Article
Plant Sciences
Golam Jalal Ahammed, Xin Li
Summary: This article discusses the health benefits of tea and the role of plant hormones in improving the levels of beneficial compounds in tea. The biosynthesis of polyphenols, catechins, theanine, and caffeine in tea is strongly influenced by environmental conditions. Optimal hormone combinations may help maintain tea quality, benefiting both consumers and producers.
PLANT PHYSIOLOGY AND BIOCHEMISTRY
(2022)
Article
Agriculture, Multidisciplinary
Guangbiao She, Shuwei Yu, Zhenguo Li, Anqi Peng, Penghui Li, Yingying Li, Manman Chang, Linlin Liu, Qi Chen, Chengying Shi, Jun Sun, Jian Zhao, Xiaochun Wan
Summary: Theanine is a key amino acid in tea plants, responsible for the umami taste and mental health benefits of tea. This study reveals that the synthesis of theanine is mediated by a glutamine synthetase gene CsTSI. The expression of CsTSI is closely correlated with the levels of theanine and glutamine in various tissues. These findings provide new insights into the biosynthesis of theanine and may facilitate the development of high-theanine tea plants to improve the nutritional benefits of tea.
JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY
(2022)
Article
Horticulture
Fangfang Huang, Ying Li, Peidi Yang, Zhong hua Liu, Jian 'an Huang, Ligui Xiong, Juan Li
Summary: This study investigated the differences in theanine and catechin concentrations in different tea plant cultivars harvested in spring and summer, as well as the expression levels of genes associated with their biosynthesis. The results revealed seasonal variations in the accumulation of theanine and catechins, as well as identified key genes related to their synthesis.
SCIENTIA HORTICULTURAE
(2022)
Review
Plant Sciences
YiQin Chen, YunFei Li, ChengWen Shen, LiZheng Xiao
Summary: Tea plant and its leaves play a crucial role in tea cultivation and processing. A bibliometric analysis of 971 publications on fresh tea leaves-related research revealed the development stages, authorship collaboration, research topics, and hotspots in this field. China, the Chinese Academy of Agricultural Sciences, and Xiaochun Wan were identified as the most influential country, institution, and author, respectively. The research topics focused on key genes' regulation mechanism, essential compounds' metabolism and features, and tea plants' growth and stress responses.
FRONTIERS IN PLANT SCIENCE
(2023)
Article
Plant Sciences
Manman Chang, Jingyu Ma, Ying Sun, Liying Tian, Linlin Liu, Qi Chen, Zhaoliang Zhang, Xiaochun Wan, Jun Sun
Summary: This study reveals that Theanine, an important secondary metabolite in tea, is regulated by light. It was found that light up-regulates the expression of CsGGT2 gene, which affects the accumulation of Theanine. CsGGT2 encodes an enzyme that has both synthesis and degradation functions of Theanine. Therefore, light regulates the degradation of Theanine in tea plants by regulating the expression of CsGGT2 gene.
PLANT CELL AND ENVIRONMENT
(2023)
Article
Plant Sciences
Xiangxiang Huang, Qian Tang, Qin Li, Haiyan Lin, Juan Li, Mingzhi Zhu, Zhonghua Liu, Kunbo Wang
Summary: This study investigated the effects of foliar spraying with Bacillus amyloliquefaciens biofertilizers on tea leaf quality. The results showed that catechin and caffeine levels decreased, while theanine level increased in tea leaves after foliar spraying with B. amyloliquefaciens.
PLANT PHYSIOLOGY AND BIOCHEMISTRY
(2022)
Review
Biotechnology & Applied Microbiology
Shijia Lin, Ziping Chen, Tingting Chen, Weiwei Deng, Xiaochun Wan, Zhaoliang Zhang
Summary: Theanine, the most abundant amino acid in tea leaves, contributes to the taste, relaxation-promoting effects, and health benefits of tea. Recent advances have been made in understanding its metabolism, transport, and regulation in tea plants. This knowledge can be applied to improve the quality of non-tea crops by synthesizing theanine.
CRITICAL REVIEWS IN BIOTECHNOLOGY
(2023)
Article
Chemistry, Applied
Bo Zhou, Yiyong Chen, Lanting Zeng, Yingying Cui, Jianlong Li, Hao Tang, Jiayu Liu, Jinchi Tang
Summary: The long-term cultivation of tea plants without fertilization can decrease yield and affect the quality of tea, particularly its color, taste, and aroma. This study provides important information regarding the effects of soil nutrient deficiency on tea quality and the rational fertilization of tea gardens.
Article
Plant Sciences
Nianci Xie, Chenyu Zhang, Pinqian Zhou, Xizhi Gao, Minghan Wang, Shuanghong Tian, Cui Lu, Kunbo Wang, Chengwen Shen
Summary: The albino zone of the tea plant variety showed a lack of photosynthetic pigments but higher levels of total amino acids and theanine. Transcriptomic analysis revealed differences in carbon metabolism, nitrogen metabolism, and amino acid biosynthesis among the different zones.
PLANT PHYSIOLOGY AND BIOCHEMISTRY
(2021)
Article
Plant Sciences
Ziping Chen, Shijia Lin, Juan Li, Tingting Chen, Quan Gu, Tianyuan Yang, Zhaoliang Zhang
Summary: Salt stress increased the accumulation of various amino acids and theanine in tea plants, suggesting the induction of theanine biosynthesis. Applying theanine enhanced the salt stress tolerance and antioxidant activity in new shoots. The study indicated that theanine-induced salt stress tolerance is mediated by a CAT-dependent redox homeostasis pathway.
FRONTIERS IN PLANT SCIENCE
(2021)
Article
Forestry
Ziwen Zhou, Na Chang, Yaning Lv, Hong Jiang, Cheng Yao, Xiaochun Wan, Yeyun Li, Xianchen Zhang
Summary: This study investigated the effect of plant growth-promoting rhizobacteria on the synthesis of theanine in tea roots. It was found that Bacillus can increase the availability of potassium in the soil, leading to increased theanine synthesis in tea roots.
Review
Food Science & Technology
Shiqi Zhao, Haiyan Cheng, Ping Xu, Yuefei Wang
Summary: This review summarizes the distribution and change characteristics of the main flavor-contributing metabolites in different varieties, organs, and environmental stresses of tea plants. The regulating mechanisms involved in the biosynthesis of these metabolites are discussed based on existing evidence. The review provides insights for future research on characteristic secondary metabolites and breeding programs in tea plants.
CRITICAL REVIEWS IN FOOD SCIENCE AND NUTRITION
(2022)
Article
Agriculture, Multidisciplinary
Jing Li, Qing-Hui Li, Xu-Yang Zhang, Lu-Yu Zhang, Pei-Ling Zhao, Ting Wen, Jia-Qi Zhang, Wen-Luan Xu, Fei Guo, Hua Zhao, Yu Wang, Pu Wang, De-Jiang Ni, Ming-Le Wang
Summary: Short-term magnesium deficiency partially improves quality constituents of tea leaves, while long-term magnesium deficiency can lead to decreased quality, with increased bitterness, astringency, and decreased umami taste. Global transcriptome changes and differential gene expression are observed in response to magnesium deficiency, affecting biosynthesis of flavonoids, caffeine, theanine, and other secondary metabolisms.
JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY
(2021)
Article
Agriculture, Multidisciplinary
Tianyuan Yang, Yunxia Xie, Xin Lu, Xiaomei Yan, Yan Wang, Jingzhen Ma, Xunmin Cheng, Shijia Lin, Shilai Bao, Xiaochun Wan, William J. Lucas, Zhaoliang Zhang
Summary: The study found that shading can increase the theanine content in different parts of tea plants, especially in the roots where the theanine level was significantly increased. This suggests that shading promotes the biosynthesis and distribution of theanine in tea plants.
JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY
(2021)
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.
Article
Plant Sciences
Yi Zhang, Yi Liang, Jing Han, Xiaohui Hu, Xiaojing Li, Hailiang Zhao, Longqiang Bai, Yu Shi, Golam Jalal Ahammed
Summary: Photoperiod and iron nutrition have important effects on tomato plant growth and fruit quality. Extending the illumination time to 16 h improves reproductive development, while foliar spray with iron improves photosynthetic characteristics and fruit quality.
JOURNAL OF PLANT GROWTH REGULATION
(2023)
Article
Plant Sciences
Lan Zhang, Zheng Zhang, Golam Jalal Ahammed, Xiaorong Wang, Huihan Fang, Peng Yan, Li-Ping Zhang, Shibei Ge, Jianyu Fu, Wen-Yan Han, Xin Li
Summary: 24-epibrassinolide (EBR) can improve tea resistance against the fungal pathogen Colletotrichum fructicola by inducing lignin synthesis in tea leaves.
JOURNAL OF PLANT GROWTH REGULATION
(2023)
Article
Plant Sciences
Yanliang Guo, Jingyi Zhu, Jiahe Liu, Yuxing Xue, Jingjing Chang, Yong Zhang, Golam Jalal Ahammed, Chunhua Wei, Jianxiang Ma, Pingfang Li, Xian Zhang, Hao Li
Summary: Melatonin delays leaf senescence by inducing RBOHD-dependent H2O2 production, triggering [Ca2+](cyt) accumulation, and inhibiting K+ efflux in response to ABA.
PLANT CELL AND ENVIRONMENT
(2023)
Article
Engineering, Environmental
Xiaohua Peng, Nannan Wang, Shuangsheng Sun, Lijiahong Geng, Ning Guo, Airong Liu, Shuangchen Chen, Golam Jalal Ahammed
Summary: The overuse of pesticides has caused serious global concerns for food safety and environmental pollution. This study reveals that exogenous melatonin treatment can significantly reduce the residue of chlorothalonil in tomato leaves, while inhibition of endogenous melatonin accumulation increases the residue. Furthermore, melatonin treatment improves photosynthesis and antioxidant enzyme activity in tomato leaves. The reduction of pesticide residue is mediated by H2O2 signaling in an apoplastic manner.
JOURNAL OF HAZARDOUS MATERIALS
(2023)
Article
Endocrinology & Metabolism
Md. Kamrul Hasan, Qu-Fan Xing, Can-Yu Zhou, Kai-Xin Wang, Tong Xu, Ping Yang, Zhen-Yu Qi, Shu-Jun Shao, Golam Jalal Ahammed, Jie Zhou
Summary: Research shows that high concentrations of carbon dioxide can lead to increased accumulation of melatonin in tomato leaves, and this response is conserved in many plant species. Manipulating the levels of melatonin affects the accumulation of sugar and starch in tomato leaves, as well as the expression of chloroplast and nuclear-encoded photosynthetic genes. Furthermore, melatonin plays a crucial role in enhancing plant tolerance to heat stress, regulating reactive oxygen species, redox homeostasis, cellular protein protection, and phytohormone metabolism.
JOURNAL OF PINEAL RESEARCH
(2023)
Article
Horticulture
Golam Jalal Ahammed, Xin Li
Summary: Dopamine, a natural amine compound, has strong antioxidant capacity and can enhance plant tolerance to abiotic stressors. It promotes photosynthetic pigment concentrations, CO2 assimilation, and plant growth. Additionally, dopamine alleviates oxidative stress and aids nutrient acquisition by regulating ion transporters. It also activates xenobiotic detoxification pathways under organic pollutant stress.
SCIENTIA HORTICULTURAE
(2023)
Article
Plant Sciences
Kainan Zhao, Ming Huang, Youjun Li, Jinzhi Wu, Wenzhong Tian, Junhong Li, Yuanquan Hou, Shanwei Wu, Jun Zhang, Zhenwang Zhang, Zhiming Zhao, Golam Jalal Ahammed, Guoqiang Li
Summary: Organic fertilizer and straw return are sustainable measures that can improve crop productivity and soil fertility. A study on rainfed maize-wheat rotation in the southeast Loess Plateau showed that the combination of organic fertilizer and straw return increased summer maize yield and water use efficiency, while reducing nitrate-N accumulation in the deep soil layer.
JOURNAL OF SOIL SCIENCE AND PLANT NUTRITION
(2023)
Article
Plant Sciences
Golam Jalal Ahammed, Yaxian Wu, Yameng Wang, Tianmeng Guo, Rubya Shamsy, Xin Li
Summary: Catechins, particularly EGCG, are important secondary metabolites found in tea plants. The synthesis of catechins is affected by various environmental stresses, and their accumulation is closely related to plant stress tolerance. Additionally, exogenous catechin application has been shown to enhance various aspects of plant growth and development under perturbed conditions. However, high concentrations of catechins can be phytotoxic. This article reviews the biological functions of catechins, particularly EGCG, in plants and discusses their roles in plant adaptation to variable environments as well as their effects on plant growth and adaptation in other plant species. Overall, catechins play a critical role in plant environmental adaptability and immune response, and their properties can be utilized to enhance crop production in an environmentally friendly manner.
ENVIRONMENTAL AND EXPERIMENTAL BOTANY
(2023)
Article
Environmental Sciences
Golam Jalal Ahammed, Rubya Shamsy, Airong Liu, Shuangchen Chen
Summary: Chromium (Cr) is a toxic element that harms all forms of life, including plants. Industrial discharges and mining contribute to Cr release into the soil environment, leading to reduced crop yield and quality. Arbuscular mycorrhizal fungi (AMF) form mutualistic symbiotic relationships with land plants, enhancing plant resilience to Cr stress and aiding in nutrient acquisition. AMF symbiosis has promising prospects in agricultural production, bioremediation, and ecological restoration in Cr-polluted soils.
ENVIRONMENTAL POLLUTION
(2023)
Article
Engineering, Environmental
Shuangsheng Sun, Airong Liu, Zhe Li, Tianmeng Guo, Shuangchen Chen, Golam Jalal Ahammed
Summary: Chromium is a toxic heavy metal for animals and plants. The multifunctional signaling molecule melatonin can confer plant tolerance to chromium stress by inducing the accumulation of anthocyanin, a secondary metabolite. Melatonin increases both endogenous and exogenous anthocyanin content, alleviates chromium phytotoxicity, and reduces chromium accumulation in roots and leaves. Suppression of anthocyanin biosynthesis compromises melatonin-induced anthocyanin accumulation and alleviation of chromium phytotoxicity, suggesting that anthocyanin acts downstream of melatonin and is essential for melatonin-induced chromium stress tolerance in tomato plants.
JOURNAL OF HAZARDOUS MATERIALS
(2023)
Article
Engineering, Environmental
Qufan Xing, Md. Kamrul Hasan, Zhichao Li, Ting Yang, Weiduo Jin, Zhenyu Qi, Ping Yang, Guanghui Wang, Golam Jalal Ahammed, Jie Zhou
Summary: Cadmium (Cd) pollution poses a serious threat to crop production. This study investigated the hormonal regulation of phytochelatin (PC) synthesis and the role of melatonin in enhancing plant resistance to Cd stress in tomato. Results showed that Cd stress decreased chlorophyll content and CO2 assimilation rate, but increased Cd, H2O2, and MDA accumulation in the shoot, particularly in PCs deficient plants. Exogenous melatonin treatment increased endogenous melatonin and PC contents, alleviated oxidative stress, and improved osmotic balance and nutrient absorption. These findings provide insights into the mechanism of melatonin-regulated PC synthesis and its potential to enhance plant resistance to toxic metal stress.
JOURNAL OF HAZARDOUS MATERIALS
(2023)
Article
Plant Sciences
Ding -Ding Zuo, Golam Jalal Ahammed, Da -Long Guo
Summary: Plants face adverse environmental conditions, especially due to global climate change, which greatly impacts crop growth and productivity. To cope, plants have developed transcriptional memories from stress exposure, enabling them to better respond and adapt to future stresses. Understanding the molecular mechanisms behind plant transcriptional memory can contribute to breeding stress-tolerant crops and improving agricultural yield and quality under changing climates.
PLANT PHYSIOLOGY AND BIOCHEMISTRY
(2023)
Article
Plant Sciences
Zhe Li, Golam Jalal Ahammed
Summary: Due to climate change, rapid industrialization, and increased use of agrochemicals, abiotic stress has become a serious problem in global agriculture. Anthocyanins, an important plant pigment, provide protection for plants under stress and are used as sunscreens, antioxidants, and metal chelators. Plant hormones such as abscisic acid, jasmonic acid, ethylene, and gibberellin play a role in regulating anthocyanin synthesis and can enhance plant stress resistance. Further research is needed to explore the potential of using plant hormones to improve plant stress tolerance in practical crop production.
PLANT PHYSIOLOGY AND BIOCHEMISTRY
(2023)
Article
Public, Environmental & Occupational Health
Yi Zhang, Qianling Wang, Zhuoyan Zhu, Qiao Zong, Xiaoyan Wu, Fangbiao Tao
Summary: Unhealthy lifestyle behaviors (ULBs) are relatively common in Chinese children and adolescents, and are associated with emotional and behavioral problems (EBPs). This study investigated the link between ULBs clusters and EBPs among Chinese children and adolescents, and found that high-risk ULBs, high-risk dietary ULBs, and highest risk ULBs were positively correlated with EBPs. Children and adolescents who reported engaging in multiple ULBs were also more likely to have poorer EBPs status.
PSYCHOLOGY HEALTH & MEDICINE
(2023)
Review
Plant Sciences
Zhe Li, Golam Jalal Ahammed
Summary: Global climate change has led to an increase in extreme weather events and non-biological stress on plants. Anthocyanins, as natural pigments, play a vital role in helping plants cope with environmental stress. However, the synthesis and stability of anthocyanins are influenced by external factors. This review explores the regulatory mechanisms of anthocyanin synthesis, the effects of environmental factors on anthocyanin production, and the role of anthocyanins in plants' response to various environmental stressors.
