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https://www.readbyqxmd.com/read/29317677/isolation-and-characterization-of-key-genes-that-promote-flavonoid-accumulation-in-purple-leaf-tea-camellia-sinensis-l
#1
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
https://www.readbyqxmd.com/read/29298993/two-genetic-changes-in-cis-regulatory-elements-caused-evolution-of-petal-spot-position-in-clarkia
#2
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
https://www.readbyqxmd.com/read/29223332/a-wheat-myb-transcriptional-repressor-tamyb1d-regulates-phenylpropanoid-metabolism-and-enhances-tolerance-to-drought-and-oxidative-stresses-in-transgenic-tobacco-plants
#3
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
https://www.readbyqxmd.com/read/29209349/regulation-of-fig-ficus-carica-l-fruit-color-metabolomic-and-transcriptomic-analyses-of-the-flavonoid-biosynthetic-pathway
#4
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
https://www.readbyqxmd.com/read/29203778/kiwifruit-r2r3-myb-transcription-factors-and-contribution-of-the-novel-acmyb75-to-red-kiwifruit-anthocyanin-biosynthesis
#5
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
https://www.readbyqxmd.com/read/29186488/a-putative-r3-myb-repressor-is-the-candidate-gene-underlying-atroviolacium-a-locus-for-anthocyanin-pigmentation-in-tomato-fruit
#6
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...
November 25, 2017: Journal of Experimental Botany
https://www.readbyqxmd.com/read/29181384/identification-and-characterization-of-the-diverse-stress-responsive-r2r3-rmyb-transcription-factor-from-hibiscus-sabdariffa-l
#7
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
https://www.readbyqxmd.com/read/29169327/comparative-transcriptome-analysis-of-oil-palm-flowers-reveals-an-ear-motif-containing-r2r3-myb-that-modulates-phenylpropene-biosynthesis
#8
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
https://www.readbyqxmd.com/read/29163593/osarm1-an-r2r3-myb-transcription-factor-is-involved-in-regulation-of-the-response-to-arsenic-stress-in-rice
#9
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
https://www.readbyqxmd.com/read/29163590/multiple-copies-of-a-simple-myb-binding-site-confers-trans-regulation-by-specific-flavonoid-related-r2r3-mybs-in-diverse-species
#10
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
https://www.readbyqxmd.com/read/29157199/characterization-of-wheat-myb-genes-responsive-to-high-temperatures
#11
Yue Zhao, Xuejun Tian, Fei Wang, Liyuan Zhang, Mingming Xin, Zhaorong Hu, Yingyin Yao, Zhongfu Ni, Qixin Sun, Huiru Peng
BACKGROUND: Heat stress is one of the most crucial environmental factors, which reduces crop yield worldwide. In plants, the MYB family is one of the largest families of transcription factors (TFs). Although some wheat stress-related MYB TFs have been characterized, their involvement in response to high-temperature stress has not been properly studied. RESULTS: Six novel heat-induced MYB genes were identified by comparison with previously established de novo transcriptome sequencing data obtained from wheat plants subjected to heat treatment; genomic and complete coding sequences of these genes were isolated...
November 21, 2017: BMC Plant Biology
https://www.readbyqxmd.com/read/29149417/spl13-regulates-shoot-branching-and-flowering-time-in-medicago-sativa
#12
Ruimin Gao, Margaret Y Gruber, Lisa Amyot, Abdelali Hannoufa
Our results show SPL13 plays a crucial role in regulating vegetative and reproductive development in Medicago sativa L. (alfalfa), and that MYB112 is targeted and downregulated by SPL13 in alfalfa. We previously showed that transgenic Medicago sativa (alfalfa) plants overexpressing microRNA156 (miR156) show a bushy phenotype, reduced internodal length, delayed flowering time, and enhanced biomass yield. In alfalfa, transcripts of seven SQUAMOSA-PROMOTER BINDING PROTEIN-LIKE (SPL) transcription factors, including SPL13, are targeted for cleavage by miR156...
November 17, 2017: Plant Molecular Biology
https://www.readbyqxmd.com/read/29094211/genetic-and-molecular-characterization-of-photoperiod-and-thermo-sensitive-male-sterility-in-rice
#13
REVIEW
Yourong Fan, Qifa Zhang
A review on photoperiod and temperature-sensitive genic male sterility in rice. Male sterility in plants, facilitating the development of hybrid crops, has made great contribution to crop productivity worldwide. Environment-sensitive genic male sterility (EGMS), including photoperiod-sensitive genic male sterility (PGMS) and temperature-sensitive genic male sterility (TGMS), has provided a special class of germplasms for the breeding of "two-line" hybrids in several crops. In rice, the finding of the PGMS NK58S mutant in 1973 started the journey of research and breeding of two-line hybrids...
November 2, 2017: Plant Reproduction
https://www.readbyqxmd.com/read/29016915/drought-tolerance-conferred-in-soybean-glycine-max-l-by-gmmyb84-a-novel-r2r3-myb-transcription-factor
#14
Nan Wang, Wenxiao Zhang, Mengyin Qin, Shuo Li, Meng Qiao, Zhenhua Liu, Fengning Xiang
MYB-type transcription factors (MYB TFs) play diverse roles in plant development and stress responses. However, the mechanisms underlying the actions of MYB TFs during stress response remain unclear. In this study we identified a R2R3-MYB TF in soybean (Glycine max), denoted GmMYB84, which contributes to drought resistance. Expression of GmMYB84 was induced by drought, salt stress, H2O2 and ABA. Compared with wild-type (WT), GmMYB84-overexpressing soybean mutants (OE lines) exhibited enhanced drought resistance with higher survival rate, longer primary root length, greater proline and reactive oxygen species (ROS) contents, higher antioxidant enzyme activities [peroxidase (POD), catalase (CAT), and superoxide dismutase (SOD)], a lower dehydration rate, and reduced malondialdehyde (MDA) content...
August 9, 2017: Plant & Cell Physiology
https://www.readbyqxmd.com/read/29016897/genome-wide-analysis-and-expression-profile-of-the-myb-genes-in-brachypodium-distachyon
#15
Shoukun Chen, Xin Niu, Yuxiang Guan, Haifeng Li
MYB transcription factors are widespread in plants and play key roles in plant development. Although MYB transcription factors have been thoroughly characterized in many plants, genome-wide analysis of the MYB gene family has not yet been undertaken in Brachypodium distachyon. In this study, 122 BdMYB transcription factors were identified, including 85 MYB-R2R3, 34 MYB-related and 3 MYB-R1R2R3. Phylogenetic analysis showed that BdMYBs, OsMYBs, and AtMYBs with similar functions were clustered in the same sub-group, and the phylogenetic relationships of BdMYB transcription factors were supported by highly conserved motifs and gene structures...
August 29, 2017: Plant & Cell Physiology
https://www.readbyqxmd.com/read/28983314/corrigendum-ectopic-expression-of-the-grape-hyacinth-muscari-armeniacum-r2r3-myb-transcription-factor-gene-maan2-induces-anthocyanin-accumulation-in-tobacco
#16
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
https://www.readbyqxmd.com/read/28965159/an-r2r3-myb-transcription-factor-ojmyb1-functions-in-anthocyanin-biosynthesis-in-oenanthe-javanica
#17
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
https://www.readbyqxmd.com/read/28940573/positive-regulation-of-ams-by-tdf1-and-the-formation-of-a-tdf1-ams-complex-are-required-for-anther-development-in-arabidopsis-thaliana
#18
Yue Lou, Hai-Sheng Zhou, Yu Han, Qiu-Ye Zeng, Jun Zhu, Zhong-Nan Yang
Tapetum development and pollen production are regulated by a complex transcriptional network that consists of a group of tapetum-specific Arabidopsis transcription factors (TFs). Among these TFs, DEFECTIVE IN TAPETAL DEVELOPMENT AND FUNCTION 1 (TDF1) encodes an R2R3 MYB factor, and ABORTED MICROSPORE (AMS) encodes a basic helix-loop-helix (bHLH) factor. However, knowledge regarding the regulatory role of TDF1 in anther development remains limited. Here, we discovered that TDF1 directly regulates AMS via an AACCT cis-element...
September 20, 2017: New Phytologist
https://www.readbyqxmd.com/read/28922763/chicory-r2r3-myb-transcription-factors-cimyb5-and-cimyb3-regulate-fructan-1-exohydrolase-expression-in-response-to-abiotic-stress-and-hormonal-cues
#19
Hongbin Wei, Hongbo Zhao, Tao Su, Anja Bausewein, Steffen Greiner, Karsten Harms, Thomas Rausch
In the biennial Cichorium intybus, inulin-type fructans accumulate in the taproot during the first year. Upon cold or drought exposure, fructans are degraded by fructan exohydrolases, affecting inulin yield and degree of polymerization. While stress-induced expression of 1-FEH genes has been thoroughly explored, the transcriptional network mediating these responses has remained unknown. In this study, several R2R3-MYB transcriptional regulators were analysed for their possible involvement in 1-FEH regulation via transient transactivation of 1-FEH target promoters and for in vivo co-expression with target genes under different stress and hormone treatments...
July 10, 2017: Journal of Experimental Botany
https://www.readbyqxmd.com/read/28919902/expression-differences-of-pigment-structural-genes-and-transcription-factors-explain-flesh-coloration-in-three-contrasting-kiwifruit-cultivars
#20
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
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