PMID: 9193074May 1, 1997Paper

Pollen-specific expression of DEFH125, a MADS-box transcription factor in Antirrhinum with unusual features

The Plant Journal : for Cell and Molecular Biology
S ZachgoZ Schwarz-Sommer

Abstract

MADS-box genes encode transcription factors that regulate different processes of early and late floral development. A novel type of MADS-box gene, DEFH125, was isolated from a stamen specific cDNA library from Antirrhinum majus. The DEFH125 protein shows extensive similarity over the entire length to AGL17, a root-specific MADS-box protein of Arabidopsis. By sharing amino acid deviations from the consensus MADS-box sequence not found in other MADS-box families, these two proteins constitute a novel MADS-box subfamily. However, in contrast to members of other subfamilies the overall structural similarity between the DEFH125 and AGL17 proteins does not coincide with a similarity of expression patterns and functions. The DEFH125 gene is expressed at detectable levels only in the third whorl when the meiotic division of the pollen mother cell is already accomplished. The DEFH125 protein has been located in the cytoplasm of the vegetative cell within the maturing pollen. Surprisingly, after pollination, the DEFH125 protein is also found in nuclei of cells within the transmitting tract of the carpel. The intriguing role of DEFH125, the first MADS-box transcription factor of this type, in aspects of fertilization, such as pollen matur...Continue Reading

Citations

Jul 9, 2002·Molecular Phylogenetics and Evolution·Bo JohansenSigne Frederiksen
Nov 15, 2003·Molecular Phylogenetics and Evolution·Annette Becker, Günter Theissen
Nov 28, 2001·The Plant Journal : for Cell and Molecular Biology·B M MüllerS Zachgo
Mar 24, 2004·The Plant Cell·Sheila McCormick
Mar 7, 2009·BMC Plant Biology·Farzad HaerizadehMohan B Singh
Feb 9, 2005·Proceedings of the National Academy of Sciences of the United States of America·Yoichi TanabeMotomi Ito
Jan 16, 2009·Plant, Cell & Environment·Brian G Forde, Pia Walch-Liu
Jan 1, 2009·American Journal of Botany·Lena C Hileman, Vivian F Irish
Aug 24, 2006·Molecular Biology and Evolution·Lena C HilemanVivian F Irish
Feb 8, 2011·The Plant Cell·Lifang HuDabing Zhang
Mar 20, 2003·Plant Physiology·Krzysztof Szczyglowski, Lisa Amyot

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