Molekularna struktura i auksinska aktivnost 2-alkilindol-3-octenih kiselina

Snjezana Antolic, Eduard Dolusic, Biserka Kojic-Prodic, Erika Kozic, Volker Magnus

Résultats de recherche: Contribution à un événement scientifique (non publié)Poster

Résumé

In general, the auxin activity of indole-3-acetic acid decreases gradually when alkyl substituents of increasing chain length are attached to its ring-carbons. Only for the 2-position, Kögl and Kostermans (Hoppe Seyler's Z. physiol. Chem. 235, 201, 1935) claimed that any substituent larger than a methyl group rendered the molecule inactive. We showed, however, that the '2-ethylindole-3-acetic acid' they used in their experiments is, in reality, 3-methylindole-2-propionic acid. The proper 2-ethylindole-3-acetic acid and its 2-propyl homologue were prepared by a different route and characterized by NMR spectroscopy and X-ray crystallography. Both compounds showed auxin activity in the Avena coleoptile-section straight-growth test, with dose-response curves similar to those of 2-methylindole-3-acetic acid, i. e. not quite as high as for co-assayed indole-3-acetic acid and shifted by about one order of magnitude towards higher concentrations.
Titre traduit de la contributionMolecular structure and auxin activity of 2-alkyl-indole-3-acetic acids
langue originaleautre
PagesZbornik sazetaka priopcenja Sedmog hrvatskog bioloskog kongresa, Hvar, Hrvatska, 24.09-29.09.2000, pp. 91-91
Etat de la publicationPublié - 2000
EvénementSedmi hrvatski bioloski kongres - Hvar, Croatie
Durée: 24 sept. 200029 sept. 2000

Une conférence

Une conférenceSedmi hrvatski bioloski kongres
PaysCroatie
La villeHvar
période24/09/0029/09/00

mots-clés

  • 2-etilindol-3-octena kiselina
  • bioloska aktivnost
  • auksin
  • 2-propilindol-3-octena kiselina
  • 2-metilindol-3-octena kiselina
  • molekularna struktura

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