Annals of Botany 52: 905-913, 1983
© 1983 Annals of Botany Company
RESEARCH-ARTICLE |
Polarity of Acetabularia mediterranea: Stability in the Anucleate State
Institut für Entwicklungsphysiologie, Universität K
ln Gyrhofstrasse 17, 5 K
ln 41, FRG
Accepted: 11 May 1983
Concomitant with the outgrowth of the cap in cells of Acetabularia mediterranea Lamouroux, the stalk acquires a pale green appearance (Aufhellung) and the chlorophyll and protein content decreases due to the translocation of part of the cytoplasm from the stalk into the cap. This process also occurs in anucleate cells or apical fragments during cap formation and in inverse grafts constructed either from two anucleate cells or apical fragments or from two basal fragments containing the rhizoids. The cytoplasm's translocation does not depend on the presence of the nucleus. It is suggested that the unidirectional flow of the cytoplasm during cap formation is generated by the electrical charge across the cell and that this electrical charge is maintained after removal of the nucleus.
Acetabularia, polarity, anucleate cells, grafts