106(1)_str8

 

ISSN 1392-3196 / e-ISSN 2335-8947
Zemdirbyste-Agriculture, vol. 106, No. 1 (2019), p. 59–64
DOI  10.13080/z-a.2019.106.008

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

Rūta VAITKEVIČIENĖ, Daiva Žadeikė, Elena BARTKIENĖ, Vita KRUNGLEVIČIŪTĖ, Violeta BALIUKONIENE, Skaidrė SUPRONIENĖ, Gražina JUODEIKIENĖ

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.

Key words: antifungal activity, Aspergillus, lactobacilli, pediococci, Penicillium, rice bran.

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