实验十一 胚及胚乳的发育和果实的结构与类型（Experiment eleven the development of embryo and endosperm and the structure and type of fruit）.docVIP

实验十一 胚及胚乳的发育和果实的结构与类型（Experiment eleven the development of embryo and endosperm and the structure and type of fruit） Experiment eleven the development of embryo and endosperm and the structure and type of fruit The cells of a plant produce fertilized eggs after fertilization. After resting for a period of time, the zygote begins to divide and form the embryo of two cells, the larger cell at the end of which is the basal cell, and the smaller end of the cell is the apical cell. The apical cells develop further, and they develop into mature embryos at the stage of globular embryo, heart-shaped embryo and torpedo embryo stage. The basal cell participates in or does not participate in the development of the embryo. At the same time, the polar nuclei formed by polar fertilization develop into endosperm. The embryo and endosperm constitute two important parts of the seed. The fruit of the plant is formed by the expansion and development of the ovary of the pistil after fertilization, in which the ovary wall develops into a pericarp, and ovule develops into seed. The ovary is a natural, and the outside part of the ovary and ovary develops into the fruit for anthocarp by a flower formation of fruit fruit, flowers by multiple distinct pistil development fruit formed for aggregate fruit from inflorescence development and the fruit for fruit. In addition, according to the morphology of mature pericarp (whether fleshy, cracking, maturity whether winged etc.), ovary and placenta structure type, can be divided into different types of fruit. - First, the purpose of the experiment 1. grasp the basic process of Capsella embryo and endosperm development, the main structure of embryo, endosperm and seed in several major periods. 2. based on mastering basic structure of fruit and the common fruit type, fruit, and pseudocarps, understand the natural aggregate fruit and the concept of fruits and seeds to adapt to different modes of communication. Two, key and difficult Key: the basic pro