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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- Fall '09
- Flowering plant, Vascular plant, Pinophyta, Eudicot Wood