Pollen of the passion flower

Pollen of the passion flower

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Credit: J.C. REVY, ISM/SCIENCE PHOTO LIBRARY

Caption: False-colour scanning electron micrograph (SEM) of a pollen grain of the passion flower, Passiflora amethystina. This spherical pollen grain resembles a tennis ball, with three germinal furrows (two appear here) dividing a highly-sculptured outer wall (exine). When the pollen grain, containing the male gametes, lands on the stigma of the flower, it germinates. A pollen tube grows out of one of the germinal furrows, growing down the stigma & into the ovary. The male gametes pass down the tube & into the ovary where one fuses with an ovule (egg cell) to form a seed. Magnification: x2600 at 6x7cm size.

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Keywords: botany, nature, passiflora amethystina, passion flower, passion flower pollen, plant, plants, polle, pollen, reproduction, reproductive, type

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