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Camellia sinensis

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https://www.readbyqxmd.com/read/28725904/cellular-antioxidant-methylglyoxal-trapping-and-anti-inflammatory-activities-of-cocoa-tea-camellia-ptilophylla-chang
#1
Xiong Gao, Xiaorong Lin, Xiaofei Li, Yuanyuan Zhang, Zhongzheng Chen, Bin Li
Cocoa tea (Camellia ptilophylla Chang) is a naturally low caffeine-containing but gallocatechin gallate (GCG)-rich tea cultivar, though its biological activities have not been extensively explored. Herein, we evaluated the in vitro cellular antioxidant, methylglyoxal trapping, and anti-inflammatory activities of water extract of green tea from cocoa tea (CWE) and Yunnan Daye tea (Camellia sinensis) (YWE), and their predominant bioactive components GCG and epigallocatechin gallate (EGCG) for comparative purposes...
July 20, 2017: Food & Function
https://www.readbyqxmd.com/read/28725058/identification-of-a-flavonoid-glucosyltransferase-involved-in-7-oh-site-glycosylation-in-tea-plants-camellia-sinensis
#2
Xinlong Dai, Juhua Zhuang, Yingling Wu, Peiqiang Wang, Guifu Zhao, Yajun Liu, Xiaolan Jiang, Liping Gao, Tao Xia
Flavonol glycosides, which are often converted from aglycones in a process catalyzed by UDP-glycosyltransferases (UGTs), play an important role for the health of plants and animals. In the present study, a gene encoding a flavonoid 7-O-glycosyltransferase (CsUGT75L12) was identified in tea plants. Recombinant CsUGT75L12 protein displayed glycosyltransferase activity on the 7-OH position of multiple phenolic compounds. In relative comparison to wild-type seeds, the levels of flavonol-glucosides increased in Arabidopsis seeds overexpressing CsUGT75L12...
July 19, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28711790/six-phenylalanine-ammonia-lyases-from-camellia-sinensis-evolution-expression-and-kinetics
#3
Yingling Wu, Wenzhao Wang, Yanzhi Li, Xinlong Dai, Guoliang Ma, Dawei Xing, Mengqing Zhu, Liping Gao, Tao Xia
Phenylalanine ammonia-lyase (PAL), the branch point enzyme controlling the flow of primary metabolism into second metabolism, converts the L-phenylalanine (L-Phe) to yield cinnamic acid. Based on the sequencing data available from eight transcriptome projects, six PAL genes have been screened out, cloned, and designated as CsPALa-CsPALf. The phylogenetic tree showed that CsPALs were divided into three subgroups, PALa and PALb, PALc and PALd, and PALe and PALf. All six CsPALs exhibited indiscriminate cytosolic locations in epidermis cells and mesophyll cells...
June 29, 2017: Plant Physiology and Biochemistry: PPB
https://www.readbyqxmd.com/read/28683768/extrapolative-microrna-precursor-based-ssr-mining-from-tea-est-database-in-respect-to-agronomic-traits
#4
Anjan Hazra, Nirjhar Dasgupta, Chandan Sengupta, Sauren Das
Tea (Camellia sinensis, (L.) Kuntze) is considered as most popular drink across the world and it is widely consumed beverage for its several health-benefit characteristics. These positive traits primarily rely on its regulatory networks of different metabolic pathways. Development of microsatellite markers from the conserved genomic regions are being worthwhile for reviewing the genetic diversity of closely related species or self-pollinated species. Although several SSR markers have been reported, in tea, the trait-specific Simple Sequence Repeat (SSR) markers, leading to be useful in marker assisted breeding technique, are yet to be identified...
July 6, 2017: BMC Research Notes
https://www.readbyqxmd.com/read/28678527/oolong-tea-a-critical-review-of-processing-methods-chemical-composition-health-effects-and-risk
#5
Kwan-Wai Ng, Zi-Jun Cao, Hu-Biao Chen, Zhong-Zhen Zhao, Lin Zhu, Tao Yi
Oolong tea (OT) is a traditional Chinese tea (Camellia sinensis) and is especially popular in south China. This review is to comprehensively summarize the miscellaneous research that has been done towards to the processing, phytochemistry, health benefit, and risk of OT. These literatures were carried out not only from different electronic databases but also from text books written in English, Japanese and Chinese, including those traditional records tracing back to the Tang Dynasty (A.D. 618-907). The full process OT producing is depicted below in this review...
July 5, 2017: Critical Reviews in Food Science and Nutrition
https://www.readbyqxmd.com/read/28664364/pyramiding-of-tea-dihydroflavonol-reductase-and-anthocyanidin-reductase-increases-flavan-3-ols-and-improves-protective-ability-under-stress-conditions-in-tobacco
#6
Vinay Kumar, Sudesh Kumar Yadav
Tea (Camellia sinensis) is one of the richest sources of flavan-3-ols, an important class of flavonoids. The expression level of gene-encoded key regulatory enzymes of flavan-3-ol/anthocyanin biosynthetic pathway, dihydroflavonol 4-reductase (DFR) and anthocyanidin reductase (ANR), has been highly correlated with the flavan-3-ol contents and antioxidant activity in tea plant. In the present study, pyramiding of CsDFR and CsANR in tobacco was achieved. However, single transgenic tobacco overexpressing either CsDFR or CsANR was documented earlier...
July 2017: 3 Biotech
https://www.readbyqxmd.com/read/28659938/functional-characterization-of-tea-camellia-sinensis-myb4a-transcription-factor-using-an-integrative-approach
#7
Mingzhuo Li, Yanzhi Li, Lili Guo, Niandi Gong, Yongzheng Pang, Wenbo Jiang, Yajun Liu, Xiaolan Jiang, Lei Zhao, Yunsheng Wang, De-Yu Xie, Liping Gao, Tao Xia
Green tea (Camellia sinensis, Cs) abundantly produces a diverse array of phenylpropanoid compounds benefiting human health. To date, the regulation of the phenylpropanoid biosynthesis in tea remains to be investigated. Here, we report a cDNA isolated from leaf tissues, which encodes a R2R3-MYB transcription factor. Amino acid sequence alignment and phylogenetic analysis indicate that it is a member of the MYB4-subgroup and named as CsMYB4a. Transcriptional and metabolic analyses show that the expression profile of CsMYB4a is negatively correlated to the accumulation of six flavan-3-ols and other phenolic acids...
2017: Frontiers in Plant Science
https://www.readbyqxmd.com/read/28649074/neurochemical-and-behavioral-effects-of-green-tea-camellia-sinensis-as-observed-in-animals-exposed-to-restraint-stress
#8
Huma Ikram, Beenish Mirza, Darakhshan Jabeen Haleem
Clinical studies on psychiatric patients suggest that life events stress precipitates depression. The possible involvement of 5-Hydroxy tryptamine (5-HT; Serotonin) in depression and other behavioral deficits is also suggested by clinical studies. As a natural stimulant, green tea (Camellia Sinensis) diminishes stress, worry and anxiety, allowing the brain to focus and concentrate better. Previously we have reported that beneficial effects of green tea might be associated with altered levels of 5-HT, which in turn may help in coping with stress...
March 2017: Pakistan Journal of Pharmaceutical Sciences
https://www.readbyqxmd.com/read/28641467/green-tea-polyphenol-egcg-causes-anti-cancerous-epigenetic-modulations-in-acute-promyelocytic-leukemia-cells
#9
Veronika Borutinskaitė, Aida Virkšaitė, Giedrė Gudelytė, Rūta Navakauskienė
Green tea (Camellia sinensis) catechin epigallocatechin-3-gallate (EGCG) has been shown to possess diverse anti-cancerous properties. We demonstrated EGCG ability to inhibit acute promyelocytic leukemia (APL) cell proliferation and cause apoptosis. In addition, quantitative real-time polymerase chain reaction (RT-qPCR) analysis revealed elevated expression of genes associated with cell cycle arrest and differentiation (p27, PCAF, C/EBPα, and C/EBPɛ). Furthermore, EGCG caused anti-cancerous epigenetic changes: downregulation of epigenetic modifiers DNMT1, HDAC1, HDAC2, and G9a was observed by RT-qPCR analysis...
June 22, 2017: Leukemia & Lymphoma
https://www.readbyqxmd.com/read/28639055/effects-of-kaolin-m-99-099-application-on-antioxidant-and-phenolic-compounds-in-tea-leaves-camellia-sinensis-l-o-kuntze
#10
Keziban Yazici, Burcu Goksu
In this study, the effects of kaolin (M-99-099) applications on the total phenolic and antioxidant contents of tea leaves (Camellia sinensis (L.) O. Kuntze) harvested in three different periods were investigated. For this purpose, four different strategies including standard fertilizer application (T), 3% kaolin+standard fertilizer application (Ka1), 6% kaolin+standard fertilizer application (Ka2), and control (C) (nothing applied) were used to compare the effects of these strategies on total phenolic content, FRAP values, and DPPH radical scavenging capacities of tea leaves...
June 21, 2017: Biochemical Genetics
https://www.readbyqxmd.com/read/28638865/some-engineering-properties-of-shelled-and-kernel-tea-camellia-sinensis-seeds
#11
Ebubekir Altuntas, Merve Yildiz
BACKGROUND: Camellia sinensis is the source of tea leaves and it is an economic crop now grown around the World. Tea seed oil has been used for cooking in China and other Asian countries for more than a thousand years. Tea is the most widely consumed beverages after water in the world. It is mainly produced in Asia, central Africa, and exported throughout the World. Some engineering properties (size dimensions, sphericity, volume, bulk and true densities, friction coefficient, colour characteristics and mechanical behaviour as rupture force of shelled and kernel tea (Camellia sinensis) seeds were determined in this study...
2017: African Journal of Traditional, Complementary, and Alternative Medicines: AJTCAM
https://www.readbyqxmd.com/read/28625892/consumers-acceptance-of-medicinal-herbs-an-application-of-the-technology-acceptance-model-tam
#12
Nargesh Khatun Jokar, Seyyed Ali Noorhosseini, Mohammad Sadegh Allahyari, Christos A Damalas
ETHNOPHARMACOLOGICAL RELEVANCE: The shift in consumers' preferences from synthetic to 'natural' products has led to a resurgence of interest in medicinal plants, particularly in developing countries. However, research data about consumers' preferences for particular products is hard to find. AIMS AND OBJECTIVES: The main objective of this study was to contribute to the general understanding of consumers' intention for selecting medicinal herbs for consumption. MATERIALS AND METHODS: Factors underpinning consumers' acceptance of medicinal herbs were studied with the technology acceptance model (TAM) in Rasht City of Iran using a structured questionnaire...
June 15, 2017: Journal of Ethnopharmacology
https://www.readbyqxmd.com/read/28620637/evaluation-of-the-effects-of-three-plant-species-myrtus-communis-l-camellia-sinensis-l-zataria-multiflora-boiss-on-the-healing-process-of-intraoral-ulcers-in-rats
#13
Maryam Alsadat Hashemipour, Sodabeh Lotfi, Molok Torabi, Fariba Sharifi, Mehdi Ansari, Amirreza Ghassemi, Saied Sheikhshoaie
STATEMENT OF THE PROBLEM: Use of traditional medicine to relieve human sufferings has a very long history. The effects of these plants in wound curing and subsequently making the best mucosa patch for treatment of oral ulcers is still under investigation. PURPOSE: The main goal of present research work is to assess the efficacy of Myrtus communis L., Camellia sinensis L. and Zataria multiflora Boiss. on oral ulcer recovery process in rats. MATERIALS AND METHOD: In this study, 60 healthy adult male rats in 5 groups were investigated...
June 2017: Journal of Dentistry
https://www.readbyqxmd.com/read/28609448/%C3%AE-copaene-is-an-attractant-synergistic-with-quercivorol-for-improved-detection-of-euwallacea-nr-fornicatus-coleoptera-curculionidae-scolytinae
#14
Paul E Kendra, David Owens, Wayne S Montgomery, Teresa I Narvaez, Gary R Bauchan, Elena Q Schnell, Nurhayat Tabanca, Daniel Carrillo
The tea shot-hole borer, Euwallacea fornicatus Eichhoff, is an ambrosia beetle endemic to Asia and a pest of commercial tea, Camellia sinensis (L.) Kuntze. Recently, a complex of species morphologically similar to E. fornicatus has been recognized, which includes new pests established in Israel and the USA, both in California and Florida. Collectively termed E. nr. fornicatus, these cryptic species carry symbiotic Fusarium spp. fungi, some of which cause dieback disease in susceptible hosts, which include avocado, Persea americana Miller...
2017: PloS One
https://www.readbyqxmd.com/read/28605974/hplc-method-for-measurement-of-human-salivary-%C3%AE-amylase-inhibition-by-aqueous-plant-extracts
#15
István Takács, Ákos Takács, Anikó Pósa, Gyöngyi Gyémánt
Control of hyperglycemia is an important treatment in metabolic disorders such as type II diabetes and obesity. α-Amylase, as the first enzyme of glucose release from dietary polysaccharides, is a potential target to identify new sources of novel anti-obesity and anti-diabetic drugs. In this work, different herbal extracts as α-amylase inhibitors were studied by measuring the rate of the cleavage of a maltooligomer substrate 2-chloro-4-nitrophenyl-β-D-maltoheptoside. Measurement of chromophore containing products after reversed phase HPLC separation was used for α-amylase activity measurement...
June 2017: Acta Biologica Hungarica
https://www.readbyqxmd.com/read/28603626/physiologically-based-pharmacokinetic-modeling-of-tea-catechin-mixture-in-rats-and-humans
#16
Francis C P Law, Meicun Yao, Hui-Chang Bi, Stephen Lam
Although green tea (Camellia sinensis) (GT) contains a large number of polyphenolic compounds with anti-oxidative and anti-proliferative activities, little is known of the pharmacokinetics and tissue dose of tea catechins (TCs) as a chemical mixture in humans. The objectives of this study were to develop and validate a physiologically based pharmacokinetic (PBPK) model of tea catechin mixture (TCM) in rats and humans, and to predict an integrated or total concentration of TCM in the plasma of humans after consuming GT or Polyphenon E (PE)...
June 2017: Pharmacology Research & Perspectives
https://www.readbyqxmd.com/read/28599249/important-medicinal-herbs-in-parkinson-s-disease-pharmacotherapy
#17
REVIEW
Saurabh Srivastav, Mahino Fatima, Amal Chandra Mondal
Parkinson's disease (PD) is the most common progressive neurodegenerative movement disorder affecting more than 10 million people worldwide. The characteristic hallmark of PD involves progressive loss of dopaminergic (DA-ergic) neuron in Substantia Nigra pars compacta (SNpc) region of the brain, however, aetiology of the disease still remains unclear. Mitochondrial dysfunction and oxidative insult are considered to be the key culprit. The current therapy available for PD primarily relies on Levodopa that offers the potential of slowing down disease progression to some extent but includes lot of side effects...
August 2017: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/28597442/effects-of-adjacent-land-use-types-on-the-distribution-of-soil-organic-carbon-stocks-in-the-montane-area-of-central-taiwan
#18
Chiou-Pin Chen, Kai-Wei Juang, Chih-Hsin Cheng, Chuang-Wen Pai
BACKGROUND: Soil organic carbon (SOC) stocks can be altered through reforestation and cropping. We estimated the effects of land use on SOC stocks after natural deciduous forests replaced by crops and coniferous plantations by examining the vertical distribution of SOC stocks at different depth intervals in an adjacent Oolong tea (Camellia sinensis L.) plantation, Moso bamboo (Phyllostachys pubescens) forest, Japanese cedar (Cryptomeria japonica) forest, and Taiwania (Taiwania cryptomerioides) forest in central Taiwan...
December 2016: Botanical Studies (Taipei, Taiwan)
https://www.readbyqxmd.com/read/28597441/accumulation-of-catechins-and-expression-of-catechin-synthetic-genes-in-camellia-sinensis-at-different-developmental-stages
#19
Li-Qun Zhang, Kang Wei, Hao Cheng, Li-Yuan Wang, Cheng-Cai Zhang
BACKGROUND: Catechins are the main polyphenol compounds in tea (Camellia sinensis). To understand the relationship between gene expression and product accumulation, the levels of catechins and relative expressions of key genes in tea leaves of different developmental stages were analyzed. RESULTS: The amounts of catechins differed significantly in leaves of different stages, except for gallocatechin gallate. Close correlations between the expression of synthesis genes and the accumulation of catechins were identified...
December 2016: Botanical Studies (Taipei, Taiwan)
https://www.readbyqxmd.com/read/28596773/molecular-link-between-leaf-coloration-and-gene-expression-of-flavonoid-and-carotenoid-biosynthesis-in-camellia-sinensis-cultivar-huangjinya
#20
Lubin Song, Qingping Ma, Zhongwei Zou, Kang Sun, Yuantao Yao, Jihan Tao, Najeeb A Kaleri, Xinghui Li
'Huangjinya' is an excellent albino tea germplasm cultivated in China because of its bright color and high amino acid content. It is light sensitive, with yellow leaves under intense light while green leaves under weak light. As well, the flavonoid and carotenoid levels increased after moderate shading treatment. However, the mechanism underlying this interesting phenomenon remains unclear. In this study, the transcriptome of 'Huangjinya' plants exposed to sunlight and shade were analyzed by high-throughput sequencing followed by de novo assembly...
2017: Frontiers in Plant Science
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