Water lily leaf stalk. Light micrograph of a transverse section through the leaf stalk (petiole) of a water lily (Nymphaea sp.). All aquatic plants (h
Water lily leaf stalk. Light micrograph of a transverse section through the leaf stalk (petiole) of a water lily (Nymphaea sp.). All aquatic plants (hydrophytes) have a similar structure. The epidermis of the petiole has a thin cuticle (outer layer) and is permeable to water. The whole petiole consists of parenchyma cells with large air spaces (lacunae, white circles). The vascular bundles consist of a lysigenous xylem canal (green ring of cells around a cavity) and phloem (dark-green ovals either side of small green cells). The parenchyma tissue contains thick-walled sclereids (deep red) with pointed arms for support. There is no central pith. Magnification: x14 when printed 10 centimetres wide.
Size: 5146px × 5489px
Photo credit: © DR KEITH WHEELER/SCIENCE PHOTO LIBRARY / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: air, angiosperm, angiosperms, aquatic, background, biological, biology, botanical, botany, bundle, bundles, canal, canals, cell, cells, cut, cut-, cut-outs, cuticle, cutout, cutouts, cytology, epidermis, flora, hydrophyte, hydrophytic, intercellular, lacuna, lacunae, leaf, light, lily, lm, lysigenous, micrograph, microscope, nature, nympha, outs, parenchyma, permeable, petiole, phloem, plant, sclereid, sclereids, section, sectioned, sp., space, spaces, stem, structure, support, supportive, tissue, vascular, water, white, xylem
