Identification and Characterization of Lactobacillus Planetarium TH1

Lactobacillus plantarum (L. plantarum) is a flexible and versatile microorganism that inhabits a variety of environmental niches, and some strains are marketed as probiotics. In this study, a strainTH1 which was isolated from silage in our former works was classified asL. plantarum by 16S rDNA sequence analysis and phylogenetic tree. Then its potential abilities of bile tolerance, nitrate reduction and anti-hypertension were investigated. The results showed that L. plantarum TH1 had capacity to resistance to bile salt, directly deoxygenate nitrate to nitrogen or ammonia rather then nitrite, and produce ACE inhibitory components in fermented milk. These works indicated that this novel lactobacillus strain might be considered as candidates for probiotics strains using in the food or drug system to improve the health of patients suffering from hypertension or other chronic disease.