Leaves from Vitis vinifera L. represent the less studied and valorized wastes of grape crops and the winery industry. This study aims thus to perform for the first time a deepened assessment of the bioactive compounds in grapevine leaves. The detailed composition of main phytochemicals involved in the high antioxidant of grape leaves (2.20 g TE/100 g) was determined including carotenoids (lutein, β-carotene), tocopherols (α and ɣtocopherol), polyphenols (phenolics acids, flavonoids), and phytosterols (β-sitosterol). In particular, high levels of lutein (0.3–1.0 g/kg) and α-tocopherol (0.2–1.2 g/kg) were observed. Moreover, the evolution of bioactive compounds during 7 harvesting times from July to October was also studied showing that the content of phytochemicals fluctuates according to the development stage of grape leaves. Phytosterols for example reached their highest levels in leaves in the later stage of maturation (T6 – T7) with values around 169 ± 40 mg/kg.

Grapevine leaves (Vitis vinifera): Chemical characterization of bioactive compounds and antioxidant activity during leave development

Laura Alessandroni;Sauro Vittori;Giovanni Caprioli
2022-01-01

Abstract

Leaves from Vitis vinifera L. represent the less studied and valorized wastes of grape crops and the winery industry. This study aims thus to perform for the first time a deepened assessment of the bioactive compounds in grapevine leaves. The detailed composition of main phytochemicals involved in the high antioxidant of grape leaves (2.20 g TE/100 g) was determined including carotenoids (lutein, β-carotene), tocopherols (α and ɣtocopherol), polyphenols (phenolics acids, flavonoids), and phytosterols (β-sitosterol). In particular, high levels of lutein (0.3–1.0 g/kg) and α-tocopherol (0.2–1.2 g/kg) were observed. Moreover, the evolution of bioactive compounds during 7 harvesting times from July to October was also studied showing that the content of phytochemicals fluctuates according to the development stage of grape leaves. Phytosterols for example reached their highest levels in leaves in the later stage of maturation (T6 – T7) with values around 169 ± 40 mg/kg.
2022
262
File in questo prodotto:
File Dimensione Formato  
Grapevine leaves (Vitis vinifera).pdf

solo gestori di archivio

Tipologia: Versione Editoriale
Licenza: NON PUBBLICO - Accesso privato/ristretto
Dimensione 549.92 kB
Formato Adobe PDF
549.92 kB Adobe PDF   Visualizza/Apri   Richiedi una copia

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11581/466612
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 12
  • ???jsp.display-item.citation.isi??? 10
social impact