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          Institute: MPI für Pflanzenzüchtungsforschung     Collection: Dept. Plant Breeding and Yield Physiology (Francesco Salamini)     Display Documents

ID: 28834.0, MPI für Pflanzenzüchtungsforschung / Dept. Plant Breeding and Yield Physiology (Francesco Salamini)
Molecular analysis of the LATERAL SUPPRESSOR gene in Arabidopsis reveals a conserved control mechanism for axillary meristem formation
Authors:Greb, T.; Clarenz, O.; Schafer, E.; Mueller, D.; Herrero, R.; Schmitz, G.; Theres, K.
Date of Publication (YYYY-MM-DD):2003-05-01
Title of Journal:Genes & Development
Journal Abbrev.:Genes Dev.
Issue / Number:9
Start Page:1175
End Page:1187
Review Status:Peer-review
Audience:Experts Only
Abstract / Description:In seed plants, shoot branching is initiated by the formation of new meristems in the axils of leaves, which subsequently develop into new axes of growth. This study describes the genetic control of axillary meristem formation by the LATERAL SUPPRESSOR (LAS) gene in Arabidopsis thaliana.]as mutants show a novel phenotype that is characterized by the inability to form lateral shoots during vegetative development. The analysis shows that axillary meristem formation is differently regulated during different phases of development. During reproductive development, axillary meristems initiate in close proximity to the shoot apical meristem and do not require LAS function. In contrast, during the vegetative phase, axillary meristems initiate at a distance to the SAM and require LAS function. This control mechanism is conserved between the distantly related species tomato and Arabidopsis. Monitoring the patterns of LAS and SHOOT MERISTEMLESS transcript accumulation allowed us to identify early steps in the development of leaf axil identity, which seem to be a prerequisite for axillary meristem initiation. Other regulators of shoot branching, like REVOLUTA and AUXIN RESISTANT 1, act downstream of LAS. The results are discussed in the context of the "detached meristem" and the "de novo formation" concepts of axillary meristem formation.
Free Keywords:shoot branching; axillary meristem; LATERAL SUPPRESSOR; Arabidopsis thaliana
Comment of the Author/Creator:Date: 2003, MAY 1
External Publication Status:published
Document Type:Article
Communicated by:N.N.
Affiliations:MPI für Pflanzenzüchtungsforschung
External Affiliations:Max Planck Inst Plant Breeding Res, D-50829 Cologne, Germany; Max Planck Inst Plant Breeding Res, D-50829 Cologne, Germany
Identifiers:ISI:000182671500011 [ID No:1]
ISSN:0890-9369 [ID No:2]
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