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Anthocyanin, pigment, flower

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https://www.readbyqxmd.com/read/29316619/radical-scavenging-and-anti-inflammatory-activities-of-representative-anthocyanin-groupings-from-pigment-rich-fruits-and-vegetables
#1
Federica Blando, Nadia Calabriso, Helge Berland, Gabriele Maiorano, Carmela Gerardi, Maria Annunziata Carluccio, Øyvind M Andersen
Anthocyanins, the naturally occurring pigments responsible for most red to blue colours of flowers, fruits and vegetables, have also attracted interest because of their potential health effects. With the aim of contributing to major insights into their structure-activity relationship (SAR), we have evaluated the radical scavenging and biological activities of selected purified anthocyanin samples (PASs) from various anthocyanin-rich plant materials: two fruits (mahaleb cherry and blackcurrant) and two vegetables (black carrot and "Sun Black" tomato), differing in anthocyanin content (ranging from 4...
January 6, 2018: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/29247705/transcriptome-and-metabolic-profiling-provides-insights-into-betalain-biosynthesis-and-evolution-in-mirabilis-jalapa
#2
Guy Polturak, Uwe Heinig, Noam Grossman, Maor Battat, Dena Leshkowitz, Sergey Malitsky, Ilana Rogachev, Asaph Aharoni
Betalains are tyrosine-derived pigments that occur solely in one plant order, the Caryophyllales, where they largely replace the anthocyanins in a mutually exclusive fashion. In this study, we conducted multi-species transcriptome and metabolic profiling in Mirabilis jalapa and additional betalain-producing species to identify candidate genes possibly involved with betalain biosynthesis. Among the candidates identified, betalain-related cytochrome P450 and glucosyltransferase-type genes, which catalyze tyrosine hydroxylation or (hydroxy)cinnamoyl-glucose formation, respectively, were further functionally characterized...
December 13, 2017: Molecular Plant
https://www.readbyqxmd.com/read/29244558/loss-of-color-pigmentation-is-maintained-at-high-frequency-in-a-monkey-flower-population
#3
Alex D Twyford, Aaron M Caola, Pratibha Choudhary, Ramesh Raina, Jannice Friedman
Color polymorphisms have long been of evolutionary interest for their diverse roles, including mate choice, predator avoidance, and pollinator attraction. While color variation is often under strong selection, some taxa demonstrate unexpectedly high frequencies of presumed deleterious color forms. Here we show that a genetic variant underlying complete loss of anthocyanin pigmentation has risen to an unexpectedly high frequency of >0.2 in a natural population of the plant Mimulus guttatus. Decreased expression of MYB5 transcription factor is associated with unpigmented morphs...
January 2018: American Naturalist
https://www.readbyqxmd.com/read/29210634/preventive-and-therapeutic-potentials-of-anthocyanins-in-diabetes-and-associated-complications
#4
Swathi Putta, Nagendra Sastry Yarla, Eswar K Kumar, Dhananjaya Bhadrapura Lakkappa, Mohammad A Kamal, Luciana Scotti, Marcus T Scotti, Ghulam Md Ashraf, George E Barreto, B Sasi Bhusana Rao, D Sarala Kumari, Gorla V Reddy, Vadim V Tarasov, Sarat Babu Imandi, Gjumrakch Aliev
Diet is an essential factor affecting the development of and risk for diabetes mellitus. In search of preventative and therapeutic strategies, it is to be considering the potential role of certain foods and their bioactive compounds to prevent the pathogenesis associated with metabolic diseases. Human consumption of anthocyanins is among the highest of all flavonoids. Epidemiological studies have suggested that the consumption of anthocyanins lowers the risk of diabetes and diabetic complications. Anthocyanins are important natural bioactive pigments responsible for red to blue colour of fruits, leaves, seeds, stems and flowers, which are present in a variety of plant species particularly in berries and cherries...
December 5, 2017: Current Medicinal Chemistry
https://www.readbyqxmd.com/read/29051190/molecular-basis-of-overdominance-at-a-flower-color-locus
#5
Amy M LaFountain, Wenjie Chen, Wei Sun, Shilin Chen, Harry A Frank, Baoqing Ding, Yao-Wu Yuan
Single-gene overdominance is one of the major mechanisms proposed to explain heterosis (i.e., hybrid vigor), the phenomenon that hybrid offspring between two inbred lines or varieties show superior phenotypes to both parents. Although sporadic examples of single-gene overdominance have been reported over the decades, the molecular nature of this phenomenon remains poorly understood and it is unclear whether any generalizable principle underlies the various cases. Through bulk segregant analysis, chemical profiling, and transgenic experiments, we show that loss-of-function alleles of the FLAVONE SYNTHASE (FNS) gene cause overdominance in anthocyanin-based flower color intensity in the monkeyflower species Mimulus lewisii FNS negatively affects flower color intensity by competing with the anthocyanin biosynthetic enzymes for the same substrates, yet positively affects flower color intensity by producing flavones, the colorless co-pigments required for anthocyanin stabilization, leading to enhanced pigmentation in the heterozyote (FNS/fns) relative to both homozygotes (FNS/FNS and fns/fns)...
October 19, 2017: G3: Genes—Genomes—Genetics
https://www.readbyqxmd.com/read/29023752/a-novel-r3-myb-transcriptional-repressor-associated-with-the-loss-of-floral-pigmentation-in-iochroma
#6
Daniel J Gates, Bradley J S C Olson, Tom E Clemente, Stacey D Smith
Losses of floral pigmentation represent one of the most common evolutionary transitions in flower color, yet the genetic basis for these changes has been elucidated in only a handful of cases. Here we used crossing studies, bulk-segregant RNA sequencing, phylogenetic analyses and functional tests to identify the gene(s) responsible for the transition to white flowers in Iochroma loxense. Crosses between I. loxense and its blue-flowered sister species, I. cyaneum, suggested that a single locus controls the flower color difference and that the white allele causes a nearly complete loss of pigmentation...
October 12, 2017: New Phytologist
https://www.readbyqxmd.com/read/28966045/transcriptome-analysis-reveals-potential-genes-involved-in-flower-pigmentation-in-a-red-flowered-mutant-of-white-clover-trifolium-repens-l
#7
Heshan Zhang, Hong Tian, Mingxin Chen, Junbo Xiong, Hua Cai, Yang Liu
White clover (Trifolium repens L.) has been cultivated for ornamental use because of its flowers, leaf marks and creeping habit. Although a mutation in flower color is very infrequent in this species, the red-flowered mutant of white clover was a novel germplasm for ornamental white clover breeding. The mechanism of flower pigmentation in white clover is still limited because of the rarity of mutation materials and the lack of genomic data. In this study, two cDNA libraries from red-flowered white clover mutant between sunlight-exposed plants and shade-treated plants, respectively, were used for transcriptome sequencing...
September 28, 2017: Genomics
https://www.readbyqxmd.com/read/28924499/genome-wide-identification-of-the-mads-box-transcription-factor-family-in-pear-pyrus-bretschneideri-reveals-evolution-and-functional-divergence
#8
Runze Wang, Meiling Ming, Jiaming Li, Dongqing Shi, Xin Qiao, Leiting Li, Shaoling Zhang, Jun Wu
MADS-box transcription factors play significant roles in plant developmental processes such as floral organ conformation, flowering time, and fruit development. Pear (Pyrus), as the third-most crucial temperate fruit crop, has been fully sequenced. However, there is limited information about the MADS family and its functional divergence in pear. In this study, a total of 95 MADS-box genes were identified in the pear genome, and classified into two types by phylogenetic analysis. Type I MADS-box genes were divided into three subfamilies and type II genes into 14 subfamilies...
2017: PeerJ
https://www.readbyqxmd.com/read/28888431/thermal-pest-control-in-tannat-grapes-effect-on-anthocyanins-sensory-and-color-of-one-year-old-wines
#9
Taísa Ceratti Treptow, Carine Gláucia Comarella, Fernanda Wouters Franco, Eliseu Rodrigues, Fabrício Domingues, Vivian Caetano Bochi, Cláudia Kaehler Sautter
Thermal pest control (TPC) is a technology that applies heated air in the vineyard to reduce pests. However, it can also alter grape anthocyanin synthesis in answer to temperature stress. The aim of this work was to determine the impact of TPC in 'Tannat' grape vineyards on wine quality. The major makers of quality considered in this study were the wine anthocyanin characterization by HPLC-PDA-MS(n), beverage's sensory evaluation by descriptive analysis, and color parameters by instrumental analysis. A total of three experiments were performed in different harvesting years...
October 2017: Food Research International
https://www.readbyqxmd.com/read/28885552/structure-of-pigment-metabolic-pathways-and-their-contributions-to-white-tepal-color-formation-of-chinese-narcissus-tazetta-var-chinensis-cv-jinzhanyintai
#10
Yujun Ren, Jingwen Yang, Bingguo Lu, Yaping Jiang, Haiyang Chen, Yuwei Hong, Binghua Wu, Ying Miao
Chinese narcissus (Narcissus tazetta var. chinensis) is one of the ten traditional flowers in China and a famous bulb flower in the world flower market. However, only white color tepals are formed in mature flowers of the cultivated varieties, which constrains their applicable occasions. Unfortunately, for lack of genome information of narcissus species, the explanation of tepal color formation of Chinese narcissus is still not clear. Concerning no genome information, the application of transcriptome profile to dissect biological phenomena in plants was reported to be effective...
September 8, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28797084/the-endogenous-transposable-element-tgm9-is-suitable-for-generating-knockout-mutants-for-functional-analyses-of-soybean-genes-and-genetic-improvement-in-soybean
#11
Devinder Sandhu, Jayadri Ghosh, Callie Johnson, Jordan Baumbach, Eric Baumert, Tyler Cina, David Grant, Reid G Palmer, Madan K Bhattacharyya
In soybean, variegated flowers can be caused by somatic excision of the CACTA-type transposable element Tgm9 from Intron 2 of the DFR2 gene encoding dihydroflavonol-4-reductase of the anthocyanin pigment biosynthetic pathway. DFR2 was mapped to the W4 locus, where the allele containing Tgm9 was termed w4-m. In this study we have demonstrated that previously identified morphological mutants (three chlorophyll deficient mutants, one male sterile-female fertile mutant, and three partial female sterile mutants) were caused by insertion of Tgm9 following its excision from DFR2...
2017: PloS One
https://www.readbyqxmd.com/read/28782017/generation-of-blue-chrysanthemums-by-anthocyanin-b-ring-hydroxylation-and-glucosylation-and-its-coloration-mechanism
#12
Naonobu Noda, Satoshi Yoshioka, Sanae Kishimoto, Masayoshi Nakayama, Mitsuru Douzono, Yoshikazu Tanaka, Ryutaro Aida
Various colored cultivars of ornamental flowers have been bred by hybridization and mutation breeding; however, the generation of blue flowers for major cut flower plants, such as roses, chrysanthemums, and carnations, has not been achieved by conventional breeding or genetic engineering. Most blue-hued flowers contain delphinidin-based anthocyanins; therefore, delphinidin-producing carnation, rose, and chrysanthemum flowers have been generated by overexpression of the gene encoding flavonoid 3',5'-hydroxylase (F3'5'H), the key enzyme for delphinidin biosynthesis...
July 2017: Science Advances
https://www.readbyqxmd.com/read/28597434/ectopic-expression-of-lc-differentially-regulated-anthocyanin-biosynthesis-in-the-floral-parts-of-tobacco-nicotiana-tobacum-l-plants
#13
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/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
#14
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...
September 1, 2017: Plant & Cell Physiology
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/28407900/lipophilization-and-ms-characterization-of-the-main-anthocyanins-purified-from-hibiscus-flowers
#16
Claudia Grajeda-Iglesias, Erika Salas, Nathalie Barouh, Bruno Baréa, Maria Cruz Figueroa-Espinoza
Hibiscus sabdariffa flowers represent an interesting source of anthocyanins, one of the most important plant pigments, which are responsible of the intense red color of the calyces, and have potential as natural colorants for food applications. Nevertheless, anthocyanins are highly hydrosoluble and unstable compounds. On this basis, the aim of this work was to increase the lipophilicity of the hibiscus anthocyanins by lipophilization, in order to obtain amphiphilic colorants, which could be easily incorporated in lipid-rich food matrices...
September 1, 2017: Food Chemistry
https://www.readbyqxmd.com/read/28346355/characterization-of-active-anthocyanin-degradation-in-the-petals-of-rosa-chinensis-and-brunfelsia-calycina-reveals-the-effect-of-gallated-catechins-on-pigment-maintenance
#17
Honghui Luo, Shuangfan Deng, Wei Fu, Xin Zhang, Xuelian Zhang, Zhaoqi Zhang, Xuequn Pang
Anthocyanin degradation decreases ornamental or nutritional values of horticultural products. To investigate factors that may influence colour change in flower development, anthocyanin degradation was compared between the flowers of Brunfelsia calycina and Rosa chinensis, which show rapid and slow degradation, respectively. In-gel activity assays, high performance liquid chromatography (HPLC) analysis of tannins, enzyme kinetics measurement and immune-detection of anthocyanin degradation related-perioxidases (PODs) were carried out for the comparison...
March 25, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28338881/mdhb1-down-regulation-activates-anthocyanin-biosynthesis-in-the-white-fleshed-apple-cultivar-granny-smith
#18
Yonghua Jiang, Cuihua Liu, Dan Yan, Xiaohong Wen, Yanli Liu, Haojie Wang, Jieyu Dai, Yujie Zhang, Yanfei Liu, Bin Zhou, Xiaolin Ren
Coloration in apple (Malus×domestica) flesh is mainly caused by the accumulation of anthocyanin. Anthocyanin is biosynthesized through the flavonoid pathway and regulated by MYB, bHLH, and WD40 transcription factors (TFs). Here, we report that the HD-Zip I TF MdHB1 was also involved in the regulation of anthocyanin accumulation. MdHB1 silencing caused the accumulation of anthocyanin in 'Granny Smith' flesh, whereas its overexpression reduced the flesh content of anthocyanin in 'Ballerina' (red-fleshed apple)...
February 1, 2017: Journal of Experimental Botany
https://www.readbyqxmd.com/read/28318977/aromatic-decoration-determines-the-formation-of-anthocyanic-vacuolar-inclusions
#19
Kalyani Kallam, Ingo Appelhagen, Jie Luo, Nick Albert, Huaibi Zhang, Simon Deroles, Lionel Hill, Kim Findlay, Øyvind M Andersen, Kevin Davies, Cathie Martin
Anthocyanins are some of the most widely occurring secondary metabolites in plants, responsible for the orange, red, purple, and blue colors of flowers and fruits and red colors of autumn leaves. These pigments accumulate in vacuoles, and their color is influenced by chemical decorations, vacuolar pH, the presence of copigments, and metal ions. Anthocyanins are usually soluble in the vacuole, but in some plants, they accumulate as discrete sub-vacuolar structures. Studies have distinguished intensely colored intra-vacuolar bodies observed in the cells of highly colored tissues, termed anthocyanic vacuolar inclusions (AVIs), from more globular, membrane-bound anthocyanoplasts...
April 3, 2017: Current Biology: CB
https://www.readbyqxmd.com/read/28230761/transcriptomic-analysis-of-leaf-in-tree-peony-reveals-differentially-expressed-pigments-genes
#20
Jianrang Luo, Qianqian Shi, Lixin Niu, Yanlong Zhang
Tree peony (Paeonia suffruticosa Andrews) is an important traditional flower in China. Besides its beautiful flower, the leaf of tree peony has also good ornamental value owing to its leaf color change in spring. So far, the molecular mechanism of leaf color change in tree peony is unclear. In this study, the pigment level and transcriptome of three different color stages of tree peony leaf were analyzed. The purplish red leaf was rich in anthocyanin, while yellowish green leaf was rich in chlorophyll and carotenoid...
February 20, 2017: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
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