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A high frequency mutation starts sexual reproduction in volvox carteri


, : A high frequency mutation starts sexual reproduction in volvox carteri. Zeitschrift fuer Naturforschung Section C Journal of Biosciences 39(11-12): 1159-1162

Pheromone-initiated sexual reproduction of V. carteri f. nagariensis is started by a spontaneous generation of sexual male spheroids at a rate of 10-4. As previously suggested, these males are mutants (sexc) which become independent of pheromone-controlled sex-induction. Unequivocal evidence for a mutative event now comes from the observation that the sexc trait is transmitted through cell lineages during embryogenesis, thus confirming earlier morphological analysis. Mutation seems to be restricted to cell division. The high frequency of mutation points to a special enhancing mechanism for which the possibility of a genome rearrangement is discussed.

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