Germination is the beginning of growth of a seed. There are two types of germination in dicots depending on whether the cotyledons are lifted above ground or remain below ground: epigeal and hypogeal

1. 022 TYPES OF SEED GERMINATION IN DICOTYLEDONS
Germination is the beginning of growth of a seed. There are two types of
germination in dicots depending on whether the cotyledons are lifted above
ground or remain below ground: epigeal and hypogeal
MATERIALS REQUIRED
Four paper cups / halves of empty coconut shells
Kidney beans/ Red beans
Pea seeds
Soil
Water
water
Kidney beans Peas
coconut Soil shells paper cups

2. Soak few bean seeds and peas in water overnight.
Take four paper cups or four halves of empty coconut shells. Make a small
hole at the bottom of the cups. Alternatively while using the coconut shells,
of the three eyes (round indentations), drill the soft eye. Fill them with soil.
Put 2 pre- soaked kidney beans in two paper cups/coconut shells and put 2
pre- soaked peas in the remaining two paper cups/coconut shells. Wet the
soil by sprinkling little water. The soil needs to be moistened everyday for
about 7-10 days. Observe the pattern of germination for both bean seeds
and the pea seeds

3. Cotyledons
Soil
Radicle Old seed coats
First leaves
KIDNEY BEANS: Epigeal germination
In kidney beans the cotyledons come above the soil surface into air and light,
due to rapid growth and elongation of the hypocotyl (hypocotyl is the stem
below the cotyledons). They are green and make food to be used by stem
during growth. Thus, the cotyledons function as leaves until the true leaves
emerge. These finally dry off and seedlings become independent. This type of
germination is termed as epigeal (epi = above) germination.

4. PEA: Hypogeal germination
Soil
Pea
In case of pea, the cotyledons remain in the soil. Here the epicotyl (stem above
the cotyledons) elongates and raises the plumule out of the soil upwards.
Cotyledons do not turn green instead stay below ground where eventually they
are used up. This type of germination is termed as hypogeal (hypo= below)
germination.