Do cultivar, geographical location and crop season influence phenolic profile of walnut leaves?

• Type: Article in International Scientific Journal
• Date: 2008

Authors

Joana S Amaral (Author) Other; Patricia Valentao (Author) FFUP; Paula B Andrade (Author) FFUP; Rui C Martins (Author) Other; Rosa M Seabra (Author) Other

Journal

Title: Molecules

Vol. 13

Pages: 1321-1332

ISSN: 1420-3049

Publisher: MDPI

Indexing

ISI Web of Knowledge - 27 Citations

ISI Web of Science

Scopus - 32 Citations

Scientific classification

FOS: Natural sciences > Chemical sciences

CORDIS: Health sciences

Other information

Authenticus ID: P-003-Z4E

DOI: 10.3390/molecules13061321

Resumo (PT): 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. <br> <br> Keywords: Walnut leaves; Juglans regia L.; phenolic compounds; flavonoids; HPLCDAD; multivariate analysis <br> <a target="_blank" href="http://www.mdpi.com/1420-3049/13/6/1321"> Texto integral </a> <br> <br>

Abstract (EN): 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.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 12