PATHOGENE AND SAPROFITIC FUNGUS PRESENT IN THE WHEAT KERNELS SPERMOSPHERE, AS POTENTIAL PRODUCER OF MYCOTOXICOSIS ON MAN AND DOMESTIC ANIMALS PUBLISHEDA. BORCEAN, Gh. DAVID
Storing wheat seed is one of the most important technological phases, both for agriculture andanimal husbandry and food industry. From Phytopathology point of view, many of fungi and bacteriafound on seeds when they are placed in silos but mostly in farmers family granary, storage under theoptimal technical level of control and ventilation could have as result a temperature and humidityincrease in seed mass. This may lead to compromise of that stored seeds amount. On the other hand itshould be noted that the microorganisms whichcan cause potential problems are placed in storagewarehouses together with seeds because those seeds containon the seminal skin or seeds inside thosephytopathogenic agents.Infections in this case have as point of origin directly from the field pathogensdissemination, or from indirect infections produced by transport or even handling the mass of seedsbefore storing. Wheat biggest trouble can be caused by fungi of the genera Aspergillus,Penicillium,Fusarium, and also Ustilago tritici or Tilletia sp. Even in small amounts some of these fungispores when are placed in the good conditions of temperature and humidity forinfection, will lead to thedevelopment of "molds" that emit dangerous mycotoxins such as aflatoxins, tenuazonic acid and othermetabolites dangerous. Or if the seeds are used to make concenrtateforage for animal husbadry and thisforage are kept in poor conditions, toxicosiscaused by this fungi toxins are unavoidable and evenproducts made from these animals are also toxic. In present paper we propose to show results of ourresearch concerning the amount of potentially toxigenic fungi species in seed parties harvested in2012,from several wheat varieties. Working method we used to determine the spores of these pathogenswas extended Wageningen method with method of E.Rădulecu and A. Negru. Results clearly indicates thepresence on the seeds coat of fungal spores from genera Aspergillus, Fusarium and Alternariatogether fwith Ustilago tritici which can cause trouble when using these seed farmers .
wheat seeds, storage grains, pathogen spores