Temperature influence on differentiation and release of hazel pollen.

摘要: The aim of the present work was to identify classic phenological stages, and understand its relation catkin differentiation growth, consequences for start pollination. Phenological observations an aeropalynological survey on Corylus avellana, which is example economically allergologically interesting arboreal plant, were carried out during 1991-1992. comparison between different phases data, showed that pollen trap recorded hazel-pollen presence in atmosphere immediately after release from orchard. elongation late winter, chilling requirement has been fulfilled, could be used indicate beginning heat accumulation necessary