Female pine cone. Light micrograph of a longitudinal section through the female cone (strobilus) of a pine tree (Pinus sp.). The cone has a central ax
Female pine cone. Light micrograph of a longitudinal section through the female cone (strobilus) of a pine tree (Pinus sp.). The cone has a central axis (dark blue), from which emanate woody ovuliferous scale leaves (megasporophylls, dark purple to dark orange). At the base of each, on the upper side, are two sac-like megasporangia (thick purple walls) inside which is an elongated spherical ovule (dark red-purple). The ovule consists of outer integuments, inside which is the nucellus (megasporangium) which contains the megagametophyte containing two eggs (not seen). Magnification: x6 when printed 10 centimetres wide.
Size: 4252px × 5616px
Photo credit: © DR KEITH WHEELER/SCIENCE PHOTO LIBRARY / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: background, biological, biology, botanical, botany, cell, cells, cone, conifer, coniferous, cytology, developing, female, flora, gymnosperm, gymnosperms, integument, integuments, leaf, leaves, light, lm, loniudnal, megasporangia, megasporangium, megaspore, megaspores, megasporophyll, megasporophylls, micrograph, microscope, nature, nucellus, ovule, ovuliferous, part, parts, pine, pinus, plant, reproductive, scale, section, sectioned, sp., sporophyll, sporophylls, strobilus, structure, structures, tree, white
