Fern sorus and spore cases, fluorescence light micrograph

Fern sorus and spore cases, fluorescence light micrograph

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Credit: FRANK FOX/SCIENCE PHOTO LIBRARY

Caption: Fern sorus. Fluorescence light micrograph of a sorus on the underside of a fern frond. A sorus is a cluster of spore-producing receptacles called sporangia. Each sporangium is packed with spores, which are the fern's reproductive cells. A rim of thick-walled cells, the annulus, functions to open and rapidly close each sporangium when the spores are mature, releasing them into the environment.

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Keywords: annulus, biological, biology, botanical, botany, cell, cells, cluster, color, colorful, colour, colourful, fern, flora, fluorescence, fluorescent, focus stacking, foliage, frond, guard cell, haploid, horticultural, horticulture, image stacking, leaf, light, light micrograph, light microscope, light microscopy, lm, micrograph, microscopic, microscopy, nature, optical, plant, reproduction, reproductive, sori, sorus, sporangia, sporangium, spore, spore case, spores, stacked, stoma, stomata

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