Naslov
Auxin activity of ring-alkylated derivatives of indole-3-acetic acid

Autori
Salopek, Branka ; Dolušić, Eduard ; Magnus, Volker

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

Izvornik
Zbornik sažetaka priopćenja Šestog kongresa biologa Hrvatske = Proceedings of abstracts of the papers of the Sixth Congress of Croatian Biologists / Huber, Đuro - Zagreb : Hrvatsko biološko društvo, 1997, 169-169

Skup
Šesti kongres biologa Hrvatske

Mjesto i datum
Opatija, Hrvatska, 22.09.1997. - 26.09.1997

Vrsta sudjelovanja
Pozvano predavanje

Vrsta recenzije
Nije recenziran

Ključne riječi
auxin activity; indole-3-acetic acid; IAA; ring-alkylated IAA

Sažetak
The growth-promoting activities of ring-alkylated (alkyl = 2-, 4-, 5-, 6-, or 7-methyl ; 4- or 5-ethyl ; 5-propyl or 5-butyl) derivatives of indole-3-acetic acid (IAA) in the Avena coleoptile straight-growth assay were determined and correlated with structural parameters. Auxin activity was expressed as the net elongation of coleoptile sections (in per cent of the response in control experiments with non-substituted IAA) at the optimal concentrations (about 4 ľmol/l) of the compounds examined. The elongations observed were dependent on the structures of the substituents and on their position at the indole nucleus. A methyl group in any but the 2-position increased biological activity up to 150% (5-methyl IAA). The elongation response decreased notably as the length of the alkyl chain increased. Thus, for example, 5-ethyl, 5-propyl, and 5-butyl IAA had 74%, 55%, and 46% of the growth-promoting activity of unsubstituted IAA.

Izvorni jezik
Engleski

Znanstvena područja
Kemija

POVEZANOST RADA