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Radicle and Plumule Differences in Biology Import Concepts Must to Know

Question. Differences Between Radicle and Plumule.

Answer:

The Radicle:

  • After germination, the first part of the embryo that grows from the seed is called the radicle. It is an embryonic root of the seedling and later grows on to become the root of the plant.
  • The radicle grows from the micropyle of the seed and develops further down into the soil. As it grows into the soil, it starts to absorb water from it for the growth and development of the embryo.
  • After the emergence of the radicle, the plumule comes out from the seed. It supports the cotyledons and performs photosynthesis, a process that produces food required by the plant for its growth.
  • There are two types of radicles: antitropous and synchronous.
  • They are different from each other because of the direction of their growth. When the radicle grows away from the hilum, it is known as Antitropous and when it grows towards the hilum, this type of radicle is known as synchronous.

The Plumule:

  • The primary shoot that comes out of the embryo in the seed is the plumule. This plumule later develops into the first leaves of the seedling and is found above the cotyledons during the germination process.
  • The growing tip of the tiny shoot called epicotyl is the part that is known as the plumule. Epicotyl develops into leaves, stems, and flowers as the plant grows.
  • The process of germination of the seed can be classified into two parts: epigeal germination and hypogeal germination. Epigeal germination is when the plumule appears after the cotyledons have grown above the ground.
  • Hypogeal germination occurs when the plumule grows above the soil while the cotyledons are below the surface of the soil.
  • Most of the plumules are conical in shape and as cotyledons start to store food, the plumule starts to become small.
  • Sometimes the seed stores less food and in such a scenario, the plumule becomes large and grows well-formed leaves. These leaves then capture more sunlight to perform photosynthesis.
Illustration: Radicle and Plumule Differences in Biology Import Concepts Must to Know
Table of Differences between Radicle and PlumuleTable of Differences between Radicle and Plumule
Differentiating PropertyRadiclePlumule
DefinitionThe radicle is the embryonic root of the plant.Plumule is the embryonic shoot of the plant.
ConsequenceRadicle comes out first from the seed.Plumule grows after the growth of radicle.
DevelopmentRadicle develops into the future root of the plant.Plumule develops into the future shoot, which is the stem and the leaves of the plant.
Growing TowardsRadicle grows downwards into the soil.Plumule grows upwards out of the soil.
ColorRadicle is more white than the plumule.Plumule is less white than the radicle.
FunctionRadicle is capable of absorbing water from the soil, which is required for the development of the embryonic plant.Plumule is capable of photosynthesizing in order to produce food for the growing embryonic plant.
Appearing From the SeedRadicle is the first part of the seedling.Plumule grows after the radicle.
PhototrophicRadicle is negatively phototrophic.Plumule is positively phototrophic.
HypertrophicRadicle is positively hydrotropic.Plumule is negatively hydrotropic.
GeostrophicRadicle is positively geotropic.Plumule is negatively geotropic.