44. Ott, D. W. and R. M. Brown, Jr. 1974.
Developmental cytology of the genus Vaucheria. I. Organization
of the vegetative filament. British Phycol J. 9:111-126.
44. Abstract
The developmental cytology of the vegetative
filament of Vaucheria has been investigated with light
and electron microscopes. The vegetative filament consists of
three distinct zones: the apical zone, the sub-apical zone and
the zone of vacuolation. Organelle distribution and associations
in these zones have a primary role in controlling morphogenetic
events which influence growth and induce differentiation of sexual
and asexual organs. Cell elongation in the polarised vegetative
filament occurs by vesicular addition in the apical zone. Two
types of active cyclosis are found exclusively in the zone of
vacuolation. Nuclear cyclosis involves microtubular bands which
associate with persistent centrioles found adjacent to the outer
nuclear membrane. A specialised mitochondrial-dictyosome association
is transported by a microfilament-like system of anastomosing
strands. This latter system is extremely labile to conventional
fixatives.