Abstract
Abstract In the present research, a strain of Lactobacillus plantarum TK9 was isolated from the Chinese naturally fermented congee and its characteristics for probiotic and food preservation were investigated. In terms of probiotic, the strain not only survives bile salts and simulated gastric juice but grows well under hypertonic conditions. Besides, the L. plantarum TK9 exhibited a broad antifungal spectrum, including most of the species closely related to food spoilage, like Penicillium roqueforti, Penicillium citrinum, Penicillium oxalicum, Aspergillus fumigatus, Aspergillus flavus and Rhizopus nigricans. But no evident inhibition effect was found on Aspergillus niger. To further evaluate its potential as bio-preservative, L. plantarum TK9 was inoculated into citrus, apples and yogurt prior to the addition of moulds. The results indicated that L. plantarum TK9 could obviously prolong shelf life of the test food for 72–96 h and represent an excellent candidate for food-related bio-preservative.
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