We found a match
Your institution may have access to this item. Find your institution then sign in to continue.
- Title
Glyphosate-increased levels of indole-3-acetic acid in yellow nutsedge leaves correlate with gentisic acid levels.
- Authors
Jesús Cañal, María; Sánchez Tamés, Ricardo; Fernández, Belén
- Abstract
The effects of glyphosate [N-(phosphonomethyl)glycine] on endogenous indole-3-acetic add (IAA) level, IAA oxidase activity, and possible interactions with alterations in phenolic metabolism have been examined in yellow nutsedge (Cyperus esculentus L.) plants. IAA was quantified by flame ionization detector gas-chromatography, phenols were quantified by high-performance liquid chromatography and the auxin protection and the IAA oxidase activities were determined spectrophotometrically and/or polarographically. A significant increase in IAA content was recorded after glyphosate treatment. No IAA oxidase activity was detected in control and treated tissues. Auxin protection activity and gentisic acid were present in all extracts assayed, and their concentrations increased as the rate of glyphosate application increased. Addition of gentisic acid to an extract of control plants increased the auxin protection detected, These findings indicate that the high levels of free IAA in yellow nutsedge leaves after glyphosate application are due to the inhibition of the IAA oxidase activity by increased levels of the IAA-protecting phenol gentisic acid.
- Subjects
PHYSIOLOGICAL effects of glyphosate; INDOLEACETIC acid; CHUFA; PLANT enzymes; ENZYME kinetics; LEAVES; BIOLOGICAL assay
- Publication
Physiologia Plantarum, 1987, Vol 71, Issue 3, p384
- ISSN
0031-9317
- Publication type
Article
- DOI
10.1111/j.1399-3054.1987.tb04360.x