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Anthocyanin, transcription

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https://www.readbyqxmd.com/read/28640973/production-of-red-flowered-oilseed-rape-via-the-ectopic-expression-of-orychophragmus-violaceus-ovpap2
#1
Wenqin Fu, Daozong Chen, Qi Pan, Fengfeng Li, Zhigang Zhao, Xianhong Ge, Zaiyun Li
Oilseed rape (Brassica napus L.), which has yellow flowers, is both an important oil crop and a traditional tourism resource in China, whereas the Orychophragmus violaceus, which has purple flowers, likely possesses a candidate gene or genes to alter the flower color of oilseed rape. A previously established B. napus line has a particular pair of O. violaceus chromosomes (M4) and exhibits slightly red petals. In this study, the transcriptomic analysis of M4, B. napus (H3), and O. violaceus with purple petals (OvP) and with white petals (OvW) revealed that most anthocyanin biosynthesis genes were up-regulated in both M4 and OvP...
June 22, 2017: Plant Biotechnology Journal
https://www.readbyqxmd.com/read/28634482/whole-plant-temperature-manipulation-affects-flavonoid-metabolism-and-the-transcriptome-of-grapevine-berries
#2
Chiara Pastore, Silvia Dal Santo, Sara Zenoni, Nushin Movahed, Gianluca Allegro, Gabriele Valentini, Ilaria Filippetti, Giovanni Battista Tornielli
Among environmental factors, temperature is the one that poses serious threats to viticulture in the present and future scenarios of global climate change. In this work, we evaluated the effects on berry ripening of two thermal regimes, imposed from veraison to harvest. Potted vines were grown in two air-conditioned greenhouses with High Temperature (HT) and Low Temperature (LT) regimes characterized by 26 and 21°C as average and 42 and 35°C as maximum air daily temperature, respectively. We conducted analyses of the main berry compositional parameters, berry skin flavonoids and berry skin transcriptome on HT and LT berries sampled during ripening...
2017: Frontiers in Plant Science
https://www.readbyqxmd.com/read/28622347/rna-guided-transcriptional-activation-via-crispr-dcas9-mimics-overexpression-phenotypes-in-arabidopsis
#3
Jong-Jin Park, Emma Dempewolf, Wenzheng Zhang, Zeng-Yu Wang
Clustered regularly interspaced short palindromic repeats (CRISPR) and the CRISPR associated protein 9 (Cas9) system allows effective gene modification through RNA-guided DNA targeting. The Cas9 has undergone a series of functional alterations from the original active endonuclease to partially or completely deactivated Cas9. The catalytically deactivated Cas9 (dCas9) offers a platform to regulate transcriptional expression with the addition of activator or repressor domains. We redesigned a CRISPR/Cas9 activation system by adding the p65 transactivating subunit of NF-kappa B and a heat-shock factor 1 (HSF) activation domain to dCas9 bound with the VP64 (tetramer of VP16) activation domain for application in plants...
2017: PloS One
https://www.readbyqxmd.com/read/28611922/the-bzip-transcription-factor-mdhy5-regulates-anthocyanin-accumulation-and-nitrate-assimilation-in-apple
#4
Jian-Ping An, Feng-Jia Qu, Ji-Fang Yao, Xiao-Na Wang, Chun-Xiang You, Xiao-Fei Wang, Yu-Jin Hao
The basic leucine zipper (bZIP) transcription factor HY5 plays a multifaceted role in plant growth and development. Here the apple MdHY5 gene was cloned based on its homology with Arabidopsis HY5. Expression analysis demonstrated that MdHY5 transcription was induced by light and abscisic acid treatments. Electrophoretic mobility shift assays and transient expression assays subsequently showed that MdHY5 positively regulated both its own transcription and that of MdMYB10 by binding to E-box and G-box motifs, respectively...
2017: Horticulture Research
https://www.readbyqxmd.com/read/28597434/ectopic-expression-of-lc-differentially-regulated-anthocyanin-biosynthesis-in-the-floral-parts-of-tobacco-nicotiana-tobacum-l-plants
#5
Zong-An Huang, Ting Zhao, Ning Wang, Shu-Song Zheng
BACKGROUND: Anthocyanins are the conspicuous pigments of flowering plants and participate in several aspects of plant development and defense, such as seeds and pollens dispersal. Leaf colour (Lc) is the first basic/helix-loop-helix (bHLH) transcription factor controlling anthocyanin biosynthesis isolated from maize (Zea mays L.). Ectopic expression of maize Lc enhanced anthocyanin biosynthesis in many plants including tobacco (Nicotiana tobacum L.). However, the molecular regulatory mechanism of anthocyanin biosynthesis in the different floral parts of tobacco remains largely unknown...
December 2016: Botanical Studies (Taipei, Taiwan)
https://www.readbyqxmd.com/read/28588129/complete-biosynthesis-of-anthocyanins-using-e-coli-polycultures
#6
J Andrew Jones, Victoria R Vernacchio, Shannon M Collins, Abhijit N Shirke, Yu Xiu, Jacob A Englaender, Brady F Cress, Catherine C McCutcheon, Robert J Linhardt, Richard A Gross, Mattheos A G Koffas
Fermentation-based chemical production strategies provide a feasible route for the rapid, safe, and sustainable production of a wide variety of important chemical products, ranging from fuels to pharmaceuticals. These strategies have yet to find wide industrial utilization due to their inability to economically compete with traditional extraction and chemical production methods. Here, we engineer for the first time the complex microbial biosynthesis of an anthocyanin plant natural product, starting from sugar...
June 6, 2017: MBio
https://www.readbyqxmd.com/read/28587991/controlled-water-deficit-during-ripening-affects-proanthocyanidin-synthesis-concentration-and-composition-in-cabernet-sauvignon-grape-skins
#7
Alejandro Cáceres-Mella, M Inmaculada Talaverano, Luis Villalobos-González, Camila Ribalta-Pizarro, Claudio Pastenes
The influence of controlled water deficit on the phenolic composition and gene expression of VvLAR2, VvMYBPA1, VvMYBPA2 and VvMYB4a in Cabernet Sauvignon grape skins throughout ripening was investigated. The assay was carried out on own-rooted Vitis vinifera plants cv. Cabernet Sauvignon in a commercial vineyard from veraison until commercial harvest. Three irrigation regimes were used from veraison until harvest with the following treatments: T1: 3.6 mm day(-1); T2: 1.8 mm day(-1) and T3: 0.3 mm day(-1)...
May 26, 2017: Plant Physiology and Biochemistry: PPB
https://www.readbyqxmd.com/read/28587075/identification-of-anthocyanin-composition-and-functional-analysis-of-an-anthocyanin-activator-in-solanum-nigrum-fruits
#8
Shaoli Wang, Zhaohui Chu, Mingxing Ren, Ru Jia, Changbao Zhao, Dan Fei, Hao Su, Xiaoqi Fan, Xiaotian Zhang, Yang Li, Yingzi Wang, Xinhua Ding
Solanum nigrum fruits have been conventionally used in beverages due to their nutritional substances such as minerals, vitamins, amino acids, proteins, sugars, polyphenols, and anthocyanins. The characterization of components and regulatory mechanism of anthocyanins in S. nigrum fruits have rarely been reported. In this study, we determined that the peel and flesh of S. nigrum fruits shared similar HPLC profiles but different contents and total antioxidant activities for anthocyanins. After an efficient purification method, mainly including extraction with pH 1...
May 25, 2017: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/28577387/a-double-knockout-mutant-of-acyl-glucose-dependent-anthocyanin-glucosyltransferase-genes-in-delphinium-grandiflorum
#9
Izumi Ishii, Kimitoshi Sakaguchi, Kazuyoshi Fujita, Yoshihiro Ozeki, Taira Miyahara
Blue coloration in delphinium flowers arises from 7-polyacylated anthocyanins which are modified alternately with acyl and glucosyl residues at the 7 position of the aglycone. Previously, we identified two independent genes for acyl-glucose-dependent anthocyanin 7-(6-(p-hydroxybenzoyl)-glucoside) glucosyltransferases (AA7BG-GT); recombinant proteins from the two cDNAs were produced in Escherichia coli and showed AA7BG-GT activity in vitro. Here, a double knockout mutant of both genes was found to lack modification of the second glucosyl residue following further acyl and glucosyl modifications...
May 19, 2017: Journal of Plant Physiology
https://www.readbyqxmd.com/read/28575507/advances-in-the-myb-bhlh-wd-repeat-mbw-pigment-regulatory-model-addition-of-a-wrky-factor-and-co-option-of-an-anthocyanin-myb-for-betalain-regulation
#10
Alan Lloyd, Austen Brockman, Lyndsey Aguirre, Annabelle Campbell, Alex Bean, Araceli Cantero, Antonio Gonzalez
Flavonoids are secondary metabolites derived from the general phenylpropanoid pathway and are widespread throughout the plant kingdom. The functions of flavonoids are diverse, including defense against phytopathogens, protection against UV light damage and oxidative stress, regulation of auxin transport and allelopathy. One of the most conspicuous functions of flavonoids has long attracted the attention of pollinators and scientist alike: the vivid shades of red, pink, orange, blue and purple on display in the flowers of angiosperms...
May 30, 2017: Plant & Cell Physiology
https://www.readbyqxmd.com/read/28559900/isoflavone-malonyltransferases-gmimat1-and-gmimat3-differently-modify-isoflavone-glucosides-in-soybean-glycine-max-under-various-stresses
#11
Muhammad Z Ahmad, Penghui Li, Junjie Wang, Naveed Ur Rehman, Jian Zhao
Malonylated isoflavones are the major forms of isoflavonoids in soybean plants, the genes responsible for their biosyntheses are not well understood, nor their physiological functions. Here we report a new benzylalcohol O-acetyltransferase, anthocyanin O-hydroxycinnamoyltransferase, anthranilate N-hydroxycinnamoyl/benzoyltransferase, deacetylvindoline 4-O-acetyltransferase (BAHD) family isoflavone glucoside malonyltransferase GmIMaT1, and GmIMaT3, which is allelic to the previously characterized GmMT7 and GmIF7MaT...
2017: Frontiers in Plant Science
https://www.readbyqxmd.com/read/28523445/ptrmyb57-contributes-to-the-negative-regulation-of-anthocyanin-and-proanthocyanidin-biosynthesis-in-poplar
#12
Shuzhen Wan, Chaofeng Li, Xiaodong Ma, Keming Luo
A novel R2R3 MYB transcription factor PtrMYB57 interacted with bHLH131 and PtrTTG1 to form the MBW complex and negatively regulated the biosynthesis of both anthocyanins and PAs in poplar. R2R3-MYB transcription factors (TFs) are important regulators of secondary metabolite biosynthesis in woody species. A series of R2R3-MYB TFs involved in anthocyanin and proanthocyanidin (PA) biosynthesis have been identified in poplar. In this study, we report the identification and characterization of a subgroup 4 MYB member PtrMYB57, which contains a repressor domain (LxLxL) at the C-terminal end...
May 18, 2017: Plant Cell Reports
https://www.readbyqxmd.com/read/28520776/proteomic-analysis-of-tea-plants-camellia-sinensis-with-purple-young-shoots-during-leaf-development
#13
Qiongqiong Zhou, Zhidan Chen, Jinwook Lee, Xinghui Li, Weijiang Sun
Tea products made from purple leaves are highly preferred by consumers due to the health benefits. This study developed a proteome reference map related to color changes during leaf growth in tea (Camellia sinensis) plant with purple young shoots using two-dimensional electrophoresis (2-DE). Forty-six differentially expressed proteins were detected in the gel and successfully identified by using MALDI-TOF/TOF-MS. The pronounced changes in the proteomic profile between tender purple leaves (TPL) and mature green leaves (MGL) included: 1) the lower activity of proteins associated with CO2 assimilation, energy metabolism and photo flux efficiency and higher content of anthocyanins in TPL than those in MGL may protect tender leaves against photo-damage; 2) the higher abundance of chalcone synthase (CHS), chalcone isomerase (CHI) and flavonol synthase (FLS) likely contributes to the synthesis of anthocyanins, catechins and flavonols in TPL tissues; 3) higher abundance of stress response proteins, such as glutathione S-transferases (GST) and phospholipid hydroperoxide glutathione peroxidase (PHGPx), could enhance the tolerance of TPL tissues to adverse condition in; and 4) the increased abundance of proteins related to protein synthesis, nucleic acids and cell wall proteins should be beneficial for the proliferation and expansion of leaf cell in TPL tissues...
2017: PloS One
https://www.readbyqxmd.com/read/28516293/the-dominant-allele-aft-induces-a-shift-from-flavonol-to-anthocyanin-production-in-response-to-uv-b-radiation-in-tomato-fruit
#14
Stefano Catola, Antonella Castagna, Marco Santin, Valentina Calvenzani, Katia Petroni, Andrea Mazzucato, Annamaria Ranieri
The introgression of the A ft allele into domesticated tomato induced a shift from flavonol to anthocyanin production in response to UV-B radiation, while the hp - 1 allele negatively influenced the response of flavonoid biosynthesis to UV-B. Introgression of the dominant allele Anthocyanin fruit (Aft) from Solanum chilense induces anthocyanin accumulation in the peel of tomato (Solanum lycopersicum L.) fruit. UV-B radiation can influence plant secondary metabolism regulating the expression of several genes, among which those involved in flavonoid biosynthesis...
May 17, 2017: Planta
https://www.readbyqxmd.com/read/28473720/organ-specific-transcriptome-profiling-of-metabolic-and-pigment-biosynthesis-pathways-in-the-floral-ornamental-progenitor-species-anthurium-amnicola-dressler
#15
Jon Y Suzuki, Teresita D Amore, Bernarda Calla, Nathan A Palmer, Erin D Scully, Scott E Sattler, Gautam Sarath, Joanne S Lichty, Roxana Y Myers, Lisa M Keith, Tracie K Matsumoto, Scott M Geib
Anthurium amnicola Dressler possesses a number of desirable and novel ornamental traits such as a purple-colored upright spathe, profuse flowering, and floral scent, some of which have been introgressed into modern Anthurium cultivars. As a first step in identifying genes associated with these traits, the transcriptome from root, leaf, spathe, and spadix from an accession of A. amnicola was assembled, resulting in 28,019 putative transcripts representing 19,458 unigenes. Genes involved in pigmentation, including those for the metabolism of chlorophyll and the biosynthesis of carotenoids, phenylpropanoids, and flavonoids were identified...
May 4, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28469625/light-induced-variation-in-phenolic-compounds-in-cabernet-sauvignon-grapes-vitis-vinifera-l-involves-extensive-transcriptome-reprogramming-of-biosynthetic-enzymes-transcription-factors-and-phytohormonal-regulators
#16
Run-Ze Sun, Guo Cheng, Qiang Li, Yan-Nan He, Yu Wang, Yi-Bin Lan, Si-Yu Li, Yan-Rong Zhu, Wen-Feng Song, Xue Zhang, Xiao-Di Cui, Wu Chen, Jun Wang
Light environments have long been known to influence grape (Vitis vinifera L.) berry development and biosynthesis of phenolic compounds, and ultimately affect wine quality. Here, the accumulation and compositional changes of hydroxycinnamic acids (HCAs) and flavonoids, as well as global gene expression were analyzed in Cabernet Sauvignon grape berries under sunlight exposure treatments at different phenological stages. Sunlight exposure did not consistently affect the accumulation of berry skin flavan-3-ol or anthocyanin among different seasons due to climatic variations, but increased HCA content significantly at véraison and harvest, and enhanced flavonol accumulation dramatically with its timing and severity degree trend...
2017: Frontiers in Plant Science
https://www.readbyqxmd.com/read/28444442/high-accumulation-of-anthocyanins-via-the-ectopic-expression-of-atdfr-confers-significant-salt-stress-tolerance-in-brassica-napus-l
#17
Jihye Kim, Won Je Lee, Tien Thanh Vu, Chan Young Jeong, Suk-Whan Hong, Hojoung Lee
The ectopic expression of AtDFR results in increased accumulation of anthocyanins leading to enhanced salinity and drought stress tolerance in B. napus plants. Flavonoids with antioxidant effects confer many additional benefits to plants. Evidence indicates that flavonoids, including anthocyanins, protect tissues against oxidative stress from various abiotic stressors. We determined whether increases in anthocyanins increased abiotic stress tolerance in Brassica napus, because the values of B. napus L. and its cultivation area are increasing worldwide...
April 25, 2017: Plant Cell Reports
https://www.readbyqxmd.com/read/28440563/the-sumo-e3-ligase-mdsiz1-promotes-anthocyanin-accumulation-by-sumoylating-mdmyb1-under-low-temperature-conditions-in-apple
#18
Li-Jie Zhou, Yuan-Yuan Li, Rui-Fen Zhang, Chun-Ling Zhang, Xing-Bin Xie, Cheng Zhao, Yu-Jin Hao
MdMYB1 acts as a crucial component of the MYB-bHLH-WD40 (MBW) complex to regulate anthocyanin biosynthesis in red-skinned apples (Malus domestica), but little is known about its posttranslational regulation. Here, a SUMO E3 ligase MdSIZ1 was screened out as an MdMYB1-interacting protein with a yeast two-hybridization approach. The interaction between MdSIZ1 and MdMYB1 was further verified with pull-down and CoIP assays. Furthermore, it was found that MdSIZ1 directly sumoylated MdMYB1 proteins in vivo and in vitro, especially under moderately low temperature (17 °C) conditions, and that this sumoylation was required for MdMYB1 protein stability...
April 25, 2017: Plant, Cell & Environment
https://www.readbyqxmd.com/read/28428793/transcriptomics-targeted-metabolomics-and-gene-expression-of-blackberry-leaves-and-fruits-indicate-flavonoid-metabolic-flux-from-leaf-to-red-fruit
#19
Enrique Gutierrez, Ana García-Villaraco, José A Lucas, Ana Gradillas, F Javier Gutierrez-Mañero, Beatriz Ramos-Solano
Blackberries (Rubus spp.) are among the high added value food products relevant for human health due to the increasing evidence of the beneficial effects of polyphenols, which are very abundant in these fruits. Interestingly, these compounds also play a role on plant physiology, being especially relevant their role in plant defense against biotic and abiotic stress. Hence, we hypothesize that since blackberry fruits have high amounts of flavonols and anthocyanins, leaves would also have high amounts of these compounds, and can be studied as a source of active molecules; furthermore, leaf synthesis would support their high contents in fruits...
2017: Frontiers in Plant Science
https://www.readbyqxmd.com/read/28428782/a-recombinant-potato-virus-y-infectious-clone-tagged-with-the-rosea1-visual-marker-pvy-ros1-facilitates-the-analysis-of-viral-infectivity-and-allows-the-production-of-large-amounts-of-anthocyanins-in-plants
#20
Teresa Cordero, Mohamed A Mohamed, Juan-José López-Moya, José-Antonio Daròs
Potato virus Y (PVY) is a major threat to the cultivation of potato and other solanaceous plants. By inserting a cDNA coding for the Antirrhinum majus Rosea1 transcription factor into a PVY infectious clone, we created a biotechnological tool (PVY-Ros1) that allows infection by this relevant plant virus to be tracked by the naked eye with no need for complex instrumentation. Rosea1 is an MYB-type transcription factor whose expression activates the biosynthesis of anthocyanin pigments in a dose-specific and cell-autonomous manner...
2017: Frontiers in Microbiology
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