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Cotton (Gossypium) pollen-Probable Cotton Pollen embryo sack (Nemec Phenomenon)

cotton pollen grain showing probable Cotton Pollen nuclear embryo sack (Nemec Phenomenon) observed in a permanently mounted and stained cross section of a cotton floral bud. 5 nuclei can be seen. The extra nuclei are produced by repeated divisions of the vegetative nucleus after the generative nucleus has degenerated. Magnification 1000x oil immersion.

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Uploaded on October 21, 2013
Taken on October 17, 2013