LAX PANICLE2of Rice Encodes a Novel Nuclear Protein and Regulates the Formation of Axillary Meristems
- 1 September 2011
- journal article
- Published by Oxford University Press (OUP) in THE PLANT CELL ONLINE
- Vol. 23 (9), 3276-3287
- https://doi.org/10.1105/tpc.111.088765
Abstract
Aerial architecture in higher plants is dependent on the activity of the shoot apical meristem (SAM) and axillary meristems (AMs). The SAM produces a main shoot and leaf primordia, while AMs are generated at the axils of leaf primordia and give rise to branches and flowers. Therefore, the formation of AMs is a critical step in the construction of plant architecture. Here, we characterized the rice (Oryza sativa) lax panicle2 (lax2) mutant, which has altered AM formation. LAX2 regulates the branching of the aboveground parts of a rice plant throughout plant development, except for the primary branch in the panicle. The lax2 mutant is similar to lax panicle1 (lax1) in that it lacks an AM in most of the lateral branching of the panicle and has a reduced number of AMs at the vegetative stage. The lax1 lax2 double mutant synergistically enhances the reduced-branching phenotype, indicating the presence of multiple pathways for branching. LAX2 encodes a nuclear protein that contains a plant-specific conserved domain and physically interacts with LAX1. We propose that LAX2 is a novel factor that acts together with LAX1 in rice to regulate the process of AM formation.Keywords
This publication has 39 references indexed in Scilit:
- ERECT PANICLE2 Encodes a Novel Protein That Regulates Panicle Erectness in Indica RiceGenetics, 2010
- Two-Step Regulation ofLAX PANICLE1Protein Accumulation in Axillary Meristem Formation in RiceTHE PLANT CELL ONLINE, 2009
- Hormonal Regulation of Branching in GrassesPlant Physiology, 2009
- ArabidopsisDREB2A-Interacting Proteins Function as RING E3 Ligases and Negatively Regulate Plant Drought Stress–Responsive Gene ExpressionTHE PLANT CELL ONLINE, 2008
- barren inflorescence2Encodes a Co-Ortholog of thePINOIDSerine/Threonine Kinase and Is Required for Organogenesis during Inflorescence and Vegetative Development in MaizePlant Physiology, 2007
- Arabidopsis CUP-SHAPED COTYLEDON3Regulates Postembryonic Shoot Meristem and Organ Boundary FormationTHE PLANT CELL ONLINE, 2006
- The negative regulator of plant cold responses, HOS1, is a RING E3 ligase that mediates the ubiquitination and degradation of ICE1Proceedings of the National Academy of Sciences of the United States of America, 2006
- SHOOT BRANCHINGAnnual Review of Plant Biology, 2005
- Caloramator viterbensis sp. nov., a novel thermophilic, glycerol-fermenting bacterium isolated from a hot spring in ItalyInternational Journal of Systematic and Evolutionary Microbiology, 2002
- REVOLUTA regulates meristem initiation at lateral positionsThe Plant Journal, 2001