A comparison of the auxin specificity of medium acidification and elongation in maize coleoptiles

Mark Jacobs, T. Lomax, R. Hertel

Research output: Contribution to journalArticle

13 Citations (Scopus)

Abstract

Indole-3-acetic acid (IAA) and a variety of auxin analogs were tested at different concentrations for their capacity to induce short-term acidification and elongation in Zea mays L. coleoptile segments. In both tests, IAA and (+)-2,4-dichlorophenoxypropionic acid ((+)-2,4-DP) at 10-5 M stimulated most strongly, followed by (-)-alanyl-IAA ((-)-ALA), 1-naphthaleneacetic acid (1-NAA) and 2,4-dichlorophenoxyacetic acid (2,4-D). 2-Naphthoxy-acetic acid (2-NOA) and 2-naphthaleneacetic acid (2-NAA) weakly stimulated both H+ secretion and elongation at 10-5 M, but inhibited at 10-6 M. For most of the substances tested, including those which were ineffective or inhibitory, there was a good correlation between the measured effects upon medium acidification and elongation.

Original languageEnglish (US)
Pages (from-to)35-41
Number of pages7
JournalPlant Science Letters
Volume34
Issue number1-2
DOIs
StatePublished - 1984
Externally publishedYes

Fingerprint

Indoleacetic Acids
Cotyledon
coleoptiles
indole acetic acid
acidification
Zea mays
auxins
2,4-Dichlorophenoxyacetic Acid
naphthaleneacetic acid
2,4-D
corn
Acetic Acid
acetic acid
secretion
acids
indoleacetic acid
testing

Keywords

  • Acid secretion
  • Auxin specificity
  • Cell elongation
  • Coleoptile
  • Zea

Cite this

A comparison of the auxin specificity of medium acidification and elongation in maize coleoptiles. / Jacobs, Mark; Lomax, T.; Hertel, R.

In: Plant Science Letters, Vol. 34, No. 1-2, 1984, p. 35-41.

Research output: Contribution to journalArticle

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N2 - Indole-3-acetic acid (IAA) and a variety of auxin analogs were tested at different concentrations for their capacity to induce short-term acidification and elongation in Zea mays L. coleoptile segments. In both tests, IAA and (+)-2,4-dichlorophenoxypropionic acid ((+)-2,4-DP) at 10-5 M stimulated most strongly, followed by (-)-alanyl-IAA ((-)-ALA), 1-naphthaleneacetic acid (1-NAA) and 2,4-dichlorophenoxyacetic acid (2,4-D). 2-Naphthoxy-acetic acid (2-NOA) and 2-naphthaleneacetic acid (2-NAA) weakly stimulated both H+ secretion and elongation at 10-5 M, but inhibited at 10-6 M. For most of the substances tested, including those which were ineffective or inhibitory, there was a good correlation between the measured effects upon medium acidification and elongation.

AB - Indole-3-acetic acid (IAA) and a variety of auxin analogs were tested at different concentrations for their capacity to induce short-term acidification and elongation in Zea mays L. coleoptile segments. In both tests, IAA and (+)-2,4-dichlorophenoxypropionic acid ((+)-2,4-DP) at 10-5 M stimulated most strongly, followed by (-)-alanyl-IAA ((-)-ALA), 1-naphthaleneacetic acid (1-NAA) and 2,4-dichlorophenoxyacetic acid (2,4-D). 2-Naphthoxy-acetic acid (2-NOA) and 2-naphthaleneacetic acid (2-NAA) weakly stimulated both H+ secretion and elongation at 10-5 M, but inhibited at 10-6 M. For most of the substances tested, including those which were ineffective or inhibitory, there was a good correlation between the measured effects upon medium acidification and elongation.

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