Intermediate Epicotyl Physiological Dormancy in the Recalcitrant Seed of Quercus chungii F.P.Metcalf with the Elongated Cotyledonary Petiole

Control of seed germination and dormancy is important in plant adaptation evolution. When studying Quercus species, we observed a substantially delayed shoot emergence following fast root chungii F.P.Metcalf. Since epicotyl physiological (PD) has not been reported section Cyclobalanopsis, examined morphology Q. aimed to document PD the seeds. The embryo was fully developed fresh ripe elongating cotyledonary petiole pushed axis out during germination, which differed from observations other species. Shoots emerged seeds with developing roots after 3 months warm stratification (35/25 °C), reaching highest percentage 5 months. Seeds were recalcitrant displayed yet unreported type, for propose formula Cnd(root) ‒ Cp’’ 2b(shoot). Early development system appears be mechanism maintain constant water supply plumule emergence. Our documentation will provide guidance conservation restoration this species