Get access

Exogenous Abscisic Acid Application During Grain Filling in Winter Wheat Improves Cold Tolerance of Offspring's Seedlings

Authors

  • X. Li,

    1. National Engineering and Technology Center for Information Agriculture, Key Laboratory of Crop Physiology and Ecology in Southern China, Ministry of Agriculture, Nanjing Agricultural University, Nanjing, China
    2. Department of Plant and Environmental Sciences, Faculty of Science, University of Copenhagen, Taastrup, Denmark
    Search for more papers by this author
  • J. Cai,

    1. National Engineering and Technology Center for Information Agriculture, Key Laboratory of Crop Physiology and Ecology in Southern China, Ministry of Agriculture, Nanjing Agricultural University, Nanjing, China
    Search for more papers by this author
  • F. Liu,

    Corresponding author
    1. Department of Plant and Environmental Sciences, Faculty of Science, University of Copenhagen, Taastrup, Denmark
    • Correspondence

      D. Jiang

      National Engineering and Technology Center for Information Agriculture/Key Laboratory of Crop Physiology and Ecology in Southern China, Ministry of Agriculture, Nanjing Agricultural University, Nanjing 210095, China

      Tel.: +86 25 8439 6575

      Fax: +86 25 8439 6575

      Email: jiangd@njau.edu.cn

      and

      F. Liu

      Department of Plant and Environmental Sciences, Faculty of Science, University of Copenhagen, Højbakkegaard Allé 13, DK-2630 Taastrup, Denmark

      Tel.: +45 3533 3392

      Fax: +45 3533 3478

      Email: fl@life.ku.dk

    Search for more papers by this author
  • T. Dai,

    1. National Engineering and Technology Center for Information Agriculture, Key Laboratory of Crop Physiology and Ecology in Southern China, Ministry of Agriculture, Nanjing Agricultural University, Nanjing, China
    Search for more papers by this author
  • W. Cao,

    1. National Engineering and Technology Center for Information Agriculture, Key Laboratory of Crop Physiology and Ecology in Southern China, Ministry of Agriculture, Nanjing Agricultural University, Nanjing, China
    Search for more papers by this author
  • D. Jiang

    Corresponding author
    1. National Engineering and Technology Center for Information Agriculture, Key Laboratory of Crop Physiology and Ecology in Southern China, Ministry of Agriculture, Nanjing Agricultural University, Nanjing, China
    • Correspondence

      D. Jiang

      National Engineering and Technology Center for Information Agriculture/Key Laboratory of Crop Physiology and Ecology in Southern China, Ministry of Agriculture, Nanjing Agricultural University, Nanjing 210095, China

      Tel.: +86 25 8439 6575

      Fax: +86 25 8439 6575

      Email: jiangd@njau.edu.cn

      and

      F. Liu

      Department of Plant and Environmental Sciences, Faculty of Science, University of Copenhagen, Højbakkegaard Allé 13, DK-2630 Taastrup, Denmark

      Tel.: +45 3533 3392

      Fax: +45 3533 3478

      Email: fl@life.ku.dk

    Search for more papers by this author

Abstract

Low temperature seriously depresses seed germination and seedling growth in winter wheat (Triticum aestivum L.). In this study, wheat plants were sprayed with abscisic acid (ABA) and fluridone (inhibitor of ABA biosynthesis) at 19 days after anthesis (DAA) and repeated at 26 DAA. The seeds of those plants were harvested, and seed germination and offspring's seedling growth under low temperature were evaluated. The results showed that exogenous ABA application decreased seed weight and slightly reduced seed set and seed number per spike. Under low temperature, seeds from ABA-treated plants showed reduced germination rate, germination index, growth of radicle and coleoptile, amylase activity and depressed starch degradation as compared with seeds from non-ABA-treated plants; however, activities of the antioxidant enzymes in both germinating seeds and seedling were enhanced from those exposed to exogenous ABA, resulting in much lowered malondialdehyde (MDA) and H2O2 concentrations and math formula production rate. In addition, the maximum quantum efficiency of photosystem II was also enhanced in ABA-treated offspring's seedlings. It is concluded that exogenous ABA treatment at later grain-filling stage could be an effective approach to improve cold tolerance of the offspring during seed germinating and seedlings establishment in winter wheat.

Ancillary