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Unformatted text preview: Chapter 36 PLANT FORM AND FUNCTION Chapter 36 PLANT FORM AND FUNCTION Plant Anatomy and Physiology Summary Summary *Plant Form *Root system *Shoot system *Stems *Leaves *Plant Cells *Plant Tissues *Plant Growth Introduction Introduction *Unlike animals, plants sit in one place but do remarkable things. *Gather light and CO 2 and produce carbohydrates. *Absorb water and ions from the soil and produce all of those other compounds that make up the organism nucleic acids, proteins, lipids, etc. *Plant anatomy (structure) is well suited for these functions. Plant Form - General Plant Form - General *Plants have root systems to absorb water and ions and shoot systems to gather sunlight and CO 2 . *The two systems are connected, in most plants, by a vascular system. Root System Root System *Types of roots, fig 36.2 *Tap roots vertical roots that may extend many meters into the earth. *Lateral roots horizontal roots that may extend well beyond the canopy of the plant. Roots Roots *Root Modifications, fig 36.6 *Prop roots monocots, corn *Buttress roots Banyan trees *Aerial roots orchids *Pneumatophores facilitate oxygen uptake, cypress knees *Contractile roots at the end of bulbs *Food storage roots carrots Shoot Systems Shoot Systems *Shoot anatomy, fig 36.3....
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