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 language | English (US) |
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Pages (from-to) | 35-41 |
Number of pages | 7 |
Journal | Plant Science Letters |
Volume | 34 |
Issue number | 1-2 |
DOIs | |
State | Published - Apr 1984 |
Externally published | Yes |
Keywords
- Acid secretion
- Auxin specificity
- Cell elongation
- Coleoptile
- Zea