scholarly journals UPLC-MS based metabolomics analysis reveals metabolite compositional differences between Kenyan Commercial and NonCommercial black tea (Camellia sinensis L.) cultivars.

2021 ◽  
Author(s):  
Christopher Nyarukowa
Keyword(s):  
Drought Tolerance ◽  
Camellia Sinensis ◽  
Antioxidant Properties ◽  
Epigallocatechin Gallate ◽  
Black Tea ◽  
Global Supply Chains ◽  
Tea Quality ◽  
Production And Consumption ◽  
Health Promoting ◽  
Tea Production

Camellia sinensis (L.) O. Kuntze (tea) is one of the most widely consumed beverages across the world, serving as an essential commodity crop for several developing countries. A bulk of tea’s health-promoting properties are attributed to the antioxidant properties of EGCg, its predominant polyphenol. As a result of these health benefits, tea production and consumption has expanded and promoted the development of tea industries globally. Tea cultivation is dependent on a good distribution of rainfall, and the current changes in climate pose a significant threat to its global supply chains. Through the efforts of the International Centre for Tropical Agriculture (CIAT), predictions of future climate changes in the tea growing regions of Kenya between now and 2050 have been generated. A study was conducted to develop models to identify key tea growing regions that will remain ideal for tea farming and also investigate the metabolomic differences between 243 drought susceptible NonCommercial (NComm) and 60 Commercial (Comm) cultivars. Non-targeted, high-resolution UPLC-MS was used to attain a new profound understanding of the metabolomic multiplicity between the Comm and NComm groups and to elucidate their association with tea liquor quality and drought tolerance. Several metabolites, namely argininosuccinate, caffeic acid, caffeine, catechin, citric acid, epicatechin, epigallocatechin gallate, gallic acid, gluconic acid, glucose, maltose, quercetin and theanine were found to clearly differentiate between the Comm and NComm cultivars. These detected metabolites were linked to improved tea quality and drought tolerance in the Comm cultivars.

Identification of novel QTL for black tea quality traits and drought tolerance in tea plants (Camellia sinensis)

2018 ◽  
Vol 14 (1) ◽  
Author(s):  
Robert K. Koech ◽  
Pelly M. Malebe ◽  
Christopher Nyarukowa ◽  
Richard Mose ◽  
Samson M. Kamunya ◽  
...  
Keyword(s):  
Drought Tolerance ◽  
Camellia Sinensis ◽  
Black Tea ◽  
Quality Traits ◽  
Tea Quality ◽  
Tea Plants

Genome‐enabled prediction models for black tea ( Camellia sinensis ) quality and drought tolerance traits

2020 ◽  
Vol 139 (5) ◽  
pp. 1003-1015
Author(s):  
Robert K. Koech ◽  
Pelly M. Malebe ◽  
Christopher Nyarukowa ◽  
Richard Mose ◽  
Samson M. Kamunya ◽  
...  
Keyword(s):  
Drought Tolerance ◽  
Camellia Sinensis ◽  
Prediction Models ◽  
Black Tea

Konsentrasi Polyfenol pada Teh Hitam Celup Komersial Produksi Perkebunan Teh di Jawa Tengah

METANA ◽  
2021 ◽  
Vol 17 (2) ◽  
pp. 55-60
Author(s):  
Edy Supriyo ◽  
Isti Pudjihastuti
Keyword(s):  
Sea Level ◽  
Camellia Sinensis ◽  
Black Tea ◽  
Enzymatic Oxidation ◽  
Polyphenol Content ◽  
Central Java ◽  
Production Processes ◽  
Significant Difference ◽  
Tea Plantations ◽  
Tea Production

Teh merupakan minuman yang dihasilkan dari pucuk daun tanaman Camellia sinensis  yang tumbuh di pegunungan pada ketinggian 600–2500 m dpl. Teh hitam merupakan jenis teh yang banyak dikonsumsi masyarakat Indonesia. Teh ini diproduksi dengan cara fermentasi melalui proses oksidasi enzimatis katekin oleh polifenol oksidase. Teh hitam yang dikemas dalam bentuk the celup banyak digemari konsumen.  Tujuan dari penelitian ini mengetahui konsentrasi polyfenol dalam teh hitam celup komersial. Sampel teh hitam celup komersial dengan merk dagang TP, TDT, TB, TL,  TD, dan TM diproduksi oleh enam perkebunan teh di Jawa Tengah yang diperoleh secara acak dari swalayan di Kota Semarang.   Kandungan polyfenol pada sampel teh hitam celup dianalisa dengan menggunakan spetrofotometer UV-Vis pada panjang gelombang 725nm. Hasil penelitian menunjukkan bahwa teh hitam celup komersial yang beredar di Kota Semarang telah memenuhi  standard SNI 3753–2014, dengan rata-rata konsentrasi polyfenol 8,83-43,63 %b/b. Analisa Zscore  menunjukkan tidak ada perbedaan yang sangat nyata antar konsentrasi polyfenol di enam sampel teh hitam celup komersial, hal ini dimungkinkan dengan adanya standarisasi proses produksi teh hitam di berbagai industri teh di Indonesia. Dan teh hitam celup komersial TDT mempunyai konsentrasi polyfenol diatas rata-rata yaitu 43,63 % b/b.    Tea is a drink produced from the leaves of the Camellia sinensis plant that thrives in the mountains at an altitude of 600–2500 m above sea level. Black tea is a type of tea that is widely consumed by Indonesian people. Black tea is produced by fermentation, namely the process of enzymatic oxidation of catechins by polyphenol oxidase. Black tea is produced in several packages, including as black tea bags. The purpose of this study was to determine the concentration of polyphenols in commercial black tea bags. Samples of commercial black tea bags with the trademarks TP, TDT, TB, TL, TD, and TM were produced by six tea plantations in Central Java which were obtained randomly from supermarkets/stores in Semarang City. The polyphenol content in black teabag samples was analyzed using a UV-Vis spectrophotometer at a wavelength of 725nm. The results showed that the commercial black tea bags marketed in the Semarang City had met the standards of SNI 3753–2014, with an average polyphenol concentration of 8.83-43.63% w/w. The Zscore analysis showed that there was no significant difference between the concentrations of polyphenols in the six samples of commercial black tea bags, this may cause by the standardization of black tea production processes in various tea industries in Indonesia, but commercial black tea bags with the trademark TDT had polyphenol concentrations above the average is 43.63% w/w.

scholarly journals Combined linkage and association mapping of putative QTLs controlling black tea quality and drought tolerance traits

Euphytica ◽  
2019 ◽  
Vol 215 (10) ◽  
Author(s):  
Robert. K. Koech ◽  
Richard Mose ◽  
Samson M. Kamunya ◽  
Zeno Apostolides
Keyword(s):  
Drought Tolerance ◽  
Association Mapping ◽  
Black Tea ◽  
Putative Qtls ◽  
Tea Quality

scholarly journals Functional annotation of putative QTL associated with black tea quality and drought tolerance traits

2019 ◽  
Vol 9 (1) ◽  
Author(s):  
Robert. K. Koech ◽  
Pelly M. Malebe ◽  
Christopher Nyarukowa ◽  
Richard Mose ◽  
Samson M. Kamunya ◽  
...  
Keyword(s):  
Drought Tolerance ◽  
Functional Annotation ◽  
Black Tea ◽  
Tea Quality

scholarly journals Chemometrical analysis of Fourier Transform Infrared Spectrum profile of Indonesia’s black tea products (Camellia sinensis L.)

2019 ◽  
Vol 10 (1) ◽  
pp. 4721-4727
Keyword(s):  
Principal Component Analysis ◽  
Fourier Transform ◽  
Volatile Compounds ◽  
Camellia Sinensis ◽  
Principal Component ◽  
Ethanol Extract ◽  
Fourier Transform Infrared ◽  
Black Tea ◽  
Tea Quality ◽  
And Cluster Analysis

Black tea (Camellia sinensis L.) is one of the most popular beverage ingredients in Indonesia. Generally, tea quality assessment is done by tea taster using the organoleptic method with evaluation based on shape, color, aroma, and taste. In this research, an alternative method of testing black tea product quality with FTIR (Fourier Transform Infrared) was developed. The variability of chemical composition is an important factor that determines flavor (taste and aroma) and health benefits. The sample of black tea tested came from 12 products circulating in Indonesia. A chemometric analysis of Principal Component Analysis and Cluster Analysis was used to support the analysis of specific differences of each FTIR spectra of samples. The analysis results of water and ethanol extract showed that the two solvents extracted the different of the variety of metabolite contents. Analysis of volatile compounds was also performed which also showed that each sample contained the different volatile compounds; which then is predicted can be investigated further to determine the black tea’s quality.

scholarly journals WORLD TEA MARKET: TRENDS IN PRODUCTION AND CONSUMPTION

2020 ◽  
pp. 131-145
Author(s):  
M. N. Eliseev ◽  
O. M. Alekseeva ◽  
O. A. Kosareva
Keyword(s):  
Consumer Preferences ◽  
General Structure ◽  
Black Tea ◽  
Economic Entity ◽  
Production And Consumption ◽  
Tea Production ◽  
Import And Export ◽  
The Russian Federation ◽  
Abc Analysis

The article analyzes the main trends and prospects for the development of the global and Russian tea market. It reviews and analyzes the main directions of development of the tea market in the world, provides an international classification of black tea, shows the main countries manufacturers, importers and exporters of this product. The dynamics of tea production, import and export in the Russian Federation over five years showed in this article by using analytical indicators. Also were identified the main reasons for the changes and analyzed the leading players-producers of the domestic tea market, as well as showed the main trends characteristic of the development of this market in immediate prospects. The article considers the general structure of the tea market in natural terms and provides the results of analysis of changes in consumer preferences. Within the framework of the study, the assortment of the Perekrestok retail network was studied as a tool for forming and maintenance commodity stocks of this economic entity. ABC-analysis was used to analyze the assortment of black tea. Based on the results of the study, recommendations were developed and proposed for further work with the assortment of this product group.

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