To obtain cadmium tolerant lactic acid bacteria from pickles and to analyze their adsorption capability, MRS medium with high concentration of cadmium were used for selection, and a strain named ZY-6 was obtained by further increasing cadmium concentration in the medium. The strain ZY-6 could tolerate 900 mg/L and 10 000 mg/L Cd2+ in liquid and solid medium, respectively. Its optimal growth condition was at pH 7 and 37℃ with 10 g/L NaCl. ZY-6 was identified as Weissella viridescens based on morphological observation, physiological and biochemical experiments and 16S rDNA sequencing. With an initial concentration of 50 mg/L Cd2+, the adsorption rate of Cd2+ by W. viridescens was 61.78%, while its adsorption capabilities for Pb2+, Cu2+, and Mn2+ were also confirmed. In conclusion, this study indicates that it is possible to apply lactic acid bacteria in treating heavy metal contaminated foods.
CHEN Yuling
,
CHEN Yinyuan
,
LIU Anqian
,
LI wen
,
LI Tongxiang
,
WANG Tao
. Screening and adsorption capability of cadmium tolerant lactic acid bacteria from pickles[J]. Food and Fermentation Industries, 2019
, 45(14)
: 27
-33
.
DOI: 10.13995/j.cnki.11-1802/ts.020480
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