Nitrogen-fixing bacteria on root

Nitrogen-fixing bacteria on root

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Caption: Scanning electron micrograph (SEM) of a nitrogen- fixing bacterium, Rhizobium leguminosarum, on the root hair of a pea plant, Pisum sativum. Rhizobium is a free-living soil bacterium for most of its life, but at times forms a symbiotic association with the roots of leguminous plants. In return for breaking down atmospheric nitrogen & converting it into a form the plant can use, the bacterium gains access to the plant's carbohydrate food stores & is kept safe in the plant's tissue. Magnification: x9285 at 35mm size, x65,000 at 8x10-inch size.

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Keywords: bacteria, bacterial, bacteriology, bacterium, micro-organisms, microbe, microbes, microbiology, nitrogen-fixing, nitrogen-fixing bacteria, pea, rhizobium leguminosarum, root hair, scanning electron micrograph, sem

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