The BELL1 gene encodes a homeodomain protein involved in pattern formation in the Arabidopsis ovule primordium.

Abstract:

:Ovule development in Arabidopsis involves the formation of three morphologically defined proximal-distal pattern elements. Integuments arise from the central pattern element. Analysis of Bell 1 (Bel 1) mutant ovules indicated that BEL1 was required for integument development. Cloning of the BEL1 locus reveals that it encodes a homeodomain transcription factor. Prior to integument initiation, BEL1 RNA localizes to the central domain, providing molecular evidence for a central pattern element. Therefore, proximal-distal patterning of the ovule involves the regulated expression of the BEL1 gene that controls integument morphogenesis. A model for BEL1 function is evaluated with regard to new data showing the expression pattern of the floral homeotic gene AGAMOUS (AG) early in wild-type and BEL1 ovule development.

journal_name

Cell

journal_title

Cell

authors

Reiser L,Modrusan Z,Margossian L,Samach A,Ohad N,Haughn GW,Fischer RL

doi

10.1016/0092-8674(95)90186-8

subject

Has Abstract

pub_date

1995-12-01 00:00:00

pages

735-42

issue

5

eissn

0092-8674

issn

1097-4172

pii

0092-8674(95)90186-8

journal_volume

83

pub_type

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