Abstract

The endoplasmic reticulum (ER) can be observed in living plant cells by fluorescence and video microscopy. Both its distribution and its dynamic properties seem largely to depend on actin and myosin. Actin filaments (AFs) provide a framework for the spacing of the cortical, lace-like ER elements and of the ER strands. Moreover, AFs are held responsible for the extension of ER tubules and lamellae as well as for their motility. Synchronized movements of ER and other organelles of plant cells seem to depend on co-localizations of ER and AFs. We summarize the growing body of evidence that the motility of plant ER is based preferentially on the actin cytoskeleton.

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