Filaments of Spirogyra alga

Filaments of Spirogyra alga

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This image is part of the feature The Algae

Credit: POWER AND SYRED/SCIENCE PHOTO LIBRARY

Caption: Light micrograph of filaments of Spirogyra, a green alga which forms slimy threads called "water- silk" or "mermaid's tresses" in stagnant or slow moving water. The filament is made up of elongated cells which secrete a mucilaginous substance which binds adjacent filaments. Each cell contains one or more chloroplasts, arranged in spiral bands. The chloroplasts contain green chlorophyll pigments & are sites of photosynthesis within each cell. Dark field illumination. Magnification x400 at 35mm size.

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Keywords: alga, algae, algal, botany, chloroplast, green, in nature, light micrograph, nature, plant, spiral form, spirogyra, spirogyra sp.

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