A homeobox gene, PRESSED FLOWER, regulates lateral axis-dependent development of Arabidopsis flowers.

Abstract:

:It is postulated that the symmetric organization of plant lateral organs is based on two crossed axes, the abaxial-adaxial and the lateral axes. The PRESSED FLOWER (PRS) gene, the expression and function of which are dependent on the lateral axis, is reported in this study. In the prs mutant, growth of the lateral sepals is repressed, and although the size and shape of the abaxial and adaxial sepals are normal, the cell files at the lateral margins are missing. Double-mutant analyses showed that the PRS gene functions independently of the determinations of both floral organ identity and floral meristem size. The PRS gene, encoding a putative transcriptional factor with a homeodomain, was shown to be required for cell proliferation. PRS gene expression is spatially and temporally unique and is expressed in a restricted number of L1 cells at the lateral regions of flower primordia, floral organ primordia, and young leaf primordia. Our study strongly suggests that the PRS gene is involved in the molecular mechanism of lateral axis-dependent development of lateral organs in Arabidopsis.

journal_name

Genes Dev

journal_title

Genes & development

authors

Matsumoto N,Okada K

doi

10.1101/gad.931001

subject

Has Abstract

pub_date

2001-12-15 00:00:00

pages

3355-64

issue

24

eissn

0890-9369

issn

1549-5477

journal_volume

15

pub_type

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