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. 1987 May;53(5):974–978. doi: 10.1128/aem.53.5.974-978.1987

Uptake of Glyphosate by an Arthrobacter sp

Rüdiger Pipke 1, Arno Schulz 1, Nikolaus Amrhein 1,*
PMCID: PMC203797  PMID: 16347356

Abstract

The uptake of glyphosate (N-[phosphonomethyl]glycine) by an Arthrobacter sp. which can utilize this herbicide as its sole source of phosphorus was investigated. Orthophosphate suppressed the expression of the uptake system for glyphosate and also competed with glyphosate for uptake. The Km for glyphosate uptake was 125 μM, and the Ki for orthophosphate was 24 μM. Organophosphonates as well as organophosphates inhibited glyphosate uptake, but only organophosphates and orthophosphate suppressed the uptake system. Glyphosate uptake was energy dependent, had a pH optimum of 6 to 7, and was differentially affected by divalent cations.

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Selected References

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