Title Effects of genotype and environmental factors on rape seed contamination with mycotoxins and mycotoxin-producing fungi
Translation of Title Genotipo ir aplinkos veiksnių įtaka rapsų sėklų užterštumui mikotoksinais bei juos gaminančiais grybais.
Another Title Genotipo ir aplinkos veiksnių įtaka rapsų sėklų užterštumui mikotoksinais bei juos produkuojančiais grybais.
Authors Brazauskienė, Irena ; Petraitienė, Eglė ; Mankevičienė, Audronė
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Is Part of Ekologija. 2006, Nr. 3, p. 14-20.. ISSN 0235-7224
Keywords [eng] Winter oilseed rape ; Seed contamination ; Mycotoxins
Abstract [eng] Studies on pathogenic infection level and the content of pathogen-produced toxins on the seed of different winter rape cultivars as affected by different factors were conducted at the Lithuanian Institute of Agriculture. Microbiological seed contamination of different winter rape cultivars ranged within 1.4– 2.6 cfu g-1×104. In the seed samples of all winter rape cultivars, the dominant fungi were those belonging to the genera Cladosporium, Alternaria, Penicillium and Fusarium. For the first time we investigated toxins produced by rape seed fungi and found the mycotoxin deoxynivalenol in separate cultivars to amount to 164–183 µg kg-1 seed. Aflatoxin content ranged from 1.0 µg kg-1 in the seed of cv. ‘Alaska’ to 3.1 µg kg-1 in the seed of cv. ‘Triangle’. Even greater variations between the cultivars were identified for ochratoxin A content in seed. Having determined the level of aflatoxin and ochratoxin A on the seed of various winter rape cultivars after an eight-month storage, a reduction trend was observed for both toxins tested. Experimental evidence suggests that the effect of anthropogenic factors on the surface and internal fungal contamination of seed of winter rape cultivars was not very pronounced, however, during the eight-month storage the seed surface fungal infection declined, and an especially marked reduction occurred in the level of infection with the fungi of the genera Alternaria and Botrytis.
Type Journal article
Language English
Publication date 2006