Geitonogamy
Encyclopedia
Geitonogamy is the pollination
of a flower
with the pollen
from another flower on the same flowering plant
. In animal pollinated systems this is accomplished by a pollinator visiting multiple flowers on the same plant. Geitonagamy is also possible within species that are wind-pollinated
, and may actually be quite widespread in self-compatible species. Transfer of pollen grains from anther to the stigma of another flower of the same plant. Although geitnogamy is functionally cross-pollination involving a pollinating agent, genetically it is similar to autogamy since the pollen grains come from the same plant.
Monoecious plants like maize and caster show geitonogamy. Geitonogamy is not possible for strictly dioecious plants.
Pollination
Pollination is the process by which pollen is transferred in plants, thereby enabling fertilisation and sexual reproduction. Pollen grains transport the male gametes to where the female gamete are contained within the carpel; in gymnosperms the pollen is directly applied to the ovule itself...
of a flower
Flower
A flower, sometimes known as a bloom or blossom, is the reproductive structure found in flowering plants . The biological function of a flower is to effect reproduction, usually by providing a mechanism for the union of sperm with eggs...
with the pollen
Pollen
Pollen is a fine to coarse powder containing the microgametophytes of seed plants, which produce the male gametes . Pollen grains have a hard coat that protects the sperm cells during the process of their movement from the stamens to the pistil of flowering plants or from the male cone to the...
from another flower on the same flowering plant
Flowering plant
The flowering plants , also known as Angiospermae or Magnoliophyta, are the most diverse group of land plants. Angiosperms are seed-producing plants like the gymnosperms and can be distinguished from the gymnosperms by a series of synapomorphies...
. In animal pollinated systems this is accomplished by a pollinator visiting multiple flowers on the same plant. Geitonagamy is also possible within species that are wind-pollinated
Anemophily
Anemophily or wind pollination is a form of pollination whereby pollen is distributed by wind. Anemophilous plants may be either gymnosperms or angiosperms ....
, and may actually be quite widespread in self-compatible species. Transfer of pollen grains from anther to the stigma of another flower of the same plant. Although geitnogamy is functionally cross-pollination involving a pollinating agent, genetically it is similar to autogamy since the pollen grains come from the same plant.
Monoecious plants like maize and caster show geitonogamy. Geitonogamy is not possible for strictly dioecious plants.