Competition for factors and cellular resources as a principle of pattern formation in Hydra. I. Increase of the potentials for head and bud formation and rescue of the regeneration-deficient mutant reg-16 by treatment with diacylglycerol and arachidonic acid.

Abstract excerpt

The mutant strain reg-16 of Hydra magnipapillata has less capacity to regenerate a head than the wild-type strain 105 when examined in a standard test. The present comparative study with various strains of Hydra shows: (1) The head-forming potential of reg-16 and also of a widely used strain of Hydra vulgaris is severely impaired by the presence of a just-emerging or latent bud. (2) Periodic treatment with...

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