Formation of the shoot apical meristem in Arabidopsis thaliana: an analysis of development in the wild type and in the shoot meristemless mutant
Abstract
The primary shoot apical meristem of Arabidopsis is initiated late in embryogenesis, after the initiation of the cotyledons. We have identified a gene, called SHOOT MERISTEMLESS, which is critical for this process. shoot meristemless mutant seedlings lack a shoot apical meristem but are otherwise healthy and viable. The anatomy of mutant embryos demonstrates that the shoot meristemless-1 mutation completely blocks the initiation of the shoot apical meristem, but has no other obvious effects on embryo development. The failure of shoot meristemless tissue to regenerate shoots in tissue culture suggests that this gene regulates adventitious shoot meristem formation, as well as embryonic shoot meristem formation.
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The primary SAM initiates at the bending-cotyledon stage from a small group of cells and bulges into the characteristic dome-shaped structure.
“The primary SAM initiates at the bending-cotyledon stage from a small group of cells (Barton & Poethig, 1993) and bulges into the characteristic domeshaped structure (Fig. 4a,d).”
From <i>Divide et impera</i>: boundaries shape the plant body and initiate new meristems (2016) · cites this paper as Barton & Poethig, 1993
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- Authors
- Barton, M. K., & Poethig, R. S.
- Affiliations
- University of Pennsylvania (US)
- Corresponding author
- Barton, M. Kathryn
- Venue
- Development
- Publisher
- The Company of Biologists
- Published
- 1993-11-01
- Volume
- 119
- Issue
- 3
- Pages
- 823-831
- ISSN
- 0950-1991 (ISSN-L)
- 1477-9129
- OpenAlex
- W1928641556
- Cited by
- 626
- References
- 0
- Citations by year
- 2026: 9 · 2025: 7 · 2024: 13 · 2023: 15 · 2022: 8 · 2021: 19 · 2020: 8 · 2019: 7 · 2018: 6 · 2017: 15 · 2016: 17 · 2015: 16 · 2014: 11 · 2013: 19 · 2012: 37
- FWCI
- 20.49
- Type
- journal article
- Language
- en
- Open access
- closed
- Locations
- Development (publishedVersion)
- 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 › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Plant tissue culture and regeneration
- Keywords
- shoot apical meristem, SHOOT MERISTEMLESS, embryonic development, shoot regeneration, Arabidopsis thaliana, gene function
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