English
 
User Manual Privacy Policy Disclaimer Contact us
  Advanced SearchBrowse

Item

ITEM ACTIONSEXPORT
  A novel MADS-box gene subfamily with a sister-group relationship to class B floral homeotic genes

Becker, A., Kaufmann, K., Freialdenhoven, A., Vincent, C., Li, M. A., Saedler, H., et al. (2002). A novel MADS-box gene subfamily with a sister-group relationship to class B floral homeotic genes. Molecular Genetics and Genomics, 266(6), 942-950.

Item is

Basic

show hide
Item Permalink: http://hdl.handle.net/11858/00-001M-0000-0012-3E16-A Version Permalink: http://hdl.handle.net/11858/00-001M-0000-0012-3E17-8
Genre: Journal Article

Files

show Files

Locators

show

Creators

show
hide
 Creators:
Becker, A.1, Author              
Kaufmann, K., Author
Freialdenhoven, A.2, Author              
Vincent, C.3, Author              
Li, M. A.1, Author              
Saedler, H.1, Author              
Theissen, G.1, Author              
Affiliations:
1Dept. of Molecular Plant Genetics (Heinz Saedler), MPI for Plant Breeding Research, Max Planck Society, ou_1113568              
2Dept. of Plant Microbe Interactions (Paul Schulze-Lefert), MPI for Plant Breeding Research, Max Planck Society, ou_1113572              
3Dept. of Plant Developmental Biology (George Coupland), MPI for Plant Breeding Research, Max Planck Society, ou_1113571              

Content

show
hide
Free keywords: MADS-box gene; evolution; development; flower; homeotic gene
 Abstract: Class B floral homeotic genes specify the identity of petals and stamens during the development of angiosperm flowers. Recently, putative orthologs of these genes have been identified in different gymnosperms. Together, these genes constitute a clade, termed B genes. Here we report that diverse seed plants also contain members of a hitherto unknown sister clade of the B genes, termed B-sister (B-s)genes. We have isolated members of the B, clade from the gymnosperm Gnetum gnemon, the monocotyledonous angiosperm Zea mays and the eudicots Arabidopsis thaliana and Antirrhinum)l majus. In addition, MADS-box genes from the basal angiosperm Asarian europaeum and the eudicot Petunia hybrida were identified as B- s genes. Comprehensive expression studies revealed that Bs genes are mainly transcribed in female reproductive organs (ovules and carpel walls). This is in clear contrast to the B genes, which are predominantly expressed in male reproductive organs (and in angiosperm petals). Our data suggest that the B, genes played an important role during the evolution of the reproductive structures in seed plants. The establishment of distinct B and B, gene lineages after duplication of an ancestral gene may have accompanied the evolution of male microsporophylls and female megasporophylls 400-300 million years ago. During flower evolution, expression of B, genes diversified, but the focus of expression remained in female reproductive organs. Our findings imply that a clade of highly conserved close relatives of class B floral homeotic genes has been completely overlooked until recently and awaits further evaluation of its developmental and evolutionary importance. Electronic supplementary material to this paper can be obtained by using the Springer Link server located at http://dx.doi.org/10.1007/s00438-001-0615-8.

Details

show
hide
Language(s): eng - English
 Dates: 2002-02
 Publication Status: Published in print
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Method: Peer
 Identifiers: eDoc: 28817
ISI: 000174621700005
 Degree: -

Event

show

Legal Case

show

Project information

show

Source 1

show
hide
Title: Molecular Genetics and Genomics
  Alternative Title : Mol. Genet. Genomics
Source Genre: Journal
 Creator(s):
Affiliations:
Publ. Info: -
Pages: - Volume / Issue: 266 (6) Sequence Number: - Start / End Page: 942 - 950 Identifier: ISSN: 1617-4615