Hostname: page-component-8448b6f56d-dnltx Total loading time: 0 Render date: 2024-04-23T10:29:31.126Z Has data issue: false hasContentIssue false
  • English
  • Français

Interaction of Glyphosate with Aromatic Amino Acids on Transpiration in Phaseolus vulgaris

Published online by Cambridge University Press:  12 June 2017

D. L. Shaner  and
J. L. Lyon
D. L. Shaner
Affiliation:
Dep. Botany and Plant Sci., Univ. of California, Riverside, CA 92521
J. L. Lyon
Affiliation:
Dep. Botany and Plant Sci., Univ. of California, Riverside, CA 92521
Get access Rights & Permissions [Opens in a new window]

Abstract

When glyphosate [N-(phosphonomethyl)glycine] was fed through the transpiration stream of excised bean (Phaseolus vulgaris L. ‘Red Kidney’) shoots, it was readily absorbed and transported to the leaves where it inhibited transpiration. Maximum inhibition (40 to 50%) resulted from tissue concentrations of 50 to 3000 nmoles glyphosate/g fresh weight, while transpiration was significantly inhibited (20%) by as little as 15 nmoles/g fresh weight. A combination of 5 X 10-4M tyrosine (Tyr) and 5 x 10-4M phenylalanine (Phe) supplied continuously through the transpiration stream prevented the inhibition of transpiration by glyphosate during the course of 8-h experiments. Tyrosine (10-3M) alone delayed the transpiration response to glyphosate by 2 to 3 h but 10-3M Phe alone did not affect the inhibition by glyphosate. Levels of endogenous Tyr and Phe were about 50% lower in glyphosate-treated leaves than in the controls 6 h after treatment.

Keywords

Tryptophantyrosinephenylalanine14C-glyphosate
Type
Research Article
Information
Weed Science , Volume 28 , Issue 1 , January 1980 , pp. 31 - 35
Copyright
Copyright © 1980 by the Weed Science Society of America 

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

Literature Cited

1. Ali, A. and Fletcher, R. A. 1978. Phytotoxic action of glyphosate and amitrole on corn seedlings. Can. J. Bot. 56:2196–2202.CrossRefGoogle Scholar
2. Duke, S. O. and Hoagland, R. E. 1978. Effects of glyphosate on metabolism of phenolic compounds. I. Induction of phenylalanine ammonia-lyase activity in dark-grown maize roots. Plant Sci. Lett. 11:185–190.CrossRefGoogle Scholar
3. Haderlie, L. C., Widholm, J. M., and Slife, F. W. 1977. Effect of glyphosate on carrot and tobacco cells. Plant Physiol. 60:40–43.CrossRefGoogle ScholarPubMed
4. Jaworski, E. C. 1972. Mode of action of N-phosphonomethylglycine: Inhibition of aromatic amino acid biosynthesis. J. Agric. Food Chem. 20:1195–1198.CrossRefGoogle Scholar
5. Labanauskas, C. K. and Handy, M. F. 1971. Protein and nonprotein amino acids in Citrus leaves as affected by sample preparation and species differences. J. Am. Soc. Hortic. Sci. 96:514–518.CrossRefGoogle Scholar
6. Nilsson, G. 1977. Effects of glyphosate on the amino acid content in spring wheat plants. Swed. J. Agric. Res. 7:153–157.Google Scholar
7. Roisch, U. and Lingens, F. 1974. Effect of the herbicide N-phosphonomethylglycine on the biosynthesis of aromatic amino acids. Angew. Chem. Int. Ed. Engl. 13:400.CrossRefGoogle ScholarPubMed
8. Shaner, D. L. 1978. Effects of glyphosate on transpiration. Weed Sci. 26:513–515.CrossRefGoogle Scholar
9. Shaner, D. L. and Lyon, J. L. 1979. Stomatal cycling in Phaseolus vulgaris L. in response to glyphosate. Plant Sci. Lett. 15:83–87.Google Scholar
10. Sprankle, P., Meggitt, W. F., and Penner, D. 1975. Absorption, action, and translocation of glyphosate. Weed Sci. 23:235–240.Google Scholar