Improvement of the Fermentative Activity of Lactic Acid Bacteria Starter Culture by the Addition of Mn(2+)

Improvement of the Fermentative Activity of Lactic Acid Bacteria Starter Culture by the Addition of Mn(2+) Appl Biochem Biotechnol. 2014 Aug 22; Authors: Cheng X, Dong Y, Su P, Xiao X Abstract Production of lactic acid bacteria (LAB) starter with raw material has received much scientific investigation, but little information is available on the influences of some trace elements on the growth and fermentative activity of LAB. Based on this fact, this paper aimed to investigate the effects of Mn(2+) on the performance of Lactobacillus plantarum CX-15 starter with Jerusalem artichoke (JA) as the main medium substrate. The results showed that Mn(2+) addition had a significant beneficial affect on the fermentative activity of L. plantarum CX-15 starter. In contrast, the lack of Mn(2+) would cause the subsequent fermentation significantly slower, whether the cell density in starter culture was higher or lower. The possible mechanism of these phenomenons was further elucidated by the time course analysis of the specific activities of metabolism key enzymes during the culture processes of L. plantarum CX-15 starter. Compared to the fermentation processes without Mn(2+) addition, it was found that Mn(2+) addition would enhance the lactate dehydrogenase (LDH) activity but reduce the activities of pyruvate dehydrogenase (PDH) and ATPase activity. Therefore, it could be concluded that the improvement of L. plantarum starter fermentative activity...
Source: Applied Biochemistry and Biotechnology - Category: Biochemistry Authors: Tags: Appl Biochem Biotechnol Source Type: research