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Vitamin E composition of walnuts (Juglans regia L.): a 3-year comparative study of different cultivars.
J Agric Food Chem. 2005 Jun 29; 53(13):5467-72.JA

Abstract

The tocopherol and tocotrienol composition of walnuts (Juglans regia L.) was determined for nine cultivars (cvs. Arco, Franquette, Hartley, Lara, Marbot, Mayette, Mellanaise, Parisienne, and Rego). Walnuts were harvested over three consecutive years from two different geographical origins (Bragança and Coimbra, Portugal), for a total of 26 samples. The methodology employed was a normal-phase high-performance liquid chromatography coupled to a series arrangement of a diode array detector followed by a fluorescence detector, allowing the simultaneous analysis of all tocopherols and tocotrienols. The analyses showed that all samples presented a similar qualitative profile composed of five compounds: alpha-tocopherol, beta-tocopherol, gamma-tocopherol, delta-tocopherol, and gamma-tocotrienol. gamma-Tocopherol was the major compound in all samples, ranging from 172.6 to 262.0 mg/kg, followed by alpha- and delta-tocopherols, ranging from 8.7 to 16.6 mg/kg and from 8.2 to 16.9 mg/kg, respectively. Multivariate analysis of the data obtained showed the existence of significant differences in composition among cultivars. These differences were also significant when cultivars were grouped by year of production, showing that besides genetic factors, the vitamin E composition was influenced by environmental factors.

Authors+Show Affiliations

REQUIMTE, Serviços de Farmacognosia and Bromatologia, Faculdade de Farmácia, Universidade do Porto, Portugal.No affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Comparative Study
Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

15969535

Citation

Amaral, Joana S., et al. "Vitamin E Composition of Walnuts (Juglans Regia L.): a 3-year Comparative Study of Different Cultivars." Journal of Agricultural and Food Chemistry, vol. 53, no. 13, 2005, pp. 5467-72.
Amaral JS, Alves MR, Seabra RM, et al. Vitamin E composition of walnuts (Juglans regia L.): a 3-year comparative study of different cultivars. J Agric Food Chem. 2005;53(13):5467-72.
Amaral, J. S., Alves, M. R., Seabra, R. M., & Oliveira, B. P. (2005). Vitamin E composition of walnuts (Juglans regia L.): a 3-year comparative study of different cultivars. Journal of Agricultural and Food Chemistry, 53(13), 5467-72.
Amaral JS, et al. Vitamin E Composition of Walnuts (Juglans Regia L.): a 3-year Comparative Study of Different Cultivars. J Agric Food Chem. 2005 Jun 29;53(13):5467-72. PubMed PMID: 15969535.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Vitamin E composition of walnuts (Juglans regia L.): a 3-year comparative study of different cultivars. AU - Amaral,Joana S, AU - Alves,M Rui, AU - Seabra,Rosa M, AU - Oliveira,Beatriz P P, PY - 2005/6/23/pubmed PY - 2005/8/16/medline PY - 2005/6/23/entrez SP - 5467 EP - 72 JF - Journal of agricultural and food chemistry JO - J. Agric. Food Chem. VL - 53 IS - 13 N2 - The tocopherol and tocotrienol composition of walnuts (Juglans regia L.) was determined for nine cultivars (cvs. Arco, Franquette, Hartley, Lara, Marbot, Mayette, Mellanaise, Parisienne, and Rego). Walnuts were harvested over three consecutive years from two different geographical origins (Bragança and Coimbra, Portugal), for a total of 26 samples. The methodology employed was a normal-phase high-performance liquid chromatography coupled to a series arrangement of a diode array detector followed by a fluorescence detector, allowing the simultaneous analysis of all tocopherols and tocotrienols. The analyses showed that all samples presented a similar qualitative profile composed of five compounds: alpha-tocopherol, beta-tocopherol, gamma-tocopherol, delta-tocopherol, and gamma-tocotrienol. gamma-Tocopherol was the major compound in all samples, ranging from 172.6 to 262.0 mg/kg, followed by alpha- and delta-tocopherols, ranging from 8.7 to 16.6 mg/kg and from 8.2 to 16.9 mg/kg, respectively. Multivariate analysis of the data obtained showed the existence of significant differences in composition among cultivars. These differences were also significant when cultivars were grouped by year of production, showing that besides genetic factors, the vitamin E composition was influenced by environmental factors. SN - 0021-8561 UR - https://www.unboundmedicine.com/medline/citation/15969535/Vitamin_E_composition_of_walnuts__Juglans_regia_L__:_a_3_year_comparative_study_of_different_cultivars_ L2 - https://dx.doi.org/10.1021/jf050342u DB - PRIME DP - Unbound Medicine ER -