Types Of asexual reproduction
Vegetative Propagation- When vegetative parts give rise to new plants, this type of reproduction is called as vegetative propagation.
- If a branch of a plant is cut with a node and watered every day, roots and new leaves come out. Nodes are the parts of the stem or branch at which a leaf arises.
- Flower buds and vegetative buds having short stems around which immature overlapping can give rise to a new plant. The buds which are present in the point of attachment of the leaf at the nodes are called vegetative buds.
- Scars present in potato called as eyes can give rise to new organisms.
Fig. Eyes in potato
- Bryophyllum can give rise to new plant from the buds present in the margin of leaves.
- Sweet potato and dahlia can give rise to new plants from roots.
- In cactus, new plants are produced when the parts of the plant get detached from the main plant body and each part can give rise to a new organism.
- In unicellular organisms small bulb like projections called buds come out from the body of organisms.
- The bud grows like a chain and detaches from the parent body to form a new organism.
- The new detached cell grows and matures and becomes a new organism.
- The organisms break down into many fragments.
- The fragments grow into a new organism.
- Example -Spirogyra, a slimy green alga.
Fig. Fragmentation in spirogyra
- Spores are special asexual reproductive structures covered by a hard protective coat.
- Spores can withstand unfavorable conditions such as high temperature with the help of protective coat.
- Spores can germinate under favorable conditions and can develop into a new individual.
- Spores can float in the air and cover long distance.
- Example- Moss and ferns.
Fig. Mosses , ferns