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Attanayake, R.N.
- Genotypic and seasonal variations of catechin and caffeine content in exotic collection of tea [Camellia sinensis (L.) O. Kuntze] germplasm in Sri Lanka
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Authors
J. D. Kottawa-Arachchi
1,
M.A.B. Ranatunga
1,
A.M.T. Amarakoon
1,
M.T.K. Gunasekare
1,
R.K. Sharma
1,
H.K. Chaudhary
1,
V.K. Sood
1,
R. Katoch
1,
D.K. Banyal
1,
E.N.U. Edirisinghe
1,
R.N. Attanayake
1
Affiliations
1 Department of Genetics and Plant Breeding, College of Agriculture CSK Himachal Pradesh Krishi Vishvavidyalaya, Palampur-176 062, IN
1 Department of Genetics and Plant Breeding, College of Agriculture CSK Himachal Pradesh Krishi Vishvavidyalaya, Palampur-176 062, IN
Source
Himachal Journal of Agricultural Research, Vol 48, No 01 (2022), Pagination: 8-16Abstract
The quality of made tea is largely dependent on the key metabolites viz. caffeine and flavan-3-ols. The aim of the present study was to quantify flavan-3-ols and caffeine of Sri Lankan exotic tea germplam. Fresh leaf flavan-3- ols; catechin (+C), epicatechin (EC), epicatechingallate (ECg), epigallocatechin (EGC) and epigallocatechingallate (EGCg), caffeine and gallic acid of 58 accessions (54 exotic and 4 improved cultivars) were performed by High Performance Liquid Chromatography (HPLC). Variation in metabolites among cultivars and seasons were determined. Among the flavan-3-ols, EGCg was the most abundant followed by EGC, ECg, EC and +C. Hierarchical clustering of 58 accessions based on metabolite diversity resulted in two major clusters. High caffeine containing accessions (>30 mg g-1) of Indian origin and improved TRI cultivars clustered together. Low caffeine accessions such as PBGT10, PBGT27, PBGT35, PBGT71, PBGT48, PBGT53 and PBGT54 (< 20 mg g-1) grouped separately. Higher variations in catechins and caffeine content in exotic germplasm is useful in developing tea cultivars of high quality tea.
Keywords
Tea quality, Camellia sinensis, flavan-3-ols, caffeine, seasonal variationsFull Text
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