Dormancy period of pawpaw (Asimina triloba (L.) Dunal) trees in Miyazaki Prefecture, Japan

摘要

Pawpaw is a small, deciduous fruit tree species in the family Annonaceae that is native to eastern North America. Among the members of the family Annonaceae, only the genus Asimina is found in the temperate zone. Temperate fruit tree species enter a dormant state during the winter. This endogenous dormancy breaks after exposure to low temperatures for a specific period of time. Since the dormancy period of Pawpaw in southern Kyushu of japan is unknown, we collected Pawpaw branches over time and estimated the dormancy period using a stem cutting method.