Full TGIF Record # 324917
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Web URL(s):https://scisoc.confex.com/scisoc/2022am/meetingapp.cgi/Paper/143461
    Last checked: 01/24/2023
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Publication Type:
Content Type:Abstract or Summary only
Author(s):Deaton, Brody; Raymer, Paul; Chen, Zhenbang; Xue, Jihong
Author Affiliation:Deaton: Presenting Author and University of Georgia Experiment Station; Raymer: University of Georgia - Griffin; Chen and Xue: University of Georgia
Title:Obtaining dinitroaniline resistance in tall fescue (Schedonorus arundinaceus)
Section:Turfgrass science oral I (includes student competition)
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C05 turfgrass science
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Meeting Info.:Baltimore, Maryland: November 6-9, 2022
Source:ASA, CSSA, SSSA International Annual Meeting. 2022, p. 143461.
Publishing Information:[Madison, Wisconsin]: [American Society of Agronomy, Crop Science Society of America, and Soil Science Society of America]
# of Pages:1
Abstract/Contents:"Dinitroanilines have been used globally for decades as pre-emergence herbicides for weed control. A consequence of this prolonged use has been the development of resistance to these herbicides in twelve different weed species. The reported cases of resistance credit mutations within the alpha-tubulin protein that confer resistance to dinitroaniline herbicides. The reported mutations are Leu-125-Met, Leu-136-Phe, Val-202-Phe, Thr-239-Ile, Met-268-Thr, Arg-243-Met/Lys. There are no reported cases of dinitroaniline resistance within turfgrass species. The goal of this research is to obtain and utilize mutations conferring resistance to dinitroaniline herbicides to improve weed control options in tall fescue (Schedonorus arundinaceus). Tissue culture was used to select for mutations conferring dinitroaniline resistance. Experiments to determine callus response to pendimethalin dosage indicated 3 ┬Ámoles pendimethalin should be effective to select for tolerant tissue. Tall fescue calli were grown on modified MS/B5D2 media containing 3 ┬Ámoles pendimethalin for 2 or 3 one-month-cycles. Calli demonstrating significant growth were selected for regeneration and 141 putative resistant plants were successfully established under greenhouse conditions. A hydroponic protocol was used to confirm pendimethalin-resistant phenotypes. The parent line (control) and possible resistant genotypes were separated into tillers, roots trimmed to 1 cm, and suspended in 5.4 L tubs containing one-half strength Hoagland solution with pendimethalin at rates of 0, 1, 2, 4, and 8 ┬Ámoles. After one month the tillers were harvested and root weight, root length, and visual rating of roots were recorded. Results indicated that 2 ┬Ámoles of pendimethalin in the hydroponic solution should be effective in identifying plants with high levels of resistance to pendimethalin. Although screening of putative resistant plants is still underway, plants expressing high levels of resistance to pendimethalin have been identified."
This item is an abstract only!
ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Deaton, B., P. Raymer, Z. Chen, and J. Xue. 2022. Obtaining dinitroaniline resistance in tall fescue (Schedonorus arundinaceus). Agron. Abr. p. 143461.
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    Last checked: 01/24/2023
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