College of Food Science, Sichuan Agricultural University, Ya'an, Sichuan 625014, People's Republic of China.
College of Food Science, Sichuan Agricultural University, Ya'an, Sichuan 625014, People's Republic of China; Institute of Food Processing and Safety, Sichuan Agricultural University, Ya'an, Sichuan 625014, People's Republic of China.
Food Chem. 2021 Jun 15;347:129000. doi: 10.1016/j.foodchem.2021.129000. Epub 2021 Jan 8.
In this study, the cypermethrin binding characteristics of lactic acid bacteria were investigated for the first time. Two strains, Lactobacillus plantarum RS60 and Pediococcus acidilactici D15, possessed the highest cypermethrin removal capacity and good tolerance to simulated digestive juices. They were employed for further studies on cypermethrin binding characteristics. 55.06% and 56.46% of cypermethrin were removed within 0.25 h by strains RS60 and D15, respectively. The effect of pH on binding capacity was negligible. Heat treatment enhanced cypermethrin binding rate. Moreover, inactive cells were capable of removing cypermethrin from fruit and vegetable juices, with over 60% cypermethrin reduction within 2 h. No adverse effect was found on the quality of juice during the biosorption process. Besides, these two strains also could bind other several pyrethroids and 3-phenoxybenzoic acid. These findings indicated that L. plantarum RS60 and P. acidilactici D15 may be useful to reduce cypermethrin in contaminated foods.
本研究首次考察了乳酸菌对拟除虫菊酯的结合特性。两株菌，植物乳杆菌 RS60 和嗜酸乳杆菌 D15，具有最高的拟除虫菊酯去除能力和良好的模拟消化液耐受性。它们被用于进一步研究拟除虫菊酯的结合特性。RS60 和 D15 菌株在 0.25 小时内分别去除了 55.06%和 56.46%的拟除虫菊酯。pH 值对结合能力的影响可以忽略不计。热处理增强了拟除虫菊酯的结合速率。此外，失活细胞能够从水果和蔬菜汁中去除拟除虫菊酯，在 2 小时内可减少超过 60%的拟除虫菊酯。在生物吸附过程中，对果汁的质量没有发现不良影响。此外，这两株菌还可以结合其他几种拟除虫菊酯和 3-苯氧基苯甲酸。这些发现表明，植物乳杆菌 RS60 和嗜酸乳杆菌 D15 可能有助于减少受污染食物中的拟除虫菊酯。
