Cited by 352Plant Molecular Biology ResearchDevelopmental Biology and Gene RegulationPlant Parasitism and Resistance

BLADE-ON-PETIOLE–Dependent Signaling Controls Leaf and Floral Patterning in Arabidopsis

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Hepworth, Shelley R., Zhang, Yuelin, McKim, Sarah, Li, Xin, Haughn, George W.·2005·The Plant Cell

Abstract

NONEXPRESSOR OF PR GENES1 (NPR1) is a key regulator of the plant defense response known as systemic acquired resistance. Accumulation of the signal molecule salicylic acid (SA) leads to a change in intracellular redox potential, enabling NPR1 to enter the nucleus and interact with TGACG sequence-specific binding protein (TGA) transcription factors, which in turn bind to SA-responsive elements in the promoters of defense genes. Here, we show that two NPR1-like genes, BLADE-ON-PETIOLE1 (BOP1) and BOP2, function redundantly to control growth asymmetry, an important aspect of patterning in leaves and flowers. Phenotypes in the double mutant include leafy petioles, loss of floral organ abscission, and asymmetric flowers subtended by a bract. We demonstrate that BOP2 is localized to both the nucleus and the cytoplasm, but unlike NPR1, it is highly expressed in young floral meristems and in yeast interacts preferentially with the TGA transcription factor encoded by PERIANTHIA (PAN). In support of a biological relevance for this interaction, we show that bop1 bop2 and pan mutants share a pentamerous arrangement of first whorl floral organs, a patterning defect that is retained in bop1 bop2 pan triple mutants. Our data provide evidence that BOP proteins control patterning via direct interactions with TGA transcription factors and demonstrate that a signaling mechanism similar to that formally associated with plant defense is likely used for the control of developmental patterning.

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Crossref · 10.1105/tpc.104.030536

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  • Both bop1 and bop2 mutants display defects in inflorescence development, frequently forming fused inflorescences and generating multiple flowers from the same node.

    “Both bop1 and bop2 mutants display defects in inflorescence development, as they frequently form fused inflorescences and generate multiple flowers from the same node (Hepworth et al., 2005;Ha et al., 2007).”

    From <i>Divide et impera</i>: boundaries shape the plant body and initiate new meristems (2016) · cites this paper as Hepworth et al., 2005

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Authors
Hepworth, S. R., Zhang, Y., McKim, S., Li, X., & Haughn, G. W.
Affiliations
University of British Columbia (CA)
Venue
The Plant Cell
Published
2005-04-01
Volume
17
Issue
5
Pages
1434-1448
ISSN
  • 1040-4651 (ISSN-L)
  • 1532-298X
OpenAlex
W2153891726
Cited by
351
References
72
Citations by year
2026: 14 · 2025: 18 · 2024: 14 · 2023: 23 · 2022: 18 · 2021: 32 · 2020: 13 · 2019: 17 · 2018: 18 · 2017: 14 · 2016: 12 · 2015: 21 · 2014: 14 · 2013: 14 · 2012: 21
FWCI
15.24
Type
journal article
Language
en
Open access
Locations
  • The Plant Cell (publishedVersion)
  • PubMed (publishedVersion)
  • PubMed Central (publishedVersion)
Funders
  • University of British Columbia
  • Directorate for Biological Sciences
  • Microscopy Imaging Center, University of Bern
  • Natural Sciences and Engineering Research Council of Canada
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
TGA transcription factors, floral organ patterning, floral meristem, floral organ abscission, bracts, plant defense signaling, salicylic acid, redox signaling, Arabidopsis thaliana
MeSH terms
Cell Nucleus, Cytoplasm, Molecular Sequence Data, Mutation, Phylogeny, Sequence Homology, Nucleic Acid, Transcription Factors, Signal Transduction, Arabidopsis, Gene Expression Regulation, Plant, Plant Leaves, Arabidopsis Proteins, Flowers, Regulatory Elements, Transcriptional

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