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Anthocyanin, transcription

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
Claus Wasternack, Miroslav Strnad
Jasmonates (JAs) are signals in plant stress responses and development. One of the first observed and prominent responses to JAs is the induction of biosynthesis of different groups of secondary compounds. Among them are nicotine, isoquinolines, glucosinolates, anthocyanins, benzophenanthridine alkaloids, artemisinin, and terpenoid indole alkaloids (TIAs), such as vinblastine. This brief review describes modes of action of JAs in the biosynthesis of anthocyanins, nicotine, TIAs, glucosinolates and artemisinin...
October 7, 2017: New Biotechnology
Kaili Chen, Hongli Liu, Qian Lou, Yali Liu
[This corrects the article on p. 965 in vol. 8, PMID: 28642775.].
2017: Frontiers in Plant Science
Yuan Zong, Xinyuan Xi, Shiming Li, Wenjie Chen, Bo Zhang, Dengcai Liu, Baolong Liu, Daowen Wang, Huaigang Zhang
Recently the TaMYC1 gene encoding bHLH transcription factor has been isolated from the bread wheat (Triticum aestivum L.) genome and shown to co-locate with the Pp3 gene conferring purple pericarp color. As a functional evidence of TaMYC1 and Pp3 being the same, higher transcriptional activity of the TaMYC1 gene in colored pericarp compared to uncolored one has been demonstrated. In the current study, we present additional strong evidences of TaMYC1 to be a synonym of Pp3. Furthermore, we have found differences between dominant and recessive Pp3(TaMyc1) alleles...
2017: Frontiers in Plant Science
Abdul Basit Baba, Ramesh Nivetha, Indranil Chattopadhyay, Siddavaram Nagini
Blueberries, a rich source of anthocyanins have attracted considerable attention as functional foods that confer immense health benefits including anticancer properties. Herein, we assessed the potential of blueberry and its major constituent malvidin to target STAT-3, a potentially druggable oncogenic transcription factor with high therapeutic index. We demonstrate that blueberry abrogates the JAK/STAT-3 pathway and modulates downstream targets that influence cell proliferation and apoptosis in a hamster model of oral oncogenesis...
September 30, 2017: Food and Chemical Toxicology
Md Abdur Rahim, Arif Hasan Khan Robin, Sathishkumar Natarajan, Hee-Jeong Jung, Jeongyeo Lee, HyeRan Kim, Hoy-Taek Kim, Jong-In Park, Ill-Sup Nou
Kohlrabi (Brassica oleracea var. gongylodes L.) is an important vegetable of the Brassicaceae family. The main edible part of kohlrabi is the swollen stem. The purple cultivars make anthocyanin mainly in the peel of the swollen stem, while in the leaf, it is limited to the midrib, but green cultivars do not. Anthocyanins are advantageous for both plants as well as humans. Two anthocyanin compounds were detected by high pressure liquid chromatography (HPLC) only in the peel of the purple kohlrabi cultivar. Three MYBs, three bHLHs, and one WD40 TF were identified as the candidate regulatory genes in kohlrabi...
September 30, 2017: Applied Biochemistry and Biotechnology
Kai Feng, Zhi-Sheng Xu, Feng Que, Jie-Xia Liu, Feng Wang, Ai-Sheng Xiong
This study showed that an R2R3-MYB transcription factor, OjMYB1, is involved in anthocyanin biosynthesis and accumulation in Oenanthe javanica. Anthocyanins can be used as safe natural food colorants, obtained from many plants. R2R3-MYB transcription factors (TFs) play important roles in anthocyanins biosynthesis during plant development. Oenanthe javanica is a popular vegetable with high nutritional values and numerous medical functions. O. javanica has purple petioles that are mainly due to anthocyanins accumulation...
September 30, 2017: Planta
Jungmin Ha, Myoyeon Kim, Moon Young Kim, Taeyoung Lee, Min Young Yoon, Jayern Lee, Yeong-Ho Lee, Young-Gyu Kang, Jun Seong Park, John Hwan Lee, Suk-Ha Lee
BACKGROUND: Proanthocyanidins are oligomeric or polymeric end products of flavonoid metabolic pathways starting with the central phenylpropanoid pathway. Although soybean (Glycine spp.) seeds represent a major source of nutrients for the human diet as well as components for the cosmetics industry due to their high levels of flavonoid metabolites, including isoflavonoids, anthocyanins, and proanthocyanidins, the genetic regulatory mechanisms underlying proanthocyanidin biosynthesis in soybean remain unclear...
September 27, 2017: Journal of the Science of Food and Agriculture
Yun Zhao, Weiqi Dong, Ke Wang, Bo Zhang, Andrew C Allan, Kui Lin-Wang, Kunsong Chen, Changjie Xu
Anthocyanins provide nutritional benefits and are responsible for red coloration in many fruits. Light affects anthocyanin biosynthesis in peach (Prunus persica). However, some cultivars show differential sensitivity to light. In the present study, 'Hujingmilu (HJ),' a naturally deeply colored cultivar, and 'Yulu (YL),' showing low pigmentation, were used to study the mechanism underlying UV-light-induced anthocyanin biosynthesis. Both UVA and UVB induced fruit pigmentation of 'HJ,' but 'YL' was only sensitive to UVB...
2017: Frontiers in Plant Science
Chenhao Gao, Yuan Guo, Jianjun Wang, Dong Li, Kaige Liu, Shuanghui Qi, Changyu Jin, Shaowei Duan, Jingyun Gong, Zixiong Li, Mingxun Chen
Previous studies have shown that GLABRA3 (AtGL3), a bHLH transcription factor, plays essential roles in anthocyanin biosynthesis and trichome formation in Arabidopsis thaliana. However, there have been no such studies of a homolog, BnGL3, from the closely related crop, Brassica napus. Here, we analyzed the BnGL3-1 coding domain sequence from the B. napus cultivar QINYOU Seven, identified conserved protein domains, and performed a phylogenetic analysis to elucidate its relationship with homologs form a range of plant species...
September 21, 2017: Plant Biology
Jing Li, Li Ren, Zhen Gao, Mingmin Jiang, Yang Liu, Lu Zhou, Yongjun He, Huoying Chen
Light is a key environmental factor affecting anthocyanin biosynthesis. Our previous study demonstrated that 'Lanshan Hexian' is a light-sensitive eggplant cultivar, but its regulatory mechanism is unknown. Here, delphinidin-3-[4-(cis-p-coumaroyl)-rhamnosyl-glucopyranoside]-5-glucopyranoside and delphinidin-3-[4-(trans-p-coumaroyl)-rhamnosyl-glucopyranoside]-5-glucopyranoside were identified as the main anthocyanin components in 'Lanshan Hexian' by ultra-performance liquid chromatography-tandem mass spectrometry...
September 20, 2017: Plant, Cell & Environment
Alejandra Serrano, Carmen Espinoza, Grace Armijo, Claudio Inostroza-Blancheteau, Evelyn Poblete, Carlos Meyer-Regueiro, Anibal Arce, Francisca Parada, Claudia Santibáñez, Patricio Arce-Johnson
Grapevine fruit development is a dynamic process that can be divided into three stages: formation (I), lag (II), and ripening (III), in which physiological and biochemical changes occur, leading to cell differentiation and accumulation of different solutes. These stages can be positively or negatively affected by multiple environmental factors. During the last decade, efforts have been made to understand berry development from a global perspective. Special attention has been paid to transcriptional and metabolic networks associated with the control of grape berry development, and how external factors affect the ripening process...
2017: Frontiers in Plant Science
Xingxing Li, Mingjing Ke, Meng Zhang, W J G M Peijnenburg, Xiaoji Fan, Jiahui Xu, Zhenyan Zhang, Tao Lu, Zhengwei Fu, Haifeng Qian
Diclofop-methyl (DM), a common post-emergence herbicide, is frequently used in agricultural production. Silver nanoparticles (AgNPs) are one of the most widely used nanoparticles, and as such, have been detected and monitored in several environmental systems. Here we investigated the interactive effects of DM and AgNPs on the physiological morphology, photosynthesis and antioxidant system of Arabidopsis thaliana. Our results demonstrated that a 1.0 mg/L DM treatment had no significant effect on the fresh weight of plant shoots and the content of total chlorophyll and anthocyanin...
September 18, 2017: Environmental Pollution
Leila Caramanico, Laura Rustioni, Gabriella De Lorenzis
Iron chlorosis is a diffuse disorder affecting Mediterranean vineyards. Beside the commonly described symptom of chlorophyll decrease, an apex reddening was recently observed. Secondary metabolites, such as anthocyanins, are often synthetized to cope with stresses in plants. The present work aimed to evaluate grapevine responses to iron deficiency, in terms of anthocyanin metabolism (reflectance spectrum, total anthocyanin content, HPLC profile and gene expression) in apical leaves of Cabernet sauvignon and Sangiovese grown in hydroponic conditions...
September 9, 2017: Plant Physiology and Biochemistry: PPB
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
Yanfei Liu, Bin Zhou, Yingwei Qi, Xin Chen, Cuihua Liu, Zhande Liu, Xiaolin Ren
Fruits of kiwifruit cultivars (Actinidia chinensis and A. deliciosa) generally have green or yellow flesh when ripe. A small number of genotypes have red flesh but this coloration is usually restricted to the inner pericarp. Three kiwifruit cultivars having red ('Hongyang'), or yellow ('Jinnong-2'), or green ('Hayward') flesh were investigated for their color characteristics and pigment contents during development and ripening. The results show the yellow of the 'Jinnong-2' fruit is due to the combined effects of chlorophyll degradation and of beta-carotene accumulation...
2017: Frontiers in Plant Science
Jeng-Dong Hsu, Chia-Chun Wu, Chi-Nan Hung, Chau-Jong Wang, Hui-Pei Huang
Myrciaria cauliflora is a functional food rich in anthocyanins, possessing antioxidative and anti-inflammatory properties. Our previous results demonstrated M. cauliflora extract (MCE) had beneficial effects in diabetic nephropathy (DN) and via the inhibition of Ras/PI3K/Akt and kidney fibrosis-related proteins. The purpose of this study was to assess the benefit of MCE in diabetes associated with kidney inflammation and glycemic regulation in streptozotocin-nicotinamide (STZ/NA)-induced diabetic mice. Compared with the untreated diabetic group, MCE significantly improved blood glucose and serum biochemical characteristic levels...
October 2016: Journal of Food and Drug Analysis
Sandra Fresquet-Corrales, Edelín Roque, Alejandro Sarrión-Perdigones, Maricruz Rochina, María P López-Gresa, Huertas M Díaz-Mula, José M Bellés, Francisco Tomás-Barberán, José P Beltrán, Luis A Cañas
Proanthocyanidins (PAs), or condensed tannins, are powerful antioxidants that remove harmful free oxygen radicals from cells. To engineer the anthocyanin and proanthocyanidin biosynthetic pathways to de novo produce PAs in two Nicotiana species, we incorporated four transgenes to the plant chassis. We opted to perform a simultaneous transformation of the genes linked in a multigenic construct rather than classical breeding or retransformation approaches. We generated a GoldenBraid 2.0 multigenic construct containing two Antirrhinum majus transcription factors (AmRosea1 and AmDelila) to upregulate the anthocyanin pathway in combination with two Medicago truncatula genes (MtLAR and MtANR) to produce the enzymes that will derivate the biosynthetic pathway to PAs production...
2017: PloS One
Naoki Nanashima, Kayo Horie, Mitsuru Chiba, Manabu Nakano, Hayato Maeda, Toshiya Nakamura
Blackcurrants (Ribes nigrum L., Grossulariaceae) possess a high content of anthocyanin polyphenols, which have been demonstrated to exhibit beneficial effects on health due to their antioxidant and anticarcinogenic prope-rties. The present study investigated novel functions of anthocyanin‑rich blackcurrant extracts (BCEs) in a healthy mammary epithelial cell line, MCF10A. The percentages of viable cells were 85, 75, 53 and 31% following exposure to 50, 100, 200 and 400 µg/ml BCE, respectively. The half‑maximal response concentration of BCE was 237...
August 29, 2017: Molecular Medicine Reports
Yu Wang, Ying Dou, Rui Wang, Xuelian Guan, Zenghui Hu, Jian Zheng
The flower color of Syringa oblata Lindl., which is often modulated by the flavonoid content, varies and is an important ornamental feature. Chalcone synthase (CHS) catalyzes the first key step in the flavonoid biosynthetic pathway. However, little is known about the role of S. oblata CHS (SoCHS) in flavonoid biosynthesis in this species. Here, we isolate and analyze the cDNA (SoCHS1) that encodes CHS in S. oblata. We also sought to analyzed the molecular characteristics and function of flavonoid metabolism by SoCHS1...
November 30, 2017: Gene
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