Transcript Slide 1
Plant Transport Stem Tissues: An Indepth Look Nodes: where the leaf meets the stem. Internodes: space between the nodes. Analogy: like your joints Plant Transport Stem Tissues: An Indepth Look Stem Tissues: An Indepth Look Xylem + cambium + phloem = vascular bundles Stem Tissues: An Indepth Look Bark cambium: to protect the insides of a tree. Stem Tissues: An Indepth Look Bulbs: Vertical underground shoots consisting mostly of enlarged bases of leaves that store food. Example: onions Tubers: fleshy stem with wide spreading rootsstem is underground. Example: Potato Rhizomes: stems that run above ground. Contains fleshy parts that are stored food for the plant. Example: pumpkins, zucchini, squash, Stolons : viney/runner like stems that travel above ground. They are thinner, and not fleshy. Example: strawberries (grapes and eggplant) Questions to Ponder… • Why would girdling, the removal of bark and vascular cambium in a narrow ring all the way around a tree, result in the death of a tree? • If you remove the apical meristem from a dicot plant, what would be the effect on further plant growth? • Of what value are tubers, a type of stem modification, to the survival of a plant species? Root Tissues: Closer Look Brainstorm: If you were to design the perfect root system for a plant, how might it look like? --spidery for increase surface area --longer, to draw more nutrients and water, more spread out with less competition for resources. --sturdy to survive tough weather Root Tissues: Closer Look Root Tissues: Closer Look Root Tissues: Closer Look Root Tissues: Closer Look Root Tissues: Closer Look Root Tissues: Closer Look Apical meristem Root Tissues: Closer Look Zone of Maturization Root Tissues: Closer Look How does water pass through to get into root for transport? Epidermisendodermispericycle or cambium xylem Symplastic Route (class exchange): Apoplactic Route (going through hall ways): Root Tissues: Closer Look How do ions get into roots? Diffusion: movement of particles from area of higher concentration to an area of lower concentration Fungal Hyphae: The stretching of the fungus to get food and water. Plants with fungi on them benefit from their relationship. Active Transport: when energy (ATP) is used to transport substances between membranes Root Tissues: Closer Look The Hydrogen Pump (1) Uses Active transport (ATP) to move the proton (hydrogen ions) from the cytoplasm To the lysoome (or one area to another) (2) The protein changes shape to bring H ions through: The protein is conformation A When it receives an ion. Under ATP, it turns to conformation B to release the ion to the Other side. http://highered.mcgraw-hill.com/olc/dl/120068/bio05.swf Modified Root Systems Prop Roots (corn plant) Storage Roots (carrots and beets) Air Roots (mangrooves and cypress trees) Buttress Roots (fig tree) Plants water and mineral movement Vessel Member Description: dead plant cells One huge tube for water transport Tracheid Description: dead plant cells Separate tubes for separate directly traveling water More water can travel in more places