Credit: FRANCIS LEROY & MAXIMILIEN MOENS, BIOCOSMOS/SCIENCE PHOTO LIBRARY

Caption: Nitrogen-fixing root nodule formation. Animation showing the process by which nitrogen-fixing bacteria form a symbiotic relationship with a plant, resulting in a root nodule. Certain plants (such as legumes) are able to obtain atmospheric nitrogen via a symbiotic relationships with bacteria in their roots (typically Rhizobia bacteria). This process starts with the root (left) forming a root hair and emitting chemical signals (flavonoids, blue) that attract the bacteria (white). The bacteria stimulate the root hair, causing it to elongate and enclose the bacteria. The bacteria then enter and infect the root hair, forming an infection thread (pink) that penetrates into the root. The bacteria then develop into a new form called bacteroids (round). Further processes result in the formation of the root nodule containing the nitrogen-fixating bacterial units (red).

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Keywords: atmospheric nitrogen, bacteria, bacterium, bacteroid, bacteroids, biological, biology, botanical, botany, cell, cells, cellular, chemical stimulus, flavonoids, infected, infection, legumes, micro-organism, micro-organisms, microbe, microbes, microbial, microbiological, microbiology, microorganism, microorganisms, nitrogen fixation, nitrogen fixing, nodule, plant physiology, rhizobia, root, root hair, roots, symbiosis, symbiotic, thread

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Nitrogen-fixing root nodule formation

K004/2687 Rights Managed

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Duration: 00:00:41.16

Frame size: 1920x1080

Frame rate: 25

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Format: QuickTime, Photo JPEG 100%, progressive scan, square pixels

File size: 570.8M

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Capture format: QuickTime Animation

Codec: Photo - JPEG

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