Fern spore capsule, light micrograph

Fern spore capsule, light micrograph

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Credit: DR KEITH WHEELER/SCIENCE PHOTO LIBRARY

Caption: Fern spore capsule, polarised light micrograph. Transverse section through the frond of a hart's tongue fern (Phyllitis scolopendrium), showing the sporangia (centre). On the underside of the frond is a lens-shaped structure called a sori. This contains numerous stalked sporangia (round), containing reproductive spores. The edge of the sori is made up of thick-walled cells (bright red, green, and yellow), which help to disperse the spores by exploding. Magnification: x100 when printed at 10 centimetres wide.

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Keywords: anatomical, biological, biology, botanical, botany, cell, cells, cellular, close-up, cross-section, detail, fern, ferns, flora, frond, hart's tongue fern, internal structure, light micrograph, light microscope, lm, nature, part, parts, phyllitis scolopendrium, plant, plant anatomy, plants, plm, polarised, polarized, pteridophyte, pteridophytes, purple background, reproduction, reproductive, reproductive part, reproductive parts, scolopendrium vulgare, section, sectioned, sori, sorus, sporangia, sporangium, spore capsule, spore capsules, structural, tissue, transverse

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