Contribution of anthocyanins to the antioxidant capacity of juvenile and senescing sugar maple (Acer saccharum) leaves

Functional Plant Biology : FPB
Abby K van den Berg, Timothy D Perkins

Abstract

Foliar anthocyanins are hypothesised to provide an additional source of photoprotection from photooxidative stress to the leaves in which they occur through their ability to scavenge excess free radical species. Although demonstrated to significantly enhance the antioxidant status of red morphs of fully expanded leaves of some species, the contribution of anthocyanins to the antioxidant capacity of the juvenile and senescing leaves in which they frequently occur has not been examined. Antioxidant activity of extracts from anthocyanic and non-anthocyanic juvenile and senescing sugar maple (Acer saccharum Marsh.) leaves from similar light environments was assessed using the stable free radical 1,1-diphenyl-2-picryl hydrazyl (DPPH). Anthocyanin content was significantly correlated with antioxidant activity in extracts of anthocyanic juvenile leaves but only weakly correlated in extracts of anthocyanic senescing leaves. In addition, the antioxidant activity of anthocyanic and non-anthocyanic leaves was equal in both juvenile and senescing leaves. Thus, although anthocyanins may contribute to the antioxidant capacity of anthocyanic juvenile and senescing sugar maple leaves, these results are not consistent with the hypothesis that a...Continue Reading

References

Jan 1, 1996·Free Radical Biology & Medicine·C A Rice-EvansG Paganga
Oct 3, 2002·Journal of Agricultural and Food Chemistry·Florian C StintzingRonald E Wrolstad
Dec 24, 2003·Journal of Agricultural and Food Chemistry·Ock Kyoung ChunChang Yong Lee
May 12, 2005·Journal of Agricultural and Food Chemistry·Ronald L PriorKaren Schaich
Jan 1, 2002·Functional Plant Biology : FPB·Samuel O NeillKenneth R Markham

❮ Previous
Next ❯

Related Concepts

Related Feeds

Cancer Epigenetics and Senescence (Keystone)

Epigenetic changes are present and dysregulated in many cancers, including DNA methylation, non-coding RNA segments and post-translational protein modifications. The epigenetic changes may be involved in regulating senescence in cancer cells. This feed captures the latest research on cancer epigenetics and senescence.