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Antioxidant capacity and phenolic content of spinach as affected by genetics and maturation.
J Agric Food Chem. 2005 Nov 02; 53(22):8618-23.JA

Abstract

Spinach leaves harvested at three maturity stages from eight commercial cultivars (CC) and eight advanced breeding lines (ABL) were evaluated for oxygen radical absorbing capacity (ORAC), total phenolics, and flavonoid composition and content. ABL had higher levels of total phenolics, total flavonoids, and ORAC than CC. Midmaturity spinach leaves had higher levels of total phenolics, total flavonoids, and antioxidant capacity than immature and mature leaves. The contents of individual flavonoids varied in response to maturation, with the predominant glucuronated flavones decreasing and patuletin and spinacetin derivatives increasing. Both total phenolics and total flavonoids correlated well with ORAC (r(xy)() = 0.78 and 0.81, respectively) demonstrating that flavonoids were major contributors to antioxidant capacity. Our results indicate that spinach genotypes should be harvested at the midmaturity stage for consumers to benefit from elevated levels of health promoting flavonoids present in the leaves. Additionally, plant breeders can select for increased phenolic content to increase antioxidant capacity of spinach genotypes.

Authors+Show Affiliations

Food Science and Horticulture Departments, University of Arkansas, Fayetteville, AR 72704, USA.No affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article
Research Support, U.S. Gov't, Non-P.H.S.

Language

eng

PubMed ID

16248562

Citation

Pandjaitan, N, et al. "Antioxidant Capacity and Phenolic Content of Spinach as Affected By Genetics and Maturation." Journal of Agricultural and Food Chemistry, vol. 53, no. 22, 2005, pp. 8618-23.
Pandjaitan N, Howard LR, Morelock T, et al. Antioxidant capacity and phenolic content of spinach as affected by genetics and maturation. J Agric Food Chem. 2005;53(22):8618-23.
Pandjaitan, N., Howard, L. R., Morelock, T., & Gil, M. I. (2005). Antioxidant capacity and phenolic content of spinach as affected by genetics and maturation. Journal of Agricultural and Food Chemistry, 53(22), 8618-23.
Pandjaitan N, et al. Antioxidant Capacity and Phenolic Content of Spinach as Affected By Genetics and Maturation. J Agric Food Chem. 2005 Nov 2;53(22):8618-23. PubMed PMID: 16248562.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Antioxidant capacity and phenolic content of spinach as affected by genetics and maturation. AU - Pandjaitan,N, AU - Howard,L R, AU - Morelock,T, AU - Gil,M I, PY - 2005/10/27/pubmed PY - 2005/12/24/medline PY - 2005/10/27/entrez SP - 8618 EP - 23 JF - Journal of agricultural and food chemistry JO - J Agric Food Chem VL - 53 IS - 22 N2 - Spinach leaves harvested at three maturity stages from eight commercial cultivars (CC) and eight advanced breeding lines (ABL) were evaluated for oxygen radical absorbing capacity (ORAC), total phenolics, and flavonoid composition and content. ABL had higher levels of total phenolics, total flavonoids, and ORAC than CC. Midmaturity spinach leaves had higher levels of total phenolics, total flavonoids, and antioxidant capacity than immature and mature leaves. The contents of individual flavonoids varied in response to maturation, with the predominant glucuronated flavones decreasing and patuletin and spinacetin derivatives increasing. Both total phenolics and total flavonoids correlated well with ORAC (r(xy)() = 0.78 and 0.81, respectively) demonstrating that flavonoids were major contributors to antioxidant capacity. Our results indicate that spinach genotypes should be harvested at the midmaturity stage for consumers to benefit from elevated levels of health promoting flavonoids present in the leaves. Additionally, plant breeders can select for increased phenolic content to increase antioxidant capacity of spinach genotypes. SN - 0021-8561 UR - https://www.unboundmedicine.com/medline/citation/16248562/Antioxidant_capacity_and_phenolic_content_of_spinach_as_affected_by_genetics_and_maturation_ L2 - https://doi.org/10.1021/jf052077i DB - PRIME DP - Unbound Medicine ER -