Cited by 152Plant Molecular Biology ResearchPlant Parasitism and ResistanceLight effects on plants

AXR1 Acts after Lateral Bud Formation to Inhibit Lateral Bud Growth in Arabidopsis

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Stirnberg, Petra, Chatfield, Steven P., Leyser, H.M. Ottoline·1999·Plant Physiology

Abstract

The AXR1 gene of Arabidopsis is required for many auxin responses. The highly branched shoot phenotype of mature axr1 mutant plants has been taken as genetic evidence for a role of auxin in the control of shoot branching. We compared the development of lateral shoots in wild-type Columbia and axr1-12 plants. In the wild type, the pattern of lateral shoot development depends on the developmental stage of the plant. During prolonged vegetative growth, axillary shoots arise and develop in a basal-apical sequence. After floral transition, axillary shoots arise rapidly along the primary shoot axis and grow out to form lateral inflorescences in an apical-basal sequence. For both patterns, the axr1mutation does not affect the timing of axillary meristem formation; however, subsequent lateral shoot development proceeds more rapidly inaxr1 plants. The outgrowth of lateral inflorescences from excised cauline nodes of wild-type plants is inhibited by apical auxin. axr1-12 nodes are resistant to this inhibition. These results provide evidence for common control of axillary growth in both patterns, and suggest a role for auxin during the late stages of axillary shoot development following the formation of the axillary bud and several axillary leaf primordia.

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Authors
Stirnberg, P., Chatfield, S. P., & Leyser, H. M. O.
Affiliations
  • University of York (GB)
  • Department of Biology, University of York, P.O. Box 373, York YO10 5YW, United Kingdom
Venue
Plant Physiology
Published
1999-11-01
Volume
121
Issue
3
Pages
839-847
ISSN
  • 0032-0889 (ISSN-L)
  • 1532-2548
OpenAlex
W2140472686
Cited by
152
References
44
Citations by year
2026: 1 · 2025: 1 · 2024: 5 · 2023: 2 · 2022: 9 · 2021: 9 · 2020: 4 · 2019: 5 · 2018: 3 · 2017: 5 · 2016: 2 · 2015: 3 · 2014: 4 · 2013: 4 · 2012: 10
FWCI
7.49
Type
journal article
Language
en
Open access
Locations
  • PLANT PHYSIOLOGY (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
  • White Rose Research Online (University of Leeds, The University of Sheffield, University of York) (acceptedVersion)
Funders
Directorate for Biological Sciences
Topics
  • Life Sciences › Agricultural and Biological Sciences › Plant Science › Plant Molecular Biology Research
  • Life Sciences › Agricultural and Biological Sciences › Plant Science › Plant Parasitism and Resistance
  • Life Sciences › Agricultural and Biological Sciences › Plant Science › Light effects on plants
Keywords
AXR1, auxin response, lateral bud growth, shoot branching, axillary meristem, axillary inflorescence, floral induction, leaf primordia, Arabidopsis thaliana
MeSH terms
Growth Substances, Plant Proteins, Arabidopsis, Photoperiod, Meristem, Plant Shoots, Arabidopsis Proteins

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