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Anthocyanin, regulation

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https://www.readbyqxmd.com/read/28643121/a-study-on-the-expression-of-genes-involved-in-carotenoids-and-anthocyanins-during-ripening-in-fruit-peel-of-green-yellow-and-red-colored-mango-cultivars
#1
G R Karanjalker, K V Ravishankar, K S Shivashankara, M R Dinesh, T K Roy, D V Sudhakar Rao
Mango (Mangiferaindica L.) fruits are generally classified based on peel color into green, yellow, and red types. Mango peel turns from green to yellow or red or retain green colors during ripening. The carotenoids and anthocyanins are the important pigments responsible for the colors of fruits. In the present study, peels of different colored cultivars at three ripening stages were characterized for pigments, colors, and gene expression analysis. The yellow colored cultivar "Arka Anmol" showed higher carotenoid content, wherein β-carotene followed by violaxanthin were the major carotenoid compounds that increased during ripening...
June 22, 2017: Applied Biochemistry and Biotechnology
https://www.readbyqxmd.com/read/28640973/production-of-red-flowered-oilseed-rape-via-the-ectopic-expression-of-orychophragmus-violaceus-ovpap2
#2
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/28636830/attenuation-of-hepatic-steatosis-by-purple-sweet-potato-color-is-associated-with-blocking-src-erk-c-ebp%C3%AE-signalling-in-high-fat-diet-treated-mice
#3
Xin Wang, Zi-Feng Zhang, Gui-Hong Zheng, Ai-Min Wang, Chun-Hui Sun, Su-Ping Qin, Juan Zhuang, Jun Lu, Dai-Fu Ma, Yuan-Lin Zheng
Our previous work showed that purple sweet potato color (PSPC), a class of naturally occurring anthocyanins, effectively improved hepatic glucose metabolic dysfunction in high-fat diet (HFD)-treated mice. This study investigated the effects of PSPC on HFD-induced hepatic steatosis and the signalling events associated with these effects. Mice were divided into four groups: Control group, HFD group, HFD+PSPC group and PSPC group. PSPC was administered daily for 20 weeks at oral doses of 700 mg/kg/day. Our results showed that PSPC significantly improved obesity and related metabolic parameters, as well as liver injury in HFD-treated mice...
June 21, 2017: Applied Physiology, Nutrition, and Metabolism, Physiologie Appliquée, Nutrition et Métabolisme
https://www.readbyqxmd.com/read/28634482/whole-plant-temperature-manipulation-affects-flavonoid-metabolism-and-the-transcriptome-of-grapevine-berries
#4
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
#5
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
#6
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
#7
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/28595545/anticancer-polyphenols-from-cultured-plant-cells-production-and-new-bioengineering-strategies
#8
Victor Bulgakov, Yulia V Vereshchagina, Galina N Veremeichik
For many years, anticancer polyphenols have attracted significant attention as substances that prevent tumor growth and progression. These compounds are simple phenolic acids; complex phenolic acids, such as caffeoylquinic acids, rosmarinic acid and its derivatives; stilbenes (resveratrol and piceatannol); flavones; isoflavones (genistein and tectorigenin); and anthocyanins. Some compounds, such as tea and coffee polyphenols, can be produced in large quantities by traditional methods, while many others cannot...
June 8, 2017: Current Medicinal Chemistry
https://www.readbyqxmd.com/read/28587075/identification-of-anthocyanin-composition-and-functional-analysis-of-an-anthocyanin-activator-in-solanum-nigrum-fruits
#9
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/28586465/ros-induces-anthocyanin-production-via-late-biosynthetic-genes-and-anthocyanin-deficiency-confers-the-hypersensitivity-to-ros-generating-stresses-in-arabidopsis
#10
Zhenhua Xu, Kashif Mahmood, Steven J Rothstein
Anthocyanins are known to have antioxidant activities. Their accumulation can be triggered by many chemical and environmental factors, including reactive oxygen species (ROS). However, the mechanism of ROS-induced anthocyanin accumulation and the role of anthocyanins in the response of Arabidopsis (Arabidopsis thaliana) to different stresses are largely unknown. Here, we study the cross-regulation between ROS and anthocyanin production. Ten Arabidopsis mutants covering the main anthocyanin regulatory and biosynthetic genes are systematically analyzed under ROS-generating stresses...
June 6, 2017: Plant & Cell 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
#11
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/28566222/tissue-specific-transcriptomic-profiling-provides-new-insights-into-the-reproductive-ecology-and-biology-of-the-iconic-seagrass-species-posidonia-oceanica
#12
Laura Entrambasaguas, Marlene Jahnke, Elio Biffali, Marco Borra, Remo Sanges, Lázaro Marín-Guirao, Gabriele Procaccini
Seagrasses form extensive meadows in shallow coastal waters and are among the world's most productive ecosystems. Seagrasses can produce both clonally and sexually, and flowering has long been considered infrequent, but important for maintaining genetically diverse stands. Here we investigate the molecular mechanisms involved in flowering of the seagrass Posidonia oceanica, an iconic species endemic to the Mediterranean. We generated a de novo transcriptome of this non-model species for leaf, male and female flower tissue of three individuals, and present molecular evidence for genes that may be involved in the flowering process and on the reproductive biology of the species...
May 26, 2017: Marine Genomics
https://www.readbyqxmd.com/read/28562364/the-effects-of-blueberry-anthocyanins-on-histone-acetylation-in-rat-liver-fibrosis
#13
Wei Zhan, Xin Liao, Ru-Jia Xie, Tian Tian, Lei Yu, Xing Liu, Jing Liu, Po Li, Bing Han, Ting Yang, Bei Zhang, Li-Jun Cai, Rui Li, Qin Yang
To determine the effects of anthocyanins from blueberries on hepatic stellate cell (HSCs-T6) and on histone acetylation during liver fibrosis induced by CCl4 in rats. Fifty male SD rats weighing 180 ± 20g were randomly placed into a control group, a hepatic fibrosis group, a blueberry treatment group, a blueberry intervention group, and a natural recovery group. After the rats were sacrificed, the livers and the liver indexes were measured, and the pathological changes were observed by HE staining and Masson staining...
May 13, 2017: Oncotarget
https://www.readbyqxmd.com/read/28549152/mdsnrk1-1-interacts-with-mdjaz18-to-regulate-sucrose-induced-anthocyanin-and-proanthocyanidin-accumulation-in-apple
#14
Xiao-Juan Liu, Xiu-Hong An, Xin Liu, Da-Gang Hu, Xiao-Fei Wang, Chun-Xiang You, Yu-Jin Hao
Sugars induce anthocyanin biosynthesis in plants. As a conserved energy sensor, SnRK1 (SNF1-related kinase 1) is involved in sucrose-induced anthocyanin accumulation. However, the exact molecular mechanism by which SnRK1 regulates the biosynthesis of anthocyanins and proanthocyanidins (PAs) in response to sucrose in plants is not clear. In this study, it was found that MdSnRK1.1 interacted with MdJAZ18 protein which acts as a repressor in the jasmonate (JA) signaling pathway. MdSnRK1.1 then phosphorylated MdJAZ18 to facilitate its 26S proteasome-mediated degradation, which released MdbHLH3 thereby activating the expression of the regulatory and structural genes, thus finally promoting the biosynthesis of anthocyanins and PAs...
May 25, 2017: Journal of Experimental Botany
https://www.readbyqxmd.com/read/28534253/evaluating-the-involvement-and-interaction-of-abscisic-acid-and-mirna156-in-the-induction-of-anthocyanin-biosynthesis-in-drought-stressed-plants
#15
REVIEW
Jorge González-Villagra, Leonid V Kurepin, Marjorie M Reyes-Díaz
ABA is involved in anthocyanin synthesis through the regulation of microRNA156, augmenting the level of expression of anthocyanin synthesis-related genes and, therefore, increasing anthocyanin level. Drought stress is the main cause of agricultural crop loss in the world. However, plants have developed mechanisms that allow them to tolerate drought stress conditions. At cellular level, drought stress induces changes in metabolite accumulation, including increases in anthocyanin levels due to upregulation of the anthocyanin biosynthetic pathway...
May 22, 2017: Planta
https://www.readbyqxmd.com/read/28523445/ptrmyb57-contributes-to-the-negative-regulation-of-anthocyanin-and-proanthocyanidin-biosynthesis-in-poplar
#16
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
#17
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
#18
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/28501772/hyperoside-protects-against-chronic-mild-stress-induced-learning-and-memory-deficits
#19
Yeli Gong, Youhua Yang, Xiaoqing Chen, Min Yang, Dan Huang, Rong Yang, Lianying Zhou, Changlei Li, Qiuju Xiong, Zhe Xiong
Hyperoside (quercetin-3-O-b-d-galactosidepyranose) is a plant-derived flavonoid mainly found in fruits, fruit juices (most notably flavanols, flavanones, and anthocyanins) and Chinese traditional medicines. It has been applied to relieve pain and improve cardiovascular functions in clinic. However, the effects of hyperoside on cognitive impairment induced by chronic stress and the underlying molecular mechanisms remain unclear. In the current study, we used chronic mild stress (CMS) rats to investigate the effects of hyperoside on learning and memory and further explore the possible mechanisms...
July 2017: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
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
#20
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
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