A seed consists of three main parts. These parts include the embryo, seed coat and cotyledon (endosperm). An embryo is the part of the seed in which the new plant develops. The seed coat is the outer covering of a seed. It is the main form of protection. The cotyledon or endosperm is the hard outer case of a seed which holds the embryo and gives the embryo food supply (Ohanesian, 2001).
Seed germination is the resumption of metabolic activity in a plant embryo
after a period of dormancy. Water and oxygen are taken through the seed coat
and the embryo begins to enlarge. The seed coat then breaks open and the
radicle emerges followed by the shoot which contains leaves and the stem (Stack,
2008). Yet, germination is not the same thing as plant growth. When a plant seed
is exposed to proper conditions germination occurs. The proper conditions for
seed germination include the right amount of water, oxygen and a proper
temperature. There are other factors that affect seed germination. They include
light, the depth at which you plant your seed, and pH levels (Stack, 2008). Based
on the research I have conducted I have learned that you will be able to
recognize a germinating seed when the radicle has emerged. This may take
between 24-48 hours to occur.