PBIO 1210 week 1 (Momany/Burke)
PBIO 1210 week 1 (Momany/Burke) Pbio 1210
Popular in Principles of Plant Biology
verified elite notetaker
Popular in Plant Biology
This 3 page Class Notes was uploaded by Maddi Huff on Friday August 19, 2016. The Class Notes belongs to Pbio 1210 at University of Georgia taught by Momany in Fall 2016. Since its upload, it has received 52 views. For similar materials see Principles of Plant Biology in Plant Biology at University of Georgia.
Reviews for PBIO 1210 week 1 (Momany/Burke)
Report this Material
What is Karma?
Karma is the currency of StudySoup.
You can buy or earn more Karma at anytime and redeem it for class notes, study guides, flashcards, and more!
Date Created: 08/19/16
Guide: Vocabulary People PBIO 1210- Principles of Plant Biology Lecture Notes Week 1 8/11/16 1. What makes a plant a plant? a. Contain chlorophyll for absorbing light for photosynthesis i. Photosynthesis- Production of organic food from inorganic molecules using the energy of light ii. Non-plants can also be photosynthetic, such as algae iii. Not all plants are photosynthetic, such as parasites b. Adapted for life on land i. All land-adapted plants have embryo c. Composed of many cells d. Call walls contain cellulose 8/16/16 2. Plants and energy a. Plants produce half of earth’s atmospheric oxygen b. Plants lower carbon dioxide levels in the atmosphere i. Convert into organic compounds stored in organisms, such and coal and wood c. Greenhouse Effect- Infrared radiation (heat) from sun passes through atmosphere 3. Plant structure a. Cells i. All cells in plant contain same genetic information (DNA) ii. Specialized according to function in plant b. Tissues (groups of cells) i. Simple tissues- one or two cell types ii. Complex cells- several cell types iii. Xylem- supports plant and conducts water iv. Pholem- transports sugars and other organic compounds in watery solution c. Organs (groups of tissues) i. Roots, stems, leaves d. Organ systems (groups of organs_ i. Buds- contains tiny stem and several tiny leaves ii. Flowers- complex shoots with several organs iii. Seeds- contain stored food and a dormant embryo with tiny root and shoot 4. Plant growth a. From new cells and tissues and cell enlargement b. Primary meristems generate new primary tissues at tips of roots and shoots (apical) and at site of new branches (auxillary bud) i. Increase length ii. Axil- angle between stem and leaf stalks c. Secondary Meristems increase girth of stems and roots Guide: Vocabulary People i. Woody plants (trees, shrubs, vines) have two additional secondary meristems that produce wood, cork, and bark ii. Increase width 5. Plant cell expansion a. Increase amount of cytoplasm and number of organelles b. Plant cells can take up a lot of water into central vacuole and expand cell walls c. Expansion proteins unlock linkages between cell wall components along wall to stretch 8/16/16 1) Atoms a) They contain an equal number of protons (+ charge) and neutrons (no charge) b) Nucleus contains protons and neutrons (large mass) and is surrounded by electrons (small mass) c) Ions have lost or gained electrons so they have a positive or negative charge 2) What is a chemical bond? a) A way of binding two atoms together by sharing or giving up electrons b) Types of bonds: i) Covalent- Form between atoms that share electrons; stronger than ionic bonds. (1) Some atoms may share more than one pair of electrons (2) Double and triple bonds are even stronger (3) EX: Carbon had 4 electrons to share, allowing it to form many different compounds ii) Ionic- One atom gives up one or more electrons and becomes positively- charged while the other atom takes electrons and becomes negatively- charged (1) EX: Na(-) + Cl(+) = NaCl iii) Hydrogen- When the electrons between two atoms that differ significantly in size electrons spend more time traveling around the larger atom, so that part of the molecule has a partial negative charge iv) Partial charge is attracted to partial charge (1) Bond is polar (2) Used to bond water molecules (a) Hydrogen bonds make water an extremely effective solvent (b) Cohesion- Water molecules can be drawn up through roots and tree trunks (c) Hydrophilic- water loving, easily bonds (charged/polar) (d) Hydrophobic- water hating, does not easily bond (uncharged/nonpolar) 3) Bond strength is influenced by: a) The amount of energy used to create the bond, the stronger it is i) Hydrogen (partial charge) < ionic (full charge) < covalent (shared electrons) 4) Primary compounds a) Lipids- composed of carbon and hydrogen with small amounts of oxygen and phosphorus (in phospholipids) Guide: Vocabulary People i) Found in cooking fats, oils, waxes b) Proteins c) Nucleic acids d) Carbohydrates- composed of carbon, hydrogen, and oxygen in ratio of 1C:2H:1O. Includes: (1) Sugars like glucose (monosaccharides) (2) Double sugars like sucrose (disaccharides) (3) Polymers like cellulose and starch (polysaccharides). 5) Polysaccharides a) Made by dehydration b) Not water-soluble but good for storage and building structures c) Starch- abundant in roots and vegetables d) Cellulose- structural, found in plant cell walls e) Also a polymer of glucose but with alternate sugars flipped f) Cannot be digested by humans
Are you sure you want to buy this material for
You're already Subscribed!
Looks like you've already subscribed to StudySoup, you won't need to purchase another subscription to get this material. To access this material simply click 'View Full Document'