Pollen grains of Elder flower

Pollen grains of Elder flower

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Caption: Scanning electron micrograph of pollen grains of Elder Sambucus nigra, which contain the male gametes of the flowering plant. The pollen grains shown here can be seen to have 3 distinct grooves along their sides, when viewed end on, called germinal furrows. When the pollen grain lands on the stigma of the appropriate plant it will germinate & a pollen tube will grow out of one of the furrows. The pollen tube grows down the stigma to the ovary, the male nuclei pass down the tube to fertilize the ovules within the ovary & a seed is formed. Magnification: x7500 (at 10x8 size).

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Keywords: botany, elder, elder pollen, nature, plant, plants, pollen, reproduction, reproductive, sambucus nigra, type

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