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  2. Stigma (botany) - Wikipedia

    en.wikipedia.org/wiki/Stigma_(botany)

    Stigma have been shown to assist in the rehydration of pollen and in promoting germination of the pollen tube. [5] Stigma also ensure proper adhesion of the correct species of pollen. Stigma can play an active role in pollen discrimination and some self-incompatibility reactions , that reject pollen from the same or genetically similar plants ...

  3. Pollen - Wikipedia

    en.wikipedia.org/wiki/Pollen

    Pollen in plants is used for transferring haploid male genetic material from the anther of a single flower to the stigma of another in cross-pollination. [2] In a case of self-pollination, this process takes place from the anther of a flower to the stigma of the same flower. [2] Pollen is infrequently used as food and food supplement. Because ...

  4. Fruit tree pollination - Wikipedia

    en.wikipedia.org/wiki/Fruit_tree_pollination

    A fully developed fruit may contain 1,000 seeds so well over 1,000 grains of pollen must be received by a receptive stigma. An exact list of actors involved in natural papaya pollination does not exist. Large insects play an important role in most regions with hawkmoths, sphinx moths and possibly hummingbirds as primary pollinators.

  5. Xenogamy - Wikipedia

    en.wikipedia.org/wiki/Xenogamy

    Dichogamy: Pollen and stigma of the flower mature at different times to avoid self-pollination. Self-incompatibility: In same plants, the mature pollen fall on the receptive stigma of the same flower but fail to bring about self-pollination. Male sterility: The pollen grains of some plants are not functional. Such plants set seeds only after ...

  6. Pollination - Wikipedia

    en.wikipedia.org/wiki/Pollination

    Heavy rain discourages insect pollination and damages unprotected flowers, but can itself disperse pollen of suitably adapted plants, such as Ranunculus flammula, Narthecium ossifragum, and Caltha palustris. [42] In these plants, excess rain drains allowing the floating pollen to come in contact with the stigma. [42]

  7. Pollinator - Wikipedia

    en.wikipedia.org/wiki/Pollinator

    The bee collects the pollen by rubbing against the anthers. The pollen collects on the hind legs, in a structure referred to as a "pollen basket". As the bee flies from flower to flower, some of the pollen grains are transferred onto the stigma of other flowers. Nectar provides the energy for bee nutrition; pollen provides the protein.

  8. List of pollen sources - Wikipedia

    en.wikipedia.org/wiki/List_of_pollen_sources

    The plants listed below are plants that would grow in USDA Hardiness zone 5. A good predictor for when a plant will bloom and produce pollen is a calculation of the growing degree days. The color of pollen below indicates the color as it appears when the pollen arrives at the beehive.

  9. Glossary of plant morphology - Wikipedia

    en.wikipedia.org/wiki/Glossary_of_plant_morphology

    In angiosperms the ovule is enclosed in the carpel, requiring a specialised structure, the stigma, to receive the pollen. On the surface of the stigma, the pollen germinates; that is, the male gametophyte penetrates the pollen wall into the stigma, and a pollen tube, an extension of the pollen grain, extends towards the carpel, carrying with it ...