TY - CONF
T1 - Molekularna struktura i auksinska aktivnost 2-alkilindol-3-octenih kiselina
AU - Antolic, Snjezana
AU - Dolusic, Eduard
AU - Kojic-Prodic, Biserka
AU - Kozic, Erika
AU - Magnus, Volker
N1 - Zbornik sazetaka priopcenja Sedmog hrvatskog bioloskog kongresa, Hvar, Hrvatska, 24.09-29.09.2000, pp. 91-91
PY - 2000
Y1 - 2000
N2 - 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.
AB - 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.
KW - 2-etilindol-3-octena kiselina
KW - bioloska aktivnost
KW - auksin
KW - 2-propilindol-3-octena kiselina
KW - 2-metilindol-3-octena kiselina
KW - molekularna struktura
M3 - Poster
SP - Zbornik sazetaka priopcenja Sedmog hrvatskog bioloskog kongresa, Hvar, Hrvatska, 24.09-29.09.2000, pp. 91-91
T2 - Sedmi hrvatski bioloski kongres
Y2 - 24 September 2000 through 29 September 2000
ER -