ISSN:
1615-6102
Keywords:
Filaments-rotation
;
Microtubules
;
Microfilaments
;
Cell wall microfibrils
;
Cytomorphogenesis
;
Patterning
;
Preprophase
;
Septum
;
Micrasterias
Source:
Springer Online Journal Archives 1860-2000
Topics:
Biology
Notes:
Summary Rotating filaments produce far reaching lateral streams in a thick medium and localized negative pressure when placed adjacent a wall. Freely movable filaments can roll on a wall. Pairs of counterrotating filaments are stabilized. When rotating components of the cytoskeleton generate these lateral hydrodynamic effects many hitherto mysterious features can be explained, including positioning of organelles and morphogenesis of plant cells. It is postulated that MTs and MFs roll laterally to positions of equilibrium, these being, for example, the preprophase band site and the cortical site that controls local thickening of the secondary wall. The orientation of microfibrils in the cell wall may also depend on the lateral effects of rotation. Different streaming patterns can move and shape the nucleus and other organelles and bring them in appropriate positions. Morphogenetic events as septum and lobe formation in desmids could result. Time-dependent reversal of the rotational directions are required for the transformation of the patterns.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF01322637
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