Dispersión del polen en Araucaria angustifolia (Bert.) O. Kuntze

Abstract

With the aim to know pollen dispersal of Araucaria angustifolia (Bert.) O. Kuntze from a cluster of "parana pine" orchards, through a NE-SW transect of 40 km, following the dominant winds direction during the last bloom, five samples by "fluxage" Cour method were obteined. Results have demonstred that Araucaria pollen have a very scarce capacity for long distances transport. This is in accordance with some structural and morphological pollen characters as big size, exineless structure and citoplams volume, which have not optimal transport conditions. More studies of Araucaria pollination are necesary in order to establish the constancy of these results and the incidence on it of the annual climatic variations.