Mutations causing defects in the biosynthesis and response to gibberellins, abscisic acid and phytochrome B do not inhibit vernalization in Arabidopsis fca-1 (original) (raw)

Abstract.

The roles of gibberellins, abscisic acid and phytochrome B in the vernalization response were investigated by combining mutations causing defects in their biosynthesis and response with the Arabidopsis thaliana (L.) Heynh. fca-1 mutation. The fca-1 mutation confers a very late-flowering phenotype which can be reversed to wild-type flowering if the seedlings are vernalized. Vernalization was unaffected in ga1-3, gai, abi1-1, abi2-1, abi3-1 and phyB-1 backgrounds, suggesting that gibberellin action mediated via GA1 and GAI, abscisic acid action mediated through ABI1 and ABI2, and phytochrome B, function independently of vernalization. However, the mutations did interact with fca-1 to change flowering time in the absence of vernalization. The abi1 fca-1 and abi2 fca-1 double mutants flowered earlier than fca-1 implying a role for abscisic acid in floral repression. Combination of _ga1_-3 or gai with fca-1 unexpectedly resulted in opposite interactions, with gai partially suppressing the late flowering of fca-1.

Access this article

Log in via an institution

Subscribe and save

Buy Now

Price excludes VAT (USA)
Tax calculation will be finalised during checkout.

Instant access to the full article PDF.

Similar content being viewed by others

Author information

Authors and Affiliations

  1. Department of Molecular Genetics, John Innes Centre, Colney Lane, Norwich NR4 7UH, UK, , , , , , GB
    John Chandler & Caroline Dean
  2. Departamento de Genetica Molecular de Plantas, CNB-CSIC, Universidad Autonoma de Madrid, Cantoblanco, 28049 Madrid, Spain, , , , , , ES
    Jose M. Martinez-Zapater

Authors

  1. John Chandler
    You can also search for this author inPubMed Google Scholar
  2. Jose M. Martinez-Zapater
    You can also search for this author inPubMed Google Scholar
  3. Caroline Dean
    You can also search for this author inPubMed Google Scholar

Additional information

Received: 17 July 1999 / Accepted: 11 October 1999

Rights and permissions

About this article

Cite this article

Chandler, J., Martinez-Zapater, J. & Dean, C. Mutations causing defects in the biosynthesis and response to gibberellins, abscisic acid and phytochrome B do not inhibit vernalization in Arabidopsis fca-1.Planta 210, 677–682 (2000). https://doi.org/10.1007/s004250050059

Download citation