Embryogenesis in Plants
Introduction
Plant Embryogenesis is the process by which plant embryos form and develop. The
Zygote produced after fertilization must undergo various cellular divisions and
differentiation to become a mature embryo. Or Embryogenesis is the process of
formation and development of an embryo from the zygote after fertilization. In
๏ฌowering plants, it begins inside the ovule after syngamy and continues until a
mature embryo is formed within the seed.
The embryo later develops into a new plant during seed germination;
Process of Embryogenesis in Angiosperms
1. Formation of Zygote: ๏ฌrst stage of diploid life stort with fusion of haploid egg
and to form single celled zygote. Division at this stage give rise to small apical and
elongated basal cell.
โDuring double fertilization, one male gamete fuses with the egg cell.
โThis fusion is called syngamy.
โThe diploid cell formed is known as the zygote.
The zygote is the ๏ฌrst cell of the future embryo.
2. Resting Period of Zygote
โIn many plants, the zygote undergoes a short resting phase.
โDuring this time:
oEndosperm develops ๏ฌrst.
oFood materials accumulate.
โAfter this, the zygote starts dividing.
Development of Embryo
A. Early Embryo Development
First Division of Zygote
