MODE OF DIVISION AND FATE OF THE FLAGELLAR BASAL APPARATUS DURING THEFIRST-ROUND OF CELL-DIVISION OF POLYTOMA-PAPILLATUM/

Computer-aided 3D-reconstruction of ultrathin serial sections through cells of Polytoma papillatum at different stages of the ist round of d ivision revealed a semitransverse (sensu ETTL 1988) bisection of the p arental cell. The developmental cycle of the flagellar/basal apparatus recently proposed by WOLF (1992) was also supplemented. It was shown (i) that the parental flagella may remain attached to the dividing pro toplast down to the end of its multiple fission, and (ii) that a prema ture and limited outgrowth of short flagella was absent during the ist mitosis.