Abstract

Marioara Nicoleta Filimon*, Aurica Breica Borozan, Despina Maria Bordean, Roxana Popescu, Smaranda Rodica Gotia, Doina Verdes and Sinitean Adrian

Cambic chernozem soil samples were collected from experimental field of plant breeding discipline, the U.S.A.M.V.B. department in TimiÅ?oara. The soil has been sifted through a sieve of 2 mm and placed in polyethylene bags. Thereafter, the soil was treated with two herbicides (tribenuron-methyl and nicosulfuron) in different doses. Samples were incubated for 7 days in a thermostat at 28°C and subsequently, quantitative and qualitative analysis of fungal colonies in soil samples was performed. The following fungi species were identified in the batch samples: Fusarium sp., Chaetomium sp., Mucor sp., Humicola sp., Penicillium sp., Rhizopus sp. and Actinomucor sp. Certain species were found in soil samples treated with tribenuron-methyl and nicosulfuron, using increased doses. Other species had reduced-growth due to their sensitivity to xenobiotics. Still, other species appear in treated variants: Stachybotrys sp., Cladosporium sp., Aspergillus sp., Penicillium sp. and Fusarium sp. in every experimental variant presented an increasing resistance to the action of xenobiotic substances.