Abstract:Early embryogenesis in angiosperms is an important developmental stage of sexual reproductive process.At this stage,the basic morphology of seedling is established,including apical basal axial polarity,different cell layers differentiation,and meristem formation.Zygote polarity directly affects the cell fates of apical and basal cell,but the underlying mechanism is still unknown.Previous studies suggested that WOX family transcription factors,direct auxin transportation as well as auxin response may be involved in the establishment of apical basal patterning.Cell cell communication may mediate the radial patterning.Additionally,auxin flow participates in the process of apical organization.This paper will review the late research progresses on early embryogenesis of angiosperms,including zygote polarity and elongation,zygote division and apical and basal cell formation,hypophysis specification and root pole formation,radial patterning and protoderm specification,shoot meristem specification and cotyledon initiation.