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Influence of Temperature and Humidity on Foliar Absorption, Translocation, and Metabolism of 2,4,5-T by Mesquite Seedlings

Published online by Cambridge University Press:  12 June 2017

Howard L. Morton
Howard L. Morton*
Affiliation:
Crops Research Division, Agricultural Research Service, U. S. Department of Agriculture, College Station, Texas
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Abstract

Foliar absorption of carboxyl-labeled 2,4,5-trichlorophenoxyacetic acid (2,4,5-T) by mesquite [Prosopis juliflora var. glandulosa (Torr.) Cockerel] seedlings was continuous throughout a 72-hr period. Approximately 50% of the 2,4,5-T applied to a single leaf was absorbed when 5 to 100 μg were applied. No significant differences were found in the amounts of 2,4,5-T absorbed at 70 and 85 F, but an increase occurred at 100 F after 72 hr. Only slight differences in absorption were found at different humidity levels. Translocation was primarily basipetal from the point of application at 70 F, both acropetal and basipetal at 85 F, and only a short distance acropetal at 100 F. The quantities of 2,4,5-T translocated into untreated tissues at 100 F were less than at 70 and 85 F. The highest concentrations of 2,4,5-T were found in tissues with highest soluble sugar concentrations. From 3 to 27% of the 2,4,5-T absorbed by mesquite leaves was subsequently detected in untreated stem, leaf, and root tissues.

Approximately 80% of the 2,4,5-T absorbed by mesquite leaves was metabolized after 24 hr. Moving the seedlings to a different environment at the time of treatment increased the rate of 2,4,5-T metabolism. Metabolism of 2,4,5-T was completely inhibited at 50 F and a lower rate of metabolism was noted at 100 than at 70 and 85 F. No important differences in metabolism were found at different humidity levels.

Type
Research Article
Information
Weeds , Volume 14 , Issue 2 , April 1966 , pp. 136 - 141
Copyright
Copyright © 1966 Weed Science Society of America 

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References

Literature Cited

1. Anonymous. 1959. How to use radioactivity in paper chromatography. Nuclear-Chicago Corp. Technical Bulletin No. 4.Google Scholar
2. Barrier, G. E. and Loomis, W. E. 1957. Absorption and translocation of 2,4-dichlorophenoxyacetic acid and P32 by leaves. Plant Physiol. 32:225–231.CrossRefGoogle Scholar
3. Behrens, R. and Morton, H. L. 1960. An environment system for plant studies with controlled temperature, humidity and light. Weeds 8:182–186.CrossRefGoogle Scholar
4. Butts, J. S. and Fang, S. C. 1956 Tracer studies on the mechanism of action of hormonal herbicides. Proc. Conf. on radioactive isotopes in agr. AEC Rpt. TID-7512:209–214.Google Scholar
5. 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.CrossRefGoogle ScholarPubMed
6. Clor, M. A., Crafts, A. S., and Yamaguchi, S. 1964. Translocation of C14-labeled compounds in cotton and oaks. Weeds 12:194–200.CrossRefGoogle Scholar
7. Crafts, A. S. 1960. Evidence for hydrolysis of esters of 2,4-D during absorption by plants. Weeds 8:19–25.CrossRefGoogle Scholar
8. Crafts, A. S. and Yamaguchi, S. 1960. Absorption of herbicides by roots. Am. J. Bot. 47:248–255.CrossRefGoogle Scholar
9. Dalrymple, A. V. and Basler, E. 1963. Seasonal variation in absorption and translocation of 2,4,5-trichlorophenoxyacetic acid and respiration rates in blackjack oaks. Weeds 11:41–45.CrossRefGoogle Scholar
10. Fang, S. C. 1958. Absorption, translocation and metabolism of 2,4,D-1-C14 in pea and tomato plants. Weeds 6:179–186.CrossRefGoogle Scholar
11. Fites, R. C., Slife, F. W., and Hanson, J. B. 1964. Translocation and metabolism of radioactive 2,4-D in jimsonweed. Weeds 12:180–183.CrossRefGoogle Scholar
12. Hull, H. M. 1956. Studies on herbicidal absorption and translocation in velvet mesquite seedlings. Weeds 4:22–42.CrossRefGoogle Scholar
13. Jaworski, E. G. and Butts, J. S. 1952. Studies in plant metabolism. II. The metabolism of C14-labeled 2,4-dichlorophenoxyacetic acid in bean plants. Arch. Biochem. Biophys. 38:207–218.CrossRefGoogle Scholar
14. Kelly, Sally. 1949. The effect of temperature on the susceptibility of plants to 2,4-D. Plant Physiol. 24:534–536.CrossRefGoogle Scholar
15. Leonard, O. A. and Crafts, A. S. 1956. Translocation of herbicides. III. Uptake and distribution of radioactive 2,4-D by brush species. Hilgardia 26:366–415.CrossRefGoogle Scholar
16. Maxie, E. C., Bradley, M. V., Robinson, B. J., and Hewitt, A. A. 1959. Distribution of C14 from carboxyl-labeled 2,4,5-trichlorophenoxyacetic acid in fruit tissues of Tilton apricot. Proc. Am. Soc. Hort. Sci. 73:134–144.Google Scholar
17. Mitchell, J. W. and Brown, J. W. 1946. Movement of 2,4-dichlorophenoxyacetic acid stimulus and its relation to the translocation of organic materials in plants. Bot. Gaz. 107:393–407.CrossRefGoogle Scholar
18. Mitchell, J. W., Livingston, G. A. and Marth, P. C. 1958. Test methods with plant-regulating chemicals. U. S. Department of Agriculture, Agricultural Handbook No. 126.Google Scholar
19. Pallas, J. E. 1960. Effects of temperature and humidity on foliar absorption and translocation of 2,4-dichlorophenoxyacetic acid and benzoic acid. Plant Physiol. 35:574–580.CrossRefGoogle Scholar
20. Rice, E. L. 1948. Absorption and translocation of ammonium 2,4-dichlorophenoxyacetate by bean plants. Bot. Gaz. 109: 301–314.CrossRefGoogle Scholar
21. Slife, F. W., Key, J. L., Yamaguchi, S., and Crafts, A. S. 1962. Penetration, translocation and metabolism of 2,4-D and 2,4,5-T in wild and cultivated cucumber plants. Weeds 10:29–35.CrossRefGoogle Scholar
22. Walker, L. C., Beck, E., and Dumbroff, E. 1959. Absorption rates of 2,4,5-T tagged with carbon-14. For. Sci. 5:128–137.Google Scholar
23. Weintraub, R. L., Reinhart, J. H., Scherff, R. A., and Schisler, L. C. 1954. Metabolism of 2,4-dichlorophenoxyacetic acid. III. Metabolism and persistence in dormant plant tissue. Plant Physiol. 29:303–304.CrossRefGoogle Scholar
24. Wildman, S. G. and Hansen, E. 1940. A semi-micro method for determination of reducing sugars. Plant Physiol. 15:719–725.CrossRefGoogle ScholarPubMed
25. Zukel, J. W., Smith, A. E., Stone, G. M., and Davies, M. E. 1956. Effect of some factors on rate of absorption of maleic hydrazide. Plant Physiol. 31 (suppl.):xxi.Google Scholar