Cytoskeleton orientation in epidermis cells of roots generated de novo in leaf explants under clinorotation

Abstract

The anatomy, cytoskeleton orientation, and thickness of the cell wall of the root growth zones generated de novo in vitro under clinorotation (simulated microgravity) were studied. The anatomical structure of the roots generated de novo from the cambium cells of the leaf explant petiole is similar to the structure of embryonic roots. The root cell differentiation in vitro during the clinorotation does not differ from the control in main features. Changes in the tubulin cytoskeleton orientation under clinorotation were detected in the epidermis of distal elongation zone (that is apparently associated with specific physiological properties of the cells in this zone). A tendency towards the thinning of the root cell walls in vitro under conditions of simulated microgravity was established.