Root nodule of white clover plant
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Root nodule of white clover plant
False-colour scanning electron micrograph of a root nodule on the white clover plant, Trifolium repens, caused by the nitrogen-fixing bacteria Rhizobium trifolii. The bacteria convert atmosph- eric nitrogen into a usable organic form, something the clover cannot do itself, but which is imperative for its survival. Bacteria infect the plant through root hairs, forming an infection thread, which conveys them from the entry point to the nodule site. Here they divide repeatedly, swell up, & become known as bacteroids. The nodule consists of a central region filled with bacter- oids surrounded by a spongy region, the cortex, seen here. Magnification: x6 at 35mm size
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Media ID 6292001
© DR JEREMY BURGESS/SCIENCE PHOTO LIBRARY
Bacteria Bacterial Bacteriology Bacterium Clover Micro Organisms Microbe Microbes Nitrogen Fixing Soil Symbiosis Trifolium Repens False Coloured Micro Biology
EDITORS COMMENTS
This print showcases the intricate root nodule of a white clover plant, revealing the fascinating symbiotic relationship between the plant and nitrogen-fixing bacteria. In this false-colour scanning electron micrograph, we witness the remarkable process by which Rhizobium trifolii, a type of nitrogen-fixing bacteria, converts atmospheric nitrogen into an organic form that is essential for the survival of Trifolium repens. The image captures the moment when these beneficial bacteria infect the plant through its delicate root hairs, forming an infection thread that guides them to their destination within a nodule. Once inside, they undergo division and transform into specialized structures called bacteroids. The central region of the nodule is filled with these bacteroids surrounded by a spongy cortex region visible in this photograph. By converting atmospheric nitrogen into an organic form usable by plants like white clover, these nitrogen-fixing bacteria play a crucial role in sustaining life on Earth. This extraordinary partnership between microbe and plant highlights nature's ability to create intricate systems for mutual benefit. With its high magnification power at 35mm size (x6), this stunning SEM image from Science Photo Library not only offers scientific insight but also captivates viewers with its vibrant false colours and detailed portrayal of microscopic wonders. It serves as a reminder of how even at such tiny scales, unseen interactions shape our world's ecosystems.
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