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April 19, 2026PlantsOpen Access

A Comparative Study of Phenolics in Green Husks of Selected Hungarian Walnut Cultivars

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Authors

LKLaurine KithiESEnikő Horváthné SzanicsMBMária Berki

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Overview

Comparative study analyzes phenolic content in walnut husks, suggesting climate and cultivar affect biosynthesis.

Key Points

  • This study aims to evaluate the total phenolic content and individual phenolics in green husks of different walnut cultivars.
  • Characterization of phenolic content in green husks from four Hungarian cultivars and one U.S. cultivar.
  • Extraction of phenolic compounds using aqueous organic solvents.
  • Quantification of phenolic content using HPLC-DAD and qualitative identification via HPLC-MS.
  • Application of linear mixed-effects models to analyze effects of cultivar, year, sampling time, and cumulative growing degree days.
  • Total phenolic content ranged from 34.9 to 57.2 mg GAE g−1 DW across cultivars.
  • Phenolic levels peaked during early lignification and full maturity, with lower concentrations at mid-development stages.
  • Cultivar Esterhazy kései exhibited significantly higher phenolic levels compared to Chandler in 2024.
  • Cumulative growing degree days explained a notable portion of variation in total phenolic content.

Cite This Study

Kithi et al. (2026) studied this question.

synapsesocial.com/papers/69e471c5010ef96374d8dfa8https://doi.org/10.3390/plants15081245
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