scholarly journals Transport of the Auxin 2,4-Dichlorophenoxyacetic Acid Through Absiccion Zones, Pulvini, and Petioles of Phaseolus vulgaris

1966 ◽  
Vol 41 (4) ◽  
pp. 725-730 ◽  
Author(s):  
W. P. Jacobs ◽  
C. C. McCready ◽  
Daphne J. Osborne
Keyword(s):  
Phaseolus Vulgaris ◽  
Dichlorophenoxyacetic Acid ◽  
2,4 Dichlorophenoxyacetic Acid

EXPERIMENTS ON THE RELATIVE SUSCEPTIBILITY OF WEEDS TO AUXIN HERBICIDES

1962 ◽  
Vol 40 (11) ◽  
pp. 1401-1409 ◽  
Author(s):  
J. R. Hay
Keyword(s):  
Phaseolus Vulgaris ◽  
Root Formation ◽  
Effective Control ◽  
Inorganic Salts ◽  
Dichlorophenoxyacetic Acid ◽  
Functional Importance ◽  
Molecular Configuration ◽  
Auxin Herbicides ◽  
Chlorophenoxyacetic Acid ◽  
2,4 Dichlorophenoxyacetic Acid

Sections of stems of Silene cucubalus, Galeopsis tetrahit, and Phaseolus vulgaris were cultured under sterile conditions in media containing inorganic salts, sucrose, agar, and the herbicides 2-methyl, 4-chlorophenoxyacetic acid, 2,4-dichlorophenoxyacetic acid, or 2-(2,4,5-trichlorophenoxy)propionic acid. The herbicide which gave the most effective control of a species under field conditions was also the most active in inducing root formation and proliferation on stem sections of that species. The response of the sections to these auxin herbicides diminished as the plants from which the sections were taken became more mature. The amount of herbicide recovered from treated shoots of these species was not correlated with susceptibility. It is postulated that susceptibility to these materials depends upon (i) the affinity of the species for the molecular configuration of the herbicide and (ii) the relative amount and functional importance of the susceptible tissues at the time of treatment.

Metabolic Fate of 2,4-Dichlorophenoxyacetic Acid in the Stem Tissue of Phaseolus vulgaris

Nature ◽  
1964 ◽  
Vol 204 (4961) ◽  
pp. 884-885 ◽  
Author(s):  
E. W. THOMAS ◽  
B. C. LOUGHMAN ◽  
R. G. POWELL
Keyword(s):  
Phaseolus Vulgaris ◽  
Dichlorophenoxyacetic Acid ◽  
Stem Tissue ◽  
Metabolic Fate ◽  
2,4 Dichlorophenoxyacetic Acid

THE UPTAKE AND DISTRIBUTION OF 32P BY BEAN SEEDLINGS (PHASEOLUS VULGARIS) GROWING AT TWO PHOSPHATE LEVELS, AND SOME EFFECTS OF 2,4-D

1967 ◽  
Vol 45 (7) ◽  
pp. 1011-1017 ◽  
Author(s):  
Harold M. Etter
Keyword(s):  
Phaseolus Vulgaris ◽  
Distribution Pattern ◽  
Organic Phosphorus ◽  
Phosphorus Fractions ◽  
Dichlorophenoxyacetic Acid ◽  
Free Solution ◽  
Leaf Tissues ◽  
2,4 Dichlorophenoxyacetic Acid

The uptake and subsequent distribution of 32P among the root, stem, and leaf tissues of bean seedlings growing in complete or phosphate-free nutrient and its incorporation into organic phosphorus fractions was studied. Plants growing in complete nutrient took up, retained, translocated, and incorporated less activity than those growing in phosphate-free solution. These results are discussed in relation to phosphate pools which appear to be present in bean seedlings. Fifty and 70 h after spraying with 5 p.p.m. 2,4-dichlorophenoxyacetic acid (2,4-D), no marked changes were observed in the uptake or distribution pattern of the 32P as compared to controls.

Translocation of Herbicides in Detached Bean Leaves

Weed Science ◽  
1968 ◽  
Vol 16 (3) ◽  
pp. 352-356 ◽  
Author(s):  
O. A. Leonard ◽  
R. K. Glenn
Keyword(s):  
Phaseolus Vulgaris ◽  
Phosphoric Acid ◽  
Dicarboxylic Acid ◽  
Prior Treatment ◽  
Dichlorophenoxyacetic Acid ◽  
Transport Studies ◽  
Detached Leaves ◽  
Upward Transport ◽  
2,4 Dichlorophenoxyacetic Acid ◽  
Bean Leaves

Labeled 2,4-dichlorophenoxyacetic acid (2,4-D), 2,4,5-trichlorophenoxyacetic acid (2, 4, 5-T), 2-methoxy-3,6-dichlorobenzoic acid (dicamba), 4-amino-3, 5, 6-trichloropicolinic acid (picloram), 1,2-dihydropyridazine-3,6-dione (MH), assimilates, and phosphoric acid were absorbed and transported basipetally from the lamina into the petioles of detached bean leaves (Phaseolus vulgaris L.). Upward transport in the lamina was slight, except when the petioles were in water. In contrast, labeled 3-(3,4-dichlorophenyl)-1,1-dimethylurea (diuron) was not transported basipetally, but some acropetal transport did occur. Vein-loading and transport of labeled assimilates, 2,4-D, dicamba, MH, and phosphate were greatly reduced by a prior treatment with 7-oxabicyclo(2.2.1)heptane-2,3-dicarboxylic acid (endothall). Detached leaves hold promise for use in absorption and transport studies.

Persistence of Benzoic and Phenylacetic Acids in Soils

Weed Science ◽  
1968 ◽  
Vol 16 (2) ◽  
pp. 217-222 ◽  
Author(s):  
T. J. Sheets ◽  
J. W. Smith ◽  
D. D. Kaufman
Keyword(s):  
Organic Matter ◽  
Phaseolus Vulgaris ◽  
Incubation Period ◽  
Microbial Degradation ◽  
Dichlorophenoxyacetic Acid ◽  
Experimental Conditions ◽  
Soil Enrichment ◽  
Snap Beans ◽  
Dry Soil ◽  
2,4 Dichlorophenoxyacetic Acid

In a greenhouse experiment, dosages of 2-methoxy-3,6-dichlorobenzoic acid [dicamba] and 2-methoxy-3,5,6-trichlorobenzoic acid [tricamba] required initially to reduce fresh weights of snap beans (Phaseolus vulgaris L.) 50% (hereinafter referred to as ED50 values) increased as clay and organic matter increased in five soils. In all soils, 2,3,6-trichlorobenzoic acid [2,3,6-TBA] was about equally toxic, but ED50 values for 2,3,6-trichlorophenylacetic acid [fenac] and 2-methoxy-3,6-dichlorophenylacetic acid [hereinafter referred to as methoxy fenac] decreased as clay and organic matter increased. Under experimental conditions of alternately moist and dry soil, phytotoxicity of dicamba, tricamba, and methoxy fenac decreased with time, but that of 2,3,6-TBA and fenac remained approximately the same for about 22 months. When soils were maintained moist throughout the incubation period, 3-amino-2,5-dichlorobenzoic acid [amiben] was least persistent, dicamba intermediate, and 2,3,6-TBA and fenac most; under these conditions, phytotoxic effects of 2,3,6-TBA and fenac decreased with time. In soil-enrichment studies, fenac, methoxy fenac, dicamba, and 2,3,6-TBA, in comparison with 2,4-dichlorophenoxyacetic acid [2,4-D], appeared very resistant to microbial degradation.

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