Photomorphogenic responses to ultraviolet‐B light

Jenkins, Gareth I.

doi:10.1111/pce.12934

Cited by 176 publications

(170 citation statements)

References 145 publications

(326 reference statements)

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“…Finally, the results presented here also demonstrate that UVR8, the UV‐B photoreceptor, regulates the observed delay in flowering time by UV‐B light by regulating the expression of flowering genes after exposure. In the UVR8 signalling cascade, CONSTITUTIVELY PHOTOMORPHOGENIC1 (COP1) acts as a positive regulator of responses to UV‐B (Jenkins, ). When UVR8 and COP1 interact, transcriptional activation of several UV‐B responsive genes occur, in particular HY5 and HYH expression is activated (Favory et al, ).…”

Section: Discussionmentioning

confidence: 99%

UV‐B radiation delays flowering time through changes in the PRC2 complex activity and miR156 levels in Arabidopsis thaliana

Dotto

Gómez

Soto

2018

Plant Cell & Environment

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UV-B is a high-energy component of the solar radiation perceived by the plant and induces a number of modifications in plant growth and development, including changes in flowering time. However, the molecular mechanisms underlying these changes are largely unknown. In the present work, we demonstrate that Arabidopsis plants grown under white light supplemented with UV-B show a delay in flowering time, and this developmental reprogramming is mediated by the UVR8 photoreceptor. Using a combination of gene expression analyses and UV-B irradiation of different flowering mutants, we gained insight into the pathways involved in the observed flowering time delay in UV-B-exposed Arabidopsis plants. We provide evidence that UV-B light downregulates the expression of MSI1 and CLF, two of the components of the polycomb repressive complex 2, which in consequence drives a decrease in H3K27me3 histone methylation of MIR156 and FLC genes. Modification in the expression of several flowering time genes as a consequence of the decrease in the polycomb repressive complex 2 activity was also determined. UV-B exposure of flowering mutants supports the involvement of this complex in the observed delay in flowering time, mostly through the age pathway.

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Section: Discussionmentioning

confidence: 99%

UV‐B radiation delays flowering time through changes in the PRC2 complex activity and miR156 levels in Arabidopsis thaliana

Dotto

Gómez

Soto

2018

Plant Cell & Environment

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“…Red and far-red light (600–750 nm) is primarily detected by the phytochrome family 8 while blue and UV-A light (320–500 nm) is sensed by cryptochromes, phototropins, and members of ZEITLUPE/ADAGIO family 7,9–11 . UV-B light (290–320 nm) is perceived by the UVR8 photoreceptor 12 . In addition to these characterised photosensors, plants are also able to respond to ‘green’ light (500–600 nm), although the photoreceptors responsible for these responses have not been elucidated 13 .…”

Section: Plant Photoreceptorsmentioning

confidence: 99%

Using light to improve commercial value

Jones

2018

Hortic Res

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The plasticity of plant morphology has evolved to maximize reproductive fitness in response to prevailing environmental conditions. Leaf architecture elaborates to maximize light harvesting, while the transition to flowering can either be accelerated or delayed to improve an individual’s fitness. One of the most important environmental signals is light, with plants using light for both photosynthesis and as an environmental signal. Plants perceive different wavelengths of light using distinct photoreceptors. Recent advances in LED technology now enable light quality to be manipulated at a commercial scale, and as such opportunities now exist to take advantage of plants’ developmental plasticity to enhance crop yield and quality through precise manipulation of a crops’ lighting regime. This review will discuss how plants perceive and respond to light, and consider how these specific signaling pathways can be manipulated to improve crop yield and quality.

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“…In Raphanus sativus, UV-B exposure and abiotic stresses stimulate UVR8 gene expression (Jenkins, 2017). In other plant species, UVR8 gene expression can be inhibited by shading and elevated temperature, stimulated by UV-B, or stimulated by sunlight.…”

Section: Rele Vance and Re Silience Of Environmental And Stress Senmentioning

confidence: 99%

“…Early appearance of UVR8 in plant evolution and high similarity of UVR8 proteins may suggest that UVR8 helped early photosynthetic plants to protect themselves against high levels of UV-B prior to the formation of a significant ozone layer (Jenkins, 2017).…”

Section: Rele Vance and Re Silience Of Environmental And Stress Senmentioning

confidence: 99%

“…Sensing and signaling mechanisms were recognized to control vital processes of acclimation to climate change (Bräutigam et al, 2013;Nicotra et al, 2010;Tansey, Hadfield, & Phillimore, 2017), but generally considered to be a black box of limited knowledge and characterization (Leakey et al, 2009;Nicotra et al, 2010). Recent discoveries of the last 10 years (Christie et al, 2012;Jenkins, 2017;Jung et al, 2016;Legris et al, 2016;Zhu, 2016) now open the possibility of considering plant responses to climate change through the perspectives of environmental sensing and signaling.…”

Section: Introductionmentioning

confidence: 99%

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Pivotal roles of environmental sensing and signaling mechanisms in plant responses to climate change

Bigot

Buges

Gilly

et al. 2018

Global Change Biology

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Climate change reshapes the physiology and development of organisms through phenotypic plasticity, epigenetic modifications, and genetic adaptation. Under evolutionary pressures of the sessile lifestyle, plants possess efficient systems of phenotypic plasticity and acclimation to environmental conditions. Molecular analysis, especially through omics approaches, of these primary lines of environmental adjustment in the context of climate change has revealed the underlying biochemical and physiological mechanisms, thus characterizing the links between phenotypic plasticity and climate change responses. The efficiency of adaptive plasticity under climate change indeed depends on the realization of such biochemical and physiological mechanisms, but the importance of sensing and signaling mechanisms that can integrate perception of environmental cues and transduction into physiological responses is often overlooked. Recent progress opens the possibility of considering plant phenotypic plasticity and responses to climate change through the perspective of environmental sensing and signaling. This review aims to analyze present knowledge on plant sensing and signaling mechanisms and discuss how their structural and functional characteristics lead to resilience or hypersensitivity under conditions of climate change. Plant cells are endowed with arrays of environmental and stress sensors and with internal signals that act as molecular integrators of the multiple constraints of climate change, thus giving rise to potential mechanisms of climate change sensing. Moreover, mechanisms of stress-related information propagation lead to stress memory and acquired stress tolerance that could withstand different scenarios of modifications of stress frequency and intensity. However, optimal functioning of existing sensors, optimal integration of additive constraints and signals, or memory processes can be hampered by conflicting interferences between novel combinations and novel changes in intensity and duration of climate change-related factors. Analysis of these contrasted situations emphasizes the need for future research on the diversity and robustness of plant signaling mechanisms under climate change conditions.

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Photomorphogenic responses to ultraviolet‐B light

Cited by 176 publications

References 145 publications

UV‐B radiation delays flowering time through changes in the PRC2 complex activity and miR156 levels in Arabidopsis thaliana

UV‐B radiation delays flowering time through changes in the PRC2 complex activity and miR156 levels in Arabidopsis thaliana

Using light to improve commercial value

Pivotal roles of environmental sensing and signaling mechanisms in plant responses to climate change

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