Raspberry cultivar evaluation according to their fruit quality and antioxidant capacities
2014
Andrianjaka-Camps, Z.N. | Kuttnig, S. | Ançay, A. | Arrigoni, E. | Baumgartner, D. | Carlen, C.
The interest of consumers in health related compounds in fruits is increasing. This obliges raspberry producers to supply the market not only with attractive fruits but also fruits rich in bioactive compounds. The aim of this study was to evaluate 8 floricane fruiting cultivars/genotypes in terms of taste and health related compounds, as well as antioxidant activity of the fruits and the leaves. The fruit parameters measured were color, firmness, soluble solids and acid content as well as the following health related compounds: vitamin C, total phenolics and anthocyanins. For the potential antioxidant capacities, DPPH radical scavenging capacity, Ferric Reducing Antioxidant Power (FRAP) and Oxygen Radical Absorption Capacity (ORAC) assays were performed. Phenol content, FRAP and ORAC of the leaves were also measured. The results showed that the influence of the genotypes is high for all the measured fruit parameters, especially for the health related compounds and the antioxidant capacities. The difference in anthocyanin and phenolic contents between the cultivars was high with about 35 and 64% respectively. The antioxidant activities were more related to the phenolic content than to the other bioactive compounds measured. Cultivars producing fruits with good physical quality parameters have generally relatively poor antioxidant activities and lower amounts of bioactive compounds. No relation was found between parameters measured in leaves and fruits. Finally, the adaptability of the different cultivars to meet consumer demands is discussed.
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