Shaping of the fungal communities isolated from yellow lupin seeds (Lupinus luteus L.) throughout storage time
2005
Cwalina-Ambroziak, B. | Kurowski, T.P.,Uniwersytet Warminsko-Mazurski, Olsztyn (Poland). Katedra Fitopatologii i Entomologii
The object of the experiment were seeds of two traditional cultivars of yellow lupin (Juno and Amulet) cultivated in 1999 in two crop-rotation with 20 and 33 percent yellow lupine contribution. In total 1077 fungal colonies were isolated from the lupin seeds. Fungi representing the species of Penicillium - 29.3 percent, Alternaria alternata - 26.7 percent and Rhizopus nigricans - 12.7 percent were isolated most widely. Among the fungi pathogenic to lupin, the species of Colletotrichum gloeosporioides (16.3 percent isolates) was dominant. The crop rotation with 20 percent lupin reduced the number of fungal colonies colonizing the seeds including the pathogens from the species of C. gloeosporioides. Seed disinfection decreased the total number of fungal colonies isolated from both cultivars. Higher number of C. gloeosporioides isolates was found in the combination with disinfected seeds. More fungal colonies were obtained from seeds of cv. Amulet than from those of cv. Juno. The storage duration had an effect on the population and the composition of species of fungi isolated from seeds of yellow lupine. With longer storage population of Penicillium spp. and Rhizopus spp. increased, whereas the population of C. gloeosporioides decreased
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