Plant Phototropic Growth
Open accessAbstract
Plants are photoautotrophic sessile organisms that use environmental cues to optimize multiple facets of growth and development. A classic example is phototropism - in shoots this is typically positive, leading to growth towards the light, while roots frequently show negative phototropism triggering growth away from the light. Shoot phototropism optimizes light capture of leaves in low light environments and hence increases photosynthetic productivity. Phototropins are plasma-membrane-associated UV-A/blue-light activated kinases that trigger phototropic growth. Light perception liberates their protein kinase domain from the inhibitory action of the amino-terminal photosensory portion of the photoreceptor. Following a series of still poorly understood events, phototropin activation leads to the formation of a gradient of the growth hormone auxin across the photo-stimulated stem. The greater auxin concentration on the shaded compared with the lit side of the stem enables growth reorientation towards the light. In this Minireview, we briefly summarize the signaling steps starting from photoreceptor activation until the establishment of a lateral auxin gradient, ultimately leading to phototropic growth in shoots.
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Plants can perceive a broad spectrum of light from ultraviolet to far-red, but only ultraviolet-B and blue light can induce phototropism.
“Plants can perceive a broad spectrum of light, from ultraviolet to far-red; however, only ultraviolet-B and blue light can induce phototropism (Liscum et al., 2014; Fankhauser and Christie, 2015).”
From The action of enhancing weak light capture via phototropic growth and chloroplast movement in plants (2022) · cites this paper as Fankhauser and Christie, 2015
The paper supports UV-B and blue-light induction of phototropism (Photoreceptors, p. 4), but contradicts the claim that only those wavelengths can induce it. It also reports red-light phototropism in ferns and mosses (Photoreceptors, p. 5) and describes UV/blue induction across 290–500 nm in flowering plants (p. 3). (LLM, conf=0.90)
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- Authors
- Fankhauser, C., & Christie, J. M.
- Affiliations
- University of Lausanne (CH)
- University of Glasgow (GB)
- Corresponding author
- Fankhauser, Christian
- Venue
- Current Biology
- Publisher
- Elsevier BV
- Published
- 2015-05
- Volume
- 25
- Issue
- 9
- Pages
- R384-R389
- ISSN
- 0960-9822 (ISSN-L)
- OpenAlex
- W1603993257
- Cited by
- 167
- References
- 69
- Citations by year
- 2026: 15 · 2025: 13 · 2024: 15 · 2023: 6 · 2022: 17 · 2021: 19 · 2020: 11 · 2019: 22 · 2018: 18 · 2017: 16 · 2016: 13 · 2015: 2
- FWCI
- 1.70
- Type
- journal article
- Language
- en
- Open access
- bronze
- doi.org
- Licence
- Locations
- Current Biology (publishedVersion)
- PubMed (publishedVersion)
- SERVAL (Université de Lausanne) (acceptedVersion, other-oa)
- IRIS (submittedVersion)
- ENLIGHTEN (Jurnal Bimbingan dan Konseling Islam) (submittedVersion)
- Funders
- National Science Foundation
- Schweizerischer Nationalfonds zur Förderung der Wissenschaftlichen Forschung (124747, 154438)
- Université de Lausanne
- SystemsX.ch
- Directorate for Biological Sciences
- Biotechnology and Biological Sciences Research Council (BB/J016047/1, BB/M002128/1, BB/K008129/1)
- 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, phototropin, photoreceptors, auxin gradients, light signaling
- MeSH terms
- Indoleacetic Acids, Ultraviolet Rays, Arabidopsis, Phototropism, Phototropins, Plant Development
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