Download PLANT CELLS and TISSUES

Objective:
I will be able to know and understand the meristematic
tissues and permanent tissues of a plant by completing
a collage.
PLANT CELLS
PLANT TISSUES
 CELLS that work with other cells for a COMMON
FUNCTION
TISSUES
MERISTEMATIC
Apical
Lateral
PERMANENT
Interecalary
SIMPLE
COMPLEX
Parenchyma
Vascular
Collenchyma
Xylem
Schlerenchyma
Phloem
DERMAL
Epidermis
Cork & Cork Cambium
MERISTEMATIC vs. PERMANENT TISSUE
Meristematic
Permanent
 Undifferentiated cells
undergoing active
 Cells where growth and
growth
 Mitosis- cells
dividing
differentiation is complete.
MERISTEMATIC TISSUESAPICAL
 Growth in length
 Primary growth
 Root and shoot tips
MERISTEMATIC TISSUESLATERAL
 Growth in width or girth
 Secondary growth
 Vascular cambium- dicots only
MERISTEMATIC TISSUESINTERCALARY
 Growth from the base
of nodes
 Grasses
 Allows grass to be cut
short and still grow
PERMANENT TISSUES- SIMPLE
 Contain only one type of cell
 Parenchyma
 Large rounded, loosely packed cells
 Primary in cell wall
 Produce and store food or
compounds like nectar and latex
 Collenchyma
 Elongated, unevenly thickened walls
 Adds strength but flexible
 Supports young organs (leaves, stem,
and roots)
 Sclerenchyma
 Elongated cells in secondary cell wall
 Thickest, most rigid cell walls
 DEAD
 Conducts, supports, and protects
PERMANENT TISSUESCOMPLEX
 Two or more different types of cells
 VASCULAR tissues
 XYLEM – conducts WATER
 PHLOEM – conducts FOOD
 DERMAL tissues
 EPIDERMIS – single cell layer
 CORK & CORK CAMBIUM
PERMANENT TISSUES – Complex
Vascular
 PHLOEM – conducts FOOD
 Sieve tubes

Elongated cells with sieve plates on ends, cytoplasm flows
from cell to cell, living with no nucleus
 Companion cells

Contains nucleus and controls activity of both cells
 XYLEM – conducts WATER
 Vessels

Shorter, much wider cells that lack end-plates
 Tracheids

Long and tapered with angled end-plates, in more primitive
plants
PERMANENT TISSUES – Complex
Dermal
 EPIDERMIS
 protection from water loss, heat, insects and diseases
 GAS EXCHANGE
 Cuticle

Waxy layer on epidermis for protection
 Guard cells and stomata

Opening on bottom of leaf
 Trichomes

Outgrowth of epidermal cells to form hairs or glands
PERMANENT TISSUES – Complex
Dermal
 CORK & CORK CAMBIUM
 Outer bark of woody plants
 Protects from water loss, insects, and diseases


Closely packed cells for protections
Suberin to repel water
Assignment
 Plant tissue assignment sheet