Vegetative propagation

from Wikipedia, the free encyclopedia

The vegetative propagation is a form of asexual reproduction of plants and lower animal organisms , especially protozoa . Like growth and regeneration processes , it is based exclusively on mitotic cell division . The daughter generation therefore does not differ in its genetic material from the mother generation; she is a clone . The vegetative propagation occurs in the nature of, but also in plant breeding for artificial propagation of plants by seed potatoes used. The opposite of vegetative reproduction is generative reproduction , which is known as sexual reproduction and spread as seeds .

An example of vegetative reproduction: The fountain liver moss ( Marchantia polymorpha ) forms small "breeding cups" on the upper side of the leaf, in which there are already small, independent plants as vegetative offspring

Since the genetic material (apart from mutations ) remains unchanged during vegetative reproduction , hardly any adaptation to changing environmental influences can take place. This mainly happens through generative reproduction (sexual reproduction of the plants), in which the genetic material is recombined. This “new combination” represents the potential for adaptation. Plants use vegetative and generative reproduction as a rule at different times of ontogenesis , depending on their genetics and external living conditions. Bacteria exchange their genetic material under certain conditions, which means that they mainly pass on resistance genes .

Forms of vegetative reproduction

Auto-vegetative propagation

Xenovegetative reproduction

Xenovegetative propagation ( Greek ξένος xénos "foreign") is vegetative propagation with the aid of outside.

See also

Web links

Individual evidence