EFFECT OF A FUNGAL EXTRACT HOMOGENATE FROM BOTRYTIS-CINEREA ON TISSUE-CULTURES OF PAPAVER-SOMNIFERUM L - CHANGES IN THE ELECTRICAL MEMBRANE-POTENTIAL

A fungal extract prepared from Botrytis cinerea L. was tested towards its possible effect on the membrane potential of poppy callus cells. A lthough comparable low the membrane potential of poppy callus cells ha s been shown to consist of two components (an active, and a passive on e). In general the presence of the fungal extract caused significant d epolarization of the membrane potential monitored by internal microele ctrodes. It has been further shown that the fungal extract not only af fects the active component of the membrane potential but also the pass ive one especially if applied in higher concentrations. However, with these results alone it is not possible to relate unambiguously the mem brane potential changes to an effect of elicitation.