a type if germination where cotyledon remain underground
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Answer:
Hypogeal germination implies that the cotyledons stay below the ground. The epicotyl (part of the stem above the cotyledon) grows, while the hypocotyl (part of the stem below the cotyledon) remains the same in length. In this way, the epicotyl pushes the plumule above the ground.
Explanation:
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Answer:
HYPOGEAL GERMINATION IN PEA SEED - DEFINITION.
The pea seed absorbs water through the micropyle and becomes turgid resulting in breaking of the testa.
This helps the radicle to come out and grow downward to form root.
The plumule grows in upward direction and forms the shoot system. In order to protect the young shoot the plumule is arched so that it can device its growth from the soil without injury.
The cotyledons provide food to the growing seedling and wither in the later stages of development.
The germination is hypogeal as the cotyledons remain underground.
HYPOGEAL TYPE OF GERMINATION IN MAIZE SEED - DEFINITION
The maize grain absorbs water and swells. The radical is covered with a protective sheath called coleorhiza. It breaks that open to emerge out.
The fruit wall grows downwards to form roots. Adventitious roots are developed from base of the stem.
The plumule break open the protective sheath coleoptile and grows upwards. The hypocotyl does not elongates making it a hypogeal type of germination.
DIFFERENCES BETWEEN EPIGEAL AND HYPOGEAL TYPE OF GERMINATION - DEFINITION
Epigeal type of germination
Hypogeal type of germination
Hypocotyl elongates and pushes the cotyledons above the ground.
Epicotyl elongates and cotyledons remain underground.
For example, bean.
For example, gram.