AINTEGUMENTA Contributes to Organ Polarity and Regulates Growth of Lateral Organs in Combination with YABBY Genes
- 19 May 2006
- journal article
- Published by Oxford University Press (OUP) in Plant Physiology
- Vol. 141 (3), 977-987
- https://doi.org/10.1104/pp.106.076604
Abstract
Lateral organs in flowering plants display polarity along their adaxial-abaxial axis with distinct cell types forming at different positions along this axis. Members of three classes of transcription factors in Arabidopsis (Arabidopsis thaliana; the Class III homeodomain/leucine zipper [HD-ZIP] proteins, KANADI proteins, and YABBY proteins) are expressed in either the adaxial or abaxial domain of organ primordia where they confer these respective identities. Little is known about the factors that act upstream of these polarity-determining genes to regulate their expression. We have investigated the relationship between AINTEGUMENTA (ANT), a gene that promotes initiation and growth of lateral organ primordia, and polarity genes. Although ant single mutants do not display any obvious defects in organ polarity, loss of ANT activity in combination with mutations in one or more YABBY genes results in polarity defects greater than those observed in the yabby mutants alone. Our results suggest that ANT acts in combination with the YABBY gene FILAMENTOUS FLOWER (FIL) to promote organ polarity by up-regulating the expression of the adaxial-specifying HD-ZIP gene PHABULOSA. Furthermore, we show that ANT acts with FIL to up-regulate expression of the floral homeotic gene APETALA3. Our work defines new roles for ANT in the development of lateral organs.Keywords
This publication has 37 references indexed in Scilit:
- Molecular and genetic interactions betweenSTYLOSAandGRAMINIFOLIAin the control ofAntirrhinumvegetative and reproductive developmentDevelopment, 2004
- Promoter Bashing, microRNAs, and Knox Genes. New Insights, Regulators, and Targets-of-Regulation in the Establishment of Lateral Organ Polarity in ArabidopsisPlant Physiology, 2004
- Non-sequence-specific DNA Binding by the FILAMENTOUS FLOWER Protein from Arabidopsis thaliana Is Reduced by EDTAPublished by Elsevier BV ,2002
- Regulation of Gynoecium Marginal Tissue Formation by LEUNIG and AINTEGUMENTAPlant Cell, 2000
- Ectopic expression ofAINTEGUMENTA inArabidopsis plants results in increased growth of floral organsDevelopmental Genetics, 1999
- Molecular cloning of ABNORMAL FLORAL ORGANS : a gene required for flower development in ArabidopsisSexual Plant Reproduction, 1999
- The AINTEGUMENTA gene of Arabidopsis required for ovule and female gametophyte development is related to the floral homeotic gene APETALA2.Plant Cell, 1996
- AINTEGUMENTA, an APETALA2-like gene of Arabidopsis with pleiotropic roles in ovule development and floral organ growth.Plant Cell, 1996
- Alkali treatment for rapid preparation of plant material for reliable PCR analysisThe Plant Journal, 1993
- The homeotic gene APETALA3 of Arabidopsis thaliana encodes a MADS box and is expressed in petals and stamensCell, 1992