Journal ArticleDOI
Absorption, translocation and metabolism of 14C -glyphosate in several weed species.
TLDR
Field bindweed, Canada thistle, and tall morningglory metabolized the parent glyphosate to aminomethylphosphonic acid to a limited extent and 14C applied to excised leaves had disappeared within 25 days.Abstract:
Summary:
The pattern and extent of 14C-glyphosate [N-(phosphonomethyl)glycine] translocation from the treated leaf and metabolism of 14C-glyphosate were studied in field bindweed (Convolvulus arvensis L.), hedge bindweed (Convolvulus sepium L.). Canada thistle [Cirsium arvense (L.) Scop.] tall morning glory [lpomoea purpurea (L.) Roth.] and wild buckwheat (Polygonum convolvulus L.). 14C was translocated throughout the plants within 3 days with accumulation in the meristematic tips of the roots and shoots evident. Cross and longitudinal sections of stems and roots showed that the 14C was localized in the phloem. Field bindweed translocated 3–5% of the applied 14C from the treated leaf, hedge bindweed 21.6%, Canada thistle 7.8%, tall morningglory 6.5%, and wild buckwheat 5%. Field bindweed, Canada thistle, and tall morningglory metabolized the parent glyphosate to aminomethylphosphonic acid to a limited extent. This metabolite made up less than 15% of the total 14C. Of the total 14C applied to excised leaves, 50% had disappeared within 25 days.read more
Citations
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Journal ArticleDOI
Glyphosate in the environment
S. M. Carlisle,Jack T. Trevors +1 more
TL;DR: This manuscript reviews glyphosate metabolism in plants and yeasts, its uses in agricultural applications, interactions with soil and water, glyphosate biodegradation, and effects on microbial activities and populations in soil.
Journal ArticleDOI
Recent synthesis of aminophosphonic acids as potential biological importance
TL;DR: This review summarizes recent developments in the synthesis, characterization and biological activity of α-aminophosphonic acid and N-analogues and indicates one of the potential future developments is peptide hydrolysis.
Journal ArticleDOI
Glyphosate Degradation in Glyphosate-Resistant and -Susceptible Crops and Weeds
TL;DR: There is no evidence that metabolic degradation plays a significant role in evolved resistance to glyphosate, which is unexpected, considering the extreme selection pressure for evolution of glyphosate resistance in weeds and the difficulty in plants of evolving glyphosate resistance via other mechanisms.
Journal ArticleDOI
Tolerance and accumulation of shikimic acid in response to glyphosate applications in glyphosate-resistant and nonglyphosate-resistant cotton (Gossypium hirsutum L.).
TL;DR: Increased sensitivity to glyphosate of reproductive structures to glyphosate inhibition may be due to a higher demand for shikimate pathway products and may provide an explanation for reports of fruit abortion from glyphosate-treated GR cotton.
Journal ArticleDOI
Pool of Resistance Mechanisms to Glyphosate in Digitaria insularis
Leonardo Bianco de Carvalho,Pedro Luis da Costa Aguiar Alves,Fidel González-Torralva,Hugo E. Cruz-Hipolito,Antonia M. Rojano-Delgado,Rafael De Prado,Javier Gil-Humanes,Francisco Barro,María Dolores Luque de Castro +8 more
TL;DR: Two amino acid changes were found at positions 182 and 310 in EPSPS, consisting of a proline to threonine and a tyrosine to cysteine substitution, respectively, in resistant biotypes, suggesting that absorption, translocation, metabolism, and gene mutation play an important role in the D. insularis glyphosate resistance.
References
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Journal ArticleDOI
Adsorption, Mobility, and Microbial Degradation of Glyphosate in the Soil
TL;DR: Glyphosate [N-(phosphonomethyl)glycine] was readily bound to kaolinite, illite, and bentonite clay and to charcoal and muck but not to ethyl cellulose as mentioned in this paper.
Journal ArticleDOI
Absorption, Action, and Translocation of Glyphosate
TL;DR: The respiration of quackgrass treated with glyphosate was significantly reduced 9 days after treatment, and Glyphosate reduced total photosynthesis more in quack Grass than in wheat.
Journal ArticleDOI
Absorption, Translocation, and Metabolism of 2,4-D and Glyphosate in Common Milkweed and Hemp Dogbane
J. B. Wyrill,O. C. Burnside +1 more
TL;DR: In this paper, field and greenhouse studies of 2,4-D and glyphosate [N-(phosphonomethyl) glycine] absorption, translocation, and metabolism were initiated to explain field observations which indicated susceptibility of common milkweed (Asclepias syriaca L.) but not hemp dogbane (Apocynum cannabinum L.) to glyphosate and the reverse response to 2, 4-D.
Journal ArticleDOI
Separation of glyphosate and possible metabolites by thin-layer chromatography.
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