Auxin Activity of Ring-Alkylated Derivatives of Indole-3-Acetic Acid

Branka Salopek; Eduard Dolusic; Volker Magnus

Auxin Activity of Ring-Alkylated Derivatives of Indole-3-Acetic Acid

Branka Salopek, Eduard Dolusic, Volker Magnus

Namur Research Institute for Life Sciences

Research output: Contribution in Book/Catalog/Report/Conference proceeding › Conference contribution

Abstract

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 -mol/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.

Original language	English
Title of host publication	Proceedings of abstracts of the papers of the Sixth Congress of Croatian Biologists, Opatija, Croatia, 22-26 September 1997
Pages	169-169
Number of pages	1
Publication status	Published - 1997
Event	6th Congress of Croatian Biologists, Opatija, Croatia - Opatija, Croatia Duration: 22 Sept 1997 → …

Conference

Conference	6th Congress of Croatian Biologists, Opatija, Croatia
City	Opatija, Croatia
Period	22/09/97 → …

Keywords

IAA
ring-alkylated IAA
indole-3-acetic acid
auxin activity

3 Conference contribution
3 Poster
2 Article

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.
Research output: Contribution to journal › Article › peer-review

Open Access
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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 proceeding › Conference 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 proceeding › Conference contribution

2 Participation in conference

Sedmi hrvatski bioloski kongres
Dolusic, E. (Contributor)
24 Sept 2000 → 29 Sept 2000
Activity: Participating in or organising an event types › Participation in conference
6th Congress of Croatian Biologists, Opatija, Croatia
Dolusic, E. (Poster)
22 Sept 1997 → 26 Sept 1997
Activity: Participating in or organising an event types › Participation in conference

Cite this

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title = "Auxin Activity of Ring-Alkylated Derivatives of Indole-3-Acetic Acid",

abstract = "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 -mol/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.",

keywords = " IAA, ring-alkylated IAA, indole-3-acetic acid, auxin activity",

author = "Branka Salopek and Eduard Dolusic and Volker Magnus",

year = "1997",

language = "English",

pages = "169--169",

booktitle = "Proceedings of abstracts of the papers of the Sixth Congress of Croatian Biologists, Opatija, Croatia, 22-26 September 1997",

note = "6th Congress of Croatian Biologists, Opatija, Croatia ; Conference date: 22-09-1997",

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TY - GEN

T1 - Auxin Activity of Ring-Alkylated Derivatives of Indole-3-Acetic Acid

AU - Salopek, Branka

AU - Dolusic, Eduard

AU - Magnus, Volker

PY - 1997

Y1 - 1997

N2 - 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 -mol/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.

AB - 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 -mol/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.

KW - IAA

KW - ring-alkylated IAA

KW - indole-3-acetic acid

KW - auxin activity

M3 - Conference contribution

SP - 169

EP - 169

BT - Proceedings of abstracts of the papers of the Sixth Congress of Croatian Biologists, Opatija, Croatia, 22-26 September 1997

T2 - 6th Congress of Croatian Biologists, Opatija, Croatia

Y2 - 22 September 1997

ER -

Auxin Activity of Ring-Alkylated Derivatives of Indole-3-Acetic Acid

Abstract

Conference

Keywords

Fingerprint

Research output

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

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

Molecular recognition of the plant hormone auxin is still a puzzle

Activities

Sedmi hrvatski bioloski kongres

6th Congress of Croatian Biologists, Opatija, Croatia

Cite this