SOIL AND CLIMATE DETERMINE ANTIOXIDANT CAPACITY OF WALNUTS

  • Fernando Figueroa Faculty of Health Sciences, Catholic University of Murcia, Avda Los Jerónimos s/n, Murcia 30107, Spain.
  • Javier Marhuenda Faculty of Health Sciences, Catholic University of Murcia, Avda Los Jerónimos s/n, Murcia 30107, Spain.
  • Amadeo Gironés-Vilaplana Department of Food Technology, EPSO, University Miguel Hernández, Ctra. Beniel km. 3.2, 03312 Orihuela, Alicante, Spain
  • Débora Villaño Faculty of Health Sciences, Catholic University of Murcia, Avda Los Jerónimos s/n, Murcia 30107, Spain.
  • Adela Villaño Faculty of Health Sciences, Catholic University of Murcia, Avda Los Jerónimos s/n, Murcia 30107, Spain.
  • Juana Mulero Faculty of Health Sciences, Catholic University of Murcia, Avda Los Jerónimos s/n, Murcia 30107, Spain.
  • Begoña Cerdá Faculty of Health Sciences, Catholic University of Murcia, Avda Los Jerónimos s/n, Murcia 30107, Spain.
  • Pilar Zafrilla Faculty of Health Sciences, Catholic University of Murcia, Avda Los Jerónimos s/n, Murcia 30107, Spain.

Abstract

Factors as variety, soil and climatic conditions can influence the nutritional composition of walnuts and its resultant biological activity. The aim of this work was to study the influence of soil and climate factors in the antioxidant capacity of 10 different varieties of nuts, obtained from two experimental cultivars with different weather and soil conditions. Ten different varieties of walnut samples were obtained from two experimental cultivars, analyzing the antioxidant capacity by ORAC, DPPH• and ABTS+ methods. Eureka and Tehama walnuts showed the highest antioxidant capacity. Only Chico and Serr varieties (measured by ABTS+ method) and Franquette variety (measured by ORAC assay) increased their antioxidant capacity when cultured in Torre Blanca plots. The growing in El Chaparral plots increased the antioxidant capacity of every different variety. Minor temperature (especially when it reaches over -0 ºC) and humidity, as well as an increase on the annual rainfall are noteworthy factors that influence on the increase of antioxidant capacity of the wide majority of the analyzed walnuts.

Keywords: Antioxidant capacity, Climate, Nut, Soil, Walnut
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How to Cite
Figueroa, F., J. Marhuenda, A. Gironés-Vilaplana, D. Villaño, A. Villaño, J. Mulero, B. Cerdá, and P. Zafrilla. “SOIL AND CLIMATE DETERMINE ANTIOXIDANT CAPACITY OF WALNUTS”. Emirates Journal of Food and Agriculture, Vol. 29, no. 7, Nov. 2017, pp. 557-61, doi:https://doi.org/10.9755/ejfa.2016-10-1390. Accessed 28 Sept. 2021.
Section
Regular Articles