Abstract
An NMR method with a pulsed magnetic field gradient was applied to study changes in water permeability of the vacuolar symplast in maize (Zea mays L.) seedling roots treated with various inhibitors of cell metabolism. The results were qualitatively analogous to literature data on conductivity changes of intercellular gap junctions in animal cells exposed to similar treatments. Electron microscopy examination of root cells provided evidence for the existence of membrane contacts between the endoplasmic reticulum and the tonoplast. It is supposed that vacuoles of neighboring plant cells are interconnected through highly dynamical gap junctions between the tonoplast and the endoplasmic reticulum membrane.
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