Cited by 166Plant Molecular Biology ResearchDevelopmental Biology and Gene RegulationPlant Parasitism and Resistance

Arabidopsis JAGGED LATERAL ORGANS Is Expressed in Boundaries and Coordinates KNOX and PIN Activity

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Borghi, Lorenzo, Bureau, Marina, Simon, Rüdiger·2007·The Plant Cell

Abstract

Plant lateral organs are initiated as small protrusions on the flanks of shoot apical meristems. Organ primordia are separated from the remainder of the meristem by distinct cell types that create a morphological boundary. The Arabidopsis thaliana gain-of-function mutant jagged lateral organs-D (jlo-D) develops strongly lobed leaves, indicative of KNOX gene misexpression, and the shoot apical meristem arrests organ initiation prematurely, terminating in a pin-like structure. The JLO gene, a member of the LATERAL ORGAN BOUNDARY DOMAIN gene family, is expressed in boundaries between meristems and organ primordia and during embryogenesis. Inducible JLO misexpression activates expression of the KNOX genes SHOOT MERISTEMLESS and KNAT1 in leaves and downregulates the expression of PIN auxin export facilitators. Consequently, bulk auxin transport through the inflorescence stem is drastically reduced. During embryogenesis, JLO is required for the initiation of cotyledons and development beyond the globular stage. Converting JLO into a transcriptional repressor causes organ fusions, showing that during postembryonic development, JLO function is required to maintain the integrity of boundaries between cell groups with indeterminate or determinate fates.

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Crossref · 10.1105/tpc.106.047159

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Authors
Borghi, L., Bureau, M., & Simon, R.
Affiliations
  • Heinrich Heine University Düsseldorf (DE)
  • Institut für Genetik, Heinrich-Heine-Universität, 40225 Düsseldorf, Germany
Venue
The Plant Cell
Published
2007-06-01
Volume
19
Issue
6
Pages
1795-1808
ISSN
  • 1040-4651 (ISSN-L)
  • 1532-298X
OpenAlex
W2096198247
Cited by
161
References
52
Citations by year
2026: 2 · 2025: 7 · 2024: 6 · 2023: 3 · 2022: 2 · 2021: 11 · 2020: 6 · 2019: 2 · 2018: 4 · 2017: 11 · 2016: 8 · 2015: 12 · 2014: 6 · 2013: 11 · 2012: 15
FWCI
17.42
Type
journal article
Language
en
Open access
Locations
  • The Plant Cell (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
Funders
European Commission
Topics
  • Life Sciences › Agricultural and Biological Sciences › Plant Science › Plant Molecular Biology Research
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Developmental Biology and Gene Regulation
  • Life Sciences › Agricultural and Biological Sciences › Plant Science › Plant Parasitism and Resistance
Keywords
KNOX genes, PIN auxin transporters, shoot apical meristem, organ primordia, leaf lobes, SHOOT MERISTEMLESS, embryonic development, organ boundaries, auxin transport, Arabidopsis thaliana
MeSH terms
Biological Transport, Genes, Dominant, Indoleacetic Acids, Mutation, Phenotype, Repressor Proteins, Seeds, Transcription Factors, Signal Transduction, Genes, Plant, Arabidopsis, Homeodomain Proteins, Gene Expression Regulation, Plant, Cell Cycle Proteins, Membrane Transport Proteins, Arabidopsis Proteins, Embryonic Development, Mutant Proteins

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