Photoreceptor Signaling Networks in Plant Responses to Shade

Annual Review of Plant Biology, Journal Year: 2013, Volume and Issue: 64(1), P. 403 - 427

Published: Feb. 2, 2013

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 limiting or excessive acclimation cope with conditions that cannot be avoided. low red/far-red ratios shade reduce phytochrome B activity, which allows PHYTOCHROME INTERACTING FACTORS (PIFs) directly activate the transcription auxin-synthesis genes, leading shade-avoidance responses. Direct PIF interaction DELLA proteins links gibberellin brassinosteroid signaling avoidance. Shade also requires CONSTITUTIVE PHOTOMORPHOGENESIS 1 (COP1), a target UVR8. Multiple regulatory loops input circadian clock create complex network able respond even subtle threats competition neighbors while still compensating for major environmental fluctuations such as day-night cycles.

Language: Английский

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Phytochrome Signaling Mechanisms

The Arabidopsis Book, Journal Year: 2011, Volume and Issue: 9, P. e0148 - e0148

Published: Jan. 1, 2011

Phytochromes are red (R)/far-red (FR) light photoreceptors that play fundamental roles in photoperception of the environment and subsequent adaptation plant growth development. There five distinct phytochromes Arabidopsis thaliana, designated phytochrome A (phyA) to phyE. phyA is light-labile primary photoreceptor responsible for mediating photomorphogenic responses FR light, whereas phyB-phyE stable, phyB predominant regulating de-etiolation R light. synthesized cytosol their inactive Pr form. Upon irradiation, converted biologically active Pfr form, translocate into nucleus. can enter nucleus by itself response nuclear import depends on two small plant-specific proteins FAR-RED ELONGATED HYPOCOTYL 1 (FHY1) FHY1-LIKE (FHL). may function as light-regulated serine/threonine kinases, phosphorylate several substrates, including themselves vitro. phosphoproteins, be dephosphorylated a few protein phosphatases. Photoactivated rapidly change expression light-responsive genes repressing activity CONSTITUTIVE PHOTOMORPHOGENIC (COP1), an E3 ubiquitin ligase targeting photomorphogenesis-promoting transcription factors degradation, inducing rapid phosphorylation degradation Phytochrome-Interacting Factors (PIFs), group bHLH photomorphogenesis. targeted COP1 via ubiquitin/26S proteasome pathway.

Language: Английский

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Blue Light-Dependent Interaction of CRY2 with SPA1 Regulates COP1 activity and Floral Initiation in Arabidopsis

Current Biology, Journal Year: 2011, Volume and Issue: 21(10), P. 841 - 847

Published: April 24, 2011

Language: Английский

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Arabidopsis cryptochrome 1 interacts with SPA1 to suppress COP1 activity in response to blue light

Genes & Development, Journal Year: 2011, Volume and Issue: 25(10), P. 1029 - 1034

Published: April 21, 2011

Plant photoreceptors mediate light suppression of the E3 ubiquitin ligase COP1 (CONSTITUTIVE PHOTOMORPHOGENIC 1) to affect gene expression and photomorphogenesis. However, how regulation activity remains unknown. We report here that Arabidopsis blue-light receptor cryptochrome 1 (CRY1) undergoes blue-light-dependent interaction with COP1-interacting protein SPA1 (SUPPRESSOR OF PHYTOCHROME A). further show CRY1–SPA1 suppresses SPA1–COP1 COP1-dependent degradation transcription factor HY5. These results are consistent a hypothesis photoexcited CRY1 interacts modulate plant development.

Language: Английский

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Shade Avoidance

The Arabidopsis Book, Journal Year: 2012, Volume and Issue: 10, P. e0157 - e0157

Published: Jan. 1, 2012

The presence of neighboring vegetation modifies the light environment experienced by plants, generating signals that are perceived phytochromes and cryptochromes. These cause large changes in plant body form function, including enhanced growth hypocotyl petioles, a more erect position leaves early flowering Arabidopsis thaliana. Collectively, these so-called shade-avoidance responses tend to reduce degree current or future shade neighbors. Shade increase abundance PHYTOCHROME INTERACTING FACTOR 4 (PIF4) PIF5 proteins, promote synthesis redirection auxin, favor degradation DELLA proteins expression gibberellins brassinosteroid-promoted genes, among other events downstream photoreceptors. Selectively disrupting genetic pharmacological approaches affects with an intensity depends on developmental context environment. Shade-avoidance provide model investigate signaling networks used plants take advantage cues provided adjust challenges imposed itself.

Language: Английский

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The action mechanisms of plant cryptochromes

Trends in Plant Science, Journal Year: 2011, Volume and Issue: 16(12), P. 684 - 691

Published: Oct. 15, 2011

Language: Английский

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Optogenetic control of intracellular signaling pathways

Trends in biotechnology, Journal Year: 2014, Volume and Issue: 33(2), P. 92 - 100

Published: Dec. 16, 2014

Language: Английский

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Blue Light added with Red LEDs Enhance Growth Characteristics, Pigments Content, and Antioxidant Capacity in Lettuce, Spinach, Kale, Basil, and Sweet Pepper in a Controlled Environment

Plants, Journal Year: 2019, Volume and Issue: 8(4), P. 93 - 93

Published: April 8, 2019

The aim of this study was to investigate the different combinations red (R) and blue (B) light emitting diode (LEDs') lighting effects on growth, pigment content, antioxidant capacity in lettuce, spinach, kale, basil, pepper a growth chamber. chamber equipped with R B percentages based total intensity: 83% + 17% B; 91% 9% 95% 5% control 100% R. photosynthetic photon flux density (PPFD), photoperiod, temperature, relative humidity were maintained at 200 ± 5 μmol m-2 s-1, 16 h, 25/21 2.5 °C, 65 5%, respectively. It is observed that plant height significantly increased under light, whereas spinach basil did not show any significant difference. leaf number treatment while no difference for other species same treatment. Overall, fresh dry mass studied plants higher flower fruit numbers chlorophyll a, b, content kale carotenoid lettuce This result indicates addition essential enhance vegetable controlled environment. Moreover, percentage dependent.

Language: Английский

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Blue-Light Receptors for Optogenetics

Chemical Reviews, Journal Year: 2018, Volume and Issue: 118(21), P. 10659 - 10709

Published: July 9, 2018

Sensory photoreceptors underpin light-dependent adaptations of organismal physiology, development, and behavior in nature. Adapted for optogenetics, sensory become genetically encoded actuators reporters to enable the noninvasive, spatiotemporally accurate reversible control by light cellular processes. Rooted a mechanistic understanding natural photoreceptors, artificial with customized light-gated function have been engineered that greatly expand scope optogenetics beyond original application light-controlled ion flow. As we survey presently, UV/blue-light-sensitive particularly allowed transcend its initial neuroscience applications unlocking numerous additional processes parameters optogenetic intervention, including gene expression, DNA recombination, subcellular localization, cytoskeleton dynamics, intracellular protein stability, signal transduction cascades, apoptosis, enzyme activity. The engineering novel benefits from powerful reusable design strategies, most importantly association (un)folding reactions. Additionally, modified versions these same serve as fluorescent proteins generators singlet oxygen, thereby further enriching toolkit. available upcoming detailed quantitative interrogation networks increasingly more precise illuminating manners.

Language: Английский

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ABA-INSENSITIVE3, ABA-INSENSITIVE5, and DELLAs Interact to Activate the Expression ofSOMNUSand Other High-Temperature-Inducible Genes in Imbibed Seeds inArabidopsis

The Plant Cell, Journal Year: 2013, Volume and Issue: 25(12), P. 4863 - 4878

Published: Dec. 1, 2013

Abstract Seeds monitor the environment to germinate at proper time, but different species respond differently environmental conditions, particularly light and temperature. In Arabidopsis thaliana, promotes germination high temperature suppresses germination. We previously reported that by repressing SOMNUS (SOM). Here, we examined whether also regulates through SOM found activates expression. Consistent with this, som mutants germinated more frequently than wild type The induction of mRNA required abscisic acid (ABA) gibberellic biosynthesis, ABA-INSENSITIVE3 (ABI3), ABI5, DELLAs positively regulated Chromatin immunoprecipitation assays indicated ABI3, all target promoter. At protein level, interact each other, suggesting they form a complex on promoter activate expression high-temperature-inducible genes have RY motifs ABA-responsive elements in their promoters, some which are targeted vivo. Taken together, our data indicate mediate high-temperature signaling other genes, thereby inhibiting seed

Language: Английский

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