Pollen of Morning Glory flower

Pollen of Morning Glory flower

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Credit: SCIENCE PHOTO LIBRARY

Caption: Morning Glory pollen. Coloured scanning electron micrograph of a pollen grain of the Morning Glory plant, Ipomoea learii. The grain has a highly sculpted outer wall (exine) with crater-like germinal pores surrounded by spine-covered ridges. The spines enable the pollen to adhere to the body hairs of insects & so be transferred to other flowers. When the pollen grain, containing male gametes, lands on the stigma of a flower, it germinates. A pollen tube grows out of one of the pores, down through the stigma, to the ovary. The male nuclei pass down the tube, fertilize the ovules and a seed is formed. Magnification: x310 at 6x7cm size. x1030 at 10x8"

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Keywords: botany, exine, insect-borne, ipomoea learii, morning glory, nature, plant, plants, pollen, reproduction, reproductive, sculpted, type

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