Article
Horticulture
Cara Still, Jacob Snelling, Shawn Mehlenbacher, Ryan Contreras
Summary: This study evaluated the use of SSR markers developed in Buddleja for cultivar identification. The markers Bud_03, Bud_10, and Bud_13 were found to be polymorphic and capable of accurately identifying cultivars. These markers may be useful for breeders in protecting their intellectual property and for identifying mislabeled cultivars.
Article
Engineering, Chemical
D. L. Meneses, Y. Ruiz, E. Hernandez, F. L. Moreno
Summary: The study demonstrated that block freeze-concentration is an effective technique for increasing catechin and polyphenol content in green tea, while preserving antioxidant activity and maintaining physicochemical parameters and sensory attributes.
JOURNAL OF FOOD ENGINEERING
(2021)
Article
Biochemistry & Molecular Biology
Jiachun Lu, Yanyan Cao, Yani Pan, Sifan Mei, Gang Zhang, Qiang Chu, Ping Chen
Summary: The major kokumi compounds in green tea infusion responsible for the kokumi taste are identified as gamma-Glu-Gln and GSH. L-theanine enhances the kokumi taste of green tea infusion. These findings have the potential to improve the flavor of tea beverages.
Article
Nutrition & Dietetics
Yue Yue Sheng, Jing Xiang, Kai Rong Wang, Ze Yu Li, Kai Li, Jian Liang Lu, Jian Hui Ye, Yue Rong Liang, Xin Qiang Zheng
Summary: Squalene, a precursor of steroids with diverse bioactivities, was found in tea leaves and its content varied among different cultivars. The squalene content in tea leaves increased with leaf maturity, and the old leaves from the previous year had the highest level of squalene. The squalene levels also differed significantly among the 30 cultivars tested, with cultivar Pingyun having the highest level. The old tea leaves and pruned littering can serve as alternative sources for natural squalene extraction.
FRONTIERS IN NUTRITION
(2022)
Article
Food Science & Technology
Jie Zhao, Wenwen Liu, Yan Chen, Xin Zhang, Xu Wang, Fuhua Wang, Yongzhong Qian, Jing Qiu
Summary: This study identified potential markers for tea authenticity assessment using non-targeted metabolomics in unique oolong tea cultivars. A classification model based on these markers was developed and successfully discriminated the oolong tea samples. The combination of non-targeted metabolomics and chemometric methods can provide high resolution markers for tea authenticity assessment.
Article
Biochemistry & Molecular Biology
Mengyuan Zhang, Zhuo Li, Zijian Wang, Yao Xiao, Lu Bao, Min Wang, Chuanjing An, Yuefang Gao
Summary: This study identified RNA editing sites in the chloroplast and mitochondrial genomes of Camellia sinensis, highlighting the impact of RNA editing on plant development and gene expression. The analysis revealed changes in base preference, conserved motifs, and structural alterations, providing comprehensive insights into RNA editing events in tea plants.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2022)
Article
Chemistry, Applied
Yuming Wei, Xuchao Yin, Huiting Wu, Mengjie Zhao, Junlan Huang, Jixin Zhang, Tiehan Li, Jingming Ning
Summary: The present study aimed to improve the poor flavor of Summer green tea (SGT) by yellowing process. The results showed that the yellowing process increased the sweetness and overall acceptability of SGT, and decreased the bitterness and astringency. The concentration of certain aroma compounds changed after yellowing, resulting in grassy, floral, fruity, mushroom, and sweet aromas. Addition of selected aroma compounds further enhanced the sweetness and umami of SGT, demonstrating the improvement of flavor through odor-taste interactions.
Review
Biochemistry & Molecular Biology
Tiantian Zhao, Chao Li, Shuai Wang, Xinqiang Song
Summary: Green tea, as an unfermented tea rich in natural substances, has shown versatile pharmacological activities including antioxidant, anticancer, hypoglycemic, antibacterial, antiviral, and neuroprotective effects. However, concerns have been raised regarding the toxic effects of green tea extract and its main ingredients such as hepatotoxicity and DNA damage. Despite this, green tea has promising practical prospects in health care and disease prevention, with potential uses in treating diabetes, Alzheimer's disease, oral cancer, and dermatitis.
Article
Plant Sciences
Wenzhao Wang, Xingcui Xie, Yuanyuan Lv, Haonan Guan, Lu Liu, Qian Huang, Yumeng Bao, Jie Zhou, Lu Bao, Chunmei Gong, Youben Yu
Summary: In this study, a new workflow was developed to identify phenolamides in different tissues and organs of tea plants, and their mass spectra were documented. It was found that tea plants primarily accumulate protonated aliphatic phenolamides. The distribution of phenolamides in tea plants is specific to certain tissues and acyl-acceptors, and some of these compounds show resistance to the tea anthracnose pathogen. These findings provide new insights into the resistance of tea anthracnose.
HORTICULTURE RESEARCH
(2023)
Article
Horticulture
Qin-Ling Liu, Xiao-Xiang Li, Yi-Han Xu, Liu-Bin Wang, Kai-Ling Chang, Yang Yang, Qian Tang, Li-Qiang Tan
Summary: The study found a strong inbreeding depression of fitness traits in the first selfing generation of the purple tea cultivar 'Ziyan', while the impacts on secondary metabolites were not consistent, with a possible homozygous lethal allele found on LG03. These findings have useful implications for inbred line-based breeding and research in tea plants.
SCIENTIA HORTICULTURAE
(2021)
Article
Plant Sciences
M. Tolmie, M. J. Bester, J. C. Serem, M. Neil, Z. Apostolides
Summary: This study found that green and purple teas are affordable and widely available natural sources with antidiabetic properties, and that purple tea ellagitannins and urolithins also have additional antidiabetic effects.
JOURNAL OF ETHNOPHARMACOLOGY
(2023)
Review
Infectious Diseases
Steve Kgotlelelo Mahlake, Caven Mguvane Mnisi, Cebisa Kumanda, Doctor Mziwenkosi Nhlanhla Mthiyane, Peter Kotsoana Montso
Summary: The misuse of antibiotics in poultry feeds has negative impacts on production, but green tea products show potential as alternatives that can improve growth performance and health status of poultry, contributing to sustainable and organic production systems.
Review
Food Science & Technology
Jianlong Li, Yangyang Xiao, Xiaochen Zhou, Yinyin Liao, Shuhua Wu, Jiaming Chen, Jiajia Qian, Ying Yan, Jinchi Tang, Lanting Zeng
Summary: This review summarizes the characteristics and associated regulatory mechanisms of specific tea germplasms in China, including germplasms that specifically accumulate metabolites, the metabolic flux between catechins and anthocyanins, the differential abundance of L-theanine between tea and other plants, the expression of caffeine synthase genes in low-caffeine tea germplasms, and the characteristics of high-aroma and high-chlorophyll germplasms.
FOOD RESEARCH INTERNATIONAL
(2022)
Article
Horticulture
Mengyuan Zhang, Yiqing Zhao, Yang Meng, Yao Xiao, Jiqiang Zhao, Bin Xiao, Chuanjing An, Yuefang Gao
Summary: In this study, 578 CsPPR genes were identified in tea plants, with analysis on their structures and evolutionary relationships. It was found that 22 genes might be related to the etiolation and albino process of tea plants, and 3 potential key genes were identified to be closely associated with the albino and etiolation of tea leaves.
SCIENTIA HORTICULTURAE
(2022)
Article
Food Science & Technology
Ronimara A. Santos, Emmanuele D. S. Andrade, Mariana Monteiro, Eliane Fialho, Jerson L. Silva, Julio B. Daleprane, Danielly C. Ferraz da Costa
Summary: This study demonstrates the potential efficacy of green tea extract in chemoprevention of breast cancer, showing selective effects on breast tumor cells without cytotoxicity on non-tumoral cells. The mechanism involves regulation of p53 and p21 gene expression to induce apoptosis and inhibit cell migration in breast tumor cells.