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Photomorphogenesis

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https://www.readbyqxmd.com/read/28805486/cop1-integrates-light-signals-to-rop2-for-cell-cycle-activation
#1
Wenguo Cai, Xiaojuan Li, Yanlin Liu, Yaowei Wang, Yue Zhou, Tongda Xu, Yan Xiong
The exquisite regulation of cell division at the shoot apex according to the external environmental cues enables plants to adapt the ever-changing environment. We have recently shown that light direct signaling and carbohydrate (sugar) energy signaling are both essential for the activation of cell division at the shoot apex. Light is converted to auxin signal to activate small GTPase 2 (ROP2). Subsequently, the activated ROP2 directly interacts with Target of Rapamycin (TOR) protein kinase, a pivotal regulator of cell division, to promotes its kinase activity...
August 14, 2017: Plant Signaling & Behavior
https://www.readbyqxmd.com/read/28771755/pickle-chromatin-remodeling-factor-controls-thermosensory-hypocotyl-growth-of-arabidopsis
#2
Ping Zha, Yanjun Jing, Gang Xu, Rongcheng Lin
Temperature is a major signal that governs plant distribution and shapes plant growth. High ambient temperature promotes plant thermomorphogenesis without significant induction of heat-stress responses. Although much progress of warm temperature-mediated plant growth have been made during recent years, the thermomorphogenic signaling pathway is not well understood. We previously revealed that PICKLE (PKL), an ATP-dependent chromatin remodeling factor, negatively controls photomorphogenesis in Arabidopsis thaliana...
August 2, 2017: Plant, Cell & Environment
https://www.readbyqxmd.com/read/28760995/spf45-related-splicing-factor-for-phytochrome-signaling-promotes-photomorphogenesis-by-regulating-pre-mrna-splicing-in-arabidopsis
#3
Ruijiao Xin, Ling Zhu, Patrice A Salomé, Estefania Mancini, Carine M Marshall, Frank G Harmon, Marcelo J Yanovsky, Detlef Weigel, Enamul Huq
Light signals regulate plant growth and development by controlling a plethora of gene expression changes. Posttranscriptional regulation, especially pre-mRNA processing, is a key modulator of gene expression; however, the molecular mechanisms linking pre-mRNA processing and light signaling are not well understood. Here we report a protein related to the human splicing factor 45 (SPF45) named splicing factor for phytochrome signaling (SFPS), which directly interacts with the photoreceptor phytochrome B (phyB)...
July 31, 2017: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/28738828/unraveling-multifaceted-contributions-of-small-regulatory-rnas-to-photomorphogenic-development-in-arabidopsis
#4
Meng-Chun Lin, Huang-Lung Tsai, Sim-Lin Lim, Shih-Tong Jeng, Shu-Hsing Wu
BACKGROUND: Post-transcriptional control of gene expression mediated by small regulatory RNAs (sRNAs) is vital for growth and development of diverse organisms. The biogenesis of sRNAs is regulated by both positive and negative regulators known to regulate photomorphogenic development. Two microRNAs (miRNAs), miR157 and miR319, also regulate photomorphogenesis. However, genome-wide profiling of sRNAs and their regulation of target genes during photomorphogenesis has been missing. We provide a comprehensive view of sRNA-controlled gene expression in this developmental process...
July 24, 2017: BMC Genomics
https://www.readbyqxmd.com/read/28736168/light-dependent-degradation-of-pif3-by-scf-ebf1-2-promotes-a-photomorphogenic-response-in-arabidopsis
#5
Jie Dong, Weimin Ni, Renbo Yu, Xing Wang Deng, Haodong Chen, Ning Wei
Plant seedlings emerging from darkness into the light environment undergo photomorphogenesis, which enables autotrophic growth with optimized morphology and physiology. During this transition, plants must rapidly remove photomorphogenic repressors accumulated in the dark. Among them is PHYTOCHROME-INTERACTING FACTOR 3 (PIF3), a key transcription factor promoting hypocotyl growth. Here we report that, in response to light activation of phytochrome photoreceptors, EIN3-BINDING F BOX PROTEINs (EBFs) 1 and 2 mediate PIF3 protein degradation in a manner dependent on light-induced phosphorylation of PIF3...
July 18, 2017: Current Biology: CB
https://www.readbyqxmd.com/read/28720596/elongator-regulates-hypocotyl-growth-in-darkness-and-during-photomorphogenesis
#6
Magdalena Woloszynska, Olimpia Gagliardi, Filip Vandenbussche, Steven De Groeve, Luis Alonso Baez, Pia Neyt, Sabine Le Gall, Jorge Fung, Paloma Mas, Dominique Van Der Straeten, Mieke Van Lijsebettens
Elongator promotes RNA polymerase II-mediated transcript elongation through epigenetic activities such as histone acetylation. Elongator regulates growth, development, immune response, sensitivity to drought and abscisic acid. We demonstrate that elo mutants exhibit defective hypocotyl elongation but have a normal apical hook in darkness and are hyposensitive to light during photomorphogenesis. These elo phenotypes are supported by transcriptome changes, i.e. downregulation of circadian clock components, positive regulators of skoto- or photomorphogenesis, hormonal pathways and cell wall biogenesis-related factors...
July 18, 2017: Journal of Cell Science
https://www.readbyqxmd.com/read/28705537/multiple-routes-of-light-signaling-during-root-photomorphogenesis
#7
REVIEW
Hyo-Jun Lee, Young-Joon Park, Jun-Ho Ha, Ian T Baldwin, Chung-Mo Park
Plants dynamically adjust their architecture to optimize growth and performance under fluctuating light environments, a process termed photomorphogenesis. A variety of photomorphogenic responses have been studied extensively in the shoots, where diverse photoreceptors and signaling molecules have been functionally characterized. Notably, accumulating evidence demonstrates that the underground roots also undergo photomorphogenesis, raising the question of how roots perceive and respond to aboveground light. Recent findings indicate that root photomorphogenesis is mediated by multiple signaling routes, including shoot-to-root transmission of mobile signaling molecules, direct sensing of light by the roots, and light channeling through the plant body...
July 10, 2017: Trends in Plant Science
https://www.readbyqxmd.com/read/28687557/a-pif1-pif3-hy5-bbx23-transcription-factor-cascade-affects-photomorphogenesis
#8
Xinyu Zhang, Junling Huai, Fangfang Shang, Gang Xu, Weijiang Tang, Yanjun Jing, Rongcheng Lin
Light signaling plays an essential role in controlling higher plants' early developmental process termed as photomorphogenesis. Transcriptional regulation is a vital mechanism that is orchestrated by transcription factors and other regulatory proteins working in concert to finely tune gene expression. Although many transcription factors/regulators have been characterized in the light-signaling pathway, their interregulation remains largely unknown. Here, we show that PHYTOCHROME-INTERACTING FACTOR3 (PIF3) and PIF1 transcription factors directly bind to the regulatory regions of ELONGATED HYPOCOTYL5 (HY5) and a B-box gene BBX23 and activate their expression in Arabidopsis (Arabidopsis thaliana)...
August 2017: Plant Physiology
https://www.readbyqxmd.com/read/28667107/the-two-cryptochrome-photolyase-family-proteins-fulfill-distinct-roles-in-dna-photorepair-and-regulation-of-conidiation-in-the-gray-mold-fungus-botrytis-cinerea
#9
Kim C Cohrs, Julia Schumacher
The plant pathogenic Leotiomycete Botrytis cinerea is known for the strict regulation of its asexual differentiation programs by the environmental light conditions. Sclerotia are formed in constant darkness, black/near-UV (NUV) light induces conidiation and blue light represses both differentiation programs. Sensing of black/NUV light is attributed to proteins of the cryptochrome/photolyase family (CPF). To elucidate the molecular basis of the photoinduction of conidiation, we functionally characterized the two CPF proteins encoded in the genome of B...
June 30, 2017: Applied and Environmental Microbiology
https://www.readbyqxmd.com/read/28663343/fine-mapping-transcriptome-analysis-and-marker-development-for-y2-the-gene-that-conditions-beta-carotene-accumulation-in-carrot-daucus-carota-l
#10
Shelby Ellison, Douglas Senalik, Hamed Bostan, Massimo Iorizzo, Philipp Simon
Domesticated carrots, Daucus carota subsp. sativus, are the richest source of beta-carotene in the US diet, which when consumed is converted into vitamin A, an essential component of eye health and immunity. The Y2 locus plays a significant role in beta-carotene accumulation in carrot roots, but a candidate gene has not been identified. To advance our understanding of this locus, the genetic basis of beta-carotene accumulation was explored by utilizing an advanced mapping population, transcriptome analysis, and nucleotide diversity in diverse carrot accessions with varying levels of beta-carotene...
June 29, 2017: G3: Genes—Genomes—Genetics
https://www.readbyqxmd.com/read/28584104/phosphorylation-and-negative-regulation-of-constitutively-photomorphogenic-1-by-pinoid-in-arabidopsis
#11
Fang Lin, Dongqing Xu, Yan Jiang, Haodong Chen, Liumin Fan, Magnus Holm, Xing Wang Deng
CONSTITUTIVELY PHOTOMORPHOGENIC 1 (COP1) plays crucial roles in various cellular processes via its E3 ubiquitin ligase activity in organisms, ranging from fungi to humans. As a key component in regulating various biological events, COP1 itself is precisely controlled at multiple layers. Here, we report a negative regulator of COP1, PINOID (PID), which positively mediates photomorphogenic development. Specifically, PID genetically and physically interacts with COP1 and directly phosphorylates COP1 at Ser20. As a result, this posttranslational modification serves to repress COP1 activity and promote photomorphogenesis...
June 20, 2017: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/28580356/fungal-histidine-phosphotransferase-plays-a-crucial-role-in-photomorphogenesis-and-pathogenesis-in-magnaporthe-oryzae
#12
Varsha C Mohanan, Pinal M Chandarana, Bharat B Chattoo, Rajesh N Patkar, Johannes Manjrekar
Two-component signal transduction (TCST) pathways play crucial roles in many cellular functions such as stress responses, biofilm formation, and sporulation. The histidine phosphotransferase (HPt), which is an intermediate phosphotransfer protein in a two-component system, transfers a phosphate group to a phosphorylatable aspartate residue in the target protein(s), and up-regulates stress-activated MAP kinase cascades. Most fungal genomes carry a single copy of the gene coding for HPt, which are potential antifungal targets...
2017: Frontiers in Chemistry
https://www.readbyqxmd.com/read/28559907/shb1-hy1-alleviates-excess-boron-stress-by-increasing-bor4-expression-level-and-maintaining-boron-homeostasis-in-arabidopsis-roots
#13
Qiang Lv, Lei Wang, Jin-Zheng Wang, Peng Li, Yu-Li Chen, Jing Du, Yi-Kun He, Fang Bao
Boron is an essential mineral nutrient for higher plant growth and development. However, excessive amounts of boron can be toxic. Here, we report on the characterization of an Arabidopsis mutant, shb1 (sensitive to high-level of boron 1), which exhibits hypersensitivity to excessive boron in roots. Positional cloning demonstrated that the shb1 mutant bears a point mutation in a gene encoding a heme oxygenase 1 (HO1) corresponding to the HY1 gene involved in photomorphogenesis. The transcription level of the SHB1/HY1 gene in roots is up-regulated under excessive boron stimulation...
2017: Frontiers in Plant Science
https://www.readbyqxmd.com/read/28552939/genome-wide-survey-of-b-box-proteins-in-potato-solanum-tuberosum-identification-characterization-and-expression-patterns-during-diurnal-cycle-etiolation-and-de-etiolation
#14
Urszula Talar, Agnieszka Kiełbowicz-Matuk, Jagoda Czarnecka, Tadeusz Rorat
Plant B-box domain proteins (BBX) mediate many light-influenced developmental processes including seedling photomorphogenesis, seed germination, shade avoidance and photoperiodic regulation of flowering. Despite the wide range of potential functions, the current knowledge regarding BBX proteins in major crop plants is scarce. In this study, we identify and characterize the StBBX gene family in potato, which is composed of 30 members, with regard to structural properties and expression profiles under diurnal cycle, etiolation and de-etiolations...
2017: PloS One
https://www.readbyqxmd.com/read/28536102/spa-proteins-affect-the-subcellular-localization-of-cop1-in-the-cop1-spa-ubiquitin-ligase-complex-during-photomorphogenesis
#15
Martin Balcerowicz, Konstantin Kerner, Christian Schenkel, Ute Hoecker
The Arabidopsis (Arabidopsis thaliana) COP1/SPA ubiquitin ligase is a central repressor that suppresses light signaling in darkness by targeting positive regulators of the light response, mainly transcription factors, for degradation. Light inactivates COP1/SPA, in part by excluding COP1 from the nucleus. SPA proteins are essential cofactors of COP1, but their exact role in the COP1/SPA complex is thus far unknown. To unravel a potential role of SPA proteins in COP1 nucleocytoplasmic partitioning, we monitored the subcellular localization of COP1 in a spa1234 quadruple mutant (spaQn)...
July 2017: Plant Physiology
https://www.readbyqxmd.com/read/28516036/transcriptome-analysis-of-carica-papaya-embryogenic-callus-upon-de-etiolated-1-det1-gene-suppression
#16
Diyana Jamaluddin, Normah Mohd Noor, Hoe-Han Goh
Papaya is considered to be one of the most nutritional fruits. It is rich in vitamins, carotenoids, flavonoids and other phytonutrient which function as antioxidant in our body [1]. Previous studies revealed that the suppression of a negative regulator gene in photomorphogenesis, De-etiolated 1 (DET1) can improve the phytonutrient in tomato and canola without affecting the fruit quality [2], [3]. This report contains the experimental data on high-throughput 3' mRNA sequencing of transformed papaya callus upon DET1 gene suppression...
June 2017: Genomics Data
https://www.readbyqxmd.com/read/28500697/light-induced-conformational-changes-in-the-plant-cryptochrome-photolyase-homology-region-resolved-by-selective-isotope-labeling-and-infrared-spectroscopy
#17
Constanze Sommer, Marina S Dietz, Thomas Patschkowski, Tilo Mathes, Tilman Kottke
Plant cryptochromes are photoreceptors that regulate flowering, circadian rhythm and photomorphogenesis in response to blue and UV-A light. It has been demonstrated that the oxidized flavin cofactor is photoreduced to the neutral radical state via separate electron and proton transfer. Conformational changes have been found in the C-terminal extension, but few studies have addressed the changes in secondary structure in the sensory photolyase homology region (PHR). Here, we investigated the PHR of the plant cryptochrome from the green alga Chlamydomonas reinhardtii by light-induced infrared difference spectroscopy in combination with global (13) C and (15) N isotope labeling...
May 2017: Photochemistry and Photobiology
https://www.readbyqxmd.com/read/28500288/light-perception-in-aerial-tissues-enhances-dwf4-accumulation-in-root-tips-and-induces-root-growth
#18
Jun Sakaguchi, Yuichiro Watanabe
Many attempts have been made to characterize the activities of brassinosteroids (BRs), which are important plant hormones. The crosstalk between light perception and the BR signalling pathway has been extensively studied regarding its effects on photomorphogenesis, especially in elongating etiolated hypocotyls. In contrast, how and where the light induces BR biosynthesis remain uncharacterized. DWF4 is one of the main enzymes involved in the BR biosynthesis pathway in Arabidopsis thaliana. We established DWF4-GUS A...
May 12, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28461270/mass-spectrometric-analyses-reveal-a-central-role-for-ubiquitylation-in-remodeling-the%C3%A2-arabidopsis-proteome-during-photomorphogenesis
#19
Victor Aguilar-Hernández, Do-Young Kim, Robert J Stankey, Mark Scalf, Lloyd M Smith, Richard D Vierstra
The switch from skotomorphogenesis to photomorphogenesis is a key developmental transition in the life of seed plants. While much of the underpinning proteome remodeling is driven by light-induced changes in gene expression, the proteolytic removal of specific proteins by the ubiquitin-26S proteasome system is also likely paramount. Through mass spectrometric analysis of ubiquitylated proteins affinity-purified from etiolated Arabidopsis seedlings before and after red-light irradiation, we identified a number of influential proteins whose ubiquitylation status is modified during this switch...
June 5, 2017: Molecular Plant
https://www.readbyqxmd.com/read/28437590/plant-dual-specificity-tyrosine-phosphorylation-regulated-kinase-optimizes-light-regulated-growth-and-development-in-arabidopsis
#20
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
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