Hostname: page-component-cd9895bd7-fscjk Total loading time: 0 Render date: 2024-12-29T19:15:03.888Z Has data issue: false hasContentIssue false
  • English
  • Français

Effect of Glyphosate on Membrane Permeability in Red Beet (Beta vulgaris) Root Tissue

Published online by Cambridge University Press:  12 June 2017

R. A. Fletcher ,
P. Hildebrand  and
W. Akey
R. A. Fletcher
Affiliation:
Dep. Environ. Biol., Univ. of Guelph, Guelph, Ontario, Canada. N1G 2W1
P. Hildebrand
Affiliation:
Dep. Environ. Biol., Univ. of Guelph, Guelph, Ontario, Canada. N1G 2W1
W. Akey
Affiliation:
Dep. Environ. Biol., Univ. of Guelph, Guelph, Ontario, Canada. N1G 2W1
Get access Rights & Permissions [Opens in a new window]

Abstract

When discs of red beet (Beta vulgaris L.) root were immersed in various concentrations of glyphosate [N-(phosphonomethyl)glycine] either in phosphate (pH 6.8) or citrate (pH 6.2) buffer, no efflux of betacyanin occurred even after 1 week. This suggests that glyphosate had little or no effect on membrane permeability. When beet discs were immersed in distilled water containing glyphosate, the betacyanin efflux increased with time and concentration. Measurement of pH indicated that the solutions were strongly acidic at first, but tended to approach a pH of 6.0 over 8 h, after which time betacyanin efflux slowed down or stopped. The tissue was able to buffer the solutions sufficiently to prevent further efflux. When tissue discs were immersed in a series of citrate buffer ranging from pH 3 to 6.2, efflux occurred at pH 3 and slightly at pH 6.2. Efflux was not altered significantly with the addition of glyphosate.

Keywords

BufferbetacyaninpH
Type
Research Article
Information
Weed Science , Volume 28 , Issue 6 , November 1980 , pp. 671 - 673
Copyright
Copyright © 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. Campbell, W. F., Evans, J. D., and Reed, S. C. 1976. Effects of glyphosate on chloroplast ultrastructure of quackgrass mesophyll cells. Weed Sci. 24:22–25.Google Scholar
3. 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.Google Scholar
4. Gottrup, O., O'Sullivan, P. A., Schraa, R. J., and VandenBorn, W. J. 1976. Uptake, translocation, metabolism and selectivity of glyphosate in Canada thistle and leafy spurge. Weed Res. 16:1–5.CrossRefGoogle Scholar
5. Jaworski, E. G. 1972. Mode of action of N-phosphono-methylglycine: inhibition of aromatic amino acid biosynthesis. J. Agric. Food Chem. 20:1195–1198.Google Scholar
6. Klingman, G. D. and Ashton, F. M. 1975. Weed Science: Principles and Practices. Pages 146–147. John Wiley and Sons, New York.Google Scholar
7. Prendeville, G. N. and Warren, G. F. 1977. Effect of four herbicides and two oils on leaf-cell membrane permeability. Weed Res. 30:251–258.Google Scholar
8. Sprankle, P., Meggit, W. F., and Penner, D. 1975. Adsorption, mobility and microbial degradation of glyphosate in the soil. Weed Sci. 23:229–234.Google Scholar
9. Sutton, D. L. and Foy, C. L. 1971. Effect of diquat and several surfactants on membrane permeability in red beet root tissue. Bot. Gaz. 132:299–304.Google Scholar
10. Wilkinson, R. E. and Smith, A. E. 1976. EPTC altered beet disc betacyanin efflux and fatty acid synthesis. Weed Sci. 24:235–238.Google Scholar