Hostname: page-component-cb9f654ff-mwwwr Total loading time: 0 Render date: 2025-09-09T03:26:44.666Z Has data issue: false hasContentIssue false
  • English
  • Français

Effects of 2,4-D and MCPA on Germination and Early Growth

Published online by Cambridge University Press:  12 June 2017

M. Rojas-Garcidueñas ,
M. A. Ruiz  and
J. Carrillo
M. Rojas-Garcidueñas
Affiliation:
Botany, Instituto Technológico, Monterrey, N. L. (México)
M. A. Ruiz
Affiliation:
Departamento de Parasitologia y Botánica, Instituto Technológico, Monterrey, N. L. (México)
J. Carrillo
Affiliation:
Departamento de Parasitologia y Botánica, Instituto Technológico, Monterrey, N. L. (México)
Get access

Abstract

Wheat, bean, and pigweed (Amaranthus retroflexus) seeds were immersed in solutions of 2,4–D (ester) and MCPA (ester) ranging from 0.001 ppm. and then germinated in petri dishes. Both products induced analogous effects but MCPA appeared to be slightly less active. Germination in pigweed was promoted by the 0.1 ppm. solutions. Growth of plumule and radicle in wheat was stimulated by lower (0.001 to 1 ppm.) concentrations and depressed by higher ones (100 and 1000 ppm.), the threshold between stimulation and depression being around 10 to 100 ppm. depending on the product and the organ affected.

Information

Type
Research Article
Information
Weeds , Volume 10 , Issue 1 , January 1962 , pp. 69 - 71
Copyright
Copyright © 1962 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.)

Article purchase

Temporarily unavailable

References

Literature Cited

1. González, J., and Rojas-Garcidueñas, M. 1957. Acción del ácido 2,4–dichlorofenoxiacético en los meristemos apicales y zonas más diferenciadas del frijol (Phaseolus vulgaris L). Ciencia (Méx) 17:14–15.Google Scholar
2. Humphrey, T. E., and Dugger, W. M. Jr. 1957. The effect of 2,4–dichlorophenoxyacetic acid on the respiration of etiolated pea seedlings. Plant Physiol. 32:530–536.Google Scholar
3. Kelly, Sally and Avery, G. S. Jr. 1949. The effect of 2,4–dichlorophenoxyacetic acid and other physiologically active substances on respiration. Am. J. Bot. 36:421–426.Google Scholar
4. Muir, M. R., and Corwin, H. 1952. On the mechanisms of growth regulators. Plant Physiol. 28:218–230.Google Scholar
5. Osborne, D. J. 1958. Growth of etiolated sections of pea internode following exposures to indole-3-acetic acid, 2,4–dichlorophenoxyacetic acid and 2,5–dichlorobenzoic acid. Plant Physiol. 33:46–57.CrossRefGoogle Scholar
6. Ron, A., and Meyer, A. M. 1959. The effect of coumarin on growth and respiration of Chlorella . Bull Res. Counc. Israel Sect. D (Biol. Abst. 35:28–87).Google Scholar
7. Rojas-Garcidueñas, M., and Kommedahl, T. 1958. The effects of 2,4–dichlorophenoxyacetic acid on radicle development and stem anatomy of soybean. Weeds 6:49–51.CrossRefGoogle Scholar
8. Rojas-Garcidueñas, M., and Kommedahl, T. 1960. The effects of 2,4–D on germination of pigweed seed. Weeds 8:1–15.CrossRefGoogle Scholar
9. Thimann, K. V. 1937. On the nature of the inhibition caused by auxin. Am. J. Bot. 24:407–412.Google Scholar
10. Van Overbeek, J., Blondeau, J. R. and Horne, Vesta. 1951. Difference in activity between 2,4–dichlorophenoxyacetic acid and other auxins and the significance in herbicidal action. Plant Physiol. 26:687–695.Google Scholar