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2 bacterial enzymes confer resistanceto common herbicide, say MU researchers
Date:1/21/2011

d to produce the enzyme AAD-1, and the soybean plant engineered to produce the enzyme AAD-12.

The resulting plants were then subjected to herbicide treatment under greenhouse and field conditions at several locations and through multiple generations. Under all conditions, the plants exhibited excellent resistance to 2,4-D, even when applied at higher than normal levels. The corn plants exhibited none of the injuries commonly associated with treatment with 2,4-D, such as root malformations, and also were resistant to two grass herbicides. No negative effects on yield or other agronomic traits were observed in the transgenic corn or soybean plants.

Other advantages of 2,4-D include low cost, short environmental persistence, and low toxicity to humans and wildlife.

"Unlike glyphosate, which targets amino acid synthesis, 2,4-D is a hormone regulator. Because it has a different mode of action, 2,4-D is an ideal herbicide to deal with glyphosate-resistant weeds," said Zhang, who carried out the soybean transformation and contributed to some data analysis for the study.


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Contact: Melody Kroll
KrollMM@missouri.edu
573-884-4144
University of Missouri-Columbia
Source:Eurekalert

Page: 1 2

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