Abstract
Capitatae Fructus (CF), an ethnomedicinal resource with both edible and medicinal values in Southwest China, has an incomplete quality evaluation system, and the regulatory mechanisms of environmental factors on its bioactive component accumulation remain unclear. In this study, 37 CF batches from 6 producing areas in Sichuan and Yunnan Provinces were analyzed. High-performance liquid chromatography (HPLC) was used to establish a fingerprint with good precision and reproducibility and conduct multi-component quantitative analysis, combined with hierarchical cluster analysis (HCA), Correlation analysis, principal component analysis (PCA), and hierarchical partitioning (HP) to investigate CF’s chemical characteristics and environmental regulation patterns. Results showed an HPLC fingerprint of CF was successfully constructed, with 15 common peaks matched and 5 key bioactive compounds (gallic acid, hyperoside, isoquercitrin, quercitrin, quercetin) identified. HCA classified the samples into two distinct clusters: the first cluster covers low-, medium-, and high-altitude regions, among which the gallic acid contents (L26, L27) and quercetin content (L28) from Miyi County (low-altitude area) are higher than those of other sample batches. In contrast, the second cluster, concentrated in medium-altitude regions, generally exhibits lower contents of key components. Results from PCA show that sample L28 (Miyi County, low-altitude area) has the highest comprehensive score, which further confirms this altitude-related distribution characteristic of the compounds in CF. Correlation analysis was conducted to examine relationships between the 5 key compounds, showing that gallic acid was significantly positively correlated with hyperoside (r = 0.46, P < 0.01), and hyperoside was extremely significantly positively correlated with isoquercitrin (r = 0.91, P < 0.001). HP analysis was used to eliminate multicollinearity among environmental factors, confirming annual total solar radiation and annual cumulative ultraviolet radiation as core regulatory factors for CF component accumulation. Among the 5 compounds, gallic acid and hyperoside exhibited the highest sensitivity to environmental changes (R² = 0.76 and 0.71, respectively). Based on the above findings, Miyi County was identified as a high-quality producing area for CF, with gallic acid and hyperoside confirmed as the core quality indicators of CF. East longitude was determined to be the main environmental factor affecting CF component accumulation, while Annual Total Solar Radiation, Annual Cumulative Ultraviolet Radiation, and Annual Total Solar Radiation Difference were the synergistic driving factors. This study initially established a quality evaluation system for CF, providing support for its standardized development and sustainable utilization.
Data availability
The data presented in this study are available upon request from the corresponding author.
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Funding
This research was funded by the Fundamental Research Funds from Sichuan College of Traditional Chinese Medicine, grant number 24ZRYB04.
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Hairong Zhong: Conceptualization, Methodology, Investigation, Data curation, Writing—original draft. Qing Xia: Methodology, Formal analysis, Validation, Writing—original draft. Ying Li: Resources, Investigation, Species identification of experimental samples, Data curation. Linchang Tubi: Sample collection, Field investigation, Data curation. Aji Lege: Resources, Supervision, Project administration. Kelong Aluo: Software, Visualization, Data analysis. Jinsong Ren: Supervision, Funding acquisition, Project administration, Writing – review & editing. Xiaoli Eqi: Conceptualization, Supervision, Writing—review & editing, Project administration.
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All experimental research and field studies on plants (both cultivated and wild), including the collection of plant materials, were performed in accordance with relevant institutional, national, and international guidelines and legislation. Specifically, the plant materials used in this study are wild plants, and their collection strictly adhered to the provisions of protected wild plant management regulations and ethical norms.
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Zhong, H., Xia, Q., Li, Y. et al. Quality evaluation of Capitatae Fructus from different geographical regions in China.
Sci Rep (2025). https://doi.org/10.1038/s41598-025-32517-6
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DOI: https://doi.org/10.1038/s41598-025-32517-6
Keywords
Capitatae Fructus
- HPLC fingerprint
- Quantitative analysis
- Quality evaluation
- Environmental regulation
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