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Wednesday, October 9, 2024
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Searches the reference database - authors, title, abstract, and keywords fields. Not case sensitive.
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REFERENCES
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Chen, J., H. Huang, C. Zhang, S. Wei, Z. Huang, J. Chen, and X. Wang
.
2015
.
Mutations and amplification of
EPSPS
gene confer resistance to glyphosate in goosegrass (
Eleusine indica
)
.
Planta
242
:
859 - 868
.
Glyphosate has been used widely in the south of China. The high selection pressure from glyphosate use has led to the evolution of resistance to glyphosate in weeds. We investigated the molecular mechanisms of three recently discovered glyphosate-resistant
Eleusine indica
populations (R1, R2 and R3). The results showed that R1 and R2 had double Thr102Ile and Pro106Ser mutation and a single mutation of Pro106Leu in the 5-enolpyruvylshikimate-3-phosphate synthase (
EPSPS
) gene, respectively.
Escherichia coli
containing the mutated
EPSPS
genes was tolerant to glyphosate. EPSPS activity in R1 and R2 plants was higher than in the sensitive plants. There was no amino acid substitution in
EPSPS
gene in R3. However, expression of
EPSPS
in R3 plants was higher than in glyphosate-susceptible (S) population (13.8-fold) after glyphosate treatment. EPSPS enzyme activity in both R3 and S plants was inhibited by glyphosate, while shikimate accumulation in R3 was significantly lower than for the S population. Further analysis revealed that the genome of R3 contained 28.3-fold more copies of the
EPSPS
gene than that of susceptible population.
EPSPS
expression was positively correlated with copy number of
EPSPS
. In conclusion, mutation of the
EPSPS
gene and increased
EPSPS
expression are part of the molecular mechanisms of resistance to glyphosate in
Eleusine indica
.
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PERMISSION MUST BE OBTAINED FIRST if you intend to base a significant portion of a scientific paper on data derived from this site.
Cite this site as:
Heap, I. The International Survey of Herbicide Resistant Weeds. Online. Internet.
Wednesday, October 9, 2024
. Available
www.weedscience.org
Copyright � 1993-
2024
WeedScience.org All rights reserved. Fair use of this material is encouraged. Proper citation is requested.
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