Gymnosperm Stem: Resin Duct in One Year Pinus
cross section: Pinus stem
magnification: 400x
Triarch quadruple stain
Berkshire Community College Bioscience Image Library
Conspicuous resin ducts are found in the cortex, primary and secondary xylem, but rarely the pith. The ducts are surrounded by secretory parenchyma that produces resins and many toxic terpenes including the turpentines. This antiseptic material solidifies when exposed to air, acting to seal wounds, to protect the plant from fungi, insect and bacterial infection and to discourage herbivores. Some secretory cells enlarge into dark staining tyloses that block the resin dusts.
Visit the BCC Bioscience Image featuring the Microscopic World of Plants. www.berkshirecc.edu/biologyimages
Technical Questions:bioimagesoer@gmail.com
Gymnosperm Stem: Resin Duct in One Year Pinus
cross section: Pinus stem
magnification: 400x
Triarch quadruple stain
Berkshire Community College Bioscience Image Library
Conspicuous resin ducts are found in the cortex, primary and secondary xylem, but rarely the pith. The ducts are surrounded by secretory parenchyma that produces resins and many toxic terpenes including the turpentines. This antiseptic material solidifies when exposed to air, acting to seal wounds, to protect the plant from fungi, insect and bacterial infection and to discourage herbivores. Some secretory cells enlarge into dark staining tyloses that block the resin dusts.
Visit the BCC Bioscience Image featuring the Microscopic World of Plants. www.berkshirecc.edu/biologyimages
Technical Questions:bioimagesoer@gmail.com