Principal component analysis based clustering of UPASI tea cultivars for their diversity on free radical scavenging activity.

摘要

Principal component analysis was used to group tea cultivars based on total catechins and polyphenols activity against free radicals such as DPPH and hydroxyl radicals. UPASI-17 had the highest polyphenols and catechin content, as well as the highest radical scavenging activity compared to the other cultivars. 4 distinct groups were identified. Results suggest the method may be suitable for screening new tea varieties, and help in the production of high free radical scavenging black tea.