ABSENCE OF PLASMA MEMBRANE H+-ATPASE IN PLASMODESMATA LOCATED IN PIT-FIELDS OF THE YOUNG REACTIVE PULVINUS OF MIMOSA PUDICA L

摘要

Immunocytochemical techniques were employed to study the spatial distribution of the plasma membrane H+-ATPase within various cell types of the young reactive primary pulvinus of Mimosa pudica L. These cells were interconnected by large numbers of plasmodesmata, being concentrated within pit-fields. Although we could routinely detect evidence of the H+-ATPase along the plasma membrane, immunolabelling was rarely, if ever, observed along the plasma membranes of the plasmodesmata. This finding is discussed with respect to the likely specialized supramolecular structure of the plasmodesma. [References: 33]