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R2r3 myb

Qing Qian Ding, Xiao Ting Wang, Li Qin Hu, Xin Qi, Lin Hao Ge, Wei Ya Xu, Zhao Shi Xu, Yong Bin Zhou, Guan Qing Jia, Xian Min Diao, Dong Hong Min, You Zhi Ma, Ming Chen
Myeloblastosis (MYB) transcription factors are one of the largest families of transcription factors in higher plants. They play an important role in plant development, defense response processes, and non-biological stresses, i.e., drought stress. Foxtail millet (Setaria italica L.), originated in China, is resistant to drought and low nutrition stresses and has been regarded as an ideal material for studying abiotic stress resistance in monocotyledon. In this study, we ran a transcription profile analysis of zheng 204 under low-nitrogen conditions and identified a MYB-like transcription factor SiMYB42, which was up-regulated under low-nitrogen stress...
April 20, 2018: Yi Chuan, Hereditas
Muhammad Anwar, Guiqing Wang, Jiacheng Wu, Saquib Waheed, Andrew C Allan, Lihui Zeng
R2R3 MYB transcription factors play key functions in the regulation of secondary metabolites. In the present study, a R2R3 MYB transcriptional factor NtMYB2 was identified from Chinese narcissus ( Narcissus tazetta L. var. Chinensis Roem) and functionally characterized. NtMYB2 belongs to subgroup 4 of the R2R3 MYB transcription factor family that are related to repressor MYBs involved in the regulation of anthocyanin and flavonoids. Transient expression confirmed that NtMYB2 strongly reduced the red pigmentation induced by MYB- anthocyanin activators in agro-infiltrated tobacco leaves...
March 28, 2018: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
Xiaolan Jiang, Keyi Huang, Guangshun Zheng, Hua Hou, Peiqiang Wang, Han Jiang, Xuecheng Zhao, Mingzhuo Li, Shuxiang Zhang, Yajun Liu, Liping Gao, Lei Zhao, Tao Xia
Tea is one of the most widely consumed nonalcoholic beverages worldwide. Polyphenols are nutritional compounds present in the leaves of tea plants. Although numerous genes are functionally characterized to encode enzymes that catalyze the formation of diverse polyphenolic metabolites, transcriptional regulation of those different pathways such as late steps of the proanthcoyanidin (PA) pathway remains unclear. In this study, using different tea transcriptome databases, we screened at least 140 R2R3-MYB transcription factors (TFs) and grouped them according to the basic function domains of the R2R3 MYB TF superfamily...
May 2018: Plant Science: An International Journal of Experimental Plant Biology
Won Tae Yang, Dongwon Baek, Dae-Jin Yun, Kwang Sik Lee, So Yeon Hong, Ki Deuk Bae, Young Soo Chung, Yong Sham Kwon, Du Hyun Kim, Ki Hong Jung, Doh Hoon Kim
Myeloblastosis (MYB) transcription factors play central roles in plant developmental processes and in responses to nutrient deficiency. In this study, OsMYB5P, an R2R3-MYB transcription factor, was isolated and identified from rice (Oryza sativa L. 'Dongjin') under inorganic phosphate (Pi)-deficient conditions. OsMYB5P protein is localized to the nucleus and functions as a transcription activator in plant development. Overexpression of OsMYB5P in rice and Arabidopsis (Arabidopsis thaliana Col-0) increases tolerance to phosphate starvation, whereas OsMYB5P knock-out through RNA interference increases sensitivity to Pi depletion in rice...
2018: PloS One
Alessandro Vannozzi, Darren Chern Jan Wong, Janine Höll, Ibrahim Hmmam, José Tomás Matus, Jochen Bogs, Tobias Ziegler, Ian Dry, Gianni Barcaccia, Margherita Lucchin
Stilbene synthase (STS) is the key enzyme leading to the biosynthesis of resveratrol. Recently we reported two R2R3-MYB transcription factor (TF) genes that regulate the stilbene biosynthetic pathway in grapevine: VviMYB14 and VviMYB15. These genes are strongly co-expressed with STS genes under a range of stress and developmental conditions, in agreement with the specific activation of STS promoters by these TFs. Genome-wide gene co-expression analysis using two separate transcriptome compendia based on microarray and RNA sequencing data revealed that WRKY TFs were the top TF family correlated with STS genes...
May 1, 2018: Plant & Cell Physiology
Yuxuan He, Xiangdong Yang, Chong Xu, Dongquan Guo, Lu Niu, Ying Wang, Jingwen Li, Fan Yan, Qingyu Wang
Myeloblastosis (MYB) transcription factor (TF) plays a positive role in the growth and stress response of plants; however, information on the functions of MYB repressors in soybean is limited. In the present study, the gene GmMYB3a was identified and characterized as a member of the R2R3 MYB repressor family, which is induced by various abiotic stresses. To understand the functions of GmMYB3a, a transgenic soybean over-expressing GmMYB3a was obtained and the photosynthetic index under salt-alkali treatments was evaluated...
April 6, 2018: Biochemical and Biophysical Research Communications
Jareerat Chunthawodtiporn, Theresa Hill, Kevin Stoffel, Allen Van Deynze
Bell pepper ( L.) is a group of fruit vegetables that has large variation in fruit shape, fruit size, and horticultural traits. Using unadapted sources of germplasm to bring in novel alleles while maintaining favorable quality and horticultural traits is challenging for breeding in pepper. A genetic map with 318 loci from genotype-by-sequencing (GBS) and single nucleotide polymorphism assays was generated from a recombinant inbred line population derived from a cultivated bell-type 'Maor' and a landrace highly resistant to , 'Criollo de Morelos-334'...
March 2018: Plant Genome
Xue Liu, Dayong Li, Donglei Zhang, Dedong Yin, Yi Zhao, Chengjun Ji, Xianfeng Zhao, Xiaobing Li, Qun He, Runsheng Chen, Songnian Hu, Lihuang Zhu
Natural antisense long noncoding RNAs (lncRNAs) are widespread in many organisms. However, their biological functions remain largely unknown, particularly in plants. We report the identification and characterization of an endogenous lncRNA, TWISTED LEAF (TL), which is transcribed from the opposite strand of the R2R3 MYB transcription factor gene locus, OsMYB60, in rice (Oryza sativa). TL and OsMYB60 were found to be coexpressed in many different tissues, and the expression level of TL was higher than that of OsMYB60...
April 2018: New Phytologist
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 it through genetic, molecular, and metabolomic approaches. Furthermore, we conducted 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...
March 24, 2018: Journal of Experimental Botany
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
Peng Jiang, Mark Rausher
A major premise in evolutionary developmental biology is that regulatory changes, often involving cis-regulatory elements, are responsible for much morphological evolution. This premise is supported by recent investigations of animal development, but information is just beginning to accumulate regarding whether it also applies to the evolution of plant morphology1-4 . Here, we identify the genetic differences between species in the genus Clarkia that are responsible for evolutionary change in an ecologically important element of floral colour patterns: spot position...
January 2018: Nature Plants
Qiuhui Wei, Fan Zhang, Fusheng Sun, Qingchen Luo, Ruibin Wang, Rui Hu, Mingjie Chen, Junli Chang, Guangxiao Yang, Guangyuan He
MYB transcription factors are involved in the regulation of plant development and response to biotic and abiotic stress. In this study, TaMyb1D, a novel subgroup 4 gene of the R2R3-MYB subfamily, was cloned from wheat (Triticum aestivum L.). TaMyb1D was localized in the nucleus and functioned as a transcriptional repressor. The overexpression of TaMyb1D in tobacco (Nicotiana tabacum) plants repressed the expression of genes related to phenylpropanoid metabolism and down-regulated the accumulation of lignin in stems and flavonoids in leaves...
December 2017: Plant Science: An International Journal of Experimental Plant Biology
Ziran Wang, Yuanyuan Cui, Alexander Vainstein, Shangwu Chen, Huiqin Ma
Combined metabolomic and transcriptomic analyses were carried out with fig cultivar Green Peel and its color mutant "Purple Peel." Five and twenty-two metabolites were identified as having significantly different contents between fruit peels of the two cultivars at young and mature stages, respectively. Cyanidin O-malonylhexoside demonstrated a 3,992-fold increase in the mature purple peel, the first identification of a major cyanidin in fig fruit; cyanidin 3-O-glucoside, cyanidin O-malonylhexoside O-hexoside and cyanidin-3,5-O-diglucoside were upregulated 100-fold, revealing the anthocyanins underlying the purple mutation...
2017: Frontiers in Plant Science
Wenbin Li, Zehong Ding, Mengbin Ruan, Xiaoling Yu, Ming Peng, Yifei Liu
Red kiwifruit (Actinidia chinensis) is a popular fresh fruit with a high market value due to its unique color, caused by anthocyanin accumulation. The R2R3-MYB transcription factors (TFs) have important roles in plant development and anthocyanin metabolism. In this first comprehensive study of R2R3-MYBs in kiwifruit, a total of 93 R2R3-MYB genes, including five novel previously unannotated AcMYBs, were identified. Their phylogenic relationship, exon-intron structures, and conserved motifs were analyzed. Based on transcriptome data, 60 AcMYBs were expressed (FPKM > 1) across seven developmental stages of kiwifruit, revealing five expression patterns...
December 4, 2017: Scientific Reports
Xue Cao, Zhengkun Qiu, Xiaotian Wang, Tong Van Giang, Xiaolin Liu, Jing Wang, Xiaoxuan Wang, Jianchang Gao, Yanmei Guo, Yongchen Du, Guoping Wang, Zejun Huang
Anthocyanins are potential health-promoting compounds in the human diet. The atv (atroviolacium) locus, derived from the wild tomato species Solanum cheesmaniae, has been shown to enhance anthocyanin pigmentation in tomato fruit when it co-exists with either the Aft (Anthocyanin fruit) or the Abg (Aubergine) locus. In the present study, the atv locus was fine-mapped to an approximately 5.0-kb interval on chromosome 7. A putative R3 MYB repressor was identified in this interval and is hereby designated as SlMYBATV...
December 16, 2017: Journal of Experimental Botany
Bahaeldeen Babikar Mohamed, Beenish Aftab, Muhammad Bilal Sarwar, Bushra Rashid, Zarnab Ahmad, Sameera Hassan, Tayyab Husnain
Various regulatory proteins play a fundamental role to manage the healthy plant growth under stress conditions. Differential display reverse transcriptase PCR and random amplification of cDNA ends (RACE) was used to explore the osmotic stress-responsive transcripts. We identified and characterized the salt stress-responsive R2R3 type RMYB transcription factor from Hibiscus sabdariffa which has an open reading frame of 690 bp, encoding 229 long chain amino acids. In silico analysis confirmed the conserved R2 and R3 domain as well as an NLS-1 localization site...
2017: International Journal of Genomics
Ran Li, Vaishnavi Amarr Reddy, Jingjing Jin, Chakaravarthy Rajan, Qian Wang, Genhua Yue, Chin Huat Lim, Nam-Hai Chua, Jian Ye, Rajani Sarojam
BACKGROUND: Oil palm is the most productive oil crop and the efficiency of pollination has a direct impact on the yield of oil. Pollination by wind can occur but maximal pollination is mediated by the weevil E. kamerunicus. These weevils complete their life cycle by feeding on male flowers. Attraction of weevils to oil palm flowers is due to the emission of methylchavicol by both male and female flowers. In search for male flowers, the weevils visit female flowers by accident due to methylchavicol fragrance and deposit pollen...
November 23, 2017: BMC Plant Biology
Feng-Zhu Wang, Mo-Xian Chen, Lu-Jun Yu, Li-Juan Xie, Li-Bing Yuan, Hua Qi, Ming Xiao, Wuxiu Guo, Zhe Chen, Keke Yi, Jianhua Zhang, Rongliang Qiu, Wensheng Shu, Shi Xiao, Qin-Fang Chen
Bioaccumulation of arsenic (As) in rice ( Oryza sativa ) increases human exposure to this toxic, carcinogenic element. Recent studies identified several As transporters, but the regulation of these transporters remains unclear. Here, we show that the rice R2R3 MYB transcription factor OsARM1 (ARSENITE-RESPONSIVE MYB1) regulates As-associated transporters genes. Treatment with As(III) induced OsARM1 transcript accumulation and an OsARM1-GFP fusion localized to the nucleus. Histochemical analysis of OsARM1pro::GUS lines indicated that OsARM1 was expressed in the phloem of vascular bundles in basal and upper nodes...
2017: Frontiers in Plant Science
Cyril Brendolise, Richard V Espley, Kui Lin-Wang, William Laing, Yongyan Peng, Tony McGhie, Supinya Dejnoprat, Sumathi Tomes, Roger P Hellens, Andrew C Allan
In apple, the MYB transcription factor MYB10 controls the accumulation of anthocyanins. MYB10 is able to auto-activate its expression by binding its own promoter at a specific motif, the R1 motif. In some apple accessions a natural mutation, termed R6, has more copies of this motif within the MYB10 promoter resulting in stronger auto-activation and elevated anthocyanins. Here we show that other anthocyanin-related MYBs selected from apple, pear, strawberry, petunia, kiwifruit and Arabidopsis are able to activate promoters containing the R6 motif...
2017: Frontiers in Plant Science
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