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Sem of pollen from daisy
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Sem of pollen from daisy
Daisy pollen. Coloured scanning electron micrograph (SEM) of two pollen grains of the common daisy, Bellis perennis. The outer wall (exine) of each grain has spiky projections. These spines catch in the body hairs of pollinating insects. The insects then fly to other flowers and so pollen is transferred. Pollen contains the male reproductive cells of the plant. When the pollen grain, containing male gametes, lands on the stigma of a flower, it germinates. A pollen tube grows down through the stigma, to the ovary. Male nuclei pass down the tube, fertilize the ovules and a seed is formed. Magnification: x1, 400 at 6x7cm size. Magnification: x3, 000 at 5x6 inch size
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Media ID 9194553
© POWER AND SYRED/SCIENCE PHOTO LIBRARY
Bellis Perennis Daisy Plants Pollen Reproduction Reproductive Type
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This print showcases the intricate beauty of daisy pollen under a coloured scanning electron microscope (SEM). Each grain of pollen from the common daisy, Bellis perennis, is adorned with spiky projections on its outer wall. These delicate spines serve a crucial purpose in the plant's reproductive cycle by catching onto the body hairs of pollinating insects. As these insects visit other flowers, they inadvertently transfer the pollen grains, facilitating cross-pollination. Pollen plays a vital role in plant reproduction as it contains the male reproductive cells. When a pollen grain lands on the stigma of a flower, it begins to germinate. A remarkable process unfolds as a slender tube emerges from the grain and grows down through the stigma towards the ovary. Within this tiny tube, male nuclei travel downwards to fertilize ovules and initiate seed formation. At magnifications of x1,400 for 6x7cm prints or x3,000 for 5x6 inch prints, this image allows us to marvel at nature's microscopic wonders. It serves as an awe-inspiring reminder that even within seemingly small and unassuming elements like pollen grains lie extraordinary mechanisms that ensure plants' survival and propagation.
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