Inhibition of shoot branching by new terpenoid plant hormones
Abstract
Shoot branching is a major determinant of plant architecture and is highly regulated by endogenous and environmental cues. Two classes of hormones, auxin and cytokinin, have long been known to have an important involvement in controlling shoot branching. Previous studies using a series of mutants with enhanced shoot branching suggested the existence of a third class of hormone(s) that is derived from carotenoids, but its chemical identity has been unknown. Here we show that levels of strigolactones, a group of terpenoid lactones, are significantly reduced in some of the branching mutants. Furthermore, application of strigolactones inhibits shoot branching in these mutants. Strigolactones were previously found in root exudates acting as communication chemicals with parasitic weeds and symbiotic arbuscular mycorrhizal fungi. Thus, we propose that strigolactones act as a new hormone class-or their biosynthetic precursors-in regulating above-ground plant architecture, and also have a function in underground communication with other neighbouring organisms.
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Auxin is an important signal in the regulatory network modulating the outgrowth of axillary buds.
“Auxin (Thimann and Skoog, 1934) and strigolactones (Gomez-Roldan et al., 2008;Umehara et al., 2008) have been identified as important signals in a regulatory network modulating the outgrowth of axillary buds.”
From Auxin Depletion from the Leaf Axil Conditions Competence for Axillary Meristem Formation in <i>Arabidopsis</i> and Tomato (2014) · cites this paper as Umehara et al., 2008
A root-to-shoot branching inhibitor was subsequently identified as a strigolactone (SL) or derived compound.
“which was subsequently identified as a strigolactone (SL) or derived compound (Gomez-Roldan et al., 2008;Umehara et al., 2008)”
From The Pea TCP Transcription Factor PsBRC1 Acts Downstream of Strigolactones to Control Shoot Branching (2012) · cites this paper as Umehara et al., 2008
Strigolactone inhibits shoot branching.
“it inhibits shoot branching (Gomez-Roldan et al., 2008; Umehara et al., 2008)”
From Shaping plant architecture (2015) · cites this paper as Umehara et al., 2008
Strigolactone biosynthesis generally occurs in roots and in the shoot.
“Strigolactone biosynthesis generally occurs in roots and in the shoot (Auldridge et al., 2006; Umehara et al., 2008; Mashiguchi et al., 2009).”
From Shaping plant architecture (2015) · cites this paper as Umehara et al., 2008
SLs are accepted as branching control factors for herbaceous monocots and dicots.
“Now, SLs are accepted as branching control factors for herbaceous monocots (Umehara et al., 2008) and dicots (Gomez-Roldan et al., 2008).”
From Shaping plant architecture (2015) · cites this paper as Umehara et al., 2008
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- Authors
- Umehara, M., Hanada, A., Yoshida, S., Akiyama, K., Arite, T., Takeda-Kamiya, N., Magome, H., Kamiya, Y., Shirasu, K., Yoneyama, K., Kyozuka, J., & Yamaguchi, S.
- Affiliations
- RIKEN (JP)
- Osaka Prefecture University (JP)
- The University of Tokyo (JP)
- Utsunomiya University (JP)
- Corresponding author
- Yamaguchi, Shinjiro
- ORCID
- Venue
- Nature
- Published
- 2008-08-10
- Volume
- 455
- Issue
- 7210
- Pages
- 195-200
- ISSN
- 0028-0836 (ISSN-L)
- 1476-4687
- OpenAlex
- W2119176276
- Cited by
- 2,105
- References
- 4
- Citations by year
- 2026: 80 · 2025: 119 · 2024: 140 · 2023: 137 · 2022: 146 · 2021: 141 · 2020: 129 · 2019: 111 · 2018: 113 · 2017: 105 · 2016: 93 · 2015: 120 · 2014: 102 · 2013: 121 · 2012: 108
- FWCI
- 136.62
- Type
- journal article
- Language
- en
- Open access
- closed
- Licence
- www.springer.com/tdm (tdm)
- Locations
- Nature (publishedVersion)
- PubMed (publishedVersion)
- RePEc: Research Papers in Economics (submittedVersion)
- Funders
- Ministry of Education, Culture, Sports, Science and Technology
- 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, shoot branching, plant architecture, terpenoid lactones, root exudates, auxin, cytokinins, plant hormones, arbuscular mycorrhizal fungi, parasitic weeds, plant communication
- MeSH terms
- Lactones, Mutation, Plant Growth Regulators, Oryza, Terpenes, Arabidopsis, Gene Expression Regulation, Plant, Plant Roots, Plant Shoots, Seedlings
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