in vivo and in vitro Effects of Some Phenolic Compounds and Tannins on Potato Virus Y

Four compounds namely catechin, gallic acid, gallotannins and ellagic acid were tested for their inhibitory effect on potato virus Y (PVY) in vitro and in tissue culture. Catechin and gallotannins showed inhibition (39.5 and 48.1 percent) of PVY infectivity in vitro. The other two showed less inhibition. In in vivo studies, gallic acid and gallotannins showed more inhibition (67.5 and 66.7 percent) of virus multiplication in callus tissue growing in medium containing these two compounds. The other showed less inhibition.