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Effect of herbicide resistance endowing Ile-1781-Leu and Asp-2078-Gly ACCase gene mutations on ACCase kinetics and growth traits in Lolium rigidum.

Vila-Aiub MM, Yu Q, Han H, Powles SB - J. Exp. Bot. (2015)

Bottom Line: Both the negligible and significant growth reductions associated, respectively, with the Ile-1781-Leu and Asp-2078-Gly resistance mutations correlated with their impact on ACCase activity.Whereas the Ile-1781-Leu mutation showed no pleiotropic effects on ACCase kinetics, the Asp-2078-Gly mutation led to a significant reduction in ACCase activity.Similar effects of these two particular ACCase mutations on the ACCase activity of Alopecurus myosuroides were also confirmed.

View Article: PubMed Central - PubMed

Affiliation: Australian Herbicide Resistance Initiative (AHRI) - School of Plant Biology, University of Western Australia, WA, 6009, Australia IFEVA - CONICET - Facultad de Agronomía, Universidad de Buenos Aires (UBA), Buenos Aires, 1417, Argentina vila@ifeva.edu.ar.

No MeSH data available.


Related in: MedlinePlus

Variations in above-ground vegetative biomass and leaf area of target ACCase herbicide–resistant mutants (RR) Ile-1781-Leu (●) and Asp-2078-Gly (▲) and susceptible wild-type (SS) (○) individuals (S1, S2, S3, and S4) under increasing biomass of wheat neighbour plants. Comparison of regression slopes (b parameter) determines hierarchies in per unit-size competitive responses of target plants to wheat neighbour plants.
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Figure 4: Variations in above-ground vegetative biomass and leaf area of target ACCase herbicide–resistant mutants (RR) Ile-1781-Leu (●) and Asp-2078-Gly (▲) and susceptible wild-type (SS) (○) individuals (S1, S2, S3, and S4) under increasing biomass of wheat neighbour plants. Comparison of regression slopes (b parameter) determines hierarchies in per unit-size competitive responses of target plants to wheat neighbour plants.

Mentions: As expected, an increase in wheat density negatively correlated with the intercepted radiation by target L. rigidum plants (Fig. 3). This led to a reduction in the size of the L. rigidum plants with increasing wheat competition (Fig. 4). However, as evident from the slopes of the regressions, reductions in both aerial biomass and leaf area of plants homozygous for the Ile-1781-Leu mutation were similar to those shown by the herbicide-susceptible wild-type plants (Fig. 4A-C).


Effect of herbicide resistance endowing Ile-1781-Leu and Asp-2078-Gly ACCase gene mutations on ACCase kinetics and growth traits in Lolium rigidum.

Vila-Aiub MM, Yu Q, Han H, Powles SB - J. Exp. Bot. (2015)

Variations in above-ground vegetative biomass and leaf area of target ACCase herbicide–resistant mutants (RR) Ile-1781-Leu (●) and Asp-2078-Gly (▲) and susceptible wild-type (SS) (○) individuals (S1, S2, S3, and S4) under increasing biomass of wheat neighbour plants. Comparison of regression slopes (b parameter) determines hierarchies in per unit-size competitive responses of target plants to wheat neighbour plants.
© Copyright Policy - creative-commons
Related In: Results  -  Collection

License 1 - License 2
Show All Figures
getmorefigures.php?uid=PMC4507778&req=5

Figure 4: Variations in above-ground vegetative biomass and leaf area of target ACCase herbicide–resistant mutants (RR) Ile-1781-Leu (●) and Asp-2078-Gly (▲) and susceptible wild-type (SS) (○) individuals (S1, S2, S3, and S4) under increasing biomass of wheat neighbour plants. Comparison of regression slopes (b parameter) determines hierarchies in per unit-size competitive responses of target plants to wheat neighbour plants.
Mentions: As expected, an increase in wheat density negatively correlated with the intercepted radiation by target L. rigidum plants (Fig. 3). This led to a reduction in the size of the L. rigidum plants with increasing wheat competition (Fig. 4). However, as evident from the slopes of the regressions, reductions in both aerial biomass and leaf area of plants homozygous for the Ile-1781-Leu mutation were similar to those shown by the herbicide-susceptible wild-type plants (Fig. 4A-C).

Bottom Line: Both the negligible and significant growth reductions associated, respectively, with the Ile-1781-Leu and Asp-2078-Gly resistance mutations correlated with their impact on ACCase activity.Whereas the Ile-1781-Leu mutation showed no pleiotropic effects on ACCase kinetics, the Asp-2078-Gly mutation led to a significant reduction in ACCase activity.Similar effects of these two particular ACCase mutations on the ACCase activity of Alopecurus myosuroides were also confirmed.

View Article: PubMed Central - PubMed

Affiliation: Australian Herbicide Resistance Initiative (AHRI) - School of Plant Biology, University of Western Australia, WA, 6009, Australia IFEVA - CONICET - Facultad de Agronomía, Universidad de Buenos Aires (UBA), Buenos Aires, 1417, Argentina vila@ifeva.edu.ar.

No MeSH data available.


Related in: MedlinePlus