SEM of pollen grains of Common Mallow

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SEM of pollen grains of Common Mallow

False-colour scanning electron micrograph of pollen grains of Common Mallow, Malva sylvestris. The grains are spherical & about 108 micrometres across. Their outer wall (exine) consists of numerous sharp spines which enables the pollen to attach to the body appendages of insects. The pollen is thus dispersed to other flowers which the insect visits. When the pollen, containing the male gametes, is transferred to the stigma of another flower, it germinates. A pollen tube grows out from the grain, down through the stigma, to the ovary. The male nuclei pass down the tube, fertilize the ovules & a seed is formed. Magnification: x220 at 6x4.5cm size. JBU colouring: green & yellow. BW original is B786/250

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Media ID 6289109

© DR JEREMY BURGESS/SCIENCE PHOTO LIBRARY

Common Mallow Jbu Colouring Mallow Malva Sylvestris Pollen Re Production Reproductive Type

EDITORS COMMENTS
This print showcases the intricate beauty of Common Mallow pollen grains. In this false-colour scanning electron micrograph, the spherical grains, measuring approximately 108 micrometres across, are brought to life in stunning detail. The outer wall of these grains, known as exine, is adorned with numerous sharp spines that serve a crucial purpose - enabling the pollen to attach itself to the body appendages of insects. Through this clever adaptation, the Common Mallow ensures its pollen is dispersed to other flowers visited by these insects. Once transferred onto another flower's stigma, germination takes place. A remarkable process unfolds as a pollen tube emerges from the grain and grows down through the stigma towards the ovary. Within this tiny tube lies male gametes that travel downwards and fertilize ovules present in the ovary. This successful union culminates in seed formation and perpetuates new life for future generations of Common Mallow plants. The image has been magnified 220 times at a size of 6x4.5cm and features JBU colouring in shades of green and yellow. It serves as a testament to nature's ingenuity and reminds us of how intricately connected plant reproduction is with various organisms within their ecosystem.

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