SEM of pollen grain of Morning Glory

SEM of pollen grain of Morning Glory

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Caption: Morning Glory pollen. 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: x1030 at 10x8 inch size.

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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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