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Uptake, translocation, metabolism and selectivity of glyphosate in Canada thistle and leafy spurge
Author(s) -
GOTTRUP O.,
O'SULLIVAN P. A.,
SCHRAA R. J.,
VANDEN W. H.
Publication year - 1976
Publication title -
weed research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.693
H-Index - 74
eISSN - 1365-3180
pISSN - 0043-1737
DOI - 10.1111/j.1365-3180.1976.tb00402.x
Subject(s) - glyphosate , thistle , cirsium arvense , leafy , chromosomal translocation , biology , glycine , botany , weed , apoplast , agronomy , biochemistry , amino acid , cell wall , gene
Summary: The uptake, translocation and metabolism of glyphosate [N‐(phosphonomethyl) glycine] by Canada thistle (Cirsium arvense (L.) Scop.) (susceptible) and leafy spurge (Euphorbia esula (L.)) (resistant) were examined in an attempt to elucidate the nature of the differential sensitivity. The pattern of uptake and translocation was similar in both species. Glyphosate moved readily in the apoplast and the symplast. High humidity and/or surfactant greatly increased the amount of 14 C‐glyphosate absorbed and translocated over that in low humidity and/or without surfactant. No 14 Cmetabolites were detected in either species 1 week after treatment with 14 C‐glyphosate. More of a glyphosate spray solution containing a fluorescent dye was received and retained on Canada thistle by virtue of its growth habit than on leafy spurge. More glyphosate should therefore be available for uptake by Canada thistle and this may account for the differential sensitivity of these two species.