Germination is the process by which a seed develops into a new plant. There are two main types of germination: epigeal germination and hypogeal germination.
1. Epigeal germination: In epigeal germination, the cotyledons (seed leaves) emerge above the soil surface. The epicotyl, which is the embryonic shoot, elongates and carries the cotyledons above the ground. These cotyledons then expand and carry out photosynthesis to provide energy for the developing seedling. Examples of plants that exhibit epigeal germination include beans, sunflowers, and peas.
2. Hypogeal germination: In hypogeal germination, the cotyledons remain below the soil surface and do not emerge. Instead, the epicotyl elongates and forms the first green shoot of the plant. The cotyledons in this case serve as energy reserves and do not perform photosynthesis. Examples of plants that exhibit hypogeal germination include corn, peanuts, and onions.
Both types of germination result in the formation of a seedling, but they differ in the way the cotyledons are positioned relative to the soil surface.
assignment types of germination (epigeal and hypogeal)
1 answer