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Camellia sinensis

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https://www.readbyqxmd.com/read/28929453/effects-of-long-term-ingestion-of-white-tea-on-oxidation-produced-by-aging-and-acute-oxidative-damage-in-rats
#1
Cristóbal Espinosa Ruiz, Lorena Cabrera, José Ángel López-Jiménez, Salvador Zamora, Francisca Pérez-Llamas
The infusion tea extracted from the leaves of the plant Camellia sinensis can be used in the prevention of cancer, cardiovascular and neurodegenerative diseases, and aging, while adriamycin (ADR) is an anticancer drug that increases oxidative stress in cells. The present study evaluated the protective effect of the long-term consumption of white tea used at two different doses against the oxidative stress produced by aging and acute oxidation caused ADR treatment. At wearing, rats received distilled water (control), or 0...
September 19, 2017: Journal of Physiology and Biochemistry
https://www.readbyqxmd.com/read/28925957/genome-wide-analysis-of-the-biosynthesis-and-deactivation-of-gibberellin-dioxygenases-gene-family-in-camellia-sinensis-l-o-kuntze
#2
Cheng Pan, Kunhong Tian, Qiuyan Ban, Leigang Wang, Qilu Sun, Yan He, Yuanfei Yang, Yuting Pan, Yeyun Li, Jiayue Jiang, Changjun Jiang
Gibberellins (GAs), a class of diterpenoid phytohormones, play a key role in regulating diverse processes throughout the life cycle of plants. Bioactive GA levels are rapidly regulated by Gibberellin-dioxygenases (GAox), which are involved in the biosynthesis and deactivation of gibberellin. In this manuscript, a comprehensive genome-wide analysis was carried out to find all GAox in Camellia sinensis. For the first time in a tea plant, 14 CsGAox genes, containing two domains, DIOX_N (PF14226) and 2OG-FeII_Oxy, were identified (PF03171)...
September 19, 2017: Genes
https://www.readbyqxmd.com/read/28917145/cell-wall-pectin-methyl-esterification-and-organic-acids-of-root-tips-involve-in-aluminum-tolerance-in-camellia-sinensis
#3
Dongqin Li, Zaifa Shu, Xiaoli Ye, Jiaojiao Zhu, Junting Pan, Weidong Wang, Pinpin Chang, Chuanlei Cui, Jiazhi Shen, Wanping Fang, Xujun Zhu, Yuhua Wang
Tea plant (Camellia sinensis (O.) Kuntze) can survive from high levels of aluminum (Al) in strongly acidic soils. However, the mechanism driving its tolerance to Al, the predominant factor limiting plant growth in acid condition, is still not fully understood. Here, two-year-old rooted cuttings of C. sinensis cultivar 'Longjingchangye' were used for Al resistance experiments. We found that the tea plants grew better in the presence of 0.4 mM Al than those grew under lower concentration of Al treatments (0 and 0...
September 7, 2017: Plant Physiology and Biochemistry: PPB
https://www.readbyqxmd.com/read/28912334/draft-genome-sequence-of-paenibacillus-sp-xy044-a-potential-plant-growth-promoter-isolated-from-a-tea-plant
#4
Huihui Liu, Wenna Shan, Ying Zhou, Xiaomin Yu
Paenibacillus sp. XY044 is an endophytic bacterium isolated from the stem of a tea plant (Camellia sinensis cv. Maoxie). Here, we present the draft genome sequence of XY044, which includes genes encoding features related to plant growth promotion and biocontrol.
September 14, 2017: Genome Announcements
https://www.readbyqxmd.com/read/28912322/draft-genome-sequence-of-streptomyces-sp-xy006-an-endophyte-isolated-from-tea-camellia-sinensis
#5
Wenna Shan, Huihui Liu, Ying Zhou, Xiaomin Yu
Streptomyces sp. XY006 is an endophytic bacterium isolated from the young leaf material of the tea plant (Camellia sinensis). The draft genome consists of 8.2 Mb and encodes 7,415 putative open reading frames. This strain is found to contain a high capacity for the production of natural products.
September 14, 2017: Genome Announcements
https://www.readbyqxmd.com/read/28911667/dna-barcode-and-identification-of-the-varieties-and-provenances-of-taiwan-s-domestic-and-imported-made-teas-using-ribosomal-internal-transcribed-spacer-2-sequences
#6
Shih-Chieh Lee, Chia-Hsiang Wang, Cheng-En Yen, Chieh Chang
The major aim of made tea identification is to identify the variety and provenance of the tea plant. The present experiment used 113 tea plants [Camellia sinensis (L.) O. Kuntze] housed at the Tea Research and Extension Substation, from which 113 internal transcribed spacer 2 (ITS2) fragments, 104 trnL intron, and 98 trnL-trnF intergenic sequence region DNA sequences were successfully sequenced. The similarity of the ITS2 nucleotide sequences between tea plants housed at the Tea Research and Extension Substation was 0...
April 2017: Journal of Food and Drug Analysis
https://www.readbyqxmd.com/read/28911609/antibacterial-and-laxative-activities-of-strictinin-isolated-from-pu-er-tea-camellia-sinensis
#7
Sheng-Kuo Hsieh, Jun-Rui Xu, Nan-Hei Lin, Yue-Chiun Li, Guan-Heng Chen, Ping-Chung Kuo, Wen-Ying Chen, Jason T C Tzen
Strictinin, the major phenolic compound in Pu'er teas produced from young leaves and buds of wild trees, was isolated to evaluate its antibacterial and laxative activities. The minimum inhibitory concentrations of strictinin against Propionibacterium acnes and Staphylococcus epidermidis were determined as 250 μM and 2000 μM, respectively, apparently higher than those of several antibiotics commonly used for bacterial infections. The additive and synergistic effects on the inhibitory activities of strictinin combined with other commercial antibiotics were observed in two bacteria tested in this study via the analysis of fractional inhibitory concentrations...
October 2016: Journal of Food and Drug Analysis
https://www.readbyqxmd.com/read/28899506/green-tea-effects-on-cognition-mood-and-human-brain-function-a-systematic-review
#8
REVIEW
Edele Mancini, Christoph Beglinger, Jürgen Drewe, Davide Zanchi, Undine E Lang, Stefan Borgwardt
BACKGROUND: Green tea (Camellia sinensis) is a beverage consumed for thousands of years. Numerous claims about the benefits of its consumption were stated and investigated. As green tea is experiencing a surge in popularity in Western culture and as millions of people all over the world drink it every day, it is relevant to understand its effects on the human brain. PURPOSE: To assess the current state of knowledge in the literature regarding the effects of green tea or green tea extracts, l-theanine and epigallocatechin gallate both components of green tea-on general neuropsychology, on the sub-category cognition and on brain functions in humans...
October 15, 2017: Phytomedicine: International Journal of Phytotherapy and Phytopharmacology
https://www.readbyqxmd.com/read/28887677/evolutionary-and-functional-characterization-of-leucoanthocyanidin-reductases-from-camellia-sinensis
#9
Peiqiang Wang, Lingjie Zhang, Xiaolan Jiang, Xinlong Dai, Lijuan Xu, Tong Li, Dawei Xing, Yanzhi Li, Mingzhuo Li, Liping Gao, Tao Xia
LARs promoted the biosynthesis of catechin monomers and inhibited their polymerization. The accumulation of catechin monomers and polymers was increased by up-regulating the expression of NtLAR and NtANR s in CsMYB5b transgenic tobacco. Tea is rich in polyphenolic compounds, and catechins are the major polyphenols in tea. The biosynthesis of polyphenols is closely related to the expression of the leucoanthocyanidin reductase (LAR) and anthocyanidin reductase (ANR) genes. In this paper, an evolutionary analysis and functional characterization of three CsLARs were performed...
September 8, 2017: Planta
https://www.readbyqxmd.com/read/28879218/identification-of-epigallocatechin-3-o-3-o-methyl-gallate-egcg3-me-and-amino-acid-profiles-in-various-tea-camellia-sinensis-l-cultivars
#10
Hyang-Gi Ji, Yeong-Ran Lee, Min-Seuk Lee, Kyeng Hwan Hwang, Eun-Hee Kim, Jun Seong Park, Young-Shick Hong
This article includes experimental data on the identification of epigallocatechin-3-O-(3-O-methyl)-gallate (EGCG3''Me) by 2-dimensional (2D) proton ((1)H) NMR analysis and on the information of amino acid and catechin compound profiles by HPLC analysis in leaf extracts of various tea cultivars. These data are related to the research article "Metabolic phenotyping of various tea (Camellia sinensis L.) cultivars and understanding of their intrinsic metabolism" (Ji et al., 2017) [1]. The assignment for EGCG3x''Me by (1)H NMR analysis was also confirmed with spiking experiment of its pure chemical...
October 2017: Data in Brief
https://www.readbyqxmd.com/read/28873707/green-tea-supplementation-produces-better-neuroprotective-effects-than-red-and-black-tea-in-alzheimer-like-rat-model
#11
Helen L Schimidt, Alexandre Garcia, Alexandre Martins, Pamela B Mello-Carpes, Felipe P Carpes
Green tea from Camellia sinensis plays a neuroprotective role in different neurodegenerative conditions, such as memory deficits in Alzheimer disease (AD). However, whether other teas from Camellia sinensis present similar neuroprotective effect still is not clear. Here we investigate effects of green, red and black tea supplementation on memory and hippocampus oxidative status in a rat model of Alzheimer-like disease (AD-like). METHOD: Wistar male rats were supplemented with green, red or black tea during 8weeks before Aβ intra-hippocampal injection (2μL of Aβ-25-35, CA1 region)...
October 2017: Food Research International
https://www.readbyqxmd.com/read/28870011/inhibitory-effect-of-an-ethanol-extract-of-a-rice-bran-mixture-including-angelica-gigas-cnidium-officinale-artemisia-princeps-and-camellia-sinensis-on-brucella-abortus-uptake-by-professional-and-non-professional-phagocytes
#12
Huynh Tan Hop, Lauren Togonon Arayan, Alisha Wehdnesday Bernardo Reyes, Tran Xuan Ngoc Huy, Eun Jin Baek, WonGi Min, Hu Jang Lee, Chun Hee Lee, Man Hee Rhee, Suk Kim
In this study, we evaluated the inhibitory effect of a rice bran mixture extract (RBE) on Brucella (B.) abortus pathogenesis in professional (RAW 264.7) and non-professional (HeLa) phagocytes. We fermented the rice bran mixture and then extracted with 50% ethanol followed by gas chromatography-mass spectrometry to identify components in RBE. Our results clearly showed that RBE caused a significant reduction in the adherence of B. abortus in both cell lines. Furthermore, analysis of phagocytic signaling proteins by Western blot revealed that RBE pretreatment resulted in inhibition of phosphorylation of JNK, ERK and p38, leading to decline of internalization compared with the controls...
September 5, 2017: Journal of Microbiology and Biotechnology
https://www.readbyqxmd.com/read/28865383/fluoride-concentrations-in-traditional-and-herbal-teas-health-risk-assessment
#13
Suchismita Das, Letuzia M de Oliveira, Evandro da Silva, Yungen Liu, Lena Q Ma
Traditional tea (Camellia sinensis) and herbal tea are being consumed across the world. However, long term consumption of tea can increase the chances of fluorosis owing to the presence of fluoride (F) in teas. Therefore, it is imperative to assess the health risk associated with tea consumption. The main objectives of this study were to: 1) estimate total F in 47 popular teas, including traditional and herbal teas and F concentrations in 1% (w/v) infusion of 5 min, and 2) assess the exposure risks of F from tea consumption in children and adults...
August 30, 2017: Environmental Pollution
https://www.readbyqxmd.com/read/28864169/molecular-understanding-of-epigallocatechin-gallate-egcg-in-cardiovascular-and-metabolic-diseases
#14
REVIEW
Qian Yi Eng, Punniyakoti Veeraveedu Thanikachalam, Srinivasan Ramamurthy
ETHNOPHARMACOLOGICAL RELEVANCE: The compound epigallocatechin-3-gallate (EGCG), the major polyphenolic compound present in green tea [Camellia sinensis (Theaceae], has shown numerous cardiovascular health promoting activity through modulating various pathways. However, molecular understanding of the cardiovascular protective role of EGCG has not been reported. AIM OF THE REVIEW: This review aims to compile the preclinical and clinical studies that had been done on EGCG to investigate its protective effect on cardiovascular and metabolic diseases in order to provide a systematic guidance for future research...
August 31, 2017: Journal of Ethnopharmacology
https://www.readbyqxmd.com/read/28852881/itraq-based-proteomics-monitors-the-withering-dynamics-in-postharvest-leaves-of-tea-plant-camellia-sinensis
#15
Zhi-Jun Wu, Hong-Yu Ma, Jing Zhuang
Tea plant [Camellia sinensis (L.) O. Kuntze] is a typical leaf-type beverage crop. Many secondary metabolites, such as tea polyphenols, theanine, and caffeine that accumulated in tea leaves are beneficial to human health. The fresh leaves of tea plant are harvested and timely processed into tea products with different flavors. The withering of fresh tea leaves is the first step in tea processing and directly affects tea color, taste, and fragrance. To understand the molecular mechanism that influences tea quality during withering, we investigated the dynamic changes in the proteome of postharvest tea leaves in four withering stages (0, 1, 4, and 12 h treatments)...
August 29, 2017: Molecular Genetics and Genomics: MGG
https://www.readbyqxmd.com/read/28851890/effect-of-fluoride-treatment-on-gene-expression-in-tea-plant-camellia-sinensis
#16
Qing-Sheng Li, Xiao-Ming Lin, Ru-Ying Qiao, Xin-Qiang Zheng, Jian-Liang Lu, Jian-Hui Ye, Yue-Rong Liang
Tea plant is a typical fluorine (F) accumulator. F concentration in mature tea leaves is several hundred times higher than that in normal field crops. Long-term consumption of teas with high level F will increase the risks of dental and skeletal fluorosis. The mechanism of F accumulation in tea stands unclear. RNA-Seq and digital gene expression (DGE) techniques were used to investigate the effect of F on the differential expressions of transcriptome in tea plant. The results showed that F content in mature tea leaves was increased with increase in F concentration of cultural solution and duration of F treatment time...
August 29, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28845765/role-of-green-tea-flavonoids-and-other-related-contents-in-cancer-prevention
#17
REVIEW
Muhammad Imran Qadir
Green tea is made from Camellia sinensis and leaves through the oxidation process. It mainly originates in China and has been used traditionally throughout Asia. In the West, black tea has been used mostly, but green tea has become the most popular beverage throughout the world. It is also used as a raw material in cosmetics, health foods, and as an added ingredient in various beverages. Different varieties of green tea are available. The main differences between the varieties are due to harvesting time, production procedures, and horticulture...
2017: Critical Reviews in Eukaryotic Gene Expression
https://www.readbyqxmd.com/read/28844668/transcriptomic-analysis-of-flower-development-in-tea-camellia-sinensis-l
#18
Feng Liu, Yu Wang, Zhaotang Ding, Lei Zhao, Jun Xiao, Linjun Wang, Shibo Ding
Flowering is a critical and complicated process in plant development, involving interactions of numerous endogenous and environmental factors, but little is known about the complex network regulating flower development in tea plants. In this study, de novo transcriptome assembly and gene expression analysis using Illumina sequencing technology were performed. Transcriptomic analysis assembles gene-related information involved in reproductive growth of C. sinensis. Gene Ontology (GO) analysis of the annotated unigenes revealed that the majority of sequenced genes were associated with metabolic and cellular processes, cell and cell parts, catalytic activity and binding...
October 5, 2017: Gene
https://www.readbyqxmd.com/read/28825557/analysis-of-theanine-in-tea-camellia-sinensis-dietary-ingredients-and-supplements-by-high-performance-liquid-chromatography-with-postcolumn-derivatization-single-laboratory-validation-first-action-2016-10
#19
Mariaova Ofitser, Sareeta Nerkar, Brian T Schaneberg, Nour Eddine Es-Safi, Tetsuhisa Goto, Martha Jennens, Holly E Johnson, Philip J Koerner, Pam A Marone, Melissa Meaney Phillips, Tom Phillips, Klaus Reif, Aniko M Solyom, Darryl M Sullivan, Marina Torres, Jinchuan Yang, Kurt Young, Yanjun Zhang
No abstract text is available yet for this article.
January 1, 2017: Journal of AOAC International
https://www.readbyqxmd.com/read/28801632/stimulation-in-primary-and-secondary-metabolism-by-elevated-carbon-dioxide-alters-green-tea-quality-in-camellia-sinensis-l
#20
Xin Li, Lan Zhang, Golam Jalal Ahammed, Zhi-Xin Li, Ji-Peng Wei, Chen Shen, Peng Yan, Li-Ping Zhang, Wen-Yan Han
Rising CO2 concentration, a driving force of climate change, is impacting global food security by affecting plant physiology. Nevertheless, the effects of elevated CO2 on primary and secondary metabolism in tea plants (Camellia sinensis L.) still remain largely unknown. Here we showed that exposure of tea plants to elevated CO2 (800 µmol mol(-1) for 24 d) remarkably improved both photosynthesis and respiration in tea leaves. Furthermore, elevated CO2 increased the concentrations of soluble sugar, starch and total carbon, but decreased the total nitrogen concentration, resulting in an increased carbon to nitrogen ratio in tea leaves...
August 11, 2017: Scientific Reports
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