ROOTS!!

The place where the journey begins

There are 4 jobs that roots do:

1. Anchor– The tree failed

before the roots.

– Why do most trees fall when it rains?

There are 4 jobs that roots do:

• Absorb– The

main thing they absorb is water

Root structures

• Root hairs – How do you think these help with absorption?

There are 4 jobs that roots do:

• Transport– What needs

to be transported?

Root structures• Central / Vascular cylinder – xylem, phloem

and cambium• What is the job of xylem? Phloem? • Cambium makes more xylem and phloem

There are 4 jobs that roots do:

• Store

Root structures

• Cortex – main site of storage

TurnipsLook in this reading for the sad story of turnips. turnips

Jack o LanternsCheck out this link on the history of jack o lanternsjack o lanterns

Carrots and….http://www.youtube.com/watch?v=LOiKa51ll-k

Read the part under “the partridge familySusan Dey

Read about cartotenemiacarotenemia

CassavaRead the following about the good and bad of cassavacassava

Meristem• Growth regions of the plant– Found at the ends of the root and the stem– What cellular process do you think happens here?

Two types of root systems:

• Fibrous

Two types of root systems:

• Tap

4 Zones of roots

4 Growth regions of the plant

• Root cap– Protects and

produces a slime

4 Growth regions of the plant

• Zone of cell division / meristematic growth

4 Growth regions of the plant

• Zone of elongation– Cells grow but

they are unspecialized

4 Growth regions of the plant

• Zone of maturation / absorption – specialization occurs

Root structures

• Epidermis – outer covering

Specialized roots – Food storage

Specialized roots

• Water storage• Remember this plant?

Specialized roots• Propagative – roots that produce clones by

spreading out and then send up new shoots• Most cherry orchards are produced this way

Specialized roots

• Pneumatophores• Read pneumatophores :

Specialized roots

• Aerial Roots• Read the following Aerial root

Specialized roots

• Buttress roots

Buttress roots

Specialized roots

• Prop roots

Specialized roots

• Parasitic roots

Specialized roots

• Climbing roots

Nitrogen fixationGo to the bottom of this page to read about and understand nitrogen fixationnitrogen fixation

Legumes