The use of rice polish medium for the evaluation of antifungal activity of lactic acid bacteria

Abstract

The aim of this study was to evaluate rice polish as a substrate for the production of metabolites characterised by antifungal activity by using lactic acid bacteria. The Lactobacillus plantarum, L. brevis, L. paracasei, L. uvarum, L. farraginis, Pediococcus pentosaceus and P. acidilactici strains were tested in the experiment. The antifungal activity of the strains was evaluated against filamentous fungi, such as Aspergillus versicolor, A. terreus, A. niger, A. fumigatus and Penicillium spinulosum, P. viridicatum, P. palitans. The rice polish fermentation was carried out in a single step without growth supplementation at submerged fermentation conditions. The obtained results confirmed that rice polish is a suitable substrate for the production of antifungal metabolites depending on lactic acid bacteria (LAB) strain. The tested P. pentosaceus strains showed strong and moderate inhibitory activity against P. viridicatum, A. versicolor fungi, while P. acidilactici strains showed moderate and low activity against Aspergillus sp. fungi. None of the tested LAB exhibited antifungal activity against A. terreus and A. niger.

synergistic effect of secondary metabolites of locale isolates of lactic acid bacteria with some plant extract against Aspergillus Niger

“…From the foregoing, it is clear that the results obtained for Pediococcus sp. are consistent with what was reached by Vaitkevičienė (Vaitkevičienė et al 2019),where he proved that Pediococcus acidolactici did not show any activity against Aspergillus niger and A.terreus, while it showed medium and low effectiveness against A.verciolor and A.fumigatus ,as well as a low and medium effect against Pancillium sp.. Also the results of our study are parallel to what Yanina obtained at (Yanina et al 2018), where he abled to isolate phanyllactic acid from Pediococcus acidolactici and tested it on many fungi that grew on bread, including Aspergillus niger ,A.japonicus ,Pancillium sp. And some yeast like S. cervisiae.…”

Xanthomonas campestris biocontrol agent: Selection, medium formulation and bioprocess kinetic analysis

“…Lactobacillus spp. have been considered as biocontrol agents due to production of different antimicrobial compounds, such as bacteriocins, organic acids, antimicrobial peptides and hydrogen peroxide [18]. Due to 5 GRAS (Generally Regarded As Safe) status they usually comply with all recommendations for food and agricultural products.…”