45. Ott, D. W. and R. M. Brown, Jr. 1974.
Developmental cytology of the genus Vaucheria. II. Sporogenesis
in V. fontinalis. British Phycol J. 9:333-351.
45. Abstract
Vegetative filament apices of Vaucheria
which differentiate into zoospores under altered culture
conditions have been examined in sections prepared for light and
electron microscopy. Soon after the migration and accumulation
of cytoplasmic organelles into the filament tip, the centriole
pair associated with each nucleus begins to form internal flagella.
The flagella and their nuclei converge into many internal flagellar
pools which then migrate to the surface of the zoospore and become
part of the plasma membrane. These events in filament apex take
place during the septation of the vegetative filament. At the
time of zoospore release, all nuclei are positioned just beneath
the zoospore surface and are intimately associated with pairs
of external flagella.