Nova Biologica Reperta

Evaluation of some biochemical characteristics of walnut kernels (Juglans regia L.) in different habitats in western Iran

Document Type : Original Article

Authors

Saiedeh Salavati 1
Mehdi Kakaei 2

1 Department of Agricultural Sciences, Faculty of Technology and Engineering, Payame Noor University, Tehran, Iran.

2 Department of Agricultural Sciences, Faculty of Technology and Engineering, Payame Noor University, Tehran,

https://doi.org/10.22034/nbr.2026.11738
Abstract
Objective: Walnut is classified as a strategic species for human nutrition and is an important product widely used in the pharmaceutical and cosmetic industries for its green husk, shell, kernel, and leaves.
Methods: To investigate the biochemical properties of walnut kernels in some regions of western Iran (Hamedan, Kurdistan, Kermanshah provinces), an experiment was designed, and walnuts were collected from three ecotypes: Tuyserkan, Marivan, Kangavar and the total phenolic content, flavonoids, antioxidant capacity of the kernels were studied.
Results: Results of variance analysis for each trait showed significant differences in total phenolic content, flavonoids, and antioxidant activity among the three sites. The highest and lowest total phenolic content was observed in walnuts from Tuyserkan and Kangavar, respectively. The highest flavonoid content was found in the kernels of Tuyserkan walnuts, while the lowest was in Marivan walnuts; the highest antioxidant capacity was also obtained from the kernels of Tuyserkan county.
Conclusion: Therefore, it appears that among the studied regions, Tuyserkan County provides better conditions for the growth and accumulation of biochemical compounds in walnut kernels, making Tuyserkan walnuts suitable for both the food industry as a quality nut and for the pharmaceutical and cosmetic industries due to their favorable biochemical properties.

Keywords

Antioxidant
Ecotype
Flavonoid
Total Phenol
Tuyserkan
Subjects
Nova Biologica Reperta
Volume 13, Issue 2
Spring 2026
Pages 1-19

  • Receive Date 12 March 2026
  • Revise Date 30 June 2026
  • Accept Date 27 July 2026
  • Publish Date 23 August 2026

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