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Articles

Influence of the growing degree-days on chemical and technological properties of chestnut fruits (var. “Judia”)

Influencia de días-grado en la composición química y propiedades tecnológicas del fruto de castaña (var. “Judia”)

, , , , , , , & show all
Pages 216-224 | Received 06 May 2011, Accepted 28 Sep 2011, Published online: 23 Feb 2012
 

Abstract

The influence of different edaphoclimatic conditions in “Judia” variety from seven different localities in the Trás-os-Montes region was evaluated with respect to metabolites, fatty acids, and technological properties. Significant correlations between edaphoclimatic conditions and moisture content, crude protein and especially fatty acids were investigated. Alfândega da Fé, with 2032 °D (degree-day), has the best corrected caliber and the lowest percentage of depth kernel wrinkles. However, the coldest localities (1597 °D and 1971 °D) had the highest moisture, crude protein, soluble sugars, and starch content and a clear prevalence of polyunsaturated fatty acids. The moisture loss of the chestnut fruits was also different among localities, which could lead to a different economic value. This study is important because it supplies the knowledge that trees from the same variety can produce different quality fruits depending on their origin of growth and the influence of different edaphoclimatic conditions.

La influencia de diferentes condiciones edafoclimáticas en la variedad “Judia” de siete diferentes localidades de la región de Trás-os-Montes fue evaluada con respecto a los metabolitos, los ácidos grasos y propiedades tecnológicas. Se encontraron correlaciones significativas entre las condiciones edafoclimáticas y contenido de humedad, proteína cruda y, sobre todo, en los ácidos grasos. En Alfândega da Fé, con 2032 °D, se produjeron las castañas con el mejor calibre corregido y el porcentaje más bajo de las arrugas de profundidad. Sin embargo, las localidades más frías (1597 °D y 1971 °D) presentaron el mayor contenido de humedad, proteína cruda, azúcares solubles y contenido de almidón, y un claro predominio de ácidos grasos poliinsaturados. La pérdida de humedad de los frutos de castaño (con cáscara) también fue diferente entre localidades, lo que puede repercutir en un menor valor económico de la producción. Este estudio es importante porque nos da a conocer que árboles de la misma variedad presentan frutos de diferente calidad en función de su origen y de la influencia de diferentes condiciones edafoclimáticas.

Acknowledgments

The authors are grateful to the FCT (Foundation for Science and Technology, Portugal) for financial support of the scholarship of Lia-Tânia Rosa Dinis (SFRH/BD/29220/2006). They also thank the Assistant-technician Maria Natália Campos Teixeira for the support given to the laboratorial work.

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