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Association of dwarfism and floral induction with a grape ‘green revolution’ mutation

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Listed:
  • Paul K. Boss

    (Norwich Research Park)

  • Mark R. Thomas

    (CSIRO Plant Industry and Cooperative Research Centre for Viticulture)

Abstract

The transition from vegetative to reproductive growth is an essential process in the life cycle of plants. Plant floral induction pathways respond to both environmental and endogenous cues and much has been learnt about these genetic pathways by studying mutants of Arabidopsis1,2. Gibberellins (GAs) are plant growth regulators important in many aspects of plant growth and in Arabidopsis they promote flowering3,4,5. Here we provide genetic evidence that GAs inhibit flowering in grapevine. A grapevine dwarf mutant derived from the L1 cell layer of the champagne cultivar Pinot Meunier produces inflorescences along the length of the shoot where tendrils are normally formed. The mutated gene associated with the phenotype is a homologue of the wheat ‘green revolution’ gene Reduced height-1 (ref. 6) and the Arabidopsis gene GA insensitive (GAI)7. The conversion of tendrils to inflorescences in the mutant demonstrates that the grapevine tendril is a modified inflorescence inhibited from completing floral development by GAs.

Suggested Citation

  • Paul K. Boss & Mark R. Thomas, 2002. "Association of dwarfism and floral induction with a grape ‘green revolution’ mutation," Nature, Nature, vol. 416(6883), pages 847-850, April.
    • Handle: RePEc:nat:nature:v:416:y:2002:i:6883:d:10.1038_416847a
    DOI: 10.1038/416847a
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