Observations préliminaires sur l'organisation du cytosquelette des cellules végétales. Mise en évidence d'un “réseau microtrabéculaire”

Abstract

Electron microscopic observations of particularly favourable sections of pericycle and vascular parenchyma cells fixed with glutaraldéhyde have revealed the existence of a network of exceedingly fine filaments in the cytoplasmic ground substance of plant cells. This highly intricated structure to which polysomes seem to be attached interconnects the cytoskeletal fibers and the various other cellular components. It corresponds evidently to the "microtrabecular lattice" described in animal cells. Moreover, this report points out that microfilaments, which are 6- to 8-nm putative actin filaments, contract with microtubules or sheets of agranular reticulum, to form privileged close relationships whose functional significance is discussed.