Nitrogen-fixing bacteria, SEM

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Nitrogen-fixing bacteria, SEM

Nitrogen-fixing bacteria. Coloured scanning electron micrograph (SEM) of nitrogen-fixing soil bacteria (Rhizobium sp.) living on a root nodule of a runner bean plant (Phaseolus coccineus). These bacteria (green) have a symbiotic relationship with the plant, where both the plant and bacteria benefit from this arrangement. The bacteria are able to convert (fix) atmospheric nitrogen in the soil to ammonia, which the plant needs but is unable to make itself. In return, the plant passes carbohydrates produced during photosynthesis to the bacteria for them to use as an energy source. Magnification: x50 when printed 10 centimetres tall

Science Photo Library features Science and Medical images including photos and illustrations

Media ID 6292209

© STEVE GSCHMEISSNER/SCIENCE PHOTO LIBRARY

Bacteria Bacterial Bacteriology Bacterium Beneficial False Colour Fixation Fixing Legume Leguminous Micro Organisms Microbe Microbes Mutual Mutualism Mutualistic Nitrogen Fixing Nodule Phaseolus Coccineus Relationship Root Roots Runner Bean Symbiont Symbiosis Symbiotic False Coloured Micro Biology Microbiological Nodular

EDITORS COMMENTS
This print showcases the intricate relationship between nitrogen-fixing bacteria and a runner bean plant. In this coloured scanning electron micrograph (SEM), we witness the remarkable symbiotic bond formed between these microscopic organisms. The green-hued nitrogen-fixing soil bacteria, known as Rhizobium sp. , are seen residing on a root nodule of the Phaseolus coccineus plant. This mutually beneficial association allows both the plant and bacteria to thrive harmoniously. The bacteria possess an extraordinary ability to convert atmospheric nitrogen in the soil into ammonia, which is essential for the plant's growth but beyond its own capabilities. In exchange for their life-sustaining services, the runner bean plant generously provides carbohydrates produced during photosynthesis to fuel the energy needs of these bacterial allies. It is through this reciprocal arrangement that both parties flourish together. At a magnification of x50 when printed 10 centimetres tall, this image offers us a glimpse into an awe-inspiring world hidden beneath our feet. It reminds us of nature's intricate web of interdependencies and highlights how even at such minuscule scales, organisms can forge partnerships that benefit them collectively. With its vibrant colours and detailed structure, this photograph captures not only scientific marvels but also celebrates the beauty found within biological relationships.

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