Phototropism: at the crossroads of light-signaling pathways
Open accessAbstract
Phototropism enables plants to orient growth towards the direction of light and thereby maximizes photosynthesis in low-light environments. In angiosperms, blue-light photoreceptors called phototropins are primarily involved in sensing the direction of light. Phytochromes and cryptochromes (sensing red/far-red and blue light, respectively) also modulate asymmetric hypocotyl growth, leading to phototropism. Interactions between different light-signaling pathways regulating phototropism occur in cryptogams and angiosperms. In this review, we focus on the molecular mechanisms underlying the co-action between photosensory systems in the regulation of hypocotyl phototropism in Arabidopsis thaliana. Recent studies have shown that phytochromes and cryptochromes enhance phototropism by controlling the expression of important regulators of phototropin signaling. In addition, phytochromes may also regulate growth towards light via direct interaction with the phototropins.
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Phototropism allows plants to orient their photosynthetic organs toward the light and occurs in mosses, ferns, and angiosperms.
“Phototropism allows plants to orient their photosynthetic organs toward the light and this behavior also occurs in mosses, ferns, and angiosperms (Takemiya et al. 2005; Suetsugu and Wada, 2007b; Goyal et al. 2013; Hohm et al. 2013; Briggs, 2014).”
From The action of enhancing weak light capture via phototropic growth and chloroplast movement in plants (2022) · cites this paper as Goyal et al. 2013
Phytochrome A and cryptochromes sense blue light signals, are localized in the nucleus, and indirectly affect hypocotyl phototropism by regulating transcription of related genes.
“Phytochrome A (PHYA) and cryptochromes (CRYs) can also sense blue light signals. These proteins are localized in the nucleus and indirectly affect the phototropism of hypocotyls by regulating the transcription of related genes (Kang et al., 2008; Nagashima et al., 2008b; Goyal et al., 2013; Liscum et al., 2014).”
From The action of enhancing weak light capture via phototropic growth and chloroplast movement in plants (2022) · cites this paper as Goyal et al., 2013
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References 100 · Cited by 109
- Authors
- Goyal, A., Szarzynska, B., & Fankhauser, C.
- Affiliations
- University of Lausanne (CH)
- Venue
- Trends in Plant Science
- Publisher
- Elsevier BV
- Published
- 2013-07
- Volume
- 18
- Issue
- 7
- Pages
- 393-401
- ISSN
- 1360-1385 (ISSN-L)
- OpenAlex
- W2055835210
- Cited by
- 109
- References
- 100
- Citations by year
- 2026: 7 · 2025: 6 · 2024: 7 · 2023: 8 · 2022: 7 · 2021: 5 · 2020: 7 · 2019: 11 · 2018: 10 · 2017: 7 · 2016: 15 · 2015: 10 · 2014: 8 · 2013: 1
- FWCI
- 1.21
- Type
- journal article
- Language
- en
- Open access
- green
- serval.unil.ch
- Licence
- other-oa
- Locations
- Trends in Plant Science (publishedVersion)
- PubMed (publishedVersion)
- SERVAL (Université de Lausanne) (acceptedVersion, other-oa)
- IRIS (submittedVersion)
- Topics
- Life Sciences › Agricultural and Biological Sciences › Plant Science › Light effects on plants
- Life Sciences › Agricultural and Biological Sciences › Plant Science › Plant Molecular Biology Research
- Life Sciences › Agricultural and Biological Sciences › Plant Science › Plant Parasitism and Resistance
- Keywords
- phototropism, light signaling, phototropin, phytochrome, cryptochrome, hypocotyl growth, Arabidopsis thaliana, blue-light photoreceptor, red and far-red light, plant growth regulation
- MeSH terms
- Indoleacetic Acids, Plant Proteins, Arabidopsis, Gene Expression Regulation, Plant, Phototropism, Light Signal Transduction
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