What is meant by Hypogeal germination?
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.
What is the germination theory?
Germination is usually the growth of a plant contained within a seed; it results in the formation of the seedling. It is also the process of reactivation of metabolic machinery of the seed resulting in the emergence of radicle and plumule.
What is viviparous germination give example?
A viviparous plant is that plant where the seeds that are produced by the plant start germinating while on the parent’s body. They start germinating even before they get detached to the parent’s body. Mangroves that belong to rhizophora species are an example of this type of germination.
What are the steps in the process of germination?
The Seed Germination Process :
- Imbibition: water fills the seed.
- The water activates enzymes that begin the plant’s growth.
- The seed grows a root to access water underground.
- The seed grows shoots that grow towards the sun.
- The shoots grow leaves and begin photmorphogenesis.
What is epigeal germination?
Epigeal germination implies that the cotyledons are pushed above ground. The hypocotyl elongates while the epicotyl remains the same in length. In this way, the hypocotyl pushes the cotyledon upward. Normally, the cotyledon itself contains very little nutrients in plants that show this kind of germination.
What is epigeal germination examples?
– Epigeal germination is the type where the cotyledons are above the soil surface as the hypocotyl elongates very rapidly. The epicotyl remains unchanged in length. – Examples of epigeal germination are cotton, sunflower, castor, and bean (or common bean).
Why is viviparous germination?
In plants, vivipary occurs when seeds or embryos begin to develop before they detach from the parent. Plants such as some Iridaceae and Agavoideae grow cormlets in the axils of their inflorescences. These fall and in favourable circumstances they have effectively a whole season’s start over fallen seeds.
Which plant consist of viviparous type seed germination?
mangroves
A plant that shows viviparous germination seeds are Rhizophora. Rhizophora collectively called true mangroves. They are a genus of tropical mangrove trees, which generally live in intertidal zones and exhibit a number of adaptations, including pneumatophores. Explore more such questions and answers at BYJU’S.