Studies on Formation and Development of Embryo and Endosperm of Osmanthus fragrans

Observation on the formation and development of embryo and endosperm of Osmanthus fragrans with stone wax cutting method indicated that the embryo development of sweet Osmanthus was ongrad type. The fertilized egg usually underwent a rest period before embarking on its first division. And the first division of the zygote took place after the division of primary endosperm nucleus. After the club shaped, the globular embryo and the heart shaped embryo, the fish torpedo embryo developed when the fruit became ripe.From the late club shaped to early heart shaped embryo stage, the suspensor grew to its maximum length. The endosperm development of Osmanthus fragrans was cellular type. The endothelium differentiated from the inner epidermis of integument in the period of 2 nucleate embryo sac. The change of endothelium cell shape took place in the period of globular embryo and became the inner seed vessel ultimately.