GA(4/7) promotes stem growth and flowering in a genetic line of aquilegia χ hybrida Sims

T. J. Gianfagna, R. H. Merritt

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2 Scopus citations


'Rose-White' is a unique genetic line of Aquilegia χ hybrida Sims that will flower without a cold period, does not have an extended juvenile growth phase, and is responsive to gibberellin treatment. Plants treated at the 7-leaf stage with GA(4/7) bolted and flowered 20 days earlier than untreated plants. Gibberellin treatment did not increase the growth rate (leaves/day), but induced flowering after the production of fewer leaves. Plant height and the number of flowers per plant increased significantly. GA(4/7) treatment delayed flower senescence and abscission. Flower longevity was extended 3-fold when compared to untreated plants. Treatment response was more pronounced at lower temperatures (19 °C day/12 °C night) than at higher growing temperatures (24 °C day/19 °C night). GA3 was much less effective than GA(4/7) in promoting flowering, and there was no response to benzyladenine.

Original languageEnglish (US)
Pages (from-to)1-5
Number of pages5
JournalPlant Growth Regulation
Issue number1
StatePublished - 1998

All Science Journal Classification (ASJC) codes

  • Physiology
  • Agronomy and Crop Science
  • Plant Science


  • Flowering
  • Gibberellin
  • Herbaceous perennials


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