Correlation between some qualitative features of soybean and occurrence of fungi
Journal Title: Rośliny Oleiste - Oilseed Crops - Year 2013, Vol 34, Issue 1
Abstract
No work has been found in which correlation between chosen qualitative features of soybean seeds and the settlement of the fungi colonies were investigated. The study was designed to evaluate selected qualitative characteristics of soybean, to determine the quantitative analysis of fungi including different media and temperature incubation and to specify correlation between qualitative characteristics of soybean and the number of colonies of fungi that inhabit them. Investigated material of soya comprised 15 samples of seeds. The characteristics of seeds included calculation of thousand seed weights, volumetric weight, amount of mineral and organic impurities (including the seeds of other species and undeveloped and damaged seeds), pH of seeds, seeds moisture content, seeds water activity (aw), seed fat content, fat acidity and critical moisture of seeds. Fungi contaminated soybean was investigated using different culture media (RBA, YpSs, DG18 Agar) and incubation temperatures (25[sup]o[/sup]C, 37[sup]o[/sup]C and 45[sup]o[/sup]C). The number of fungi was diversified depending on the type of culture medium and incubation temperature. The largest number of fungi colonies was isolated when DG18 medium was used at 25[sup]o[/sup]C. Significant differences between thousand seed weights and amount of fungi on YpSs at 45[sup]o[/sup]C have been revealed. The positive correlation was observed between the fat acidity and the number of mesophilic and xerophilic fungi at 25oC on RBA and DG18 media. The positive correlation was also observed between humidity of seeds and the number of xerophilic fungi on DG18 at 25[sup]o[/sup]C. The negative correlation between water activity of seeds and the number of colonies of mesophilic fungi on YpSs at 37[sup]o[/sup]C has been demonstrated. Relevant statistical correlations between physicochemical properties of soybean and the number of isolated fungi have been shown. Increased fat acidity may indicate fungal contamination of soybean.
Authors and Affiliations
Katarzyna Janda, Krzysztof Ulfig, Grzegorz Hury, Agata Markowska-Szczupak
Keywords
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- EP ID EP59745
- DOI 10.5604/12338273.1083531
- Views 112
- Downloads 0
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