Pollen

Pollen is a fine to coarse powder containing the microgametophytes of seed plants, which produce the male gametes (sperm cells). 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 female cone of coniferous plants. When pollen lands on a compatible pistil or female cone (i.e., when pollination has occurred), it germinates and produces a pollen tube that transfers the sperm to the ovule (or female gametophyte). Individual pollen grains are small enough to require magnification to see detail. The study of pollen is called palynology and is highly useful in paleoecology, paleontology, archeology, and forensics.

Read more about PollenThe Structure and Formation of Pollen, Pollination, Pollen As A Carrier of Ecological Information in Plants, Pollen in The Fossil Record, Hay Fever, Nutrition, Forensic Palynology

Other articles related to "pollen":

Caytoniales
... The pollen grains are winged, like those of gymnosperms, and the pollen is bisaccate like the pollen of pine trees ...
Pollen - Forensic Palynology
... In forensic biology, pollen can tell a lot about where a person or object has been, because regions of the world, or even more particular locations such a ... Pollen evidence can also reveal the season in which a particular object picked up the pollen ... Pollen has been used to trace activity at mass graves in Bosnia, catch a burglar who brushed against a Hypericum bush during a crime, and has even been proposed as an additive for bullets to enable tracking them ...
Staminal - Gallery
... Insects collecting nectar unintentionally transfer pollen to other flowers, causing pollination Flower of the spider tree (Crateva religiosa) with its numerous conspicuous stamens Flowers of wheat at anthesis ...
Staminal
... stamen (plural stamina or stamens, from Latin stamen meaning "thread of the warp") is the pollen-producing reproductive organ of a flower ... tissue layer called the tapetum and initially contains diploid pollen mother cells ... to form an immature microgametophyte called a pollen grain ...
Salvia Divinorum - Botany - Reproduction
... For an unknown reason, pollen fertility is also comparatively reduced ... There is no active pollen tube inhibition within the style, but some event or process after the pollen tube reaches the ovary is aberrant ...

Famous quotes containing the word pollen:

    Books are the bees which carry the quickening pollen from one to another mind.
    James Russell Lowell (1819–1891)

    Everything was blamed on Castro. Mudslides in California. The fact that you can’t buy a decent tomato anymore. Was there an exceptionally high pollen count in Massapequa, Long Island, one day? It was Castro, exporting sneezes.
    Calvin Trillin (b. 1935)