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草甘膦被节杆菌属吸收

Uptake of Glyphosate by an Arthrobacter sp.

机构信息

Lehrstuhl für Pflanzenphysiologie, Ruhr-Universität Bochum, D 4630 Bochum, Federal Republic of Germany.

出版信息

Appl Environ Microbiol. 1987 May;53(5):974-8. doi: 10.1128/aem.53.5.974-978.1987.

DOI:10.1128/aem.53.5.974-978.1987
PMID:16347356
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC203797/
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 K(m) for glyphosate uptake was 125 muM, and the K(i) for orthophosphate was 24 muM. 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.

摘要

研究了一株能够将草甘膦（N-[膦酸甲基]甘氨酸）用作唯一磷源的节杆菌对草甘膦的吸收情况。正磷酸盐抑制了草甘膦摄取系统的表达，并与草甘膦竞争摄取。草甘膦摄取的 K(m)为 125 μM，K(i)为正磷酸盐 24 μM。有机膦酸酯以及有机磷酸酯抑制草甘膦摄取，但只有有机磷酸酯和正磷酸盐抑制摄取系统。草甘膦摄取依赖于能量，最适 pH 值为 6 到 7，并且受到二价阳离子的差异影响。

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本文引用的文献

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Selection and characterization of a carrot cell line tolerant to glyphosate.一种耐草甘膦胡萝卜细胞系的筛选与鉴定
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Uptake and distribution of N-phosphonomethylglycine in sugar beet plants.草甘膦在甜菜植株中的吸收与分布。
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Effect of Glyphosate on Intact Bean Plants (Phaseolus vulgaris L.) and Isolated Cells.草甘膦对完整菜豆植株（Phaseolus vulgaris L.）和分离细胞的影响。
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