Lime tree stem. Light micrograph of a transverse section through the one-year-old woody stem of a lime (Tilia cordata) tree. The outer layer is cork (
Lime tree stem. Light micrograph of a transverse section through the one-year-old woody stem of a lime (Tilia cordata) tree. The outer layer is cork (brown), underneath which is a layer of collenchyma (yellow-green). The raised areas in the cork are breathing pores (lenticels). The lower cortex has bands of phloem fibres (red-brown), between which are phloem sieve tubes (green). Under the phloem is a ring of cambium (brown circle) and a thick ring of wood (xylem, brown-green) composed of xylem vessels (large circular holes) and tracheid cells. The medullary rays (radial lines, yellow-green) transport water and minerals to the outside of the stem. The solid pith (centre) is composed of parenchyma cells (green-yellow). Magnification: x103 when printed 10 centimetres wide.
Size: 5192px × 5409px
Photo credit: © DR KEITH WHEELER/SCIENCE PHOTO LIBRARY / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: -year-, angiosperm, angiosperms, background, biological, biology, botanical, botany, cambium, cell, cells, cordata, cork, cortex, cut, cut-, cut-outs, cutout, cutouts, cytology, fibre, fibres, flora, growth, lenticle, lenticles, light, lime, lm, micrograph, microscope, nature, outs, parenchyma, phloem, pith, plant, plate, plates, primary, ring, rings, section, sectioned, sieve, stem, structure, support, supportive, tilia, tracheid, tracheids, tree, vessel, vessels, white, xylem
