Dictionary > Self pollination

Self pollination

Definition
noun
(botany) A type of pollination in which the pollen from the anther of the flower is transferred to the stigma of the same flower
Supplement
In flowering plants, fertilization occurs through pollination, i.e. the transfer of pollen from the anther to the stigma of a plant. The pollen contains the male gametes (sperm cells) that are transferred into the female gametophyte (i.e. ovules of flowering plants and the cones of coniferous plants) via the pollen tube. In regard to pollination, the ovum may be fertilized either by cross-pollination or by self-pollination.
Self-pollination refers to a type of pollination wherein the pollen from the anther is transferred to the stigma of a single flower. Flowers that carry out self-pollination are hermaphrodite. A hermaphrodite flower is one in which both the stamen and the carpel are present. The stamen is the reproductive organ of the flower that produces the pollen whereas the carpel is that part of the flower producing the ovule. Self-pollination is common in many plants species. It confers the advantage of having a rather stable genotype and the benefit of not being dependent on pollinating agents. Nevertheless, there are also important disadvantages of self-pollination over cross-pollination. One disadvantage is its promoting of inbreeding depression, i.e. when the biological fitness in a given population is reduced as a result of inbreeding. In cross-pollination, there is more genetic diversity. The more diverse the genes or alleles in the gene pool, the better they are protected against extinction.
Compare:

See also:

  • fertilization
  • pollination
  • allogamy


  • You will also like...

    Genetic Mutations
    Chromosome Mutations – II

    This tutorial is a continuation of the first lesson on chromosomal mutation. Here, find out the chromosomal aberrations ..

    Still freshwater and plants
    Still Freshwater & Plants

    Plants in lentic habitats have features not found in terrestrial plants. They acquired these features as they adapt to t..

    Freshwater Ecology
    Freshwater Ecology

    Freshwater ecology focuses on the relations of aquatic organisms to their freshwater habitats. There are two forms of co..

    Ploidy
    Polyploidy

    Humans are diploid creatures. This means that for every chromosome in the body, there is another one to match it. Howeve..

    Homeostasis by water regulation
    Homeostasis of Organism Water Regulation

    Osmoregulation is the regulation of water concentrations in the bloodstream, effectively controlling the amount of water..

    Thermographic image of face and neck
    Regulation of Organic Metabolism, Growth and Energy Balance

    The human body is capable of regulating growth and energy balance through various feedback mechanisms. Get to know the e..

    Related Articles...

    No related articles found

    See all Related Topics