Cited by 232Plant Parasitism and ResistancePlant biochemistry and biosynthesisPlant Molecular Biology Research

The Arabidopsis Ortholog of Rice DWARF27 Acts Upstream of MAX1 in the Control of Plant Development by Strigolactones

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Waters, Mark T., Brewer, Philip B., Bussell, John D., Smith, Steven M., Beveridge, Christine A.·2012·Plant Physiology

Abstract

Strigolactones (SLs) are carotenoid-derived plant hormones that regulate shoot branching, secondary growth, root development, and responses to soil phosphate. In Arabidopsis (Arabidopsis thaliana), SL biosynthesis requires the sequential action of two carotenoid cleavage dioxygenases, MORE AXILLARY GROWTH3 (MAX3) and MAX4, followed by a cytochrome P450, MAX1. In rice (Oryza sativa), the plastid-localized protein DWARF27 (OsD27) is also necessary for SL biosynthesis, but the equivalent gene in Arabidopsis has not been identified. Here, we use phylogenetic analysis of D27-like sequences from photosynthetic organisms to identify AtD27, the likely Arabidopsis ortholog of OsD27. Using reverse genetics, we show that AtD27 is required for the inhibition of secondary bud outgrowth and that exogenous application of the synthetic SL GR24 can rescue the increased branching phenotype of an Atd27 mutant. Furthermore, we use grafting to demonstrate that AtD27 operates on a nonmobile precursor upstream of MAX1 in the SL biosynthesis pathway. Consistent with the plastid localization of OsD27, we also show that AtD27 possesses a functional plastid transit peptide. We demonstrate that AtD27 transcripts are subject to both local feedback and auxin-dependent signals, albeit to a lesser extent than MAX3 and MAX4, suggesting that early steps in SL biosynthesis are coregulated at the transcriptional level. By identifying an additional component of the canonical SL biosynthesis pathway in Arabidopsis, we provide a new tool to investigate the regulation of shoot branching and other SL-dependent developmental processes.

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Crossref · 10.1104/pp.112.196253

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  • SL biosynthesis starts from carotenoid precursors via D27.

    “SL biosynthesis starts from carotenoid precursors via the action of the all-trans/9-cis-β-carotene isomerase D27 in rice and AtD27 in Arabidopsis (Lin et al., 2009; Waters et al., 2012).”

    From Shaping plant architecture (2015) · cites this paper as Waters et al., 2012

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Authors
Waters, M. T., Brewer, P. B., Bussell, J. D., Smith, S. M., & Beveridge, C. A.
Affiliations
The University of Queensland (AU)
Venue
Plant Physiology
Published
2012-05-22
Volume
159
Issue
3
Pages
1073-1085
ISSN
  • 0032-0889 (ISSN-L)
  • 1532-2548
OpenAlex
W2072468097
Cited by
232
References
52
Citations by year
2026: 9 · 2025: 10 · 2024: 22 · 2023: 16 · 2022: 15 · 2021: 16 · 2020: 12 · 2019: 18 · 2018: 20 · 2017: 15 · 2016: 16 · 2015: 19 · 2014: 17 · 2013: 18 · 2012: 9
FWCI
23.03
Type
journal article
Language
en
Open access
Locations
  • PLANT PHYSIOLOGY (publishedVersion, cc-by)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
  • eCite Digital Repository (University of Tasmania) (submittedVersion)
  • Adelaide Research & Scholarship (AR&S) (University of Adelaide) (submittedVersion)
  • Figshare (submittedVersion, cc-by)
Funders
Australian Research Council (DP1096717)
Topics
  • Life Sciences › Agricultural and Biological Sciences › Plant Science › Plant Parasitism and Resistance
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Plant biochemistry and biosynthesis
  • Life Sciences › Agricultural and Biological Sciences › Plant Science › Plant Molecular Biology Research
Keywords
strigolactones, strigolactone biosynthesis, MAX1, carotenoid cleavage dioxygenase, plastid transit peptide, shoot branching, GR24, transcriptional feedback loop, Arabidopsis thaliana, rice
MeSH terms
Indoleacetic Acids, Lactones, Models, Biological, Morphogenesis, Mutation, Phylogeny, Oryza, RNA, Messenger, Arabidopsis, Sequence Homology, Amino Acid, Plastids, Gene Expression Regulation, Plant, Plant Shoots, Protein Transport, Feedback, Physiological, Arabidopsis Proteins, Biosynthetic Pathways

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