Publications
| Title | Abstract | Year Filter | PMID(sorted ascending) Filter |
|---|
| transcriptome-based analysis of dof family transcription factors and their responses to abiotic stress in tea plant (camellia sinensis). | tea plant (camellia sinensis (l.) o. kuntze) is affected by abiotic stress during its growth and development. dna-binding with one finger (dof) transcription factors (tfs) play important roles in abiotic stress tolerance of plants. in this study, a total of 29 putative dof tfs were identified based on transcriptome of tea plant, and the conserved domains and common motifs of these csdof tfs were predicted and analyzed. the 29 csdof proteins were divided into 7 groups (a, b1, b2, c1, c2.1, c2.2, ... | 2016 | 27872842 |
| dye degradation by green heterogeneous fenton catalysts prepared in presence of camellia sinensis. | this work describes the synthesis and characterization of supported green iron catalysts, prepared with camellia sinensis tea extract, and their application in heterogeneous fenton degradation of pollutant dyes. the influence of the catalyst synthesis conditions in the iron and organic content were investigated by x-ray fluorescence and thermogravimetric analyses. irregular, chain-like nanoparticles, in the size range of 20-100 nm, capped by polyphenolic natural compounds, were visualized by tem ... | 2017 | 27883942 |
| in vitro chemopreventive properties of green tea, rooibos and honeybush extracts in skin cells. | the chemopreventive properties of the herbal teas rooibos (aspalathus linearis) and honeybush (cyclopia spp.) have been demonstrated on mouse skin in vivo but the underlying mechanisms are not clear. the aim of the current study was to determine the anti-proliferative and pro-apoptotic activity of methanol and aqueous extracts of rooibos and two cyclopia species in different skin cells, using green tea (camellia sinensis) as a benchmark. extracts were also characterised for their major individua ... | 2016 | 27897996 |
| the antiproliferative effect of chakasaponins i and ii, floratheasaponin a, and epigallocatechin 3-o-gallate isolated from camellia sinensis on human digestive tract carcinoma cell lines. | acylated oleanane-type triterpene saponins, namely chakasaponins i (1) and ii (2), floratheasaponin a (3), and their analogs, together with catechins-including (-)-epigallocatechin 3-o-gallate (4), flavonoids, and caffeine-have been isolated as characteristic functional constituents from the extracts of "tea flower", the flower buds of camellia sinensis (theaceae), which have common components with that of the leaf part. these isolates exhibited antiproliferative activities against human digesti ... | 2016 | 27898032 |
| antioxidant and antibacterial activity of the beverage obtained by fermentation of sweetened lemon balm (melissa officinalis l.) tea with symbiotic consortium of bacteria and yeasts. | kombucha is a fermented tea beverage which is traditionally prepared by fermenting sweetened black or green tea (camellia sinensis l.) with symbiotic consortium of bacteria and yeasts (scoby). in this study, lemon balm (melissa officinalis l.) was used as the only nitrogen source for kombucha fermentation. during the seven-day fermentation process, ph value, titratable acidity (ta), total phenolic content, phenolic compounds, and antioxidant activity against hydroxyl (˙oh) and 1,1-diphenyl-2-pic ... | 2014 | 27904315 |
| noni leaf and black tea enhance bone regeneration in estrogen-deficient rats. | black tea and nonileaf are among the dietary compounds that can benefit patients with bone resorption disorders. their bone regeneration effects and their mechanisms were studied in estrogen-deficient rats. | 2017 | 27908549 |
| inhibitory effects of l-theanine on airway inflammation in ovalbumin-induced allergic asthma. | l-theanine, a water-soluble amino acid isolated from green tea (camellia sinensis), has anti-inflammatory activity, antioxidative properties, and hepatoprotective effects. however, the anti-allergic effect of l-theanine and its underlying molecular mechanisms have not been elucidated. in this study, we investigated the protective effects of l-theanine on asthmatic responses, particularly airway inflammation and oxidative stress modulation in an ovalbumin (ova)-induced murine model of asthma. tre ... | 2017 | 27908701 |
| protective effects of green tea and its main constituents against natural and chemical toxins: a comprehensive review. | toxins are natural or chemical poisonous substances with severe side effects on health. humans are generally exposed by widespread toxic contaminations via air, soil, water, food, fruits and vegetables. determining a critical antidote agent with extensive effects on different toxins is an ultimate goal for all toxicologists. traditional medicine is currently perceived as a safe and natural approach against toxins. in this regard, we focused on the protective effects of green tea (camellia sinens ... | 2017 | 27915048 |
| characteristics of nh4(+) and no3(-) fluxes in tea (camellia sinensis) roots measured by scanning ion-selective electrode technique. | as a vital beverage crop, tea has been extensively planted in tropical and subtropical regions. nitrogen (n) levels and forms are closely related to tea quality. based on different n levels and forms, we studied changes in no3(-) and nh4(+) fluxes in tea roots utilizing scanning ion-selective electrode technique. our results showed that under both single and mixed n forms, influx rates of no3(-) were much lower than those of nh4(+), suggesting a preference for nh4(+) in tea. with the increase in ... | 2016 | 27918495 |
| functional properties of novel epigallocatechin gallate glucosides synthesized by using dextransucrase from leuconostoc mesenteroides b-1299cb4. | epigallocatechin gallate (egcg) is the most abundant catechin found in the leaves of green tea, camellia sinensis. in this study, novel epigallocatechin gallate-glucocides (egcg-gs) were synthesized by using dextransucrase from leuconostoc mesenteroides b-1299cb4. response surface methodology was adopted to optimize the conversion of egcg to egcg-gs, resulting in a 91.43% conversion rate of egcg. each egcg-g was purified using a c18 column. of nine egcg-gs identified by nuclear magnetic resonanc ... | 2016 | 27933996 |
| mechanisms of body weight reduction by black tea polyphenols. | obesity is one of the most common nutritional diseases worldwide. this disease causes health problems, such as dyslipidemia, hyperglycemia, hypertension and inflammation. there are drugs used to inhibit obesity. however, they have serious side effects outweighing their beneficial effects. black tea, commonly referred to as "fermented tea", has shown a positive effect on reducing body weight in animal models. black tea polyphenols are the major components in black tea which reduce body weight. bl ... | 2016 | 27941615 |
| natural product htp screening for attenuation of cytokine-induced neutrophil chemo attractants (cincs) and no2- in lps/ifnγ activated glioma cells. | chronic and acute central nervous system (cns) inflammation are contributors toward neurological injury associated with head trauma, stroke, infection, parkinsons or alzheimers disease. cns inflammatory illnesses can also contribute toward risk of developing glioblastoma multiforme (gbm). with growing public interest in complementary and alternative medicines (cams), we conduct a high throughput (htp) screening of >1400 natural herbs, plants and over the counter (otc) products for anti-inflammat ... | 2017 | 27956075 |
| amelioration of gamma-hexachlorocyclohexane (lindane) induced renal toxicity by camellia sinensis in wistar rats. | a study to assess the toxic effects of gamma-hexachlorocyclohexane (γ-hch) (lindane) and ameliorative effects of camellia sinensis on renal system has been carried out in male wistar rats. | 2016 | 27956790 |
| 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. | 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 ° ... | 2016 | 27983946 |
| effect of diabetea tea ™ consumption on inflammatory cytokines and metabolic biomarkers in type 2 diabetes patients. | diabetea tea™ (dt) is an anti-diabetic alternative medicine in some asian countries. the main constituent of dt is black tea originating from camellia sinensis that is supplemented by 12 other medicinal plants. black tea contains a large amount of the flavonoids catechins especially epigallocatechin gallate (egcg) which has anti-inflammatory and antioxidative capacity. this study was undertaken to evaluate the possible effects of dt intake on inflammatory cytokines, regulatory t cells (tregs) an ... | 2016 | 27989874 |
| zinc stress affects ionome and metabolome in tea plants. | the research of physiological responses to zn stress in plants has been extensively studied. however, the ionomics and metabolomics responses of plants to zn stress remain largely unknown. in present study, the nutrient elements were identified involved in ion homeostasis and metabolomics changes related to zn deficiency or excess in tea plants. nutrient element analysis demonstrated that the concentrations of zn affected the ion-uptake in roots and the nutrient element transportation to leaves, ... | 2017 | 27992770 |
| anti-proliferative and apoptosis-inducing effect of theabrownin against non-small cell lung adenocarcinoma a549 cells. | with the highest cancer incidence rate, lung cancer, especially non-small cell lung cancer (nsclc), is the leading cause of cancer death in the world. tea (leaves of camellia sinensis) has been widely used as a traditional beverage beneficial to human health, including anti-nsclc activity. theabrownin (tb) is one major kind of tea pigment responsible for the beneficial effects of tea liquor. however, its effect on nsclc is unknown. the aim of the present study was to evaluate anti-proliferative ... | 2016 | 27994550 |
| isolation and expression features of hexose kinase genes under various abiotic stresses in the tea plant (camellia sinensis). | hexokinases (hxks, ec 2.7.1.1) and fructokinases (frks, ec 2.7.1.4) play important roles in carbohydrate metabolism and sugar signaling during the growth and development of plants. however, the hxks and frks in the tea plant (camellia sinensis) remain largely unknown. in this manuscript, we present the molecular characterization, phylogenetic relationships, conserved domains and expression profiles of four hxk and seven frk genes of the tea plant. the 11 deduced cshxk and csfrk proteins were gro ... | 2017 | 28013175 |
| global transcriptional analysis reveals the complex relationship between tea quality, leaf senescence and the responses to cold-drought combined stress in camellia sinensis. | in field conditions, especially in arid and semi-arid areas, tea plants are often simultaneously exposed to various abiotic stresses such as cold and drought, which have profound effects on leaf senescence process and tea quality. however, most studies of gene expression in stress responses focus on a single inciting agent, and the confounding effect of multiple stresses on crop quality and leaf senescence remain unearthed. here, global transcriptome profiles of tea leaves under separately cold ... | 2016 | 28018394 |
| htp nutraceutical screening for histone deacetylase inhibitors and effects of hdacis on tumor-suppressing mirnas by trichostatin a and grapeseed (vitis vinifera) in hela cells. | aggressive tumor malignancies are a consequence of delayed diagnosis, epigenetic/phenotype changes and chemo-radiation resistance. histone deacetylases (hdacs) are a major epigenetic regulator of transcriptional repression, which are highly overexpressed in advanced malignancy. while original chemotherapy drugs were modeled after phytochemicals elucidated by botanical screenings, hdac inhibitors (hdaci) such as apicidin, trichostatin a (tsa) and butyrate were discovered as products of fungus and ... | 2017 | 28031235 |
| acute black tea consumption improves cutaneous vascular function in healthy middle-aged humans. | dietary flavonoids, such as those present in black tea, are associated with reduced risk of cardiovascular disease (cvd), possibly through improving nitric oxide (no) mediated vascular function. the aim of this study was to examine the effect of acute black tea ingestion on cutaneous microvascular function. | 2016 | 28034564 |
| isolation of chs gene from brunfelsia acuminata flowers and its regulation in anthocyanin biosysthesis. | chalcone synthase gene (bachs) from brunfelsia acuminata flowers was isolated using rt-pcr and race. the coding region of the gene is 1425-bp with an open reading frame of 1170-bp, 73-bp 5'utr, and 172-bp 3'utr. its deduced protein does not have a signal peptide but does contain a cond_enzyme superfamily domain, and consists of 389 amino acids with a predicted molecular mass of 42,699 da and a pi of 6.57. the deduced amino acid sequence of bachs shares 90%, 88%, 85%, 84% and 79% identity with ch ... | 2016 | 28036083 |
| green tea (camellia sinensis) for patients with knee osteoarthritis: a randomized open-label active-controlled clinical trial. | green tea is known as a dietary supplement and a novel functional food worldwide. since there are increasing preclinical evidence about efficacy of green tea for treating osteoarthritis, this study has aimed at assessing its efficacy and safety for patients with knee osteoarthritis. | 2016 | 28038881 |
| in vivo anti-arthritic efficacy of camellia sinensis (l.) in collagen induced arthritis model. | rheumatoid arthritis (ra), an autoimmune inflammatory disorder with synovial hyperplasia, destruction of cartilage, bone damage is often associated with risk of infections. such risk could be attributed towards usage of immunosuppressive agents. thus, the present study was undertaken to evaluate the anti-arthritic efficacy of aquo-alcoholic extract of camellia sinensis (l.). | 2017 | 28049097 |
| black tea consumption improves postprandial glycemic control in normal and pre-diabetic subjects: a randomized, double-blind, placebo-controlled crossover study. | postprandial glycemic control is important for prevention of diabetes. black tea consumption may improve postprandial glycemic control. the major bioactive compounds are polyphenols, black tea polymerized polyphenol (btpp).this study examined the effect of black tea consumption on postprandial blood glucose and insulin response following sucrose loading in normal and pre-diabetes subjects. | 2017 | 28049262 |
| metal transport protein 8 in camellia sinensis confers superior manganese tolerance when expressed in yeast and arabidopsis thaliana. | manganese (mn) is an important micronutrient element required for plant growth and development, playing catalytic roles in enzymes, membranes and dna replication. the tea plant (camellia sinensis) is able to accumulate high concentration of mn without showing signs of toxicity, but the molecular mechanisms underlying this remain largely unknown. in this study, the c. sinensis cultivar 'ljcy' had higher mn tolerance than cultivar 'ys', because chlorophyll content reduction was lower under the hig ... | 2017 | 28051151 |
| anxiolytic activity of aqueous extract of camellia sinensis in rats. | the present study was undertaken to evaluate anxiolytic effect of camellia sinensis (cs) and possible mechanism on acute and chronic administration in rats. | 2017 | 28066107 |
| pcl assay application in superoxide anion-radical scavenging capacity of tea camellia sinensis extracts. | plant polyphenols are known for their limiting of adverse effects on reactive oxygen species (ros) in biological systems. the photochemiluminescence (pcl) assay allows to evaluate the antiradical activity of a compound in the presence of a superoxide anion-radical (o •-), which is one of the ros directly associated with the human body. in this work, determination of the superoxide anion radical scavenging activity of different tea extracts using the pcl assay was performed. | 2017 | 28068039 |
| research on the effect of culture time on the kombucha tea beverage's antiradical capacity and sensory value. | recent consumption trends shows high consumer acceptability and growing medicinal interest in the biological value of kombucha tea. this tea is a sweetened tea leaf brew fermented with a layer containing mainly acetic acid bacteria, yeast and lactic acid bacteria. the main antioxidants in tea leaves are polyphenols, the consumption of which is proven to be beneficial for human health, e.g. protecting from reactive oxygen species (ros). the aim of the present research was to evaluate antiradical ... | 2017 | 28071022 |
| are sleep duration, midpoint of sleep and sleep quality associated with dietary intake among bavarian adults? | only few epidemiologic studies examined sleep characteristics in relation to dietary behaviour. our aim was to analyse associations of sleep duration, midpoint of sleep and sleep quality with dietary intake among the bavarian population. | 2017 | 28074892 |
| bottom-up synthesis of carbon nanoparticles with higher doxorubicin efficacy. | nanomedicine requires intelligent and non-toxic nanomaterials for real clinical applications. carbon materials possess interesting properties but with some limitations due to toxic effects. interest in carbon nanoparticles (cnps) is increasing because they are considered green materials with tunable optical properties, overcoming the problem of toxicity associated with quantum dots or nanocrystals, and can be utilized as smart drug delivery systems. using black tea as a raw material, we synthesi ... | 2017 | 28093297 |
| preclinical and potential applications of common western herbal supplements as complementary treatment in parkinson's disease. | parkinson's disease (pd) is a neurological disorder with a complex pathological etiology, which is not fully understood. progression of pd may be the result of a buildup of iron in the substantia nigra, microglia-mediated neuroinflammation, dysfunctional mitochondria, or abnormal protein handling. dopamine is the main neurotransmitter affected, but as the disease progresses, a decrease in all the brain's biogenic amines occurs. current medication used in the treatment of pd aims to prevent the b ... | 2017 | 28095073 |
| optimization of the production of 1-phenylethanol using enzymes from flowers of tea (camellia sinensis) plants. | 1-phenylethanol (1pe) can be used as a fragrance in food flavoring and cosmetic industries and as an intermediate in the pharmaceutical industry. 1pe can be synthesized from acetophenone, and the cost of 1pe is higher than the cost of acetophenone. therefore, it is important to establish an effective and low-cost approach for producing 1pe. our previous studies found that tea (camellia sinensis) flowers, which are an abundant and waste resource, contained enzymes that could transform acetophenon ... | 2017 | 28098803 |
| an appraisal of drug-drug interactions with green tea (camellia sinensis). | this review summarizes published in vitro, animal, and clinical studies investigating the effects of green tea (camellia sinensis) extract and associated catechins on drug-metabolizing enzymes and drug transporters. in vitro studies suggest that green tea extract and its main catechin, (-)-epigallocatechin-3-gallate, to varying degrees, inhibit the activity of cyp1a1, cyp1a2, cyp2b6, cyp2c8, cyp2c9, cyp2d6, and cyp3a4. ugt1a1 and ugt1a4 isoforms were also inhibited by (-)-epigallocatechin-3-gall ... | 2017 | 28118673 |
| safety evaluation of fluoride content in tea infusions consumed in the azores-a volcanic region with water springs naturally enriched in fluoride. | tea is the second most commonly consumed beverage in the world. it is well recognized that the consumption of tea in high quantities can promote the development of fluorosis. the main objective of this study is to estimate the exposure to fluoride in the azores through drinking tea prepared with water from different volcanic locations, by i) investigating the fluoride (f) content of various commercial brands of tea (camellia sinensis) marketed in azores and ii) comparing tea releasing rates of f ... | 2017 | 28120305 |
| tea polyphenols dominate the short-term tea (camellia sinensis) leaf litter decomposition. | polyphenols are one of the most important secondary metabolites, and affect the decomposition of litter and soil organic matter. this study aims to monitor the mass loss rate of tea leaf litter and nutrient release pattern, and investigate the role of tea polyphenols played in this process. high-performance liquid chromatography (hplc) and classical litter bag method were used to simulate the decomposition process of tea leaf litter and track the changes occurring in major polyphenols over eight ... | 2017 | 28124839 |
| protective effect of green tea (camellia sinensis (l.) kuntze) against prostate cancer: from in vitro data to algerian patients. | green tea (gt) has been studied for its effects as antioxidant and cancer-preventive agent. epidemiological studies showed that gt consumption decreases the risk for prostate cancer (pc). to investigate whether erythrocyte oxidative stress (os) is associated with pc and whether daily consumption of gt improves the oxidative phenotype, we performed a study in a group of algerian pc patients, preceded by an in vitro study to characterize composition and antioxidant/antiproliferative activities of ... | 2017 | 28133488 |
| [influence of luxury foodstuffs on glaucoma]. | the term "luxury foodstuffs" refers to foods which are not consumed because of their nutritional value. classic modern luxury foodstuffs are alcohol, caffeine-containing drinks, cocoa, sugar and tobacco. the following review article examines some of these modern luxury foodstuffs in detail, as well as their influence on glaucoma. thus, small quantities of alcohol lower high intraocular pressure and have a positive influence on the blood circulation of the optic nerve. in addition, red wine polyp ... | 2017 | 28142165 |
| pseudomoniasis phytotherapy: a review on most important iranian medicinal plants effective on pseudomonas aeruginosa. | pseudomonas aeruginosa is a gram-negative, aerobic bacterium found in water and soil. it is a normal flora in skin and gastrointestinal tract of human beings. p. aeruginosa as an opportunistic pathogen involved in nosocomial infections having multiple pathogenic factors and shows high rate of resistance to different antibiotics. the aim of this study was to identify the most important native medicinal plants of iran effective on p. aeruginosa. | 2016 | 28149496 |
| green tea (camellia sinensis) protects against arsenic neurotoxicity via antioxidative mechanism and activation of superoxide dismutase activity. | chronic arsenic-exposure even at a low-dose results in the neural impairment and motor/cognitive dysfunction. however, several preventive approaches are made mainly against hepatic/gastrointestinal damages. only a few investigations postulate therapeutic strategies for neural anomalies. here, the protective role of green tea (camellia sinensis or cs; 10mg/ml aqueous) has been evaluated against arsenic-induced (0.6ppm/100g bw/28 days) cerebral/cerebellar tissue degeneration, oxidative-threats and ... | 2017 | 28155600 |
| proteolysis of chloroplast proteins is responsible for accumulation of free amino acids in dark-treated tea (camellia sinensis) leaves. | shade management (dark treatment) on tea (camellia sinensis) plants is a common approach to improve free amino acids in raw materials of tea leaves. however, the reason for amino acid accumulation in dark-treated tea leaves is still unknown. in the present study, dark treatment significantly increased content of free amino acids and reduced content of soluble proteins in tea leaves. quantitative proteomics analysis showed that most enzymes involved in biosyntheses of amino acids were down-accumu ... | 2017 | 28163235 |
| resveratrol and epigallocatechin-3-gallate addition to thawed boar sperm improves in vitro fertilization. | thawing is one of the most delicate process after semen cryopreservation as spermatozoa pass from a dormant metabolic stage to a sudden awakening in cellular metabolism. the rapid oxygen utilization leads to an overproduction of reactive oxygen species that can damage sperm cells, thus causing a significant decrease of fertilizing potential of frozen-thawed spermatozoa. resveratrol (res) is a natural grape-derived phytoalexin and epigallocatechin-3-gallate (egcg) is the major polyphenol in green ... | 2017 | 28166993 |
| tea consumption and risk of bladder cancer: a dose-response meta-analysis. | background and objective: controversial results of the association between tea (black tea, green tea, mate, and oolong tea) consumption and risk of bladder cancer were reported among epidemiological studies. thus, we performed a meta-analysis of observational studies to investigate the association. methods: we searched the pubmed and embase for studies of tea consumption and bladder cancer that were published in any language up to march, 2016. cohort or case-control studies were included in the ... | 2016 | 28167914 |
| epidemiology, environmental risk factors and genetics of parkinson's disease. | parkinson's disease (pd) is a frequent neurodegenerative disease with a premotor phase that lasts several years. risk factors that have been linked to pd are tobacco, caffeine, black tea, pesticides and calcium channel blockers. some risk factors may be due to inverse causality (e.g. changes in personality during the premotor phase). the genetics of pd are complex with a contribution of mendelian (e.g. snca, lrrk2, parkin, pink1,…) and non-mendelian factors (e.g. single nucleotide polymorphisms) ... | 2017 | 28189372 |
| 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. | 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 conce ... | 2017 | 28193425 |
| xanthine alkaloids: occurrence, biosynthesis, and function in plants. | caffeine is a xanthine alkaloid found in non-alcoholic beverages such as tea, coffee, and cocoa. it was discovered in tea and coffee in the 1820s, but it was not until 2000 that details of molecular events associated with caffeine biosynthesis began to be unraveled. reviewed are the occurrence of xanthine alkaloids in the plant kingdom and the elucidation of the caffeine biosynthesis pathway, providing details of the n-methyltransferases, belonging to the motif b' methyltransferase family, which ... | 2017 | 28194561 |
| a rapid uplc method for simultaneous analysis of caffeine and 13 index polyphenols in black tea. | 2017 | 28203771 | |
| enantiomeric and quantitative analysis of volatile terpenoids in different teas (camellia sinensis). | 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 ... | 2017 | 28216091 |
| functional characterization of a new tea (camellia sinensis) flavonoid glycosyltransferase. | 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 ud ... | 2017 | 28220704 |
| antibacterial and antiadhesive activities of extracts from edible plants against soft drink spoilage by asaia spp. | 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 as ... | 2017 | 28221885 |
| sub-chronic indomethacin treatment and its effect on the male reproductive system of albino rats: possible protective role of black tea extract. | indomethacin is commonly used as a nonsteroidal anti-inflammatory drug (nsaid) to treat inflammation, arthritis and joint pains. unfortunately, it has a wide range of adverse effects on the physiological system, including gonads. this study aimed to assess possible beneficial effects of black tea extract (bte) against indomethacin-induced alteration of gonadal hormone levels in male rats. | 2017 | 28222030 |
| combined small rna and degradome sequencing reveals complex microrna regulation of catechin biosynthesis in tea (camellia sinensis). | 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 rap ... | 2017 | 28225779 |
| the use of green tea (<i>camellia sinensis</i>) as a phytogenic substance in poultry diets. | this review examined the use of green tea (camellia sinensis) in the diets of poultry. research findings were obtained from various recent studies, where much attention was focused on the role of green tea in the promotion of both animal and human health. the review involved some of the currently available information about green tea, pertaining to its chemical composition, anticoccidial and antimicrobial effect, effect on broiler and layer performance and on blood and egg yolk constituents. to ... | 2014 | 28235287 |
| developmental processes and responses to hormonal stimuli in tea plant (camellia sinensis) leaves are controlled by grf and gif gene families. | 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 structur ... | 2017 | 28236273 |
| antimutagenic and anticlastogenic effects of turkish black tea on ta98 and ta100 strains of salmonella typhimurium (in vitro) and mice (in vivo). | black tea has been reported to have significant antimutagenic and anticarcinogenic properties associated with its polyphenols theaflavins (tf) and thearubigins (tr). similarly, turkish black tea (tbt) also contains a considerable amount of tf and tr. | 2017 | 28245735 |
| study of the stereochemistry and oxidation mechanism of plant polyphenols, assisted by computational chemistry. | in recent years, plant polyphenols have attracted great attention due to their wide range of biological activities. certain kinds of polyphenols have complex structures; therefore, it is difficult to elucidate their total structure, including stereochemistry. in this study, we reinvestigated the stereostructures of two major c-glycosidic ellagitannins contained in quercus plants, vescalagin and castalagin, and revised their stereostructures based on theoretical calculations of spectroscopic data ... | 2017 | 28250332 |
| synergisms in alpha-glucosidase inhibition and antioxidant activity of camellia sinensis l. kuntze and eugenia uniflora l. ethanolic extracts. | 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. | 2017 | 28250662 |
| sclereids are strong enough to support the delicate corollas: experimental and computational data evidence from camellia sinensis (l.). | 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 thei ... | 2017 | 28252101 |
| molecular cloning and characterization of galactinol synthases in camellia sinensis with different responses to biotic and abiotic stressors. | 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 csgols genes were found to be highly up-regulated in a transcriptome library of ectropic oblique-attacked camellia sinensis. three complete csgols genes were then cloned and characterized. gene transc ... | 2017 | 28271712 |
| camellia sinensis l. extract and its potential beneficial effects in antioxidant, anti-inflammatory, anti-hepatotoxic, and anti-tyrosinase activities. | 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. ... | 2017 | 28273866 |
| intelligent evaluation of color sensory quality of black tea by visible-near infrared spectroscopy technology: a comparison of spectra and color data information. | instrumental test of black tea samples instead of human panel test is attracting massive attention recently. this study focused on an investigation of the feasibility for estimation of the color sensory quality of black tea samples using the vis-nir spectroscopy technique, comparing the performances of models based on the spectra and color information. in model calibration, the variables were first selected by genetic algorithm (ga); then the nonlinear back propagation-artificial neural network ... | 2017 | 28279828 |
| theabrownin inhibits cell cycle progression and tumor growth of lung carcinoma through c-myc-related mechanism. | 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 lin ... | 2017 | 28289384 |
| green tea and its anti-angiogenesis effects. | 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- ... | 2017 | 28292023 |
| alcohol induced hepato cardiotoxicity and oxidative damage in rats: the protective effect of n-butanol extract of green tea (camellia sinensis (l.) kuntze). | 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. | 2017 | 28294073 |
| 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. | 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 unr ... | 2017 | 28301607 |
| draft genome sequence of endophytic herbaspirillum sp. strain wt00c, a tea plant growth-promoting bacterium. | 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. | 2017 | 28302787 |
| 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. | 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 ° ... | 2016 | 28314435 |
| metabolomics analysis reveals the metabolic and functional roles of flavonoids in light-sensitive tea leaves. | as the predominant secondary metabolic pathway in tea plants, flavonoid biosynthesis increases with increasing temperature and illumination. however, the concentration of most flavonoids decreases greatly in light-sensitive tea leaves when they are exposed to light, which further improves tea quality. to reveal the metabolism and potential functions of flavonoids in tea leaves, a natural light-sensitive tea mutant (huangjinya) cultivated under different light conditions was subjected to metabolo ... | 2017 | 28320327 |
| integrated transcriptome and metabolic analyses reveals novel insights into free amino acid metabolism in huangjinya tea cultivar. | the chlorotic tea variety huangjinya, a natural mutant, contains enhanced levels of free amino acids in its leaves, which improves the drinking quality of its brewed tea. consequently, this chlorotic mutant has a higher economic value than the non-chlorotic varieties. however, the molecular mechanisms behind the increased levels of free amino acids in this mutant are mostly unknown, as are the possible effects of this mutation on the overall metabolome and biosynthetic pathways in tea leaves. to ... | 2017 | 28321230 |
| tea polyphenols inhibit the growth and virulence properties of fusobacterium nucleatum. | fusobacterium nucleatum plays a key role in creating the pathogenic subgingival biofilm that initiates destructive periodontitis. it is also a common resident of the human gastrointestinal tract and has been associated with inflammatory bowel disease. the aim of the present study was to investigate the effects of green and black tea extracts as well as two of their bioactive components, egcg and theaflavins, on the growth and virulence properties of f. nucleatum. the tea extracts and components ... | 2017 | 28322293 |
| a putative 12-oxophytodienoate reductase gene csopr3 from camellia sinensis, is involved in wound and herbivore infestation responses. | 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. i ... | 2017 | 28322995 |
| biochemical characterization and pharmacognostic evaluation of purified catechins in green tea (camellia sinensis) cultivars of india. | green tea (gt) is derived from the leaves of camellia sinensis implicated in a wide range of health attributes. in the present comprehensive study, methanolic, acetone and aqueous extract of leaves of c. sinensis var. sinensis [kashmir (kw), uttarakhand (ip & pn)] and c. sinensis var. assamica (assam, at) were explored for their phytoconstituents. solvent extracts of gt cultivars showed rich presence of phytoconstituents in comparison with aqueous extracts. the methanolic extract of at and aceto ... | 2015 | 28324294 |
| enzyme-assisted supercritical fluid extraction: an alternative and green technology for non-extractable polyphenols. | this contribution proposes an enzyme-assisted eco-friendly process for the extraction of non-extractable polyphenols (nepps) from black tea leftover (btlo), an underutilized tea waste. btlo hydrolyzed with various enzyme formulations was extracted using supercritical carbon dioxide and ethanol as co-solvent (sc-co2 + etoh). a conventional solvent extraction (cse) was performed using etoh + h2o (80:20, v/v) for comparison purposes. the results revealed that hydrolysis of btlo with 2.9% (w/w) kemz ... | 2017 | 28331956 |
| black tea supplementation augments redox balance in rats: relevance to aging. | several health beneficial effects have been attributed to tea consumption, most of the effects are due to the strong antioxidant property of tea catechins. the present study evaluates the effect of black tea extract (bte) supplementation on the redox balance of rats at different stages in their life span. we have evaluated erythrocyte and plasma redox status in young (4 months), middle-aged (12 months) and old-aged (24 months) male wistar rats, by quantifying an array of parameters linked to red ... | 2017 | 28332429 |
| metabolic flux redirection and transcriptomic reprogramming in the albino tea cultivar 'yu-jin-xiang' with an emphasis on catechin production. | 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 different ... | 2017 | 28332598 |
| identification of a novel bzip transcription factor in camellia sinensis as a negative regulator of freezing tolerance in transgenic arabidopsis. | 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 . | 2017 | 28334275 |
| 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. | 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 2 flavonols and 18 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 proli ... | 2017 | 28339202 |
| total volume and composition of fluid intake and mortality in older women: a cohort study. | the health benefits of 'drinking at least 8 glasses of water a day" in healthy individuals are largely unproven. we aimed to examine the relationship between total fluid and the sources of fluid consumption, risk of rapid renal decline, cardiovascular disease (cvd) mortality and all-cause mortality in elderly women. | 2017 | 28341683 |
| characterization of the potent odorants contributing to the characteristic aroma of matcha by gas chromatography-olfactometry techniques. | the odorants contributing to the characteristic aroma of matcha were investigated by analysis of the headspace samples and the volatile fractions prepared by a combination of solvent extraction and the safe techniques using three matcha powders of different grades (high, medium, and low). gas chromatography-olfactometry of the headspace samples (gco-h) and aroma extract dilution analysis (aeda) applied to the volatile fractions revealed 16 (fd factor ≥1) and 39 (fd factor ≥4(3)) odor-active peak ... | 2017 | 28343386 |
| evaluation of in vitro antimicrobial potential and gc-ms analysis of camellia sinensis and terminalia arjuna. | traditionally, camellia sinensis and terminalia arjuna are being used widely to cure various diseases like cardiovascular diseases, cancer etc. in the present study, extracts of these plants were evaluated for their antimicrobial activities against some human pathogenic bacteria viz. e. coli, p. aeruginosa, s. aureus and fungus c. albicans. in-vitro inhibition of these pathogenic microorganisms produced inhibition zone ranging from 9 to 18 mm. mic values of these plant extracts ranged from 6.25 ... | 2017 | 28352558 |
| black tea high-molecular-weight polyphenol-rich fraction promotes hypertrophy during functional overload in mice. | mitochondria activation factor (maf) is a high-molecular-weight polyphenol extracted from black tea that stimulates training-induced 5' adenosine monophosphate-activated protein kinase (ampk) activation and improves endurance capacity. originally, maf was purified from black tea using butanol and acetone, making it unsuitable for food preparation. hence, we extracted a maf-rich sample "e80" from black tea, using ethanol and water only. here, we examined the effects of e80 on resistance training. ... | 2017 | 28353662 |
| γ-aminobutyric acid (gaba) accumulation in tea (camellia sinensis l.) through the gaba shunt and polyamine degradation pathways under anoxia. | γ-aminobutyric acid (gaba) is an important bioactive component of tea (camellia sinensis) providing various health benefits. we studied gaba accumulation via the gaba shunt and polyamine degradation pathways under anoxia in tea leaves. anoxia caused a ∼20-fold increment in gaba concentration, relative to fresh tea leaves. this increment was due to the increase of glutamate decarboxylase and diamine oxidase activities. genes involved in gaba formation, such as csgad1 and csgad2, were significantl ... | 2017 | 28355482 |
| effective subcritical butane extraction of bifenthrin residue in black tea. | as a natural and healthy beverage, tea is widely enjoyed; however, the pesticide residues in tea leaves affect the quality and food safety. to develop a highly selective and efficient method for the facile removal of pesticide residues, the subcritical butane extraction (sbe) technique was employed, and three variables involving temperature, time and extraction cycles were studied. the optimum sbe conditions were found to be as follows: extraction temperature 45 °c, extraction time 30 min, numbe ... | 2017 | 28358319 |
| an on-line hplc system for detection of antioxidant compounds in some plant extracts by comparing three different methods. | echinacea (echinacea purpurea), green tea (camellia sinensis) and yaylacayi (thymus praecox opiz subsp. grossheimii (ronniger) jalas) are herbs used in traditional medicine because of their beneficial health effects. a high performance liquid chromatography (hplc) post-column method was developed by coupling hplc with on-line antioxidant assays using diode array (dad) and ultraviolet (uv) detectors. thus antioxidant compounds and fifteen phenolic standards were detected in echinacea, green tea a ... | 2017 | 28359985 |
| a new cineol derivative, polyphenols and norterpenoids from saharan myrtle tea (myrtus nivellei): isolation, structure determination, quantitative determination and antioxidant activity. | the phytochemical profile of decoction and infusion, obtained from the dried leaves of m. nivellei, consumed as tea in saharan region, was characterized by uhplc-pda-hrms. fourteen compounds were characterized and, to confirm the proposed structures a preparative procedure followed by nmr spectroscopy was applied. compound 3 (2-hydroxy-1,8-cineole disaccharide) was a never reported whereas a bicyclic monoterpenoid glucoside (2), two ionol glucosides (1 and 12), a tri-galloylquinic acid (4), two ... | 2017 | 28363507 |
| aluminum induced physiological and proteomic responses in tea (camellia sinensis) roots and leaves. | tea (camellia sinensis (l.) o. kuntze), is an aluminum (al) hyperaccumulator and grows well in acid soils. although al-induced growth of tea plant has been studied, the proteomic profiles of tea plants in response to al are unclear. in the present study, the proteomic profiles in tea roots and leaves under al stress were investigated using itraq proteomics approach. in total, 755 and 1059 differentially expressed proteins were identified in tea roots and leaves, respectively. kegg enrichment ana ... | 2017 | 28364710 |
| an rna-seq transcriptome analysis revealing novel insights into aluminum tolerance and accumulation in tea plant. | the tea plant ( camellia sinensis l. o. kuntze) is a high aluminum (al) tolerant and accumulator species. candidate genes related to al tolerance in tea plants were assembled based on de novo transcriptome analysis. the homologs implied some common and distinct al-tolerant mechanism between tea plants and rice, arabidopsis and buckwheat. in addition to high al tolerance, the tea plant exhibits good performance exposure to a proper al level, and accumulates high al in the leaves without any toxic ... | 2017 | 28365842 |
| genome-guided insights into the plant growth promotion capabilities of the physiologically versatile bacillus aryabhattai strain ab211. | bacillus aryabhattai ab211 is a plant growth promoting, gram-positive firmicute, isolated from the rhizosphere of tea (camellia sinensis), one of the oldest perennial crops and a major non-alcoholic beverage widely consumed all over the world. the whole genome of b. aryabhattai ab211 was sequenced, annotated and evaluated with special focus on genomic elements related to plant microbe interaction. it's genome sequence reveals the presence of a 5,403,026 bp chromosome. a total of 5226 putative pr ... | 2017 | 28377746 |
| a simple, enzymatic biotransformation method using fresh green tea leaves efficiently generates theaflavin-containing fermentation water that has potent physiological functions in mice and humans. | the polyphenolic compound theaflavin, the main red pigment in black tea, possesses many beneficial properties, such as fat-reducing and glucose-lowering capabilities. to produce theaflavin-containing fermentation water on a large scale, we have developed a simple, inexpensive, and selective enzymatic biotransformation method to obtain sufficient levels from fresh green tea leaves. subsequent administration of theaflavin-containing fermentation water to obese mice on a high-fat diet inhibited bod ... | 2017 | 28381812 |
| antimicrobial activity of aqueous extracts from four plants on bacterial isolates from periodontitis patients. | four aqueous extracts of different plant organs are the following: artemisia herba-alba, opuntia ficus-indica, camellia sinensis and phlomis crinita were evaluated against two bacterial strains: porphyromonas gingivalis and prevotella intermedia, which are implicated in periodontal diseases. by using a disc method, these plant extracts demonstrated powerful bacterial activity against these gram-negative strains. the minimum inhibitory concentration values of the four plant extracts varied betwee ... | 2017 | 28386896 |
| tea (camellia sinensis) infusions ameliorate cancer in 4ti metastatic breast cancer model. | tea (camellia sinensis) infusions are widely consumed beverages with numerous health benefits. however, physiological and molecular responses mediating these activities are poorly understood. | 2017 | 28388918 |
| mothers' consumption of soy drink but not black tea increases the flavonoid content of term breast milk: a pilot randomized, controlled intervention study. | we performed a pilot rct to prove the hypothesis that a controlled ingestion of polyphenol-rich beverages (soy drink, decaffeinated black tea) in nutritive dosages by nursing women has an effect on the composition (flavonoid concentration, total antioxidant capacity) of breast milk. | 2017 | 28391283 |
| transcriptomic analysis of the biosynthesis, recycling, and distribution of ascorbic acid during leaf development in tea plant (camellia sinensis (l.) o. kuntze). | ascorbic acid (asa), known as vitamin c, is an essential nutrient for humans and mainly absorbed from food. tea plant (camellia sinensis (l.) o. kuntze) leaves can be a dietary source of asa for humans. however, experimental evidence on the biosynthesis, recycling pathway and distribution of asa during leaf development in tea plants is unclear. to gain insight into the mechanism and distribution of asa in the tea plant leaf, we identified 18 related genes involved in asa biosynthesis and recycli ... | 2017 | 28393854 |
| bionic multi-tentacled ionic liquid-modified silica gel for adsorption and separation of polyphenols from green tea (camellia sinensis) leaves. | for the first time, a new kind of bionic multi-tentacled ionic liquid-modified silica gel was synthesized and used as selective adsorbent in the preparative separation of tea polyphenols (tp) from green tea leaves. it was found that silica particles with polyvinyl alcohol chains modified by n-methyl imidazole proline salt (pva·im+·pro-@sio2) had the excellent performance in selective adsorption as well as fine separation for target compounds. the new adsorbent exhibited high adsorption capacity ... | 2017 | 28407961 |
| pestalotiopsis and allied genera from camellia, with description of 11 new species from china. | a total of 124 pestalotiopsis-like isolates associated with symptomatic and asymptomatic tissues of camellia sinensis and other camellia spp. from eight provinces in china were investigated. based on single- and multi-locus (its, tef, tub2) phylogenies, as well as morphological characters, host associations and geographical distributions, they were classified into at least 19 species in three genera, i.e. neopestalotiopsis, pestalotiopsis and pseudopestalotiopsis. eight novel species in pestalot ... | 2017 | 28408743 |
| chitosan-induced immunity in camellia sinensis (l.) o. kuntze against blister blight disease is mediated by nitric-oxide. | blister blight disease, caused by an obligate biotrophic fungal pathogen, exobasidium vexans massee is posing a serious threat for tea cultivation in asia. as the use of chemical pesticides on tea leaves substantially increases the toxic risks of tea consumption, serious attempts are being made to control such pathogens by boosting the intrinsic natural defense responses against invading pathogens in tea plants. in this study, the nature and durability of resistance offered by chitosan and the p ... | 2017 | 28412634 |
| spontaneously assembled nano-aggregates in clear green tea infusions from camellia ptilophylla and camellia sinensis. | tea nano-aggregates spontaneously assembled in clear tea infusions are considered as the precursors of tea cream, although their molecular basis remains obscure. here, we characterized nano-aggregates in green tea infusions from camellia ptilophylla, a peculiar tea variety with 6.0% of theobromine, and camellia sinensis as the control for comparative purpose. numerous negatively charged spherical colloidal particles of 50-100 nm in diameter were primarily found in both green tea infusions. catec ... | 2017 | 28412808 |
| impact of light irradiation on black tea quality during withering. | black tea manufacture usually involves the processes of withering, cutting, fermentation and drying. the aim of present study was to evaluate the effect of the relationship between the quality and withering with different light sources (ultraviolet, yellow, blue, purple, orange, red, cyan, green and white) an quality attribute of tea. the results indicated that the yellow, orange and red light withering significantly improved the aroma and taste, imparting the tea a sweet flavor and a fresh and ... | 2017 | 28416872 |
| quality, antioxidant activity and composition of indian black teas. | a comparative study was undertaken to determine the difference in quality, antioxidant activity, and mineral content of northern and southern indian tea varieties. the results showed that the antioxidant activity, theaflavin and thearubigin content, color particle size and total soluble solids influence the tea leaf and tea dust. assam leaf showed higher values for all the physico-chemical properties followed by darjeeling leaf. in addition, the mineral composition of the tea infusion was also i ... | 2017 | 28416877 |
| regulation of anthocyanin biosynthesis in purple leaves of zijuan tea (camellia sinensis var. kitamura). | plant anthocyanin biosynthesis is well understood, but the regulatory mechanism in purple foliage tea remains unclear. using isobaric tag for relative and absolute quantification (itraq), 815 differential proteins were identified in the leaves of zijuan tea, among which 20 were associated with the regulation of anthocyanin metabolism. we found that the abundances of anthocyanin synthesis-related enzymes such as chalcone synthase, chalcone isomerase, dihydroflavonol 4-reductase and anthocyanin sy ... | 2017 | 28422049 |