• We are sorry, but NCBI web applications do not support your browser and may not function properly. More information
Logo of geneticsGeneticsCurrent IssueInformation for AuthorsEditorial BoardSubscribeSubmit a Manuscript
Genetics. Sep 1998; 150(1): 403–410.
PMCID: PMC1460307

Flowering-time genes modulate the response to LEAFY activity.

Abstract

Among the genes that control the transition to flowering in Arabidopsis is a large group whose inactivation causes a delay in flowering. It has been difficult to establish different pathways in which the flowering-time genes might act, because mutants with lesions in these genes have very similar phenotypes. Among the putative targets of the flowering-time genes is another group of genes, which control the identity of individual meristems. Overexpression of one of the meristem-identity genes, LEAFY, can cause the precocious generation of flowers and thus early flowering. We have exploited the opposite phenotypes seen in late-flowering mutants and LEAFY overexpressers to clarify the genetic interactions between flowering-time genes and LEAFY. According to epistatic relationships, we can define one class of flowering-time genes that affects primarily the response to LEAFY activity, and another class of genes that affects primarily the transcriptional induction of LEAFY. These observations allow us to expand previously proposed models for the genetic control of flowering time.

Full Text

The Full Text of this article is available as a PDF (127K).

Selected References

These references are in PubMed. This may not be the complete list of references from this article.
  • Blázquez MA, Soowal LN, Lee I, Weigel D. LEAFY expression and flower initiation in Arabidopsis. Development. 1997 Oct;124(19):3835–3844. [PubMed]
  • Blazquez MA, Green R, Nilsson O, Sussman MR, Weigel D. Gibberellins promote flowering of arabidopsis by activating the LEAFY promoter . Plant Cell. 1998 May;10(5):791–800. [PMC free article] [PubMed]
  • Carpenter R, Copsey L, Vincent C, Doyle S, Magrath R, Coen E. Control of flower development and phyllotaxy by meristem identity genes in antirrhinum. Plant Cell. 1995 Dec;7(12):2001–2011. [PMC free article] [PubMed]
  • Hempel FD, Feldman LJ. Specification of chimeric flowering shoots in wild-type Arabidopsis. Plant J. 1995 Nov;8(5):725–731. [PubMed]
  • Hempel FD, Weigel D, Mandel MA, Ditta G, Zambryski PC, Feldman LJ, Yanofsky MF. Floral determination and expression of floral regulatory genes in Arabidopsis. Development. 1997 Oct;124(19):3845–3853. [PubMed]
  • Jack T, Fox GL, Meyerowitz EM. Arabidopsis homeotic gene APETALA3 ectopic expression: transcriptional and posttranscriptional regulation determine floral organ identity. Cell. 1994 Feb 25;76(4):703–716. [PubMed]
  • Poethig RS. Phase change and the regulation of shoot morphogenesis in plants. Science. 1990 Nov 16;250(4983):923–930. [PubMed]
  • Koornneef M, Hanhart CJ, van der Veen JH. A genetic and physiological analysis of late flowering mutants in Arabidopsis thaliana. Mol Gen Genet. 1991 Sep;229(1):57–66. [PubMed]
  • Koornneef M, Alonso-Blanco C, Blankestijn-de Vries H, Hanhart CJ, Peeters AJ. Genetic interactions among late-flowering mutants of Arabidopsis. Genetics. 1998 Feb;148(2):885–892. [PMC free article] [PubMed]
  • Krizek BA, Meyerowitz EM. The Arabidopsis homeotic genes APETALA3 and PISTILLATA are sufficient to provide the B class organ identity function. Development. 1996 Jan;122(1):11–22. [PubMed]
  • Ruiz-García L, Madueño F, Wilkinson M, Haughn G, Salinas J, Martínez-Zapater JM. Different roles of flowering-time genes in the activation of floral initiation genes in Arabidopsis. Plant Cell. 1997 Nov;9(11):1921–1934. [PMC free article] [PubMed]
  • Lee I, Bleecker A, Amasino R. Analysis of naturally occurring late flowering in Arabidopsis thaliana. Mol Gen Genet. 1993 Feb;237(1-2):171–176. [PubMed]
  • Shannon S, Meeks-Wagner DR. A Mutation in the Arabidopsis TFL1 Gene Affects Inflorescence Meristem Development. Plant Cell. 1991 Sep;3(9):877–892. [PMC free article] [PubMed]
  • Simon R, Igeño MI, Coupland G. Activation of floral meristem identity genes in Arabidopsis. Nature. 1996 Nov 7;384(6604):59–62. [PubMed]
  • Mandel MA, Yanofsky MF. A gene triggering flower formation in Arabidopsis. Nature. 1995 Oct 12;377(6549):522–524. [PubMed]
  • Smyth DR, Bowman JL, Meyerowitz EM. Early flower development in Arabidopsis. Plant Cell. 1990 Aug;2(8):755–767. [PMC free article] [PubMed]
  • Telfer A, Bollman KM, Poethig RS. Phase change and the regulation of trichome distribution in Arabidopsis thaliana. Development. 1997 Feb;124(3):645–654. [PubMed]
  • Weigel D, Nilsson O. A developmental switch sufficient for flower initiation in diverse plants. Nature. 1995 Oct 12;377(6549):495–500. [PubMed]
  • Nilsson O, Weigel D. Modulating the timing of flowering. Curr Opin Biotechnol. 1997 Apr 1;8(2):195–199. [PubMed]

Articles from Genetics are provided here courtesy of Genetics Society of America

Formats:

Related citations in PubMed

See reviews...See all...

Cited by other articles in PMC

See all...

Links

Recent Activity

Your browsing activity is empty.

Activity recording is turned off.

Turn recording back on

See more...