Students will be able to know the 3 different types of roots systems and identify them by going outside.

Root System Video

ORGANS ORGANS - have one or more FUNCTIONS and composed of SEVERAL TISSUES ROOTS are the simplest

FUNCTIONS of ROOTS ANCHORAGE

FUNCTIONS of ROOTS ABSORBING and CONDUCTING Water and Nutrients Important for Perennials

FUNCTIONS of ROOTS FOOD STORAGE Taproots Fascicled roots

FUNCTIONS of ROOTS FOOD STORAGE in Cortex

CLASSIFICATION of ROOTS Based on where they originate PRIMARY First seedling root SECONDARY Branches off primary or secondary roots ADVENTITIOUS Arises from another plant part

CLASSIFICATION of ROOTS Based on TYPE of ROOT SYSTEM Taproot Fibrous Fascicled

Tap Roots Primary root is DOMINANT DEEP, non-branching roots Good ANCHORING Can be ENLARGED for STORAGE DIFFICULT to TRANSPLANT – easily damaged Example: Carrots, dandelions, conifers

Fibrous Roots Primary and secondary roots DEVELOP EQUALLY SHALLOWER, SPREADING roots Good EROSION CONTROL - large surface area to capture water and soil EASY to TRANSPLANT ALL ADVENTITIOUS root systems are FIBROUS Examples: Sod, Rhododendrons

Fascicled or Tuberous Roots Fibrous root system used to STORE FOOD Examples: Dahlia, Sweet potato

Assignment Make the following chart Go outside and dig up roots of weeds for examples of fibrous (grass), tap roots (dandelion), and fascicled (dahlia). 5 fibrous and tap roots, 1 fascicled Plant Root System (Name) Draw a Picture of the Root System

OSMOSIS LAB You need the following: 2 white cups Water 1 rib of lettuce Food coloring Cutting device You will need to make observations of your plants before and after the lab What color is the leaf, How much color is left in the water, ect Complete lab

Root Anatomy MATURATION REGION DIFFERENTIATION taking place Formation of SPECIALIZED tissues ELONGATION REGION Elongation PUSHES root into soil No differentiation

Root Anatomy MERISTEMATIC REGION – Apical Meristem Divides both ways ROOT CAP PROTECTS young growing tip

ROOT PHYSIOLOGY Water and Nutrient CONDUCTION is comprised of THREE ACTIONS ROOT PRESSURE CAPILLARITY TRANSPIRATION

ROOT PRESSURE OSMOSIS Water seeks to equalize concentration in cells of root compared to pores in soil Pathway A – Intercellular Spaces Pathway B – Root Hairs

CAPILLARY ACTION Chemical property of water due to the POSITIVE & NEGATIVE CHARGES on the WATER MOLECULE Adhesion- attraction of 2 different substance Cohesion- attraction of 2 alike substances

TRANSPIRATION TRANSPIRATIONAL PULL As WATER EVAPORATES or DIFFUSES from the surface of a leaf, and as cells replace water, the continuous loss of water PULLS it up through plant

HOMEWORK color pages 11-14

SPECIALIZED ROOTS and ASSOCIATIONS PROP ROOTS Added Support Corn and Tropical Plants

SPECIALIZED ROOTS and ASSOCIATIONS CLIMBERS Climbing trees and walls Ivy

SPECIALIZED ROOTS and ASSOCIATIONS PNEUMATOPHORES (U-Met-A-Fors) Roots grow from stem into air to provide anchoring and aeration in swampy soils Bald Cypress

SPECIALIZED ROOTS and ASSOCIATIONS EPIPHYTES grow above ground on trees without soil hang on trees by roots absorb moisture from air some photosynthesize Orchids, mosses, lichens, and licorice fern

SPECIALIZED ROOTS and ASSOCIATIONS CONTRACTILE ROOTS Contract or expand to pull bulb into soil for correct depth lily, freesia bulbs

SPECIALIZED ROOTS and ASSOCIATIONS PARASITIC ROOTS Penetrate host for water and sometimes nutrients Mistletoe, Dodder

SPECIALIZED ROOTS and ASSOCIATIONS SUCKERS roots that have adventitious buds that form new plants Blackberries, raspberries, oaks

Assignment You will create a collage of all 7 root systems You need to have the following: Root name Root description Root examples (5) Roots pictures It must be colored and creative