Flowering Plants: Early Growth and Development - 1Following the double fertilization in the flowering plants, the zygote develops into theembryo, the endosperm nucleus into the endosperm tissue, the embryo sac wall andinteguments of the ovule into the seed coat and the ovary and accessory tissue intothe fruit. In this section we will discuss the development of the embryo, seed andfruit maturation, dispersal and germination.Embryo Development•The first division of the zygote produces a small proembryo cell and a largerbasal cell that develops the stalked suspensor, which elevates the developingproembryo into the endosperm tissue.Zygote (within the embryo sac)|First Division| ||Upper cellLower cellProembryo Basal cell of the Suspensor||Mass of cellsSuspensor Stalk(surrounded by endosperm)Suspends embryo into endosperm|Proembryo, divided into 3 layersProtoderm ---> Surface TissuesProcambium ---> Vascular TissuesGround Meristem ---> Ground Tissues|The embryo takes on the shape of an axis with meristems at both ends.
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