Arabidopsis floral homeotic gene BELL (BEL1) controls ovule development through negative regulation of AGAMOUS gene (AG) - PubMed (original) (raw)
Arabidopsis floral homeotic gene BELL (BEL1) controls ovule development through negative regulation of AGAMOUS gene (AG)
A Ray et al. Proc Natl Acad Sci U S A. 1994.
Abstract
Ovules are the developmental precursors of seeds. In angiosperms the ovules are enclosed within the central floral organs, the carpels. We have identified a homeotic mutation in Arabidopsis, "bell" (bel1), which causes transformation of ovule integuments into carpels. In situ hybridization analysis shows that this mutation leads to increased expression of the carpel-determining homeotic gene AGAMOUS (AG) in the mutant ovules. Introduction of a constitutively expressed AG transgene into wild-type plants causes the ovules to resemble those of bel1 mutants. We propose that the BEL1 gene product directs normal integument development, in part by suppressing AG expression in this structure. Our results allow expansion of the current model of floral organ identity to include regulation of ovule integument identity.
Comment in
- Flower development and evolution: new answers and new questions.
Meyerowitz EM. Meyerowitz EM. Proc Natl Acad Sci U S A. 1994 Jun 21;91(13):5735-7. doi: 10.1073/pnas.91.13.5735. Proc Natl Acad Sci U S A. 1994. PMID: 7912433 Free PMC article. Review. No abstract available.
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