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PLENA and FARINELLI: redundancy and regulatory interactions between two Antirrhinum MADS‐box factors controlling flower development

PLENA and FARINELLI: redundancy and regulatory interactions between two Antirrhinum MADS‐box... We report the discovery of an Antirrhinum MADS‐box gene, FARINELLI (FAR), and the isolation of far mutants by a reverse genetic screen. Despite striking similarities between FAR and the class C MADS‐box gene PLENA (PLE), the phenotypes of their respective mutants are dramatically different. Unlike ple mutants, which show homeotic conversion of reproductive organs to perianth organs and a loss of floral determinacy, far mutants have normal flowers which are partially male‐sterile. Expression studies of PLE and FAR, in wild‐type and mutant backgrounds, show complex interactions between the two genes. Double mutant analysis reveals an unexpected, redundant negative control over the B‐function MADS‐box genes. This feature of the two Antirrhinum C‐function‐like genes is markedly different from the control of the inner boundary of the B‐function expression domain in Arabidopsis, and we propose and discuss a model to account for these differences. The difference in phenotypes of mutants in two highly related genes illustrates the importance of the position within the regulatory network in determining gene function. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png The EMBO Journal Wiley

PLENA and FARINELLI: redundancy and regulatory interactions between two Antirrhinum MADS‐box factors controlling flower development

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References (46)

Publisher
Wiley
Copyright
Copyright © 2013 Wiley Periodicals, Inc
ISSN
0261-4189
eISSN
1460-2075
DOI
10.1093/emboj/18.14.4023
pmid
10406807
Publisher site
See Article on Publisher Site

Abstract

We report the discovery of an Antirrhinum MADS‐box gene, FARINELLI (FAR), and the isolation of far mutants by a reverse genetic screen. Despite striking similarities between FAR and the class C MADS‐box gene PLENA (PLE), the phenotypes of their respective mutants are dramatically different. Unlike ple mutants, which show homeotic conversion of reproductive organs to perianth organs and a loss of floral determinacy, far mutants have normal flowers which are partially male‐sterile. Expression studies of PLE and FAR, in wild‐type and mutant backgrounds, show complex interactions between the two genes. Double mutant analysis reveals an unexpected, redundant negative control over the B‐function MADS‐box genes. This feature of the two Antirrhinum C‐function‐like genes is markedly different from the control of the inner boundary of the B‐function expression domain in Arabidopsis, and we propose and discuss a model to account for these differences. The difference in phenotypes of mutants in two highly related genes illustrates the importance of the position within the regulatory network in determining gene function.

Journal

The EMBO JournalWiley

Published: Mar 15, 2000

Keywords: ; ; ; ;

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