Plant Tissues-PPT

Plant Tissues: Overview Meristems, Simple Tissues, & Complex Tissues Many of the figures found in this presentation are from the internet site and a CD entitled Plant Anatomy by Richard Crang & Andrey Vassilyev published by McGraw Hill. Meristematic tissues localized regions of cell division

Apical Meristems Primary or Transitional Meristem Primary growth

Lateral Meristems Protoderm gives rise to epidermis Ground meristem gives rise to ground tissue Procambium gives rise to 1o vascular tissue

Vascular cambium 2o vascular tissue Cork cambium or phellogen periderm Intercalary Meristems (found in the nodes of grasses) Cell Division: Mitosis (nuclear division) + Cytokinesis (cytoplasmic division) 1. Interphase 2. Prophase

3. Metaphase 4. Anaphase 5. Telophase 6. Cytokinesis Illustration from: Shoot Apical Meristem Root Apical Meristem

1. Root cap initials 2. Protoderm 3. Ground meristem 4. Procambium 5. Root cap Lateral Meristems secondary growth in woody plants

Basswood root in cross section Basswood stem in cross section; 1, 2, 3 year old stems Intercalary Meristems in Grasses wildamerica/grasslands/graslandoutline.html

Simple Tissues consisting of one cell type Parenchyma thin walled & alive at maturity; often multifaceted.

Collenchyma thick walled & alive at maturity Sclerenchyma thick walled and dead at maturity Sclerids or stone cells cells as long as they are wide Fibers cells longer than they are wide Epidermis alive at maturity

Trichomes pubescence or hairs on epidermis Root Hairs tubular extensions of epidermal cells Parenchyma Collenchyma

Sclerenchyma SCLERIDS Right-hand illustration modified from: Weier, Stocking & Barbour, 1974, Botany: An Introduction to Plant Biology, 5th Ed. FIBERS

Epidermis stoma, trichomes, & root hairs Complex Tissue

Xylem water conducting tissue; parenchyma, fibers, vessels and/or tracheids, and ray cells. Phloem food conducting tissue; sieve-tube members (no nucleus at maturity, cytoplasm present), companion cells, fibers, parenchyma, and ray cells. In flowering plants, sieve-tube members and companion cells arise from the same mother cell.

Periderm protective covering; composed of cork and parenchyma. Secretory structures responsible for making latex, resins, nectar and other substances produced and stored in channels inside the plant body. Xylem Phloem

Vascular Bundles with xylem & phloem Maize or Corn vein in cross section Alfalfa vein in cross section Periderm cork & parenchyma TWIG WITH LENTICELS

Secretory Structures

nectar (flowers) from nectaries oils (peanuts, oranges, citrus) from accumulation of glands and elaioplasts. resins (conifers) from resin canals lacticifers (e.g., latex - milkweed, rubber plants, opium poppy) hydathodes (openings for secretion of water) digestive glands of carnivorous plants (enzymes) salt glands that shed salt (especial in plants adapted to

environments laden with salt).

Recently Viewed Presentations

  • The X-Ray Telescope for Solar-B Results of the

    The X-Ray Telescope for Solar-B Results of the

    The X-Ray Telescope for Solar-B Results of the Calibration Tests and Predicted Performance Edward DeLuca for the XRT Team Contributors MSFC XRCF Jeff McCracken Cary Reily Jay Carpenter Jeff Kegley Rich Siler Dave Watson Ernie Wright Galen Zirstein Joey Norwood...
  • Achieving the Dream: Baseline Data

    Achieving the Dream: Baseline Data

    Achieving the Dream: Loudoun Campus Baseline Data Research Report No. 03-08 ... ENG 003 BIO 101 MTH 003 ENG 111 MTH 004 MTH 151 MTH 163 Loudoun Campus Cohort Enrollment in Gatekeeper Courses - I Loudoun Campus Cohort Enrollment in...
  • The Big Bang - Norwich High School

    The Big Bang - Norwich High School

    Title: The Big Bang Author: cathy carpenter Last modified by: Windows User Created Date: 10/12/2009 7:31:16 PM Document presentation format: On-screen Show (4:3)
  • Welcome CPE Webinar ADP and the ADP logo

    Welcome CPE Webinar ADP and the ADP logo

    The following program is authored by Barbara Weltman and is designed to provide accurate and authoritative information in regard to the subject matter covered. It is distributed and sold with the understanding that ADP and SmartPros Ltd. are not engaged...
  • RCRA Hazards, Properties, Toxicology

    RCRA Hazards, Properties, Toxicology

    Hazards Properties & Toxicology Definitions Hazard Mishap Risk Outrage? Hazards Properties & Toxicology Hazards: Chemical Physical Biological Uncontrolled environment Number & variety of substances Disorderly physical environment Hazards Properties & Toxicology The majority of health hazards arising from work at...
  • Built-in Predicates - University of Edinburgh

    Built-in Predicates - University of Edinburgh

    X = [a,b] ? yes Built-in Predicates var/1 nonvar/1 atom/1 atomic/1 number/1 Identifying terms integer/1 float/1 compound/1 ground/1 =../2 functor/3 Decomposing structures arg/3 findall/3 setof/3 Collecting all solutions bagof/3 Identifying Terms These built-in predicates allow the type of terms to...

    Reliabilism versus Responsibilism. Baehr (2011) understands intellectual virtues as intellectual character traits and, argues that they cannot form the basis of an adequate analysis of knowledge, but that they merit a secondary role in both reliabilist and evidentialist accounts of...
  • The Impact of Dams and Reservoirs on Public Health

    The Impact of Dams and Reservoirs on Public Health

    Malaria Water-washed Preventable by increased hand-washing eg. trachoma Dams' Threat to Public Health Stagnant water in reservoirs and irrigation ditches provide habitat for vectors Constant supply of water - Dry season no longer limits vectors Relocated population Merowe Health Impact...