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Unformatted text preview: Conifer wood contains only tracheids, no vessels and minimal parenchyma, so conifer wood appears more uniform than the wood of flowering plants that have larger diameter vessels, along with the numerous fibers. Conifer tracheids are characterized by prominent bordered pits along their walls. Microscopically, the bordered pits of tracheids are spectacular. In addition, resin ducts (or canals) are present in conifers. A resin canal is lined by a ring of parenchyma cells. Resin is believed to be a defense mechanism that helps protect the plant from predator damage. Pine: two-year cross section...
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This note was uploaded on 01/08/2012 for the course BIO 213 taught by Professor Makina during the Fall '09 term at SUNY Stony Brook.
- Fall '09