Prioritising the Replanting Schedule of Seedling Tea Fields on Tea Estates for Drought Susceptibility Measured by the SWAPDT Method in the Absence of Historical In-filling Records

Nyarukowa, Christopher; Koech, Robert; Loots, Theodor; Hageman, Jos A.; Apostolides, Zeno

doi:10.5539/jas.v10n7p26

Cited by 2 publications

(2 citation statements)

References 10 publications

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“…About 500 grams fresh shoots comprising two leaves and a bud were harvested from the respective tea bushes, between September 2013 and February 2014. The fresh shoots were placed in appropriately labelled zip-lock plastic bags (Nyarukowa et al, 2018). The plastic bags were placed on ice blocks to keep cool until processing at the TRI mini-factory within 24 hours.…”

Section: Sample Collection and Processingmentioning

confidence: 99%

Untargeted metabolomics reveals differences between commercial and non-commercial Camellia sinensis cultivars used in black tea production

Nyarukowa

Reenen

Koech

et al. 2021

J. Plant Biochem. Biotechnol.

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Tea (Camellia sinensis) has enthralled both consumers and researchers, and its popularity has increased, due to its taste, aroma and its medicinal attributes, owed largely to its metabolites.The catechins and theaflavins in green and black tea, respectively, have been documented to possess anti-oxidant, anti-inflammatory, anti-cancer, as well as cardiovascular diseasepreventing properties. Tea consumers concern themselves with the quality of tea, in particular, its taste and aroma based on which consumers are willing to pay premium prices for the best quality teas. In turn, the quality of tea is undeniably affected by variations in its metabolite composition. In this study, two groups of black tea cultivars, one commercial and the second non-commercial, were compared using a metabolomics approach. Data were generated via untargeted GC-MS and semi-targeted 1 H-NMR. The GC-MS results differentiated between the two groups, based on arabinose, sucrose, phloroglucinol and xylonic acid. The 1 H-NMR results differentiated between the two groups, based on caffeine, catechin, EC, EGC, and the amino acids alanine, isoleucine, leucine, theanine, and valine. These metabolites applicability in the discrimination of newly developed cultivars into potentially commercialisable and non-commercialisable groups at an early stage in the tea improvement programme is demonstrated. This information may also help tea breeders to select promising high quality black and drought tolerant improved tea cultivars either for release or further field evaluations.

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Section: Sample Collection and Processingmentioning

confidence: 99%

Untargeted metabolomics reveals differences between commercial and non-commercial Camellia sinensis cultivars used in black tea production

Nyarukowa

Reenen

Koech

et al. 2021

J. Plant Biochem. Biotechnol.

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show abstract

“…The fresh shoots were placed in appropriately labelled zip-lock plastic bags (C.T. Nyarukowa et al, 2018). The plastic bags were placed on ice blocks to keep cool until processing at the TRI mini-factory within 24 hours.…”

Section: Sample Collec On and Processingmentioning

confidence: 99%

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

Nyarukowa¹,

Koech²,

Kamunya³

et al. 2021

NRFHH

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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.

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Prioritising the Replanting Schedule of Seedling Tea Fields on Tea Estates for Drought Susceptibility Measured by the SWAPDT Method in the Absence of Historical In-filling Records

Cited by 2 publications

References 10 publications

Untargeted metabolomics reveals differences between commercial and non-commercial Camellia sinensis cultivars used in black tea production

Untargeted metabolomics reveals differences between commercial and non-commercial Camellia sinensis cultivars used in black tea production

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

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