Molecular structure and auxin activity of 2-alkylindol-3-acetic acids (CROSBI ID 473095)
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Podaci o odgovornosti
Antolić, Snježana ; Dolušić, Eduard ; Kojić-Prodić, Biserka ; Kožić, Erika ; Magnus, Volker
engleski
Molecular structure and auxin activity of 2-alkylindol-3-acetic acids
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.
molecular structure; biological activity; auxin; 2-methylindole-3-acetic acid; 2-ethylindole-3-acetic acid; 2-propylindole-3-acetic acid
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Podaci o prilogu
91-91-x.
2000.
objavljeno
Podaci o matičnoj publikaciji
Zbornik sažetaka priopćenja Sedmog hrvatskog biološkog kongresa
Ljubešić, Nikola
Zagreb: Hrvatsko biološko društvo
Podaci o skupu
Sedmi Hrvatski biološki kongres
predavanje
24.09.2000-29.09.2000
Hvar, Hrvatska