laboratory of Food Chemistry and Nutrition, College of Food Science and Engineering, Ocean University of China, Qingdao, China.
authors.forename: Xiaoyan
authors.initials: X
authors.lastname: Dong
authors.affiliation: Laboratory of Food Chemistry and Nutrition, College of Food Science and Engineering, Ocean University of China, Qingdao, China.
authors.forename: Dongfeng
authors.initials: D
authors.lastname: Wang
authors.affiliation: Laboratory of Food Chemistry and Nutrition, College of Food Science and Engineering, Ocean University of China, Qingdao, China.
authors.forename: Ying
authors.initials: Y
authors.lastname: Xu
mesh_terms: D002104:Cadmium / Q000378:metabolism* / Q000633:toxicity*; D002374:Catalase / Q000378:metabolism; D018384:Oxidative Stress; D009195:Peroxidase / Q000378:metabolism; D010843:Pichia / Q000187:drug effects / Q000254:growth & development / Q000378:metabolism*; D017382:Reactive Oxygen Species / Q000378:metabolism; D012441:Saccharomyces cerevisiae / Q000187:drug effects* / Q000254:growth & development / Q000378:metabolism*; D012965:Sodium Chloride / Q000378:metabolism* / Q000494:pharmacology*
chemical_list: D017382:Reactive Oxygen Species; D002104:Cadmium; D012965:Sodium Chloride; D002374:Catalase; D009195:Peroxidase
keywords: Cadmium bioaccumulation; NaCl preincubation; Oxidative stress; Pichia kudriavzevii; Saccharomyces cerevisiae