Naslov
Molekularna struktura i auksinska aktivnost 2-alkilindol-3-octenih kiselina
(Molecular structure and auxin activity of 2-alkylindol-3-acetic acids)

Autori
Antolić, Snježana ; Dolušić, Eduard ; Kojić-Prodić, Biserka ; Kožić, Erika ; Magnus, Volker

Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, sažetak, znanstveni

Izvornik
Zbornik sažetaka priopćenja Sedmog hrvatskog biološkog kongresa / Ljubešić, Nikola - Zagreb : Hrvatsko biološko društvo, 2000, 91-91

Skup
Sedmi hrvatski biološki kongres

Mjesto i datum
Hvar, Hrvatska, 24.09.2000. - 29.09.2000

Vrsta sudjelovanja
Predavanje

Vrsta recenzije
Nije recenziran

Ključne riječi
molekularna struktura; biološka aktivnost; auksin; 2-metilindol-3-octena kiselina; 2-etilindol-3-octena kiselina; 2-propilindol-3-octena kiselina
(molecular structure; biological activity; auxin; 2-methylindole-3-acetic acid; 2-ethylindole-3-acetic acid; 2-propylindole-3-acetic acid)

Sažetak
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.

Izvorni jezik
Engleski

Znanstvena područja
Kemija

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