Pollen | Wikipedia audio article
Channel: wikipedia tts
Date: 23/06/2019

This is an audio version of the Wikipedia Article:
https://en.wikipedia.org/wiki/Pollen


00:01:31 1 The structure and formation of pollen
00:02:10 1.1 Formation
00:05:22 1.2 Structure
00:10:15 2 Pollination
00:12:57 3 Pollen in the fossil record
00:14:09 4 Allergy to pollen
00:17:41 4.1 Treatment
00:18:58 5 Nutrition
00:22:24 5.1 In humans
00:24:00 5.2 Parasites
00:25:08 6 Forensic palynology
00:25:57 7 Spiritual purposes
00:26:34 8 See also



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SUMMARY
=======
Pollen is a fine to coarse powdery substance comprising pollen grains which are male microgametophytes of seed plants, which produce male gametes (sperm cells). Pollen grains have a hard coat made of sporopollenin that protects the gametophytes 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. If pollen lands on a compatible pistil or female cone, it germinates, producing a pollen tube that transfers the sperm to the ovule containing the 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, archaeology, and forensics. 
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. In a case of self-pollination, this process takes place from the anther of a flower to the stigma of the same flower.Pollen is commonly used as food and food supplement. However, because of agricultural practices, it is often contaminated by agricultural pesticides.