Movement of Several Herbicides Through Excised Plant Tissue

Taylor, T. D.; Warren, G. F.

doi:10.1017/s0043174500077353

Cited by 3 publications

(5 citation statements)

References 20 publications

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“…Extent of movement was similar in bean petiole, root, and hypocotyl sections. As shown in a previous paper (26), amiben was readily absorbed into the tissue sections, but none moved into the receptor disks of untreated tissue. It is possible that amiben is conjugated upon entering the cytoplasm and that this conjugate is irreversibly moved across the tonoplast into the vacuole.…”

Section: Resultssupporting

confidence: 50%

“…The petiole sections were placed apical end down on the donor disk for basipetal translocation and basal end down for acropetal translocation, thus allowing for movement of the labeled compound against gravity in both cases. A more thorough discussion of the experi mental system used is presented by Taylor and Warren (26).…”

Section: Methodsmentioning

confidence: 99%

“…The dinoseb treatment stimulated equally both acrop etal and basipetal 2,4-D movement through these tis sues, while total influx into the tissue was likewise stim ulated. Previous work (26) showed that 2,4-D was readily mobile through bean tissue, but some binding by the tissue was suggested. When the petiole sections were placed in a nitrogen atmosphere or pre treated with iodoacetate, the efflux and influx again were stimulated, but the effect was not as pronounced as that for dinoseb treatment.…”

Section: Log Molar Concentration Dinosebmentioning

confidence: 97%

“…IAA is transported in a basipetal direction to a much greater extent than in an acropetal direction (17,19,26). This polar transport is sensitive to such inhibitors as 2,3,5-triiodobenzoic acid and DNP (6).…”

Section: Log Molar Concentration Dinosebmentioning

confidence: 99%

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The Effect of Metabolic Inhibitors on Herbicide Movement in Plants

Taylor¹,

Warren²

1970

Weed sci.

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Pretreatment of bean (Phaseolus vulgarisL.) petiole sections with one of several metabolic inhibitors greatly stimulated the movement of 3-amino-2,5-dichlorobenzoic acid (amiben) and (2,4-dichlorophenoxy)acetic acid (2,4-D). However, the movement of 3-amino-s-triazole (amitrole), 3-(3,4-dichlorophenyl)-1-methylurea (linuron), and isopropylm-chlorocarbanilate (chlorpropham) was stimulated only slightly or not at all. The basipetal movement of indole-3-acetic acid (IAA) was inhibited by concentrations of 2-sec-butyl-4,6-dinitrophenol (dinoseb) which stimulated respiration (5 × 10−7M to 5 × 10−8M). Acropetal movement was stimulated by dinoseb concentrations greater than 10−5M. Translocation of root-applied amiben and 2,4-D to the stems and leaves of whole plants of bean, squash (Curcurbita pepoL.), and cucumber (Cucumis sativusL.) was stimulated by dinoseb root applications only at concentrations which were highly injurious to the plants. Amiben, 2,4-D, and their metabolites were extracted from dinosebtreated and untreated tissues. The stem exudate from cucumber plants fed amiben and 2,4-D via the roots contained primarily the parent compounds, which indicates that the parent compounds are the primary components translocated through the xylem.

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Section: Resultssupporting

confidence: 50%

Section: Methodsmentioning

confidence: 99%

Section: Log Molar Concentration Dinosebmentioning

confidence: 97%

Section: Log Molar Concentration Dinosebmentioning

confidence: 99%

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The Effect of Metabolic Inhibitors on Herbicide Movement in Plants

Taylor¹,

Warren²

1970

Weed sci.

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“…Several investigators have reported the movement of CIPC into seeds (Rieder et al, 1970) through excised petiole sections (Taylor and Warren, 1970). Prendeville et al (1968) showed that CIPC moved in intact plants, but that it did not move basipetally to any degree.…”

Section: Discussionmentioning

confidence: 99%

Metabolism of isopropyl 3-chlorocarbanilate by soybean plants

Still¹,

Mansager²

1971

J. Agric. Food Chem.

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Root-treated soybean plants absorb, translocate, and metabolize 14C-labeled isopropyl 3-chlorocarbanilate (CIPC-14C or chlorpropham-14C). Polar products and insoluble residues are rapidly formed in the roots. Insoluble residues are not found in the shoots. Time-course experiments showed that CIPC was lost from the treating solution by volatilization. Pulse time-course experiments demonstrated a precursor-product relationship between CIPC, polar products, and insoluble residues. Polar metabolites are not translocated once they are formed in either root or shoot tissues. The radiocar-bon distribution patterns of phenyl-14C and isopropyl-14C labeled CIPC were identical in all comparative experiments. Polar metabolites and insoluble residues from plants treated with isopropyl-14C labeled CIPC were hydrolyzed and steam distilled. The isolated alcohol was identified as 2-propanol. All of the radiocarbon in the soluble metabolites was recovered as 2-propanol. These data demonstrate that the CIPC carbanilate bond was not cleaved and that the isopropyl group was not altered by the plant.

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Translocation and Metabolism of Picloram and 2,4‐D in Populus tremula

Eliasson

Hallmén

1973

Physiologia Plantarum

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Translocation and metabolism of 4‐amino‐3,5,6‐trichloropicolinic acid (picloram) and 2,4‐dichlorophenoxyacetic acid (2,4‐D) in small plants of aspen (Populus tremula L.) were studied. In most experiments 14C‐carboxyl‐labelled herbicides were used. Considerable quantities of both herbicides were retained in the treated leaf. Translocation was mainly upwards into the growing shoot tip. Only minute quantities were found in the roots. Injection of the herbicides through a cut stem surface increased the translocation into the roots very little. One of the reasons for the limited downward translocation is considered to be a ready transfer of the herbicides between the phloem and the xylem. Both herbicides were incorporated into complexes from which the active herbicides could be released. However, this complex formation can only partly account for the retention of the herbicides in the treated leaves. The differences in metabolism found between 2,4‐D and picloram cannot explain the considerable difference in toxicity between the compounds.

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Movement of Several Herbicides Through Excised Plant Tissue

Cited by 3 publications

References 20 publications

The Effect of Metabolic Inhibitors on Herbicide Movement in Plants

The Effect of Metabolic Inhibitors on Herbicide Movement in Plants

Metabolism of isopropyl 3-chlorocarbanilate by soybean plants

Translocation and Metabolism of Picloram and 2,4‐D in Populus tremula

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