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Photomorphogenesis

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https://www.readbyqxmd.com/read/28437590/plant-dual-specificity-tyrosine-phosphorylation-regulated-kinase-optimizes-light-regulated-growth-and-development-in-arabidopsis
#1
Wen-Yu Huang, Yi-Chen Wu, Hsin-Yi Pu, Ying Wang, Geng-Jen Jang, Shu-Hsing Wu
Light controls vegetative and reproductive development of plants. For a plant, sensing the light input properly ensures coordination with the ever-changing environment. Previously, we found that LIGHT-REGULATED WD1 (LWD1) and LWD2 regulate the circadian clock and photoperiodic flowering. Here we identified Arabidopsis YET ANOTHER KINASE1 (AtYAK1), an evolutionarily conserved protein and a member of dual-specificity tyrosine phosphorylation-regulated kinases (DYRKs), as an interacting protein of LWDs. Our study revealed that AtYAK1 is an important regulator for various light responses, including the circadian clock, photomorphogenesis and reproductive development...
April 24, 2017: Plant, Cell & Environment
https://www.readbyqxmd.com/read/28433946/the-activities-of-the-e3-ubiquitin-ligase-cop1-spa-a-key-repressor-in-light-signaling
#2
REVIEW
Ute Hoecker
Light is a critical signal to integrate plant growth and development with the environment. Downstream of photoreceptors, the E3 ubiquitin ligase COP1/SPA is a key repressor of photomorphogenesis which targets many positive regulators of light signaling, mainly transcription factors, for degradation in darkness. In light-grown plants COP1/SPA activity is repressed, allowing light responses to occur. This review provides an overview on our current knowledge on COP1/SPA repressor function, focusing in particular on the roles of the respective protein domains and the mechanisms of light-induced inactivation of COP1/SPA...
April 20, 2017: Current Opinion in Plant Biology
https://www.readbyqxmd.com/read/28426369/hos1-acts-as-a-key-modulator-of-hypocotyl-photomorphogenesis
#3
Ju-Heon Kim, Hyo-Jun Lee, Chung-Mo Park
Plants recognize light as an environmental signal to determine the proper timing of growth and development. In Arabidopsis seedlings, hypocotyl growth is promoted in the dark but suppressed in the light. It is known that the red/far-red light-sensing receptor phytochrome B (phyB) suppresses the function of PHYTOCHROME INTERACTING FACTOR (PIF) transcription factors, which act as photomorphogenic repressors. However, molecular mechanisms underlying the phyB-mediated inhibition of PIF functioning remain unclear...
April 20, 2017: Plant Signaling & Behavior
https://www.readbyqxmd.com/read/28420710/reciprocal-proteasome-mediated-degradation-of-pifs-and-hfr1-underlying-photomorphogenic-development-in-arabidopsis
#4
Xiaosa Xu, Praveen Kumar Kathare, Vinh Ngoc Pham, Qingyun Bu, Andrew Nguyen, Enamul Huq
The phytochrome-mediated regulation of photomorphogenesis under red and far-red light conditions involves both positive and negatively acting factors. The positively acting factors (e.g., HY5/HFR1/LAF1 and others) are degraded in the dark to prevent photomorphogenesis. By contrast, the negatively acting factors (e.g., PIFs) are degraded in response to light to promote photomorphogenesis. Here we show that the negatively acting factor, PIF1 is also degraded in the dark by direct heterodimerization with the positively acting factor, HFR1...
April 18, 2017: Development
https://www.readbyqxmd.com/read/28418582/cop1-conveys-warm-temperature-information-to-hypocotyl-thermomorphogenesis
#5
Young-Joon Park, Hyo-Jun Lee, Jun-Ho Ha, Jae Young Kim, Chung-Mo Park
Plants adjust their architecture to optimize growth and reproductive success under changing climates. Hypocotyl elongation is a pivotal morphogenic trait that is profoundly influenced by light and temperature conditions. While hypocotyl photomorphogenesis has been well characterized at the molecular level, molecular mechanisms underlying hypocotyl thermomorphogenesis remains elusive. Here, we demonstrate that the E3 ubiquitin ligase CONSTITUTIVE PHOTOMORPHOGENIC 1 (COP1) conveys warm temperature signals to hypocotyl thermomorphogenesis...
April 18, 2017: New Phytologist
https://www.readbyqxmd.com/read/28391049/light-regulation-of-pigment-and-photosystem-biosynthesis-in-cyanobacteria
#6
REVIEW
Ming-Yang Ho, Nathan T Soulier, Daniel P Canniffe, Gaozhong Shen, Donald A Bryant
Most cyanobacteria are obligate oxygenic photoautotrophs, and thus their growth and survival is highly dependent on effective utilization of incident light. Cyanobacteria have evolved a diverse set of phytochromes and cyanobacteriochromes (CBCRs) that allow cells to respond to light in the range from ∼300nm to ∼750nm. Together with associated response regulators, these photosensory proteins control many aspects of cyanobacterial physiology and metabolism. These include far-red light photoacclimation (FaRLiP), complementary chromatic acclimation (CCA), low-light photoacclimation (LoLiP), photosystem content and stoichiometry (long-term adaptation), short-term acclimation (state transitions), circadian rhythm, phototaxis, photomorphogenesis/development, and cellular aggregation...
April 6, 2017: Current Opinion in Plant Biology
https://www.readbyqxmd.com/read/28391048/seeing-new-light-recent-insights-into-the-occurrence-and-regulation-of-chromatic-acclimation-in-cyanobacteria
#7
REVIEW
Beronda L Montgomery
Cyanobacteria exhibit a form of photomorphogenesis termed chromatic acclimation (CA), which involves tuning metabolism and physiology to external light cues, with the most readily recognized acclimation being the alteration of pigmentation. Historically, CA has been represented by three types that occur in organisms which synthesize green-light-absorbing phycoerythrin (PE) and red-light-absorbing phycocyanin (PC). The distinct CA types depend upon whether organisms adjust levels of PE (type II), both PE and PC (type III, also complementary chromatic acclimation), or neither (type I) in response to red or green wavelengths...
April 6, 2017: Current Opinion in Plant Biology
https://www.readbyqxmd.com/read/28342864/oslbd37-and-oslbd38-two-class-ii-type-lbd-proteins-are-involved-in-the-regulation-of-heading-date-by-controlling-the-expression-of-ehd1-in-rice
#8
Chaonan Li, Shanshan Zhu, Huan Zhang, Liping Chen, Maohong Cai, Jiachang Wang, Juntao Chai, Fuqing Wu, Zhijun Cheng, Xiuping Guo, Xin Zhang, Jianmin Wan
LATERAL ORGAN BOUNDARIES DOMAIN (LBD) proteins are plant-specific transcription factors which are involved in many biological process of plant development, including lateral organ development, photomorphogenesis, pathogen response, pollen development and plant regeneration. Here, we report new functions of LBD proteins that participate in the regulation of heading date and yield in rice. OsLBD37 and OsLBD38 are two class II type LBD proteins, function as transcriptional activators. Overexpression of OsLBD37 and OsLBD38 separately causes delayed heading date and increased yield...
March 22, 2017: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/28321936/jasmonate-inhibits-cop1-activity-to-suppress-hypocotyl-elongation-and-promote-cotyledon-opening-in-etiolated-arabidopsis-seedlings
#9
Yuyu Zheng, Xuefei Cui, Liang Su, Shuang Fang, Jinfang Chu, Qingqiu Gong, Jianping Yang, Ziqiang Zhu
A germinating seedling undergoes skotomorphogenesis to emerge from the soil and reach for light. During this phase, the cotyledons are closed, and the hypocotyl elongates. Upon exposure to light, the seedling rapidly switches to photomorphogenesis by opening its cotyledons and suppressing hypocotyl elongation. The E3 ubiquitin ligase CONSTITUTIVE PHOTOMORPHOGENIC 1 (COP1) is critical for maintaining skotomorphogenesis. Here, we report that jasmonate (JA) suppresses hypocotyl elongation and stimulates cotyledon opening in etiolated seedlings, partially phenocopying cop1 mutants in the dark...
March 20, 2017: Plant Journal: for Cell and Molecular Biology
https://www.readbyqxmd.com/read/28292897/inhibition-of-atherogenesis-by-the-cop9-signalosome-subunit-5-in-vivo
#10
Yaw Asare, Miriam Ommer, Florence A Azombo, Setareh Alampour-Rajabi, Marieke Sternkopf, Maryam Sanati, Marion J Gijbels, Corinna Schmitz, Dzmitry Sinitski, Pathricia V Tilstam, Hongqi Lue, André Gessner, Denise Lange, Johannes A Schmid, Christian Weber, Martin Dichgans, Joachim Jankowski, Ruggero Pardi, Menno P J de Winther, Heidi Noels, Jürgen Bernhagen
Constitutive photomorphogenesis 9 (COP9) signalosome 5 (CSN5), an isopeptidase that removes neural precursor cell-expressed, developmentally down-regulated 8 (NEDD8) moieties from cullins (thus termed "deNEDDylase") and a subunit of the cullin-RING E3 ligase-regulating COP9 signalosome complex, attenuates proinflammatory NF-κB signaling. We previously showed that CSN5 is up-regulated in human atherosclerotic arteries. Here, we investigated the role of CSN5 in atherogenesis in vivo by using mice with myeloid-specific Csn5 deletion...
March 28, 2017: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/28292892/noncanonical-role-of-arabidopsis-cop1-spa-complex-in-repressing-bin2-mediated-pif3-phosphorylation-and-degradation-in-darkness
#11
Jun-Jie Ling, Jian Li, Danmeng Zhu, Xing Wang Deng
The E3 ligase CONSTITUTIVELY PHOTOMORPHOGENIC 1 (COP1) has been known to mediate key signaling factors for degradation via the ubiquitin/26S proteasome pathway in both plants and animals. Here, we report a noncanonical function of Arabidopsis COP1, the central repressor of photomorphogenesis, in the form of a COP1/ SUPPRESSOR of phyA-105 (SPA) complex. We show that the COP1/SPA complex associates with and stabilizes PHYTOCHROME INTERACTING FACTOR 3 (PIF3) to repress photomorphogenesis in the dark. We identify the GSK3-like kinase BRASSINOSTEROID-INSENSITIVE 2 (BIN2) as a kinase of PIF3, which induces PIF3 degradation via 26S proteasome during skotomorphogenesis...
March 28, 2017: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/28216039/molecular-cloning-and-function-analysis-of-clcry1a-and-clcry1b-two-genes-in-chrysanthemum-lavandulifolium-that-play-vital-roles-in-promoting-floral-transition
#12
Liwen Yang, Jianxin Fu, Shuai Qi, Yan Hong, He Huang, Silan Dai
Cryptochrome (CRY), a vital photoreceptor which mediates light signals, controls photomorphogenesis in higher plants. However, the function of CRY in mediating light to regulate growth and development of ornamental plants is still unclear. In this study, we identified two CRY1 homologous genes, ClCRY1a and ClCRY1b, from Chrysanthemum lavandulifolium, a diploid wild chrysanthemum species. Expression analysis demonstrated that these two ClCRY1 genes showed the highest expression levels in seedlings leaves that were transferred to short day (SD) conditions for eight days...
February 16, 2017: Gene
https://www.readbyqxmd.com/read/28207924/seed-specific-transcription-factor-hsfa9-links-late-embryogenesis-and-early-photomorphogenesis
#13
Pilar Prieto-Dapena, Concepción Almoguera, José-María Personat, Francisco Merchan, Juan Jordano
HSFA9 is a seed-specific transcription factor that in sunflower (Helianthus annuus) is involved in desiccation tolerance and longevity. Here we show that the constitutive overexpression of HSFA9 in tobacco (Nicotiana tabacum) seedlings attenuated hypocotyl growth under darkness and accelerated the initial photosynthetic development. Plants overexpressing HSFA9 increased accumulation of carotenoids, chlorophyllide, and chlorophyll, and displayed earlier unfolding of the cotyledons. HSFA9 enhanced phytochrome-dependent light responses, as shown by an intensified hypocotyl length reduction after treatments with continuous far-red or red light...
February 1, 2017: Journal of Experimental Botany
https://www.readbyqxmd.com/read/28183154/photomorphogenic-responses-to-ultraviolet-b-light
#14
REVIEW
Gareth I Jenkins
Exposure to ultraviolet B (UV-B) light regulates numerous aspects of plant metabolism, morphology and physiology through the differential expression of hundreds of genes. Photomorphogenic responses to UV-B are mediated by the photoreceptor UV RESISTANCE LOCUS8 (UVR8). Considerable progress has been made in understanding UVR8 action: the structural basis of photoreceptor function, how interaction with CONSTITUTIVELY PHOTOMORPHOGENIC 1 initiates signaling and how REPRESSOR OF UV-B PHOTOMORPHOGENESIS proteins negatively regulate UVR8 action...
February 9, 2017: Plant, Cell & Environment
https://www.readbyqxmd.com/read/28123107/characterization-of-phytochrome-interacting-factors-from-the-moss-physcomitrella-patens-illustrates-conservation-of-phytochrome-signaling-modules-in-land-plants
#15
Anja Possart, Tengfei Xu, Inyup Paik, Sebastian Hanke, Sarah Keim, Helen-Maria Hermann, Luise Wolf, Manuel Hiß, Claude Becker, Enamul Huq, Stefan A Rensing, Andreas Hiltbrunner
Across the plant kingdom, phytochrome (PHY) photoreceptors play an important role during adaptive and developmental responses to light. In Arabidopsis thaliana, light-activated PHYs accumulate in the nucleus, where they regulate downstream signaling components, such as phytochrome interacting factors (PIFs). PIFs are transcription factors that act as repressors of photomorphogenesis; their inhibition by PHYs leads to substantial changes in gene expression. The nuclear function of PHYs, however, has so far been investigated in only a few non-seed plants...
February 2017: Plant Cell
https://www.readbyqxmd.com/read/28076780/det1-and-hy5-control-pif4-mediated-thermosensory-elongation-growth-through-distinct-mechanisms
#16
Sreeramaiah N Gangappa, S Vinod Kumar
Plant growth and development are defined by environmental cues. The transcription factor PHYTOCHROME INTERACTING FACTOR 4 (PIF4) is the central signaling hub that integrates environmental cues, including light and temperature, to regulate growth and development. The thermosensory mechanisms controlling the PIF4-mediated temperature response, and its integration with other environmental responses, remain poorly understood. DE-ETIOLATED 1 (DET1) and CONSTITUTIVE PHOTOMORPHOGENESIS 1 (COP1), key regulators of light signaling, have been proposed to control thermosensory growth by transcriptional regulation of PIF4, through ELONGATED HYPOCOTYL 5 (HY5)...
January 10, 2017: Cell Reports
https://www.readbyqxmd.com/read/28073698/ectopic-expression-of-an-apple-cytochrome-p450-gene-mdcypm1-negatively-regulates-plant-photomorphogenesis-and-stress-response-in-arabidopsis
#17
Jian-Ping An, Rui Li, Feng-Jia Qu, Chun-Xiang You, Xiao-Fei Wang, Yu-Jin Hao
Cytochrome P450s play an important role in plant growth and are involved in multiple stresses response. However, little is known about the functions of cytochrome P450s in apple. Here, a Malus × domestica cytochrome P450 monooxygenase 1 gene, MdCYPM1, was identified and subsequently cloned from apple 'Gala' (Malus × domestica). To verify the functions of MdCYPM1, we generated transgenic Arabidopsis plants expressing the apple MdCYPM1 gene under the control of the Cauliflower mosaic virus 35S promoter...
January 29, 2017: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/28011868/chemical-induced-inhibition-of-blue-light-mediated-seedling-development-caused-by-disruption-of-upstream-signal-transduction-involving-cryptochromes-in-arabidopsis-thaliana
#18
Wen-Dee Ong, Emiko Okubo-Kurihara, Yukio Kurihara, Setsuko Shimada, Yuko Makita, Mika Kawashima, Kaori Honda, Yasumitsu Kondoh, Nobumoto Watanabe, Hiroyuki Osada, Sean R Cutler, Kumar Sudesh, Minami Matsui
Plants have a remarkable ability to perceive and respond to various wavelengths of light and initiate regulation of different cascades of light signaling and molecular components. While the perception of red light and the mechanisms of its signaling involving phytochromes are largely known, knowledge of the mechanisms of blue light signaling is still limited. Chemical genetics involves the use of diverse small active or synthetic molecules to evaluate biological processes. By combining chemicals and analyzing the effects they have on plant morphology, we identified a chemical, 3-bromo-7-nitroindazole (3B7N), that promotes hypocotyl elongation of wild-type Arabidopsis only under continuous blue light...
December 22, 2016: Plant & Cell Physiology
https://www.readbyqxmd.com/read/28010046/development-of-transgenic-crops-based-on-photo-biotechnology
#19
REVIEW
Markkandan Ganesan, Hyo-Yeon Lee, Jeong-Il Kim, Pill-Soon Song
The phenotypes associated with plant photomorphogenesis such as the suppressed shade avoidance response and de-etiolation offer the potential for significant enhancement of crop yields. Of many light signal transducers and transcription factors involved in the photomorphogenic responses of plants, this review focuses on the transgenic overexpression of the photoreceptor genes at the uppermost stream of the signaling events, particularly phytochromes, crytochromes and phototropins as the transgenes for the genetic engineering of crops with improved harvest yields...
December 23, 2016: Plant, Cell & Environment
https://www.readbyqxmd.com/read/27997837/photomorphogenesis-plants-feel-blue-in-the-shade
#20
Keara A Franklin
Plants integrate multiple environmental signals to detect and avoid shading from neighbouring vegetation. Two new studies highlight the importance of blue light in the regulation of stem elongation and bending during shade escape.
December 19, 2016: Current Biology: CB
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