INHIBITION OF SOME ROT FUNGI POLYGALACTURONASES BY ALLIUM-CEPA L AND ALLIUM-PORRUM L EXTRACTS

Extracts of Allium cepa and A. porrum contain factors that inhibit to various extents polygalacturonases (PGs) produced in vitro by Sclerotinia sclerotiorum, Botrytis cinerea, Fusarium moniliforme, Phoma terrestris, Sclerotium cepivorum, Macrophomina phaseolina, Didymella bryoniae and Phoma lycopersici. The PG inhibition rank changed using leek or onion extract. The inhibition factors are possibly proteins, do not present particular specificity and act against PGs of fungi pathogens and non pathogens for these plant species