Acorus calamus rhizome, light micrograph

Acorus calamus rhizome, light micrograph

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Caption: Acorus calamus rhizome. Light micrograph of a section through a rhizome from a sweet flag (Acorus calamus) plant. The rhizome has an outer layer with scattered collateral vascular bundles and a central cylindrical core of larger vascular bundles. The inner core has an outer ring (endodermis) and an inner layer (pericycle). The ground tissue is spongy aerenchyma with thin-walled cells and larger inter-cellular spaces to store oxygen. The vascular bundles have a ring of outer xylem (red), which carries water and minerals to the stems, and a surrounding inner phloem (blue), which carries sugar to the rhizome to be stored as starch. Magnification: x70 when printed 10 centimetres wide.

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Keywords: acorus calamus, angiosperm, angiosperms, biological, biology, botanical, botany, bundles, cell, cell biology, cells, central core, close-up, collateral vascular bundle, cytological, cytology, detail, endodermis, ground tissue, histological, histology, inter-cellular space, light micrograph, light microscope, lm, microscopy, monocot, monocots, monocotyledon, monocotyledons, pericycle, phloem, plant, plants, rhizome, section, sectioned, spaces, spongy aerenchyma, stain, stained, structural, structure, structures, sweet flag, thin-walled, tissue, white background, xylem

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