Accumulation of shikimic acid: A technique for screening glyphosate efficacy

被引：61

作者：

Harring, T ^{[1
]}

Streibig, JC

Husted, S

机构：

[1] Cheminova Agro AS, Dept Res & Dev, DK-7620 Lemvig, Denmark

[2] Royal Vet & Agr Univ, Dept Agr Sci, DK-1871 Frederiksberg C, Denmark

来源：

JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY | 1998年 / 46卷 / 10期

关键词：

glyphosate; shikimic acid; efficacy; dose-response;

D O I：

10.1021/jf9802124

中图分类号：

S [农业科学];

学科分类号：

09 ;

摘要：

Biochemical changes in leaves of 3-week-old oil seed rape (Brassica napus L. cv. Iris) plants were determined shortly after treatment with different doses of glyphosate. Secondary effects of N-(phosphonomethyl)glycine (glyphosate) on activity of the enzyme phenylalanine ammonia-lyase was not related to dose of glyphosate by any known model within the first 48 h after spraying. Accumulation of shikimic acid was related to the dose of glyphosate by a nonlinear logistic dose-response model-as early as 5 h after spraying. Within the same period shikimic acid accumulation made it possible to distinguish between a formulation of the pure isopropylamine salt of glyphosate and formulations containing different surfactants. ED50 estimates based on accumulation of shikimic acid gave a good indication of the relative strength of the evaluated glyphosate formulations. Ranking of ED50 based on accumulation of shikimic acid was the same as achieved by visual assessment of plant death 14 days after spraying.

引用

页码：4406 / 4412

页数：7

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