This document discusses the development of embryos in plants. It defines an embryo as a fertilized zygote or oospore that develops. There are 5 types of embryo development in angiosperms based on the role of the proembryo cells: 1) Crucifer type where the basal cell plays little role, 2) Asterad type where the basal and terminal cells are important, 3) Solanad type where the basal cell forms a suspensor, 4) Caryophyllod type where the basal cell divides, and 5) Chenopodiad type where both cells participate. It also describes the detailed development of embryos in Capsella bursa-pastoris and Luzula.

1. Presented By
Dr. V. RAMSEH,
Assistant Professor & Head i/c
Department of Botany
Vivekananda College
Tiruvedakam West – 625 234
ramesh.vnr09@gmail.com
+91 9842629245
DEVELOPMENT OF EMBRYO
IN PLANTS

2. What is Embryo?
• Fertilized Zygote or Oospores developed into
Embryo

3. DEVELOPMENT OF EMBRYO
Based on the mode of origin of proembryo 5 Types in Angiosperms
1. Crucifer type
Basal cell plays little or no role
2. Asterad type
Basal and terminal cells play an important role
The terminal cell of the 2-celled proembryo divides by a transverse wall
Basal cell plays a little or no role in the development of the embryo.
3. Solanad type
Basal cells usually forms a suspensor cells
4. Caryophyllod type
Basal cell does division
5. Chenopodiad type
Both basal and terminal cells take part in the development of the embryo.

4. DEVELOPMENT OF DICOT EMBRYO – CAPSELLA
Hanstein (1870) worked out the details of the development of embryo in Capsella
bursa- pastoris, a member of Crucifeae.

6. Developmet of Dicot Embryo

7. DEVELOPMENT OF MONOCOT EMBRYO – LUZULA

8. THANK YOU