Plant Molecular Biology

, Volume 65, Issue 3, pp 219–232

DORNRÖSCHEN-LIKE, an AP2 gene, is necessary for stamen emergence in Arabidopsis

Article

DOI: 10.1007/s11103-007-9210-7

Cite this article as:
Nag, A., Yang, Y. & Jack, T. Plant Mol Biol (2007) 65: 219. doi:10.1007/s11103-007-9210-7

Abstract

To identify novel genes in petal and stamen development, a genetic screen was carried out for enhancers of the unusual B class mutant pistillata-5 (pi-5). In pi-5 flowers, second whorl organs develop as sepals rather than petals, but third whorl stamens are normal. One pi-5 enhancer, dornröschen-like-2 (drnl-2), results in third whorl positions developing as filamentous organs. In addition to enhancing the pi-5 phenotype, drnl-2 mutants also exhibit a phenotype in a wild-type PI background. Although stamen primordia are morphologically visible during early stages of flower development, they fail to enlarge in drnl-2 mutants. DRNL, which encodes a single AP2 domain protein, is expressed in a dynamic pattern in the embryo, seedling, and flower. Analysis of both the drnl-2 mutant phenotype and the DRNL expression pattern in flowers suggests that DRNL plays a critical role in stamen emergence in Arabidopsis.

Keywords

Anther AP2/ERF transcription factor Arabidopsis Flower development Stamen PISTILLATA 

Abbreviations

IAA

Indole-3-acetic acid

EMS

Ethylmethanesulfonate

kb

Kilobase

ARE

Auxin response elements

ARF

Auxin response factor

SAM

Shoot apical meristem

X-gluc

5-bromo-4chloro-3indolyl-beta-O-glucuronic acid

SEM

Scanning electron microscope

Supplementary material

Copyright information

© Springer Science+Business Media B.V. 2007

Authors and Affiliations

  1. 1.Department of Biological SciencesDartmouth CollegeHanoverUSA
  2. 2.Section of Cell and Developmental BiologyUniversity of California at San DiegoLa JollaUSA