Nitrogen-fixing nodules on roots of pea plant

Nitrogen-fixing nodules on roots of pea plant

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Credit: HUGH SPENCER/SCIENCE PHOTO LIBRARY

Caption: Nitrogen-fixing nodules on the roots of a pea plant (Pisum sativum) allow the plant to utilize free nitrogen in the atmosphere and soil. Symbiotic bacteria in the nodules fix the nitogen, transforming it into a form useable to the plant. 2X

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Keywords: agriculture, bacteria, bacterial, bacteriology, bacterium, botany, flora, gardening, legume, legumes, leguminosae, micro-organisms, microbe, microbes, microbiology, mutualism, mutualisms, mutualistic, nitrogen-fixation, nitrogen-fixing, nitrogen-fixing nodule, nitrogen-fixing nodules, nodule, nodules, pea, peas, pisum, pisum sativum, plant, plants, rhizobium, root, roots, sugar snap pea, sugar snap peas, symbiosis, symbiotic

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