Plant tissues. Support
LAMELLAR COLLENCHYMA
Organ: stem, lamellar collenchyma.
Species: elderberry (Sambucus nigra).
Technique: paraffin embedding, section stained with Alcian blue / safranin.
Species: elderberry (Sambucus nigra).
Technique: paraffin embedding, section stained with Alcian blue / safranin.
Lamellar collenchyma shows primary cell thickenings in the internal and external tangential walls, both sides being parallel to the surface of the organ. Although it is mainly found in organs undergoing primary growth, this picture shows laminar collenchyma in an elderberry stem with secondary growth.