The modified ABC model explains the development of the petaloid perianth of Agapanthus praecox ssp. orientalis (Agapanthaceae) flowers

Toru Nakamura, Tatsuya Fukuda, Masaru Nakano, Mitsuyasu Hasebe, Toshiaki Kameya, Akira Kanno

Research output: Contribution to journalArticlepeer-review

59 Citations (Scopus)

Abstract

The class B genes, which belong to the MADS-box gene family, play important roles in regulating the development of petals and stamens in flowering plants. To understand the molecular mechanisms of floral development in Agapanthus praecox ssp. orientalis (Agapanthaceae), we isolated and characterized the homologs of the Antirrhinum majus genes GLOBOSA and DEFICIENS in this plant. These were designated as ApGLO and ApDEF, respectively. ApGLO and ApDEF contain open reading frames that encode deduced protein with 210 and 214 amino acid residues, respectively. Phylogenetic analysis indicated that ApGLO and ApDEF belong to the monocot class B gene family. In situ hybridization experiments revealed that hybridization signals of ApGLO and ApDEF were observed in whorl 1 as well as in whorls 2 and 3. Moreover, the flowers of transgenic Arabidopsis plants that ectopically expressed ApGLO formed petal-like organs in whorl 1. These observations indicate that the flower developmental mechanism of Agapanthus follows the modified ABC model.

Original languageEnglish
Pages (from-to)435-445
Number of pages11
JournalPlant Molecular Biology
Volume58
Issue number3
DOIs
Publication statusPublished - 2005 Jun

Keywords

  • Agapanthus praecox
  • Class B gene
  • Flower development
  • MADS-box gene
  • Modified ABC model

ASJC Scopus subject areas

  • Agronomy and Crop Science
  • Genetics
  • Plant Science

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