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Camellia sinensis

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https://www.readbyqxmd.com/read/28339202/a-novel-acylated-flavonol-tetraglycoside-with-inhibitory-effect-on-lipid-accumulation-in-3t3-l1-cells-from-lu-an-guapian-tea-and-quantification-of-flavonoid-glycosides-in-six-major-processing-types-of-tea-running-title-a-novel-acylated-flavonol-tetraglycoside
#1
Wu-Xia Bai, Chao Wang, Yijun Wang, Wen-Jun Zheng, Wei Wang, Xiaochun Wan, Guan-Hu Bao
A novel acylated flavonol tetraglycoside, kaempferol 3-O-[(E)-p- coumaroyl-(1→2)][α-L-arabinopyranosyl-(1→3)][β-D-glucopyranosyl (1→3)-α-L- rhamnopyranosyl (1→6)]-β-D-glucopyranoside (camellikaempferoside C, 1), together with two flavonol and eighteen flavone and flavonol glycosides (FGs) (2-21) was isolated from the green tea Lu'an GuaPian (Camellia sinensis L.O. Kuntze). Their structures were identified by spectroscopic and chemical methods. Four acylated FGs (1, 7, 8, 9) were found to inhibit the proliferation and differentiation of 3T3-L1 preadipocytes at the concentrations 25, 50, 100 µM (P < 0...
March 24, 2017: Journal of Agricultural and Food Chemistry
https://www.readbyqxmd.com/read/28334275/identification-of-a-novel-bzip-transcription-factor-in-camellia-sinensis-as-a-negative-regulator-of-freezing-tolerance-in-transgenic-arabidopsis
#2
Lu Wang, Hongli Cao, Wenjun Qian, Lina Yao, Xinyuan Hao, Nana Li, Yajun Yang, Xinchao Wang
Background and Aims: Basic region/leucine zipper (bZIP) transcription factors play vital roles in the abiotic stress response of plants. However, little is known about the function of bZIP genes in Camellia sinensis . Methods: CsbZIP6 was overexpressed in Arabidopsis thaliana . Effects of CsbZIP6 overexpression on abscisic acid (ABA) sensitivity, freezing tolerance and the expression of cold-responsive genes in arabidopsis were studied. Key Results: CsbZIP6 was induced during cold acclimation in tea plant...
March 14, 2017: Annals of Botany
https://www.readbyqxmd.com/read/28332598/metabolic-flux-redirection-and-transcriptomic-reprogramming-in-the-albino-tea-cultivar-yu-jin-xiang-with-an-emphasis-on-catechin-production
#3
Guo-Feng Liu, Zhuo-Xiao Han, Lin Feng, Li-Ping Gao, Ming-Jun Gao, Margaret Y Gruber, Zhao-Liang Zhang, Tao Xia, Xiao-Chun Wan, Shu Wei
In this study, shade-induced conversion from a young pale/yellow leaf phenotype to a green leaf phenotype was studied using metabolic and transcriptomic profiling and the albino cultivar 'Yu-Jin-Xiang' ('YJX') of Camellia sinensis for a better understanding of mechanisms underlying the phenotype shift and the altered catechin and theanine production. Shaded leaf greening resulted from an increase in leaf chlorophyll and carotenoid abundance and chloroplast development. A total of 1,196 differentially expressed genes (DEGs) were identified between the 'YJX' pale and shaded green leaves, and these DEGs affected 'chloroplast organization' and 'response to high light' besides many other biological processes and pathways...
March 23, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28322995/a-putative-12-oxophytodienoate-reductase-gene-csopr3-from-camellia-sinensis-is-involved-in-wound-and-herbivore-infestation-responses
#4
Zhaojun Xin, Jin Zhang, Lingang Ge, Shu Lei, Juanjuan Han, Xin Zhang, Xiwang Li, Xiaoling Sun
12-Oxophytodienoate reductase (OPR) is a key enzyme in the biosynthesis of jasmonic acid (JA), which plays an important role in plant defense responses. Although multiple isoforms of OPRs have been identified in various annual herbaceous plants, genes encoding these enzymes in perennial woody plants have yet to be fully investigated. In the tea plant, Camellia sinensis (L.), no OPR genes have been isolated, and their possible roles in tea plant development and defense mechanism remain unknown. In this study, a putative OPR gene, designated as CsOPR3, was isolated from tea plants for the first time through the rapid amplification of cDNA ends...
March 16, 2017: Gene
https://www.readbyqxmd.com/read/28314435/effect-of-green-tea-camellia-sinensis-extract-and-pre-freezing-equilibration-time-on-the-post-thawing-quality-of-ram-semen-cryopreserved-in-a-soybean-lecithin-based-extender
#5
Mahdieh Mehdipour, Hossein Daghigh Kia, Abouzar Najafi, Hossein Vaseghi Dodaran, Olga García-Álvarez
The aim of this study was to determine the effect of Camellia sinensis extract as antioxidant supplement and pre-freezing equilibration times in a soybean lecithin extender for freezing ram semen. In this study, a total of 20 ejaculates were collected from four Ghezel rams and diluted with extenders (1.5% soybean lecithin, 7% glycerol) containing no supplements (control) and Camellia sinensis extract (5, 10, and 15 mg/L) and cryopreserved, immediately after thermal equilibrium was reached at 5 °C (0 h), or 4 h after equilibration...
December 2016: Cryobiology
https://www.readbyqxmd.com/read/28302787/draft-genome-sequence-of-endophytic-herbaspirillum-sp-strain-wt00c-a-tea-plant-growth-promoting-bacterium
#6
Wei Cheng, Guiting Zhan, Weilin Liu, Rong Zhu, Xuejing Yu, Yang Li, Yadong Li, Wenhua Wu, Xingguo Wang
Endophytic Herbaspirillum sp. strain WT00C was isolated from tea plant (Camellia sinensis L.). Here, we report the 6.08 Mb draft genome sequence of this strain, providing bioinformation about its agronomic benefits and capability to reduce selenate/selenite into red elemental selenium.
March 16, 2017: Genome Announcements
https://www.readbyqxmd.com/read/28301607/green-tea-proanthocyanidins-cause-impairment-of-hormone-regulated-larval-development-and-reproductive-fitness-via-repression-of-juvenile-hormone-acid-methyltransferase-insulin-like-peptide-and-cytochrome-p450-genes-in-anopheles-gambiae-sensu-stricto
#7
Jackson M Muema, Steven G Nyanjom, James M Mutunga, Sospeter N Njeru, Joel L Bargul
Successful optimization of plant-derived compounds into control of nuisance insects would benefit from scientifically validated targets. However, the close association between the genotypic responses and physiological toxicity effects mediated by these compounds remains underexplored. In this study, we evaluated the sublethal dose effects of proanthocyanidins (PAs) sourced from green tea (Camellia sinensis) on life history traits of Anopheles gambiae (sensu stricto) mosquitoes with an aim to unravel the probable molecular targets...
2017: PloS One
https://www.readbyqxmd.com/read/28294073/alcohol-induced-hepato-cardiotoxicity-and-oxidative-damage-in-rats-the-protective-effect-of-n-butanol-extract-of-green-tea-camellia-sinensis-l-kuntze
#8
Amel Amrani, Nassima Boubekri, Soumia Lassad, Djamila Zama, Fadila Benayache, Samir Benayache
BACKGROUND: The principal aim of this study was to investigate the oxidative effects of acute alcohol consumption on the functions of the heart and the liver and the possible modification of this effect by Phenolic compounds from n-butanol extract of Camellia sinensis supplementation. METHOD: Three experimental groups of rats were used: control, ethanol-exposed (40% v/v, 5 g/kg per oral every 12 hours for 3 doses, binge model), and ethanol-exposed plus n-butanol extract of Camellia sinensis (100 mg/kg once a day for three days before and simultaneously with ethanol administration)...
March 9, 2017: Cardiovascular & Hematological Disorders Drug Targets
https://www.readbyqxmd.com/read/28292023/green-tea-and-its-anti-angiogenesis-effects
#9
REVIEW
Bahman Rashidi, Mehrnoush Malekzadeh, Mohammad Goodarzi, Aria Masoudifar, Hamed Mirzaei
The development of new blood vessels from a pre-existing vasculature (also known as angiogenesis) is required for many physiological processes including embryogenesis and post-natal growth. However, pathological angiogenesis is also a hallmark of cancer and many ischaemic and inflammatory diseases. The pro-angiogenic members of the VEGF family (vascular endothelial growth factor family), VEGF-A, VEGF-B, VEGF-C, VEGF-D and placental growth factor (PlGF), and the related receptors, VEGFR-1, VEGFR-2 and VEGFR-3 have a central and decisive role in angiogenesis...
March 8, 2017: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/28289384/theabrownin-inhibits-cell-cycle-progression-and-tumor-growth-of-lung-carcinoma-through-c-myc-related-mechanism
#10
Li Zhou, Feifei Wu, Wangdong Jin, Bo Yan, Xin Chen, Yingfei He, Weiji Yang, Wenlin Du, Qiang Zhang, Yonghua Guo, Qiang Yuan, Xiaoqiao Dong, Wenhua Yu, Jin Zhang, Luwei Xiao, Peijian Tong, Letian Shan, Thomas Efferth
Green tea, the fresh leaves of Camellia sinensis, is not only a health-promoting beverage but also a traditional Chinese medicine used for prevention or treatment of cancer, such as lung cancer. Theabrownin (TB) is the main fraction responsible for the medicinal effects of green tea, but whether it possesses anti-cancer effect is unknown yet. This study aimed to determine the in vitro and in vivo anti-lung cancer effect of TB and explore the underlying molecular mechanism, by using A549 cell line and Lewis lung carcinoma-bearing mice...
2017: Frontiers in Pharmacology
https://www.readbyqxmd.com/read/28273866/camellia-sinensis-l-extract-and-its-potential-beneficial-effects-in-antioxidant-anti-inflammatory-anti-hepatotoxic-and-anti-tyrosinase-activities
#11
Surached Thitimuta, Pimolpan Pithayanukul, Saruth Nithitanakool, Rapepol Bavovada, Jiraporn Leanpolchareanchai, Patchreenart Saparpakorn
The aims of this study were to investigate the potential benefits of antioxidant, anti-inflammatory, anti-hepatotoxic, and anti-tyrosinase activities of a methanolic extract of fresh tea leaves (FTE) (Camellia sinensis L.). The antioxidant capacity was investigated using three different methods at different temperatures. The anti-inflammatory activity was studied in vitro by the inhibition of 5-lipoxygenase assay. The anti-hepatotoxic effect was investigated in CCl₄-induced liver injury in rats. The anti-tyrosinase activities of the FTE and its principal phenolic compounds were investigated in l-3,4-dihydroxyphenylalanine (l-DOPA) oxidation by a mushroom tyrosinase...
March 4, 2017: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/28271712/molecular-cloning-and-characterization-of-galactinol-synthases-in-camellia-sinensis-with-different-responses-to-biotic-and-abiotic-stressors
#12
Yu Zhou, Yan Liu, Shuangshuang Wang, Cong Shi, Ran Zhang, Jia Rao, Xu Wang, Xungang Gu, Yunsheng Wang, Daxiang Li, Chaoling Wei
Galactinol synthase (GolS) is a key biocatalyst for the synthesis of raffinose family oligosaccharides (RFOs). RFOs accumulation plays a critical role in abiotic stress adaptation, but the relationship between expression of GolS genes and biotic stress adaptation remains unclear. In this study, two GolS genes were found to be highly up-regulated in a transcriptome library of Ectropic oblique-attacked Camellia sinensis. Three complete GolS genes were then cloned and characterized. Gene transcriptional analyses under biotic and abiotic stress conditions indicated that the CsGolS1 isoform was sensitive to water deficit, low temperature, and abscisic acid, while CsGolS2 and CsGolS3 were sensitive to pest attack and phytohormones...
March 8, 2017: Journal of Agricultural and Food Chemistry
https://www.readbyqxmd.com/read/28252101/sclereids-are-strong-enough-to-support-the-delicate-corollas-experimental-and-computational-data-evidence-from-camellia-sinensis-l
#13
Wei Zhang, Yuanyuan Xue, Shuo Yang, Yangang Wang, Hong Zhao
Sclereids are a fundamental cell type that widely exist in higher plants and are generally thought to have a mechanical function. However, the occurrence of sclereids in the ephemeral corolla has rarely been documented and their biological significance is poorly understood. In this study, flower buds from Camellia sinensis at various ontogenetic stages were sampled, cleared, sectioned, stained, and examined using light microscopy to ascertain the morphology and distribution of sclereids and their variation...
March 2, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28250662/synergisms-in-alpha-glucosidase-inhibition-and-antioxidant-activity-of-camellia-sinensis-l-kuntze-and-eugenia-uniflora-l-ethanolic-extracts
#14
Juliana Vinholes, Márcia Vizzotto
BACKGROUND: Camellia sinensis, the most consumed and popular beverages worldwide, and Eugenia uniflora, a Brazilian native species, have been already confirmed to have beneficial effects in the treatment of diabetes mellitus. However, their potential acting together against an enzyme linked to this pathology has never been exploited. OBJECTIVE: The aim of this study was to evaluate the inhibitory properties of individual and combined ethanolic extracts of the leaves of C...
January 2017: Pharmacognosy Research
https://www.readbyqxmd.com/read/28236273/developmental-processes-and-responses-to-hormonal-stimuli-in-tea-plant-camellia-sinensis-leaves-are-controlled-by-grf-and-gif-gene-families
#15
Zhi-Jun Wu, Wen-Li Wang, Jing Zhuang
Tea plant (Camellia sinensis (L.) O. Kuntze) is an important leaf-type woody crop used for producing of non-alcoholic beverages worldwide. The GROWTH-REGULATING FACTOR (GRF) transcription factors cooperated with GRF-INTERACTING FACTOR (GIF) transcriptional coactivators positively regulate leaf development. In the present study, six GRF and two GIF genes were identified and characterized in the leaf transcriptome of C. sinensis, respectively. The alignment results showed that the feature structures of the predicted homologous GRF and GIF proteins of C...
February 24, 2017: Functional & Integrative Genomics
https://www.readbyqxmd.com/read/28225779/combined-small-rna-and-degradome-sequencing-reveals-complex-microrna-regulation-of-catechin-biosynthesis-in-tea-camellia-sinensis
#16
Ping Sun, Chunzhen Cheng, Yuling Lin, Qiufang Zhu, Jinke Lin, Zhongxiong Lai
MicroRNAs are endogenous non-coding small RNAs playing crucial regulatory roles in plants. Tea, a globally popular non-alcoholic drink, is rich in health-enhancing catechins. In this study, 69 conserved and 47 novel miRNAs targeting 644 genes were identified by high-throughout sequencing. Predicted target genes of miRNAs were mainly involved in plant growth, signal transduction, morphogenesis and defense. To further identify targets of tea miRNAs, degradome sequencing and RNA ligase-mediated rapid amplification of 5'cDNA ends (RLM-RACE) were applied...
2017: PloS One
https://www.readbyqxmd.com/read/28221885/antibacterial-and-antiadhesive-activities-of-extracts-from-edible-plants-against-soft-drink-spoilage-by-asaia-spp
#17
Hubert Antolak, Agata Czyzowska, Dorota Kregiel
This study was conducted to investigate the antibacterial and antiadhesive activities of ethanol extracts from five edible plant parts: cinnamon bark ( Cinnamomum zeylanicum ), licorice root ( Glycyrrhiza radix ), nettle leaves ( Urtica dioica ), green tea leaves ( Camellia sinensis ), and elderberry flowers ( Sambucus nigra ). The chemical constituents of the extracts were identified using high-performance liquid chromatography and liquid chromatography plus mass spectrometry. Six strains of Asaia lannensis and Asaia bogorensis bacteria isolated from spoiled commercial fruit-flavored noncarbonated mineral water were used...
January 2017: Journal of Food Protection
https://www.readbyqxmd.com/read/28220704/functional-characterization-of-a-new-tea-camellia-sinensis-flavonoid-glycosyltransferase
#18
Xianqian Zhao, Peiqiang Wang, Mingzhuo Li, Yeru Wang, Xiaolan Jiang, Lilan Cui, Yumei Qian, Juhua Zhuang, Liping Gao, Tao Xia
Tea (Camellia sinensis) is an important commercial crop, in which the high content of flavonoids provides health benefits. A flavonoid glycosyltransferase (CsUGT73A20), belonging to cluster IIIa, was isolated from tea plant. The recombinant CsUGT73A20 in Escherichia coli exhibited a broad substrate tolerance toward multiple flavonoids. Among them, kaempferol was the optimal substrate compared to quercetin, myricetin, naringenin, apigenin, and kaempferide. However, no product was detected when UDP-galactose was used as the sugar donor...
March 3, 2017: Journal of Agricultural and Food Chemistry
https://www.readbyqxmd.com/read/28216091/enantiomeric-and-quantitative-analysis-of-volatile-terpenoids-in-different-teas-camellia-sinensis
#19
Yin Zhu, Chen-Yang Shao, Hai-Peng Lv, Yue Zhang, Wei-Dong Dai, Li Guo, Jun-Feng Tan, Qun-Hua Peng, Zhi Lin
Volatile terpenoids play important roles in the formation of tea aroma quality due to their pleasant scents and low odor thresholds. Most volatile terpenoids contain stereogenic centers, which results in various stereo distributions of their enantiomers and diastereoisomers in different types of tea. However, the distribution characteristics of terpenoid enantiomers in teas were still unclear, which poses an obstacle to the scientific understanding of tea aroma. In this work, a new and efficient analysis approach based on headspace solid phase microextraction (HS-SPME)-chiral gas chromatography-mass spectrometry (GC-MS) was established to analyze 12 pairs of familiar terpenoid enantiomers in different teas...
February 10, 2017: Journal of Chromatography. A
https://www.readbyqxmd.com/read/28193425/black-tea-volatiles-fingerprinting-by-comprehensive-two-dimensional-gas-chromatography-mass-spectrometry-combined-with-high-concentration-capacity-sample-preparation-techniques-toward-a-fully-automated-sensomic-assessment
#20
Federico Magagna, Chiara Cordero, Cecilia Cagliero, Erica Liberto, Patrizia Rubiolo, Barbara Sgorbini, Carlo Bicchi
Tea prepared by infusion of dried leaves of Camellia sinensis (L.) Kuntze, is the second world's most popular beverage, after water. Its consumption is associated with its chemical composition: it influences its sensory and nutritional quality addressing consumer preferences, and potential health benefits. This study aims to obtain an informative chemical signature of the volatile fraction of black tea samples from Ceylon by applying the principles of sensomics. In particular, several high concentration capacity (HCC) sample preparation techniques were tested in combination with GC×GC-MS to investigate chemical signatures of black tea volatiles...
June 15, 2017: Food Chemistry
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