Germinating plane tree pollen grain, SEM

Germinating plane tree pollen grain, SEM

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Caption: Germinating plane tree pollen. Coloured scanning electron micrograph (SEM) of a plane tree (Platanus sp.) pollen grain that has sprouted a pollen tube (brown). Pollen contains the male sex cells of a plant. Pollen tubes are produced when a pollen grain lands on the pistil (female part) of a flower. The tube burrows down into the pistil to reach the ovaries, where it fertilises the ovum (egg cell).

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Keywords: biochemical, biological, biology, botanical, botany, coloured, exine, false-coloured, flora, gamete, gametes, germinating, germination, male, nature, one, outer wall, plane tree, plant, plants, platanus sp., pollen, pollen grain, pollen tube, pollination, reproduction, reproductive, scanning electron micrograph, scanning electron microscope, sculpted, sem, sex cell, single, sprouting

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