Effects of drought-stress on seed germination and growth physiology of quinclorac-resistant Echinochloa crusgalli.

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  • Author(s): Wu LM;Wu LM;Wu LM; Fang Y; Fang Y; Yang HN; Yang HN; Bai LY; Bai LY; Bai LY
  • Source:
    PloS one [PLoS One] 2019 Apr 04; Vol. 14 (4), pp. e0214480. Date of Electronic Publication: 2019 Apr 04 (Print Publication: 2019).
  • Publication Type:
    Journal Article; Research Support, Non-U.S. Gov't
  • Language:
    English
  • Additional Information
    • Source:
      Publisher: Public Library of Science Country of Publication: United States NLM ID: 101285081 Publication Model: eCollection Cited Medium: Internet ISSN: 1932-6203 (Electronic) Linking ISSN: 19326203 NLM ISO Abbreviation: PLoS One Subsets: MEDLINE
    • Publication Information:
      Original Publication: San Francisco, CA : Public Library of Science
    • Subject Terms:
      Droughts* ; Herbicide Resistance*; Echinochloa/*drug effects ; Germination/*drug effects ; Quinolines/*pharmacology ; Seeds/*drug effects; China ; Echinochloa/enzymology ; Gene Expression Regulation, Plant/drug effects ; Glutathione Transferase/metabolism ; Herbicides/pharmacology ; Lyases/metabolism ; Oryza/metabolism ; Plant Proteins/metabolism ; Plant Roots/metabolism ; Plant Weeds/drug effects ; Plant Weeds/enzymology ; Polyethylene Glycols ; Stress, Physiological
    • Abstract:
      Echinochloa crusgalli (L.) Beauv. (barnyard grass) is considered a noxious weed worldwide, and is the most pernicious weed decreasing rice yields in China. Recently, E. crusgalli has evolved quinclorac resistance, making it among the most serious herbicide resistant weeds in China. The present study explored differences in germination and growth between quinclorac-resistant and -susceptible E. crusgalli collected in Hunan Province. The order of the seven E. crusgalli biotypes assessed, from high to low quinclorac-resistance, was: quinclorac-resistant, Chunhua, Hanshou, Shimen, Hekou, Dingcheng, and quinclorac-susceptible. With an increased in the level of quinclorac-resistance, the germination rate, length of young shoots and roots, and fresh weight of E. crusgalli were all decreased compared with that in more susceptible biotypes. However, there were no significant differences between quinclorac-resistant and susceptible E. crusgalli biotypes without polyethylene glycol 6000 treatment. Drought had a more obvious effect on glutathione S-transferases (GST) activity, determined by spectrophotometric method, in quinclorac-resistant E. crusgalli. Higher resistance level biotypes showed greater activity, and when treated with polyethylene glycol 6000 for 3 days, all E. crusgalli biotypes showed the highest GST activity. This study demonstrated that as the level of quinclorac-resistance increased, the rate of seed germination decreased, while the growth of young buds, young roots, and fresh weight decreased. Increased quinclorac-resistance may be related to the increased metabolic activity of GST in E. crusgalli.
      Competing Interests: The authors have declared that no competing interests exist.
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    • Accession Number:
      0 (Herbicides)
      0 (Plant Proteins)
      0 (Quinolines)
      3J06V625EE (quinclorac)
      3WJQ0SDW1A (Polyethylene Glycols)
      EC 2.5.1.18 (Glutathione Transferase)
      EC 4.- (Lyases)
    • Publication Date:
      Date Created: 20190405 Date Completed: 20191223 Latest Revision: 20200309
    • Publication Date:
      20221213
    • Accession Number:
      PMC6448836
    • Accession Number:
      10.1371/journal.pone.0214480
    • Accession Number:
      30947307