What is Seed? What is Seedling? Totally Seed Technology Information added in this slide

2.  Product of ripened ovule, after fertilization by pollen and
some growth within the mother plant.
◦ Embryo develops from zygote (fertilized ovum)
◦ Seed coat develops from integuments of the Ovule
◦

3.  Enclosed seeds:
1. Produced in Angiosperms
2. produced in a hard or fleshy structure
called a fruit
3. Some fruits have layers of both hard
and fleshy material

4.  Naked seeds:
1. In gymnosperms
2. No special structure develops to enclose the
seeds
3. Begin their development on the bracts of
cones
4. Seeds do become covered by the cone
scales in some species of conifer.

5.  Embryo:
1. Fertilized ovule
2. An immature plant from which a new
plant will grow under proper conditions
3. Monocot: one cotyledon or seed
4. Dicot: Two cotyledons in almost all di-cotyledons
and two or more in gymnosperm

8.  Seed coat:
1. Develops from maternal tissue
2. Helps protect the embryo
3. In mature seed
1. can be a paper-thin layer (e.g. peanut) or
2. something more substantial (e.g. coconut), or
3. Fleshy as in the sarcotesta of pomegranate

9.  Determine the potential level of activity and
performance of the seed or seed lot
during germination and seedling emergence

10. After One Month:
1. Shoot dry weight
2. Root weight for seedling vigor calculation
3. Seedling height,
4. Leaf expansion rate,
5. Relative growth rate ,
6. Vigor scores-to evaluate seedling vigor

11.  Harvesting; just after physiological maturity
 Handling
 Storing seed to minimize damage