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| DOI: | 10.1017/wsc.2019.1 |
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| Web URL(s): | https://bioone.org/journals/Weed-Science/volume-67/issue-3/wsc.2019.1/Multiple-Herbicide-Resistance-in-California-Italian-Ryegrass-Lolium-perenne-ssp/10.1017/wsc.2019.1.full
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| Publication Type:
| Refereed |
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| Author(s): | Tehranchian, Parsa;
Nandula, Vijay K.;
Matzrafi, Maor;
Jasieniuk, Marie |
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| Author Affiliation: | Tehranchian: Former Postdoctoral Research Fellow, Department of Plant Sciences, University of California-Davis, Davis, CA; Nandula: Research Plant Physiologist, Crop Production Systems Research Unit, U.S. Department of Agriculture, Agricultural Research Service, Stoneville, MS; Matzrafi: Postdoctoral Research Associate, Department of Plant Sciences, University of California-Davis, Davis, CA; Jasieniuk: Professor, Department of Plant Sciences, University of California-Davis, Davis, CA |
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| Title: | Multiple herbicide resistance in California Italian ryegrass (Lolium perenne ssp. multiflorum): Characterization of ALS-inhibiting herbicide resistance |
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| Source: | Weed Science. Vol. 67, No. 3, May 2019, p. 273-280. |
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| Publishing Information: | Champaign, Illinois: Weed Science Society of America |
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| # of Pages: | 8 |
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| Related Web URL: | https://www.cambridge.org/core/journals/weed-science/article/multiple-herbicide-resistance-in-california-italian-ryegrass-lolium-perenne-ssp-multiflorum-characterization-of-alsinhibiting-herbicide-resistance/AB72685F165A9577347CD0B177515010
Notes: Abstract only |
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| Keywords: | TIC Keywords: Acetolactate synthase-inhibiting herbicides; Glyphosate; Herbicide evaluation; Herbicide resistance; Imazamox; Lolium multiflorum; Mechanism of resistance; Mesosulfuron; Paraquat; Sethoxydim; Weed control
Author-Supplied Keywords: Cross-resistance; Imazamox; Mesosulfuron; Multiple resistance mechanism
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| Geographic Terms: | California |
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| Abstract/Contents: | "Multiple resistance to glyphosate, sethoxydim, and paraquat was previously confirmed in two Italian ryegrass [Lolium perenne L. ssp. multiflorum (Lam.) Husnot] populations, MR1 and MR2, in northern California. Preliminary greenhouse studies revealed that both populations were also resistant to imazamox and mesosulfuron, both of which are acetolactate synthase (ALS)-inhibiting herbicides. In this study, three subpopulations, MR1-A (from seed of MR1 plants that survived a 16X rate of sethoxydim), MR1-P (from seed of MR1 plants that survived a 2X rate of paraquat), and MR2 (from seed of MR2 plants that survived a 16X rate of sethoxydim), were investigated to determine the resistance level to imazamox and mesosulfuron, evaluate other herbicide options for the control of these multiple resistant L. perenne ssp. multiflorum, and characterize the underlying ALS-inhibitor resistance mechanism(s). Based on LD50 values, the MR1-A, MR1-P, and MR2 subpopulations were 38-, 29-, 8-fold and 36-, 64-, and 3-fold less sensitive to imazamox and mesosulfuron, respectively, relative to the susceptible (Sus) population. Only MR1-P and MR2 plants were cross-resistant to rimsulfuron, whereas both MR1 subpopulations were cross-resistant to imazethapyr. Pinoxaden (ACCase inhibitor [phenylpyrazoline 'DEN']) only controlled MR2 and Sus plants at the labeled field rate. However, all plants were effectively controlled (>99%) with the labeled field rate of glufosinate. Based on I50 values, MR1-A, MR-P, and MR2 plants were 712-, 1,104-, and 3-fold and 10-, 18-, and 5-fold less responsive to mesosulfuron and imazamox, respectively, than the Sus plants. Sequence alignment of the ALS gene of resistant plants revealed a missense singlenucleotide polymorphism resulting in a Trp-574-Leu substitution in MR1-A and MR1-P plants, heterozygous in both, but not in the MR2 plants. An additional homozygous substitution, Asp-376-Glu, was identified in the MR1-A plants. Addition of malathion or piperonyl butoxide did not alter the efficacy of mesosulfuron on MR2 plants. In addition, the presence of 2,4-D had no effect on the response of mesosulfuron on the MR2 and Sus. These results suggest an altered target site is the mechanism of resistance to ALS inhibitors in MR1-A and MR1-P plants, whereas a non-target site based resistance apparatus is present in the MR2 plants." |
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| Language: | English |
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| References: | 33 |
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| Note: | Tables
Graphs |
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| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Tehranchian, P., V. K. Nandula, M. Matzrafi, and M. Jasieniuk. 2019. Multiple herbicide resistance in California Italian ryegrass (Lolium perenne ssp. multiflorum): Characterization of ALS-inhibiting herbicide resistance. Weed Sci. 67(3):p. 273-280. |
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| DOI: 10.1017/wsc.2019.1 |
| Web URL(s):
https://bioone.org/journals/Weed-Science/volume-67/issue-3/wsc.2019.1/Multiple-Herbicide-Resistance-in-California-Italian-Ryegrass-Lolium-perenne-ssp/10.1017/wsc.2019.1.full
Last checked: 06/27/2019
Access conditions: Item is within a limited-access website
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MSU catalog number: b2203399a |
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