Female pine cone scales. Light micrograph of a section through two scales from a young ovulate female Scot's pine (Pinus sylvestris) cone, bearing ovu
Female pine cone scales. Light micrograph of a section through two scales from a young ovulate female Scot's pine (Pinus sylvestris) cone, bearing ovules (large, oval). Each scale supports a lower basal bract scale (top). On the upper ovuliferous scale there is a basal bare ovule (central oval with white space), surrounded by the integument and nucellar tissue (around the ovule), which is pierced by a tube, the micropyle (shown in the upper scale). The micropyle enables the pollen to reach the top of the archegonium (circular brown cells) where the egg (ovum) will reside. Magnification: x37 when printed 10 centimetres wide.
Size: 5125px × 3417px
Photo credit: © DR KEITH WHEELER/SCIENCE PHOTO LIBRARY / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: archegonium, background, basal, biological, biology, botanical, botany, bract, cell, cells, close-, cone, cytological, cytology, detail, female, gymnosperm, gymnosperms, histological, histology, integument, light, micrograph, micropyle, microscope, microscopy, nucellar, ovulate, ovule, ovules, ovuliferous, pine, pinus, plant, plants, reproductive, scale, scales, scots, scotss, section, sectioned, stain, stained, structural, structure, structures, sylvestris, tissue, tree, white
