Diferencias en los espectros polínicos de las mieles monoflorales de eucalipto del noroeste de la Península Ibérica en función de su procedencia biogeográfica

Abstract

We have carried out the palynological study of thirty-one Eucalyptus honey samples from Galaico-Portugués and Galaico-Asturiano biogeographical sectors, of Eurosiberian region (Iberian Peninsula). Eucalyptus pollen has an average value of 75%. Pollen spectra of honeys are similar for samples from each biogeographic origin. However, qualitative differences were found in the frequency and percentage of representation of some important and accompanying pollen types. Honeys from Galaico-Portugués sector, have Cytisus t. and Crataegus monogyna t. as accompanying pollen grains, while in honeys from Galaico- Asturiano sector, Castanea sativa and Rubus have been identified as accompanying pollen. Furthermore, it is noticeable, the greater representation of Lithodora, Cruciferae (Brassica and Raphanus), Acacia, Actinidia deliciosa, Pinus and Conium maculatum t. in honeys from Atlantic coast, against Centaurea, several Ericaceae (mainly E. arborea and E. cinerea t.) and Plantago, in honeys from Cantabrian coast. Otherwise, no interest differences have been found in pollen content of the honeys studied.