| Title: | Aroma profiles of green tea made with fresh tea leaves plucked in summer |
| Author(s): | Guo X; Ho CT; Schwab W; Wan X; |
| Address: | "State Key Laboratory of Tea Plant Biology and Utilization, Anhui Agricultural University, 130 Changjiang Ave W., Hefei, Anhui 230036, People's Republic of China; International Joint Laboratory on Tea Chemistry and Health Effects, Anhui Agricultural University, 130 Changjiang Ave W., Hefei, Anhui 230036, People's Republic of China; College of Chemistry and Environmental Engineering, Shenzhen University, Shenzhen 518060, People's Republic of China. International Joint Laboratory on Tea Chemistry and Health Effects, Anhui Agricultural University, 130 Changjiang Ave W., Hefei, Anhui 230036, People's Republic of China; Department of Food Science, Rutgers University, New Brunswick, NJ 08901, USA. Electronic address: ctho@sebs.rutgers.edu. International Joint Laboratory on Tea Chemistry and Health Effects, Anhui Agricultural University, 130 Changjiang Ave W., Hefei, Anhui 230036, People's Republic of China; Biotechnology of Natural Products, Technische Universitat Munchen, Liesel-Beckmann-Str. 1, 85354 Freising, Germany. State Key Laboratory of Tea Plant Biology and Utilization, Anhui Agricultural University, 130 Changjiang Ave W., Hefei, Anhui 230036, People's Republic of China; International Joint Laboratory on Tea Chemistry and Health Effects, Anhui Agricultural University, 130 Changjiang Ave W., Hefei, Anhui 230036, People's Republic of China. Electronic address: xcwan@ahau.edu.cn" |
| DOI: | 10.1016/j.foodchem.2021.130328 |
| ISSN/ISBN: | 1873-7072 (Electronic) 0308-8146 (Linking) |
| Abstract: | "There is a claim that fresh tea leaves plucked in summer (FTL-S) are not suitable for green tea processing, but there is no scientific evidence to support this claim. The aroma properties of green tea (GT-S) made with FTL-S were studied by the analysis of volatiles during process, coupled with odor activity value (OAV) determination. The odor profiles of dry tea and tea infusion were investigated by sensory evaluation. The GT-S contained higher proportions of alcohols, alkenes and heterocyclic compounds with strong fragrance and nutty odors as well as moderate floral odor in comparison with FTL-S. beta-Damascenone and 2-ethyl-3,5-dimethylpyrazine with the OAV of 54,290 and 1.15, respectively, were the aroma-active compounds imparting woody and nutty odors in GT-S, respectively. Current study provides an alternative way to use FTL-S for green tea production, and we also found that L-theanine is an important aroma precursor for the formation of green tea aroma" |
| Keywords: | Gas Chromatography-Mass Spectrometry *Odorants/analysis Plant Leaves/chemistry Tea *Volatile Organic Compounds/analysis L-theanine Odor activity value (OAV) Odor profiles Sensory evaluation Summer green tea Tea aroma characteristic; |
| Notes: | "MedlineGuo, Xiangyang Ho, Chi-Tang Schwab, Wilfried Wan, Xiaochun eng England 2021/06/19 Food Chem. 2021 Nov 30; 363:130328. doi: 10.1016/j.foodchem.2021.130328. Epub 2021 Jun 9" |
