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

Translated title of the contribution: Molecular structure and auxin activity of 2-alkyl-indole-3-acetic acids

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

Research output: Contribution to conferencePoster

Abstract

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.
Translated title of the contributionMolecular structure and auxin activity of 2-alkyl-indole-3-acetic acids
Original languageOther
PagesZbornik sazetaka priopcenja Sedmog hrvatskog bioloskog kongresa, Hvar, Hrvatska, 24.09-29.09.2000, pp. 91-91
Publication statusPublished - 2000
EventSedmi hrvatski bioloski kongres - Hvar, Croatia
Duration: 24 Sept 200029 Sept 2000

Conference

ConferenceSedmi hrvatski bioloski kongres
Country/TerritoryCroatia
CityHvar
Period24/09/0029/09/00

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  • Auxin activity and molecular structure of 2-alkylindole-3-acetic acids

    Antolic, S., Dolusic, E., Kozic, E. K., Kojic-Prodic, B., Magnus, V., Ramek, M. & Tomic, S., 2003, In: Plant Growth Regulation. 39, 3, p. 235-252 18 p.

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  • Molecular recognition of auxins - a rational approach to plant growth regulation

    Antolic, S., Dolusic, E., Bertosa, B., Kojic-Prodic, B., Magnus, V., Salopek-Sondi, B. & Tomic, S., 2002, Book of Abstracts, First Croatian Congress on Molecular Life Sciences, Opatija, Croatia, 09-13.06.2002. p. 84-84 1 p.

    Research output: Contribution in Book/Catalog/Report/Conference proceedingConference contribution

  • Molecular recognition of the plant hormone auxin is still a puzzle

    Kojic-Prodic, B., Magnus, V., Tomic, S., Antolic, S., Salopek-Sondi, B., Dolusic, E. & Bertosa, B., 2002, Abstracts, XIX Congress and General Assembly of the International Union of Crystallography, Geneva, Switzerland, 06.-15.08.2002. Vol. A58. p. C139-C139 1 p. (Acta Crystallographica; vol. A58).

    Research output: Contribution in Book/Catalog/Report/Conference proceedingConference contribution

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