Publication Date:
2010
Short description:
Vanadate reduction by caffeic acid: a mechanism of biological importance / Deiana, Salvatore Andrea; Lauro, G; Silvetti, Margherita; Castaldi, Paola. - 1:(2010), pp. 108-109. (Intervento presentato al convegno XXVth International Conference on Polyphenols tenutosi a Montpellier, Le Corum nel 24-27 August, 2010).
abstract:
In the apoplasm, the toxicity of V(V) and V(IV) can be limited through redox and complexation reactions involving phenolic substances and polyuronic components. In such a context, we report about the reducing activity of caffeic acid (CAF) towards V(V) and the role of polygalacturonic acid (PGA) on this redox reaction. The results show that the reaction, particularly fast in the 2.0-3.0 pH range, leads to the formation of oxidation products of caffeic acid, also active in the reduction of V(V). The redox reaction is faster in presence of polygalacturonic acid that acts as a complexing agent of V(IV) ions in the whole pH range (2.5-6.0) investigated.
Iris type:
4.1 Contributo in Atti di convegno
List of contributors:
Deiana, Salvatore Andrea; Lauro, G; Silvetti, Margherita; Castaldi, Paola
Book title:
XXVth International Conference on Polyphenols