[The sensitivity of the moor frog Rana arvalis Nilss. tadpoles to natural L-amino acids and its alteration in ontogeny].
The Rana arvalis tadpoles at 27-40 stages responded to solution of some L-amino acids in concentration 10(-2) mol/l with feeding reactions. The range of perceptible amino acids increased during development from 10 to 16. The best feeding stimuli were aspartic and glutamic acids; amino-acids (proline and oxyproline), methionine, leucine and isoleucine did not evoke the significant reactions. The sensitivity to some amino acids (alanine, glutamine, lysine, ornithine, proline and valine) was 10(-5)-10(-4) mol/l at earlier stages and increased to 10(-6)-10(-5) mol/l during larval ontogenesis.
Kiseleva
E I
EI
A. N. Severtsov Institute of Problems of Ecology and Evolution, Russian Academy of Science, Moscow, Russia.
D000596:Amino Acids / Q000494:pharmacology*; D000818:Animals; D002628:Chemoreceptor Cells / Q000187:drug effects / Q000502:physiology; D004305:Dose-Response Relationship, Drug; D007814:Larva / Q000187:drug effects / Q000254:growth & development; D011898:Ranidae / Q000254:growth & development / Q000502:physiology*; D012996:Solutions
D000596:Amino Acids; D012996:Solutions