Plant Science

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Author:
tapper1808
ID:
202144
Filename:
Plant Science
Updated:
2013-02-25 00:48:54
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Plant Science
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Plant Science
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  1. Protoplast
    Delimited by plasma membrane; includes nucleus and the surrounding protoplasmic materials.
  2. Vegetative organs
    Roots, stems, leaves
  3. Reproductive organs
    Sepals, petal, stamen, pistil, carpel (fruit)
  4. Polymerization
    • Covalent linkage; dehydration synthesis (removal of H2O)
    • Polymer: eg. disaccharide
  5. Monosaccharide
    • Simple sugar
    • C backbone
    • Hydrophilic
  6. Amylose
    • Starch
    • α-glucose
    • Soluble/ easily digested
    • Function: E storage
  7. Cellulose
    • Primary structural polysaccharide
    • β-glucose; 1,4 linkage
    • insoluble/ indigestible
    • Function: structural
    • H bonds bet. chains form microfibrils
  8. Sucrose
    • C12H22O11
    • α-D-glucopyranosyl-(1→2)-β-D-fructofuranoside
  9. Peptide bond
    • Links amino acids; N-terminus to C-terminus
    • Carboxyl group to amino group
    • Dehydration synthesis
  10. Lipids
    • Triglycerides: neutral fats & oils; storage
    • Hydrophobic, no polar bonds
    • Phospholipids
    • Cutin, suberin, waxes
  11. 2° metabolite
    • Alkaloids
    • Terpenoids
    • Phenolics
  12. Alkaloid
    2° metabolite
  13. Terpenoid
    2° metabolite
  14. Phenolic
    • 2° metabolite
    • Deposited in vacuole of cell wall

    • Tannins: deter herbivores; toxins
    • Lignins: cell wall; waterproofing, anti-fungal ex. anthocyanin
  15. Meristem
    • Undifferentiated cells, found in zones of the plant where growth can take place.
    • Give rise to various organs of the plant, and keep the plant growing.
    • Developmental and phenotypic plasticity.
  16. Thylakoid
    • Site of light depepndent rxns in chloroplasts.
    • Stack= Granum

  17. Parenchyma
    • Ground tissue; most numerous in plant body.
    • In cortex of stems and roots, leaf mosophyll, and flesh of fruits.
    • Living at maturity; Mitotic
    • Undifferentiated
    • Totipotent
    • Well developed central vacuole & nucleus
    • Thin 1cell wall
    • Apical mer.-> ground mer.-> parenchyma
  18. Collenchyma
    Living at maturity
  19. Herbacious
    Non-woody part of plant
  20. Lignin
    • A phenolic
    • Enhances cell wall and waterproofing
    • Deposited in cell wall, not vacuole
  21. Xylem
    • Principle water conducting tissue
    • Involved in conduction of minerals, support and food storage.
    • Principally composed of tracheary elements: tracheids & Vessel elements
  22. Phloem
    • Principal food-conducting and substance transport tissue.
    • Lon distance signaling
  23. Tonoplast
    Membrane surrounding a vacuole.

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