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Journal of Experimental Biology 69,45-51 (1977)
Published by Company of Biologists 1977

Relationship of Intracellular Potassium to Asexual Reproduction in Hydra

LEONARD G. EPP 1 and DANIEL C. KOBLICK 2

1 Department of Biology, Mount Union College, Alliance, Ohio 44601
2 Department of Biology, Illinois Institute of Technology, Chicago, Illinois 60616

Author for correspondence

Removal of potassium from Hydra culture medium produces a decrease in intracellular potassium and a parallel decrease in asexual growth rate. Rubidium and caesium are ineffective as substitutes for potassium in the maintenance of growth rate. Increases in intracellular potassium parallel increases in growth rate up to a level somewhat below the normal steady-state level of intracellular potassium. The full potassium requirement for maximum effect on budding can be acquired from food or external medium. High levels of external potassium suppress budding but do not alter intracellular potassium levels.

Submitted on October 21, 1976






© The Company of Biologists Ltd 1977