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Regional quality differences in Zanthoxylum bungeanum using sensor-based analysis and climate factors.

Xitong Fei1, Lei Ma2, Anzhi Wei2

  • 1College of Forestry, Northwest Agriculture and Forestry University, Xianyang 712100, China; Northwest Agriculture and Forestry University Shenzhen Research Institute, Shenzhen 51800, China; Key Comprehensive Laboratory of Forestry of Shaanxi Province, Northwest Agriculture and Forestry University, Yangling 712100, Shaanxi, China; Research Centre for Engineering and Technology of Zanthoxylum State Forestry Administration, Yangling, Xianyang 712100, China.

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|June 14, 2025
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Summary

This study links Zanthoxylum bungeanum (red pepper) quality to climate. Key aroma and flavor compounds correlate with precipitation, temperature, and sunshine, aiding objective quality assessment.

Keywords:
Electronic noseElectronic tongueMultivariate analysisQuality evaluationRed pepper

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Area of Science:

  • Agricultural Science
  • Food Science
  • Analytical Chemistry

Background:

  • Zanthoxylum bungeanum (red pepper) quality varies significantly across regions.
  • Lack of a standardized evaluation system hinders objective quality assessment.

Purpose of the Study:

  • To investigate the relationship between climate factors and Zanthoxylum bungeanum fruit quality.
  • To establish a basis for objective quality differentiation of red pepper from different production areas.

Main Methods:

  • Integrated multi-dimensional analyses: electronic nose/tongue, Gas Chromatography-Mass Spectrometry (GC-MS), High-Performance Liquid Chromatography (HPLC).
  • Principal Component Analysis (PCA)-entropy modeling and correlation analysis were employed.
  • Eight core production areas were analyzed.

Main Results:

  • Three distinct climate types were identified across the production areas.
  • Primary aroma compounds (e.g., limonene, myrcene) correlated with annual precipitation.
  • Hydroxy-α-sanshool, a key flavor metabolite, showed positive correlations with average annual temperature and sunshine duration.

Conclusions:

  • Climate significantly influences Zanthoxylum bungeanum fruit quality.
  • Identified climate-quality linkages provide a foundation for objective quality evaluation.
  • This research may contribute to developing standardized frameworks for red pepper quality assessment.