The question of the equality of somatic and germ nuclei in respect to heredity and survival on the basis of studies in a soil protozoon

Horváth, János (1947) The question of the equality of somatic and germ nuclei in respect to heredity and survival on the basis of studies in a soil protozoon. A Magyar Tudományos Akadémia Tihanyi Biológiai Kutatóintézetének évkönyve, 17. pp. 193-202. ISSN 0365-3005

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Abstract

1. From the Kahlia simplex Horváth soil protozoön the micronucleus was eliminated1 by u. v. radiation. 2. From the amicronucleate Kahlia were established: a) The vegetative life-function capacities — digestion, selection, excretion, regeneration, division, encysting and excysting. b) That the life-span under optimum conditions was interminable. c) That the animals are capable of endomixis (parthenogenesis) and of conjugation. 3. In the amicronucleate Kahlia during parthenogenesis the macronucleus at first breaks up but under optimum conditions regenerates anew. 4. If during the conjugation of amicronucleate Kahlia the macronucleus breaks up and is absorbed 'to such an extent that only micronucleus- sized pieces are left, it can still reorganize from these. 5. Under points 2, 3 and 4 we can declare that the macronucleus is equal in value to the germ nucleus. 6. The genes of heredity are probably present at the inception of the macronucleus.

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