Hostname: page-component-745bb68f8f-v2bm5 Total loading time: 0 Render date: 2025-01-30T06:01:38.434Z Has data issue: false hasContentIssue false
  • English
  • Français

Some Effects of Humidity on the Translocation of 2,4,5-T in Bean Plants

Published online by Cambridge University Press:  12 June 2017

Eddie Basler ,
Fred W. Slife  and
John W. Long
Eddie Basler
Affiliation:
Oklahoma Agricultural Experiment Station, Stillwater, Oklahoma
Fred W. Slife
Affiliation:
Department of Agronomy, University of Illinois, Urbana, Illinois
John W. Long
Affiliation:
Department of Botany and Plant Pathology, Oklahoma Agricultural Experiment Station, Stillwater, Oklahoma
Get access Rights & Permissions [Opens in a new window]

Abstract

The effect of humidity on the rate and direction of translocation of stem-injected (2,4,5-trichlorophenoxy)acetic acid (2,4,5-T) in bean (Phaseolus vulgaris L., var. Stringless Green-pod) seedlings was determined. A total of 0.75 μg of 14C-labeled 2,4,5-T was injected into the stem with a 1-μl syringe pipette. Translocation was determined by assaying the nutrient solution and plant parts for 14C. High relative humidities enhanced downward translocation to roots and nutrient solutions. About 41% of the applied 2,4,5-T was found in the nutrient solution after 2 days' treatment at about 95% relative humidity while only 23% was found when treatment was conducted at 20% relative humidity. Low humidity during treatment caused much more 2,4,5-T to be translocated upward to the primary leaves and young shoots of the seedlings and this effect was more pronounced in plants which were grown in low humidity prior to treatment. The results confirm the conclusions of others and show that the increased basipetal phloem transport of herbicides in plants under high humidity is not due to an effect on penetration of herbicides in leaf tissue.

Type
Research Article
Information
Weed Science , Volume 18 , Issue 3 , May 1970 , pp. 396 - 398
Copyright
Copyright © 1970 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. Basler, E., Todd, G. W., and Meyer, R. E. 1961. Effects of moisture stress on absorption, translocation, and distribution of 2,4-dichlorophenoxyacetic acid in bean plants. Plant Physiol. 36:573–576.Google Scholar
2. Clor, M. A., Crafts, A. S., and Yamaguchi, S. 1962. Effects of high humidity on translocation of foliar-applied labeled compounds in plants. Part I. Plant Physiol. 37:609–617.Google Scholar
3. Crafts, A. S. 1961. Translocation in Plants. Holt, Rinehart, and Winston, New York, N.Y. 182 p.Google Scholar
4. Eliasson, L. 1965. Interference of the translocation stream with the basipetal translocation of leaf-applied chlorophenoxy herbicides in aspen (Populus tremula) Physiol. Plant. 18:506–515.Google Scholar
5. Merkle, M. G. and Davis, F. S. 1967. Effect of moisture stress on absorption and movement of picloram and 2,4,5-T in beans. Weeds 15:10–12.Google Scholar
6. Morton, H. L. 1966. Influence of temperature and humidity on absorption, translocation, and metabolism of 2,4,5-T by mesquite seedlings. Weeds 14:136–141.CrossRefGoogle Scholar
7. Pallas, J. E. 1960. Effects of temperature and humidity on foliar absorption and translocation of 2,4-dichlorophenoxy acetic acid and benzoic acid. Plant Physiol. 35:574–580.Google Scholar
8. Pallas, J. E. and Williams, G. G. 1962. Foliar absorption and translocation of P32 and 2,4-D as affected by soil moisture tension. Botan. Gaz. 123:175–180.CrossRefGoogle Scholar