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questions :What is Pollen grains?
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[Member (365WT)]answers [Chinese ]Time :2019-02-06
Pollen grains are microspore heaps of seed plants, and mature pollen grains are small gametophytes, which can produce male gametes. Usually very small, from a few micrometers to a few hundred micrometers (10 to 200 micro-meter). Pollen is produced by anthers in the stamens of the seed plant, reaches the pistil via various methods, and finally fertilizes the ovule.

     by

     Pollination

     major factor

     Enzymes and various metabolites stored in pollen grains

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