ArticleFrontiers in plant science2019
Seasonal Theanine Accumulation and Related Gene Expression in the Roots and Leaf Buds of Tea Plants (
Article in Frontiers in plant science, 2019. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 27 papers.
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27 citing papers in PubMed, 66 citations in OpenAlex.
- The dual fate of L-theanine in tea: Metabolic regulation and processing transformations.Journal of advanced research · 2026Review
- The TaERF3-Plants (Basel, Switzerland) · 2026Article
- Promoting L-theanine accumulation in Camellia sinensis through irrigation with Pseudomonas knackmussii.Plant cell reports · 2025Article
- Variation analysis and quantitative trait loci mapping of 16 free amino acid traits in the tea plant (Camellia sinensis).BMC plant biology · 2025Article
- L-Theanine Metabolism in Tea Plants: Biological Functions and Stress Tolerance Mechanisms.Plants (Basel, Switzerland) · 2025Review
- Gibberellin promotes theanine synthesis by relieving the inhibition of CsWRKY71 onHorticulture research · 2025Article
- Fertilizer Effects on the Nitrogen Isotope Composition of Soil and Different Leaf Locations of PottedPlants (Basel, Switzerland) · 2024Article
- CsMYB73 negatively regulates theanine accumulation mediated byHorticulture research · 2024Article
- Influence of Organic and Inorganic Fertilizers on Tea Growth and Quality and Soil Properties of Tea Orchards' Top Rhizosphere Soil.Plants (Basel, Switzerland) · 2024Article
- Arbuscular mycorrhizal fungi enhance nitrogen assimilation and drought adaptability in tea plants by promoting amino acid accumulation.Frontiers in plant science · 2024Article
- Article
- Nitrogen transport and assimilation in tea plant (Frontiers in plant science · 2023Review
- CsGDH2.1 negatively regulates theanine accumulation in late-spring tea plants (Horticulture research · 2023Article
- The biosynthesis of EGCG, theanine and caffeine in response to temperature is mediated by hormone signal transduction factors in tea plant (Frontiers in plant science · 2023Article
- Single-cell transcriptome atlas reveals developmental trajectories and a novel metabolic pathway of catechin esters in tea leaves.Plant biotechnology journal · 2022Article
- Differential regulation and preventive mechanisms of green tea powder with different quality attributes on high-fat diet-induced obesity in mice.Frontiers in nutrition · 2022Article
- Color Shade Nets Affect Plant Growth and Seasonal Leaf Quality ofFrontiers in nutrition · 2022Article
- L-Theanine: A Unique Functional Amino Acid in Tea (Frontiers in nutrition · 2022Review
- The GC-TOF/MS-based Metabolomic analysis reveals altered metabolic profiles in nitrogen-deficient leaves and roots of tea plants (Camellia sinensis).BMC plant biology · 2021Article
- The tea plant CsLHT1 and CsLHT6 transporters take up amino acids, as a nitrogen source, from the soil of organic tea plantations.Horticulture research · 2021Article
Corrections and comments
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Authors and funding
8 authors at 1 institution in 1 country.
Funding
No grant is acknowledged in the PubMed record.
Abstract
Theanine, a unique and abundant non-proteinogenic amino acid in tea, confers to the tea infusion its umami taste and multiple health benefits. Its content in new tea shoots is dynamic in winter and spring. However, its seasonal accumulation pattern and the underlying regulation mechanism of tea plants remain largely unknown. In this study, we measured the theanine contents in the roots and leaf buds of 13 tea cultivars at four time points from winter to spring (Dec. 12, Mar. 1, Mar. 23, and Apr. 13). We found theanine accumulated significantly in the roots to as high as ∼6% dry weight. We found theanine content in the roots was constant or slightly decreased on Mar. 1 compared with Dec.12 but increased consistently on Mar. 23 and then decreased on Apr. 13 in all 13 cultivars. In the leaf buds, theanine content kept increasing from Mar. 1 to Mar. 23 and decreasing from Apr. 13 in most of the 13 cultivars, meaning it was probably both season- and developmental stage-dependent. The expression of theanine biosynthesis and amino acid transporter genes in the roots and buds at the four time points was then examined. The correlation analyses between the gene expression and theanine content suggested the expression of theanine-biosynthesis genes was generally and negatively correlated with theanine content; however, the expression of amino acid transporter genes including
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