Pollen of Elder tree

Pollen of Elder tree

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Caption: Elder pollen grains. Coloured scanning electron micrograph (SEM) of pollen grains of the elder tree, Sambucus nigra. These grains are wind-borne pollen. The grains contain the male gametes of the flowering plant. The pollen grains shown here can be seen to have 3 distinct grooves along their sides, 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: x750 at 6x7cm size.

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Keywords: botany, coloured sem, common elder, dispersal, elder, elder pollen, nature, plant, plants, pollen, pollen grains, reproduction, reproductive, sambucus nigra, type, wind dispersed, windborne

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