Do Cultivar, Geographical Location and Crop Season Influence Phenolic Profile of Walnut Leaves?

Molecules

Joana S. Amaral¹  Patrໜia Valentão¹  Paula B. Andrade¹  Rui C. Martins² 

[1] REQUIMTE, Serviço de Farmacognosia, Faculdade de Farmácia, Universidade do Porto, R. Aníbal Cunha, 164, 4099-030 Porto, Portugal; E-mails:;Centre for Biological Engineering, University of Minho, Campus of Gualtar, 4710-057 Braga, Portugal; E-mail:

关键词: Walnut leaves;    Juglans regia L.;    phenolic compounds;    flavonoids;    HPLC-DAD;    multivariate analysis;   

DOI  :  10.3390/molecules13061321

来源: mdpi

【 摘 要 】

Walnut leaves from nine different cultivars (Arco, Franquette, Hartley, Lara, Marbot, Mayette, Meylannaise, Parisienne and Rego) were studied for their phenolic compounds. Samples were harvested along three consecutive years, at two different geographical locations, in order to evaluate if significant differences in the phenolics composition can be related with genetic, climatic or geographical factors. Nine compounds (3-caffeoylquinic, 3-p-coumaroylquinic and 4-p-coumaroylquinic acids, quercetin 3-galactoside, quercetin 3-arabinoside, quercetin 3-xyloside, quercetin 3-rhamnoside, a quercetin 3-pentoside derivative and a kaempferol 3-pentoside derivative) were quantified using an HPLC-DAD methodology. The qualitative profiles were identical for all samples, but differences were observed in terms of individual compounds’ contents. Multivariate statistical analysis was carried out, showing that significant differences exist among production years, which can be related to climatic reasons.

【 授权许可】

CC BY   
© 2008 by the authors; licensee Molecular Diversity Preservation International, Basel, Switzerland.