Methionine-induced regulation of growth, secondary metabolites and oxidative defense system in sunflower (Helianthus annuus L.) plants subjected to water deficit stress.

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  • 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:
      Helianthus/*growth & development ; Methionine/*pharmacology ; Oxidative Stress/*drug effects ; Secondary Metabolism/*drug effects; Ascorbic Acid/metabolism ; Betaine/metabolism ; Chlorophyll A/metabolism ; Dehydration ; Gene Expression Regulation, Plant/drug effects ; Helianthus/drug effects ; Helianthus/metabolism ; Hydrogen Peroxide/metabolism ; Malondialdehyde ; Peroxidase/metabolism ; Plant Shoots/drug effects ; Plant Shoots/growth & development ; Plant Shoots/metabolism
    • Abstract:
      Optimum water availability at different growth stages is one the major prerequisites of best growth and yield production of plants. Exogenous application of plant growth regulators considered effective for normal functioning of plants under water-deficit conditions. A study was conducted to examine the influence of exogenously applied L-methionine on sunflower (Helianthus annuus L.) plants grown under water-deficit conditions. Twenty-five-day old seedlings of four sunflower cultivars, FH331, FH572, FH652 and FH623 were exposed to control (100% F.C.) and drought stress (60% F.C.) conditions. After 30-day of drought stress, L-methionine (Met; 20 mg/L) was applied as a foliar spray to control and drought stressed plants. Water deficit stress significantly reduced shoot fresh and dry weights shoot and root lengths, and chlorophyll a content in all four cultivars. While a significant increase was observed due to water deficiency in relative membrane permeability (RMP), malondialdehyde (MDA), total soluble proteins (TSP), total soluble sugars (TSS), ascorbic acid (AsA) and activity of peroxidase (POD). Although, exogenously applied Met was effective in decreasing RMP, MDA and H2O2 contents, it increased the shoot fresh weight, shoot length, chlorophyll a, chlorophyll a/b ratio, proline contents and the activities of SOD, POD and CAT enzymes in all four cultivars under water deficit stress. No change in AsA and total phenolics was observed due to foliar-applied Met under water stress conditions. Of all sunflower cultivars, cv. FH-572 was the highest and cv. FH-652 the lowest of all four cultivars in shoot fresh and dry weights as well as shoot length under drought stress conditions. Overall, foliar applied L-methionine was effective in improving the drought stress tolerance of sunflower plants that was found to be positively associated with Met induced improved growth attributes and reduced RMP, MDA and H2O2 contents under water deficit conditions.
      Competing Interests: he authors have declared that no competing interests exist.
    • Comments:
      Retraction in: PLoS One. 2022 Sep 30;17(9):e0274851. doi: 10.1371/journal.pone.0274851. (PMID: 36178883)
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    • Accession Number:
      3SCV180C9W (Betaine)
      4Y8F71G49Q (Malondialdehyde)
      AE28F7PNPL (Methionine)
      BBX060AN9V (Hydrogen Peroxide)
      EC 1.11.1.7 (Peroxidase)
      PQ6CK8PD0R (Ascorbic Acid)
      YF5Q9EJC8Y (Chlorophyll A)
    • Publication Date:
      Date Created: 20211209 Date Completed: 20220110 Latest Revision: 20240819
    • Publication Date:
      20240819
    • Accession Number:
      PMC8659686
    • Accession Number:
      10.1371/journal.pone.0259585
    • Accession Number:
      34882694