Tea ( Camellia sinensis ) cultivated in three agro-ecological regions of Bangladesh: Unveiling the variability of methylxanthine, bioactive phenolic compound, and antioxidant activity

被引：0

作者：

Abdullah, Abu Tareq Mohammad ^{[1
]}

Sayka, Mahbuba Ibrahim ^{[2
]}

Rahman, Mohammad Mahfuzur ^{[1
]}

Sharif, Miskat ^{[1
]}

Khan, Tanzir Ahmed ^{[1
]}

Jahan, Sharmin ^{[1
]}

Mazumdar, Reaz Mohammad ^{[3
]}

Uddin, Mohammad Nashir ^{[4
]}

Hoque, Md. Mozammel ^{[2
]}

机构：

[1] Bangladesh Council Sci & Ind Res BCSIR, Inst Food Sci & Technol IFST, Dhaka 1205, Bangladesh

[2] Shahjalal Univ Sci & Technol, Dept Food Engn & Tea Technol, Sylhet, Bangladesh

[3] Bangladesh Council Sci & Ind Res BCSIR, Pilot Plant & Proc Dev Ctr PP & PDC, Dhaka 1205, Bangladesh

[4] Bangladesh Council Sci & Ind Res BCSIR, BCSIR Dhaka Labs, Dhaka 1205, Bangladesh

来源：

HELIYON | 2024年 / 10卷 / 07期

关键词：

Tea(Camelliasinensis); Antioxidant profile; Methylxanthine; Polyphenol; Ecological variation; Canonical discriminant function; CAFFEINE; GREEN; CLIMATE; BLACK; THEOBROMINE; EXTRACTION; CATECHINS; THEOPHYLLINE; POLYPHENOLS; FLAVONOIDS;

D O I：

10.1016/j.heliyon.2024.e28760

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

Tea (Camellia sinensis) is a widely consumed beverage known for its numerous health benefits, largely attributed to its rich content of quality determining secondary metabolites such as methylxanthine compounds and bioactive phenolic compounds. The goal of this study was to find out variations of the levels of methylxanthines, bioactive phenolic compounds, and antioxidant activity in methanolic and hot water extracts of 129 tea samples grown in three different ecological regions of Bangladesh named Panchagar, Sylhet, and Chattogram. Methylxanthine and bioactive phenolic compounds were determined by using HPLC-DAD, and the antioxidant profile was analysed by UV-vis spectrophotometric methods for methanol and hot water extracts of tea leaves. The IC50 values showed the trend as Panchagar > Sylhet > Chattogram and Sylhet > Chattogram > Panchagar for water and methanol extract, respectively. The results revealed significant (p < 0.05) variations in the levels of methylxanthines content: Panchagar > Chattogram > Sylhet. Caffeine was significantly higher (103.02 +/- 5.55 mg/g of dry extract) in the methanolic extract of tea leaves of Panchagar district and lower (53.33 +/- 4.30 mg/g of dry extract) in the hot water extract of Sylhet district. Panchagar and Chattogram possessed significantly (p < 0.05) higher catechin content for methanol (57.01 +/- 5.50 mg/g dry extract) and hot water (55.23 +/- 4.11 mg/g dry extract) extracts, respectively. The utilization of canonical discriminant functions yielded highly favorable outcomes in the classification of tea from three distinct cultivation origins in Bangladesh, relying on their inherent features. This study demonstrated the potential effects of geographical variations on the bioactive compounds and antioxidant properties of tea, emphasizing the importance of regional differences in tea cultivation for optimizing its health benefits as well as dispersing tea cultivation across the country.

引用

页数：13