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Anthocyanin, transcription

Pengfei Wang, Ling Su, Huanhuan Gao, Xilong Jiang, Xinying Wu, Yi Li, Qianqian Zhang, Yongmei Wang, Fengshan Ren
Basic helix-loop-helix (bHLH) transcription factors are involved in many abiotic stress responses as well as flavonol and anthocyanin biosynthesis. In grapes ( Vitis vinifera L.), flavonols including anthocyanins and condensed tannins are most abundant in the skins of the berries. Flavonols are important phytochemicals for viticulture and enology, but grape bHLH genes have rarely been examined. We identified 94 grape bHLH genes in a genome-wide analysis and performed Nr and GO function analyses for these genes...
2018: Frontiers in Plant Science
Nikhil Job, Premachandran Yadukrishnan, Katharina Bursch, Sourav Datta, Henrik Johansson
The Arabidopsis BBX family comprises several positive and negative regulators of photomorphogenesis. BBX24, a member of BBX structural group IV, acts as a negative regulator of photomorphogenesis while another member from the same group, BBX21, is a positive regulator. The molecular basis for the functional diversity shown by these related BBX family members is unknown. Using domain-swap lines, we show that BBX24 can functionally act like BBX21 and vice versa, when their C-terminal regions are interchanged...
February 8, 2018: Plant Physiology
Fengli Zhao, Gang Li, Panpan Hu, Xia Zhao, Liangjie Li, Wei Wei, Jiayue Feng, Houcheng Zhou
As the second largest transcription factor family in plant, the basic helix-loop-helix (bHLH) transcription factor family, characterized by the conserved bHLH domain, plays a central regulatory role in many biological process. However, the bHLH transcription factor family of strawberry has not been systematically identified, especially for the anthocyanin biosynthesis. Here, we identified a total of 113 bHLH transcription factors and described their chromosomal distribution and bioinformatics for the diploid woodland strawberry Fragaria vesca...
February 9, 2018: Scientific Reports
Manuela Ferrero, Chiara Pagliarani, Ondrej Novák, Alessandra Ferrandino, Francesca Cardinale, Ivan Visentin, Andrea Schubert
Besides signalling to soil organisms, strigolactones (SL) control above- and below-ground morphology, in particular shoot branching. Furthermore, SL interact with stress responses, possibly thanks to a cross-talk with the abscisic acid (ABA) signal. In grapevine (Vitis vinifera L.), ABA drives the accumulation of anthocyanins over the ripening season. In this study, we investigated the effects of treatment with a synthetic strigolactone analogue, GR24, on anthocyanin accumulation in grape berries, in presence or absence of exogenous ABA treatment...
February 1, 2018: Journal of Experimental Botany
Nan Li, Han Wu, Qiangqiang Ding, Huihui Li, Zhifei Li, Jing Ding, Yi Li
Anthocyanins are naturally occurring secondary metabolites, responsible for the color of many plants. The Arabidopsis thaliana MYB90/PAP2 (production of anthocyanin pigment 2) was introduced into tomato to study its effect on anthocyanin accumulation. The transgenic tomato displayed much greater anthocyanin accumulation than wild type in all plant organs, but the organs were not fully purple in color except for the stamen. The expression of anthocyanin biosynthetic genes and an anthocyanin-related basic helix-loop-helix (bHLH) gene SlAN1 was significantly increased in the transgenic line, suggesting that ectopic expression of AtPAP2 increases the expression of anthocyanin-related structural and regulatory genes to enhance anthocyanin content...
January 26, 2018: Functional & Integrative Genomics
Min Ho Han, Hong Jae Kim, Jin-Woo Jeong, Cheol Park, Byung Woo Kim, Yung Hyun Choi
Anthocyanins are naturally occurring water-soluble polyphenolic pigments in plants that have been shown to protect against cardiovascular diseases, and certain cancers, as well as other chronic human disorders. However, the anti-obesity effects of anthocyanins are not fully understood. In this study, we investigated the effects of anthocyanins isolated from the fruit of Vitis coignetiae Pulliat on the adipogenesis of 3T3-L1 preadipocytes. Our data indicated that anthocyanins attenuated the terminal differentiation of 3T3-L1 preadipocytes, as confirmed by a decrease in the number of lipid droplets, lipid content, and triglyceride production...
January 2018: Toxicological Research
Nick W Albert, Amali H Thrimawithana, Tony K McGhie, William A Clayton, Simon C Deroles, Kathy E Schwinn, John L Bowman, Brian R Jordan, Kevin M Davies
The flavonoid pathway is hypothesized to have evolved during land colonization by plants c. 450 Myr ago for protection against abiotic stresses. In angiosperms, R2R3MYB transcription factors are key for environmental regulation of flavonoid production. However, angiosperm R2R3MYB gene families are larger than those of basal plants, and it is not known whether the regulatory system is conserved across land plants. We examined whether R2R3MYBs regulate the flavonoid pathway in liverworts, one of the earliest diverging land plant lineages...
January 24, 2018: New Phytologist
Shaowei Duan, Jianjun Wang, Chenhao Gao, Changyu Jin, Dong Li, Danshuai Peng, Guomei Du, Yiqian Li, Mingxun Chen
Previous studies have shown that a plant WRKY transcription factor, WRKY41, has multiple functions, and regulates seed dormancy, hormone signaling pathways, and both biotic and abiotic stress responses. However, it is not known about the roles of AtWRKY41 from the model plant, Arabidopsis thaliana, and its ortholog, BnWRKY41, from the closely related and important oil-producing crop, Brassica napus, in the regulation of anthocyanin biosynthesis. Here, we found that the wrky41 mutation in A. thaliana resulted in a significant increase in anthocyanin levels in rosette leaves, indicating that AtWRKY41 acts as repressor of anthocyanin biosynthesis...
March 2018: Plant Science: An International Journal of Experimental Plant Biology
Da-Hye Kim, Sangkyu Park, Jong-Yeol Lee, Sun-Hwa Ha, Sun-Hyung Lim
Flower color is a main target for flower breeding. A transgenic approach for flower color modification requires a transgene and a flower-specific promoter. Here, we expressed the B-peru gene encoding a basic helix loop helix (bHLH) transcription factor (TF) together with the mPAP1 gene encoding an R2R3 MYB TF to enhance flower color in tobacco (Nicotiana tabacum L.), using the tobacco anthocyanidin synthase (ANS) promoter (PANS) to drive flower-specific expression. The transgenic tobacco plants grew normally and produced either dark pink (PANSBP_DP) or dark red (PANSBP_DR) flowers...
January 20, 2018: International Journal of Molecular Sciences
Xingming Sun, Zhanying Zhang, Chao Chen, Wei Wu, Nannan Ren, Conghui Jiang, Jianping Yu, Yan Zhao, Xiaoming Zheng, Qingwen Yang, Hongliang Zhang, Jinjie Li, Zichao Li
Floral organs in rice (Oryza sativa) can be purple, brown or red in color due to the accumulation of flavonoids. But the molecular mechanism underlying specific organ pigmentation is not clear. Here, we propose a C-S-A gene model for rice hull pigmentation and characterize through genetic, molecular and metabolomic approaches. Further we conduct phylogenetic studies to reveal the evolution of rice color. In this gene system, C1 encodes a R2R3-MYB transcription factor and acts as a color-producing gene and S1 encodes a bHLH protein that functions in a tissue-specific manner...
January 18, 2018: Journal of Experimental Botany
Fang Liu, Yuanjun Yang, Jianwei Gao, Changle Ma, Yuping Bi
In this study, a red mutant was obtained through in vitro regeneration of a wild purple potato. High-performance liquid chromatography and Mass spectrometry analysis revealed that pelargonidin-3-O-glucoside and petunidin-3-O-glucoside were main anthocyanins in the mutant and wild type tubers, respectively. In order to thoroughly understand the mechanism of anthocyanin transformation in two materials, a comparative transcriptome analysis of the mutant and wild type was carried out through high-throughput RNA sequencing, and 295 differentially expressed genes (DEGs) were obtained...
2018: PloS One
Jorge González-Villagra, Acácio Rodrigues-Salvador, Adriano Nunes-Nesi, Jerry D Cohen, Marjorie M Reyes-Díaz
Drought stress is the most important stress factor for plants, being the main cause of agricultural crop loss in the world. Plants have developed complex mechanisms for preventing water loss and oxidative stress such as synthesis of abscisic acid (ABA) and non-enzymatic antioxidant compounds such as anthocyanins, which might help plants to cope with abiotic stress as antioxidants and for scavenging reactive oxygen species. A. chilensis (Mol.) is a pioneer species, colonizing and growing on stressed and disturbed environments...
January 12, 2018: Plant Physiology and Biochemistry: PPB
Aung Htay Naing, Ji Hye Lee, Kyeung Il Park, Kyoung-Ook Kim, Mi Young Chung, Chang Kil Kim
We analyzed the expression of anthocyanin biosynthesis genes and transcription factors (TFs) in the Gerbera hybrida cultivars 'Bintang' and 'Alliance' that exhibit different coloration patterns. Differential expression of biosynthesis genes and TFs was associated with variable anthocyanin content at different flower developmental stages (S1-S3) in both cultivars; higher anthocyanin content was correlated with higher levels of gene expression. Exposure to different temperatures (6 and 22 °C) also resulted in different anthocyanin content levels: the lower temperature (6 °C) enhanced anthocyanin content compared to the higher temperature (22 °C)...
January 2018: 3 Biotech
Anju Bajpai, Kasim Khan, M Muthukumar, S Rajan, Nagendra Kumar Singh
Mango fruit is cherished by masses for its taste and nutrition, contributed by color, flavor and aroma. Among these, peel color is an important trait contributing to fruit quality and market value. We attempted to elucidate the role of key genes of anthocyanin biosynthesis pathway related to fruit peel color from the leaf transcriptome of cv. Amrapali. A total of 108 mined transcript sequences were assigned to phenylpropanoid flavonoid pathway from which 15 contigs representing anthocyanin biosynthesis genes were annotated...
January 16, 2018: Genome Génome / Conseil National de Recherches Canada
Alexander Pfab, Matthias Breindl, Klaus D Grasser
The histone chaperone FACT is involved in the expression of genes encoding anthocyanin biosynthetic enzymes also upon induction by moderate high-light and therefore contributes to the stress-induced plant pigmentation. The histone chaperone FACT consists of the SSRP1 and SPT16 proteins and associates with transcribing RNAPII (RNAPII) along the transcribed region of genes. FACT can promote transcriptional elongation by destabilising nucleosomes in the path of RNA polymerase II, thereby facilitating efficient transcription of chromatin templates...
January 13, 2018: Plant Molecular Biology
Xiujuan He, Xuecheng Zhao, Liping Gao, Xingxing Shi, Xinlong Dai, Yajun Liu, Tao Xia, Yunsheng Wang
There were several high concentrations of flavonoid components in tea leaves that present health benefits. A novel purple-leaf tea variety, 'Mooma1', was obtained from the natural hybrid population of Longjing 43 variety. The buds and young leaves of 'Mooma1' were displayed in bright red. HPLC and LC-MS analysis showed that anthocyanins and O-Glycosylated flavonols were remarkably accumulated in the leaves of 'Mooma1', while the total amount of catechins in purple-leaf leaves was slightly decreased compared with the control...
January 9, 2018: Scientific Reports
Jang-Kyun Seo, Mi-Kyeong Kim, Hae-Ryun Kwak, Hong-Soo Choi, Moon Nam, Junkyoung Choe, Boram Choi, Soo-Jung Han, Jin-Ho Kang, Choonkyun Jung
The viral infection of plants may cause various physiological symptoms associated with the reprogramming of plant gene expression. However, the molecular mechanisms and associated genes underlying disease symptom development in plants infected with viruses are largely unknown. In this study, we employed RNA sequencing for in-depth molecular characterization of the transcriptional changes associated with the development of distinct symptoms induced by tomato chlorosis virus (ToCV) and tomato yellow leaf curl virus (TYLCV) in tomato...
January 6, 2018: Virology
Rebecca A Henry-Kirk, Blue Plunkett, Miriam Hall, Tony McGhie, Andrew C Allan, Jason J Wargent, Richard V Espley
Ultraviolet-B light (UV-B) is one environmental signal perceived by plants that affects the flavonoid pathway and influences the levels of anthocyanins, flavonols and proanthocyanidins. To understand the mechanisms underlying UV exposure, apple trees were grown under spectral filters that altered transmission of solar UV light. Fruit analysis showed that UV induced changes in physiology, metabolism and gene expression levels during development over a season. These changes were sustained after storage. Under low UV ripening was delayed, fruit size decreased, and anthocyanin and flavonols were reduced...
January 6, 2018: Plant, Cell & Environment
Yali Zhou, Chunlong Yuan, Shicheng Ruan, Zhenwen Zhang, Jiangfei Meng, Zhumei Xi
Anthocyanins and proanthocyanidins (PAs) are crucial factors that affect the quality of grapes and the making of wine, which were stimulated by various stimuli and environment factors (sugar, hormones, light, and temperature). The aim of the study was to investigate the influence of exogenous 24-Epibrassinolide (EBR) and light on the mechanism of anthocyanins and PAs accumulation in grape berries. Grape clusters were sprayed with EBR (0.4 mg/L) under light and darkness conditions (EBR + L, EBR + D), or sprayed with deionized water under light and darkness conditions as controls (L, D), at the onset of veraison...
January 9, 2018: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
Pengcheng Li, Cancan Du, Yingying Zhang, Shuangyi Yin, Enying Zhang, Huimin Fang, Dezhou Lin, Chenwu Xu, Zefeng Yang
Anthocyanin accumulation in various maize tissues plays important roles in plant growth and development. In addition, some color-related traits can be used as morphological markers in conventional maize breeding processes and purity identification of hybrid seeds. Here, we noticed that the leaf sheath color was controlled by a dominant gene, because purple (PSH) and green leaf sheaths (GSH) were separated at a ratio of 3:1 in an F2 population. To map the gene, an F2 and a recombinant inbred line (RIL) population were derived from a cross between inbred line T877 (PSH) and DH1M (GSH)...
2018: PloS One
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