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Evidence that auxin is required for normal seed size and starch synthesis in pea

journal contribution
posted on 2023-05-19, 11:15 authored by Erin McAdam, Meitzel, T, Quittenden, LJ, Davidson, SE, Dalmais, M, Bendahmane, AI, Thompson, R, Jennifer SmithJennifer Smith, David NicholsDavid Nichols, Shelley UrquhartShelley Urquhart, Ariane Gelinas-MarionAriane Gelinas-Marion, Aubert, G, John RossJohn Ross
  • In recent years the biosynthesis of auxin has been clarified with the aid of mutations in auxin biosynthesis genes. However, we know little about the effects of these mutations on the seed-filling stage of seed development.
  • Here we investigate a key auxin biosynthesis mutation of the garden pea, which results in auxin deficiency in developing seeds. We exploit the large seed size of this model species, which facilitates the measurement of compounds in individual seeds.
  • The mutation results in small seeds with reduced starch content and a wrinkled phenotype at the dry stage. The phenotypic effects of the mutation were fully reversed by introduction of the wild-type gene as a transgene, and partially reversed by auxin application.
  • The results indicate that auxin is required for normal seed size and starch accumulation in pea, an important grain legume crop.

    • History

    Publication title

    New Phytologist

    Volume

    216

    Pagination

    193-204

    ISSN

    0028-646X

    Department/School

    School of Natural Sciences

    Publisher

    Blackwell Publishing Ltd

    Place of publication

    9600 Garsington Rd, Oxford, England, Oxon, Ox4 2Dg

    Rights statement

    Copyright 2017 The Authors

    Repository Status

    • Restricted

    Socio-economic Objectives

    Field grown vegetable crops

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      University Of Tasmania

      Categories

      Keywords

      auxinchlorinated auxinmutantsPisum sativum (pea)seed developmentstarch

      Licence

      In Copyright

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