Botany, Chapter 5, roots

-Anchorage

-Conduction

-Absorbtion

-Storage

-support (tree)

-prop roots (corn)

-attach to wall (ivy)

-move materials

-move water and nutrients (via xylem tissue)

-move sugars (via Phloem tissue)

-absorb water from soil using root hairs

-absorb water from the air, some plants (aerial roots)

-absorb air (Pneumotophores)

plants with roots in water, absorbs air

-stores starch (amyloplasts)

- water

- tap roots

-Fibrous roots

-Adventitious roots

• -it starts off with one central root
• *Anchorage
• * growing deep for water
• * becomes diffuse with "feeder roots"
• ex) dicots

-many equal sized roots

* Anchorage

* Water collection

-develop from another part of the plant

ex) from stem cuttings

- Epidermis

- Cortex

- Endodermis

-Vascular Cylinder

-outermost layer

• -root hairs
• * increases surface area
• *water absorbtion
• *delicate

- between epidermis and vascular cylinder

- storage: water and starch

-innermost layer of cortex

- Caspirian strip (waxy suberin)

-forces water to move into cells

- central part of root

-looks different in dicot and monocot

- pericycle

-xylem

-phloem

-just inside the endodermis

-cell division forms lateral or branch root

-conducts water/nutrients

"Dicots form a cross with arms, Monocots form a ring of circles"

-conducts sugars

"dicots between arms of Xylem"