Cited by 866Light effects on plantsPlant Parasitism and ResistancePlant Molecular Biology Research

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Photoreceptor Signaling Networks in Plant Responses to Shade

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Casal, Jorge J.·2013·Annual Review of Plant Biology

DOI 10.1146/annurev-arplant-050312-120221

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Abstract

The dynamic light environment of vegetation canopies is perceived by phytochromes, cryptochromes, phototropins, and UV RESISTANCE LOCUS 8 (UVR8). These receptors control avoidance responses to preclude exposure to limiting or excessive light and acclimation responses to cope with conditions that cannot be avoided. The low red/far-red ratios of shade light reduce phytochrome B activity, which allows PHYTOCHROME INTERACTING FACTORS (PIFs) to directly activate the transcription of auxin-synthesis genes, leading to shade-avoidance responses. Direct PIF interaction with DELLA proteins links gibberellin and brassinosteroid signaling to shade avoidance. Shade avoidance also requires CONSTITUTIVE PHOTOMORPHOGENESIS 1 (COP1), a target of cryptochromes, phytochromes, and UVR8. Multiple regulatory loops and the input of the circadian clock create a complex network able to respond even to subtle threats of competition with neighbors while still compensating for major environmental fluctuations such as the day-night cycles.

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“PIFs regulate multiple processes related to plant growth, including auxin synthesis (Hornitschek et al. 2012; Li et al. 2012; Casal 2013).”
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“Light is the primary energy source for photosynthesis in plants, and its intensity and quality vary continuously under the influence of weather conditions and seasonal shifts due to solar inclination (Casal 2013).”
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“…thus, the increased absorption of red light can cause an imbalance in the red to far-red ratio [23], causing fewer phytochromes in the active form (Prf) to migrate into the cell and degrade PIF proteins, which act by triggering a cascade of reactions in gene signaling related to elongation [24].”
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“Upon perception of shade cues, plant phytochromes convert from Pfr form (the active state) to Pr form (the inactive state), leading to attenuation of light signalling and initiation of the molecular and morphological changes (Casal 2013).”
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Additional file 1 of EMS-induced mutagenesis in Choy sum (Brassica chinensis var. parachinensis) and selection for low light tolerance using abiotic stress indices
Deivanai, S., Sng, B. J. R., Vu, K. V., Shibu, T. S. M., Jang, I., & Ramachandran, S. (2023) · Figshare · doi:10.6084/m9.figshare.24597812
Additional file 4 of Genome-wide identification of Brassicaceae B-BOX genes and molecular characterization of their transcriptional responses to various nutrient stresses in allotetraploid rapeseed
Zheng, L.-W., Ma, S.-J., Zhou, T., Yue, C.-P., Hua, Y., & Huang, J.-Y. (2021) · Figshare · doi:10.6084/m9.figshare.14843212
Additional file 2 of Layering contrasting photoselective filters improves the simulation of foliar shade
Petrella, D. P., Breuillin‐Sessoms, F., & Watkins, E. (2022) · Figshare · doi:10.6084/m9.figshare.19143119
Additional file 5 of Genome-wide identification of Brassicaceae B-BOX genes and molecular characterization of their transcriptional responses to various nutrient stresses in allotetraploid rapeseed
Zheng, L.-W., Ma, S.-J., Zhou, T., Yue, C.-P., Hua, Y., & Huang, J.-Y. (2021) · Figshare · doi:10.6084/m9.figshare.14843215
Additional file 1 of Genome-wide identification of Brassicaceae B-BOX genes and molecular characterization of their transcriptional responses to various nutrient stresses in allotetraploid rapeseed
Zheng, L.-W., Ma, S.-J., Zhou, T., Yue, C.-P., Hua, Y., & Huang, J.-Y. (2021) · Figshare · doi:10.6084/m9.figshare.14843203
Additional file 6 of Genome-wide identification of Brassicaceae B-BOX genes and molecular characterization of their transcriptional responses to various nutrient stresses in allotetraploid rapeseed
Zheng, L.-W., Ma, S.-J., Zhou, T., Yue, C.-P., Hua, Y., & Huang, J.-Y. (2021) · Figshare · doi:10.6084/m9.figshare.14843218
Additional file 7 of Genome-wide identification of Brassicaceae B-BOX genes and molecular characterization of their transcriptional responses to various nutrient stresses in allotetraploid rapeseed
Zheng, L.-W., Ma, S.-J., Zhou, T., Yue, C.-P., Hua, Y., & Huang, J.-Y. (2021) · Figshare · doi:10.6084/m9.figshare.14843221
Additional file 2 of Genome-wide identification of Brassicaceae B-BOX genes and molecular characterization of their transcriptional responses to various nutrient stresses in allotetraploid rapeseed
Zheng, L.-W., Ma, S.-J., Zhou, T., Yue, C.-P., Hua, Y., & Huang, J.-Y. (2021) · Figshare · doi:10.6084/m9.figshare.14843206

Authors: Casal, J. J.
Affiliations: Consejo Nacional de Investigaciones Científicas y Técnicas (AR)
Corresponding author: Casal, Jorge J.
ORCID: Casal, Jorge J.
Venue: Annual Review of Plant Biology
Publisher: Annual Reviews
Published: 2013-04-29
Volume: 64
Issue: 1
Pages: 403-427
ISSN: 1543-5008 (ISSN-L)
1545-2123
DOI: 10.1146/annurev-arplant-050312-120221
OpenAlex: W2107201571
Cited by: 865
References: 144
Citations by year: 2026: 81 · 2025: 66 · 2024: 72 · 2023: 61 · 2022: 79 · 2021: 91 · 2020: 67 · 2019: 60 · 2018: 62 · 2017: 60 · 2016: 58 · 2015: 44 · 2014: 51 · 2013: 13
FWCI: 5.94
Type: journal article
Language: en
Open access: green
hdl.handle.net
Licence: cc-by-nc-nd
Locations: Annual Review of Plant Biology (publishedVersion)
PubMed (publishedVersion)
CONICET Digital (CONICET) (submittedVersion, cc-by-nc-nd)
Funders: Consejo Nacional de Investigaciones Científicas y Técnicas
Universidad de Buenos Aires (CONICET)
Topics: Life Sciences › Agricultural and Biological Sciences › Plant Science › Light effects on plants
Life Sciences › Agricultural and Biological Sciences › Plant Science › Plant Parasitism and Resistance
Life Sciences › Agricultural and Biological Sciences › Plant Science › Plant Molecular Biology Research
Keywords: shade avoidance, photoreceptors, phytochrome, cryptochrome, phototropin, UVR8, phytochrome-interacting factors, DELLA proteins, gibberellin signaling, brassinosteroid signaling, auxin biosynthesis, COP1, circadian clock, red:far-red ratio, plant light signaling, canopy light environment
MeSH terms: Gibberellins, Light, Phytochrome, Plant Growth Regulators, Plants, Signal Transduction, Ecosystem, Photoreceptors, Plant

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Photoreceptor Signaling Networks in Plant Responses to Shade

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