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| Web URL(s): | https://scisoc.confex.com/scisoc/2018am/meetingapp.cgi/Paper/113042
Last checked: 11/16/2018
Requires: JavaScript |
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| Publication Type:
| Report |
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| Content Type: | Abstract or Summary only |
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| Author(s): | Liu, Wenwen;
Leon, Ramon G.;
Unruh, Bryan J.;
Kenworthy, Kevin E.;
MacDonald, Greg E.;
Trenholm, Laurie E. |
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| Author Affiliation: | Liu, Kenworthy, and MacDonald: Agronomy Department, University of Florida, Gainsville, FL; Leon: Department of Crop and Soil Sciences, North Carolina State University, Raleigh, NC; Unruh: Environmental Horticulture Department, University of Florida West Florida Research & Education Center, Jay, FL; Trenholm: Department of Environmental Horticulture, University of Florida, Gainesville, FL |
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| Title: | Characterization of fluazifop-P-butyl tolerance in six zoysiagrass cultivars |
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| Section: | C05 turfgrass science
Other records with the "C05 turfgrass science" Section
Applied pest management: Diseases and weeds (Includes student competition)
Other records with the "Applied pest management: Diseases and weeds (Includes student competition)" Section
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| Meeting Info.: | Baltimore, Maryland: November 4-7, 2018 |
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| Source: | ASA, CSSA and SSSA International Annual Meetings. 2018, p. 113042. |
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| Publishing Information: | [Madison, Wisconsin]: [American Society of Agronomy, Crop Science Society of America, and Canadian Society of Agronomy] |
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| # of Pages: | 1 |
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| Keywords: | TIC Keywords: Biomass; Cultivar evaluation; Fluazifop-P-butyl; Herbicide evaluation; Zoysia
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| Abstract/Contents: | "Twenty-seven zoysiagrass (Zoysia spp.) lines were screened for fluazifop-P-butyl tolerance under greenhouse conditions. The herbicide rate that caused 50% biomass reduction (GR50) and the rate that caused 50% injury (IR50) were calculated for each line. The three most tolerant and the three most susceptible lines were selected and then used for studying the physiological mechanisms responsible for fluazifop-P-butyl tolerance. Organophosphate insecticide phorate was used as a cytochrome P450 inhibitor to test the involvement of cytochrome mediated metabolism in fluazifop-P-butyl tolerance, but no changes in injury were observed when comparing phorate treated and non-treated plants after fluazifop-P-butyl application. Sequencing of the ACCase gene confirmed none of the seven previously reported mutations conferring resistance to ACCase-inhibiting herbicides in other species was present in any of the six zoysiagrass lines studied. Absorption and translocation rates were studied using C14 radiolabeled fluazifop-P-butyl. No difference in absorption was detected among lines at each individual harvest timing (1, 3, 7 and 10 days after treatment, DAT). However, radiolabeled fluazifop-P-butyl translocation to root and shoot tissue was higher for one of the susceptible lines, compared with that of other five lines. Additionally, this line exhibited the shortest time to reach 50% absorption (3.1 DAT). In metabolism experiments using treated leaves, at 7 days after application, two metabolites in addition to the parent fluazifop-P-butyl and fluazifop acid were detected in one of tolerant zoysiagrass lines. Our results suggest that the diversity in tolerance to fluazifop-P-butyl in zoysiagrass germplasm is most likely the result of a combination of different non-target site mechanisms such as uptake, translocation and compartmentation after absorption as well as detoxification through metabolism or conjugation." |
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| Language: | English |
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| References: | 0 |
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| Note: | This item is an abstract only!
"140-10" |
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| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Liu, W., R. G. Leon, B. J. Unruh, K. E. Kenworthy, G. E. MacDonald, and L. E. Trenholm. 2018. Characterization of fluazifop-P-butyl tolerance in six zoysiagrass cultivars. Agron. Abr. p. 113042. |
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Last checked: 11/16/2018
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