Loading presentation...

Present Remotely

Send the link below via email or IM

Copy

Present to your audience

Start remote presentation

  • Invited audience members will follow you as you navigate and present
  • People invited to a presentation do not need a Prezi account
  • This link expires 10 minutes after you close the presentation
  • A maximum of 30 users can follow your presentation
  • Learn more about this feature in our knowledge base article

Do you really want to delete this prezi?

Neither you, nor the coeditors you shared it with will be able to recover it again.

DeleteCancel

Make your likes visible on Facebook?

Connect your Facebook account to Prezi and let your likes appear on your timeline.
You can change this under Settings & Account at any time.

No, thanks

Root, Stem, and Leaf Anatomy

No description
by

Emily Bogner

on 29 January 2013

Comments (0)

Please log in to add your comment.

Report abuse

Transcript of Root, Stem, and Leaf Anatomy

Root, Stem, and Leaf
Anatomy Roots Maintaining Health - A plant’s health is mainly tied to the health of its root system

- When roots are weakened or diseased, the whole plant has difficulties Functions of a Root System The root system serves many roles for the plant Absorb Water and Nutrients - Roots absorb all water and nutrients that a plant needs to live

-Soil moisture plays a huge role in helping/hurting plant growth

-Available water – water that can be absorbed by the plant
-Unavailable water – water that is bound too tightly to soil particles to be used
-Water holding capacity – ability of soils to hold water


a. Sandy soils have low water holding capacity


b. Clay soils have high water holding capacity
-Support above ground plant
-Hold plant to the ground in the soil Anchoring Store Food Made Through Photosynthesis - Food used later when a plant needs it to grow or survive Parts of the Root When a seed germinates, the first thing to emerge is the root

This becomes the primary root – most important in entire root system
Secondary roots – other roots that branch from the primary root

Apical meristem – at the tip of the root where new cells develop - Root cap – covers the apical meristem to protect the new cells from getting damaged as it cuts through the soil

- Epidermis – layer of cells on the surface of the root

- Root hairs – projections of the epidermis used to increase surface area for water absorption - Taproot system – one primary root and many secondary roots

Many dicots have a taproot system

- Fibrous root system – no dominant primary root, but several primary and secondary roots of similar size
Monocots Types of Root Systems Healthy Roots - Healthy roots are white in color and smell fresh

- Should be evenly dispersed in the pot or ground

- Watering the plant properly is the best way to keep the roots Stems Function of a Stem Support the leaves to reach good sunlight
Move water, minerals, and manufactured food through the whole plant
Translocation – movement of food and water through the plant tissue
Help produce food through photosynthesis
Store food to be used by the plant Structure of the Stem -Apical meristem – growing point at the tip of the stem
o Responsible for growth the length of the plant
Terminal bud – contains the apical meristem
Node – where the leaf is attached to the stem
Internode – area between leaves
Leaf scar – scar where a leaf has fallen off in a prior season
Lenticels – small spots on the stem that allow for exchanging gases in its environment Tissues Inside the Plant - Tissues inside the plant are used to transport materials
- Xylem – conducts water and minerals through the plant
- Phloem – conducts food produced from the leaves
- Vascular cambium – growth in the girth of the stem
- Growth rings – age of the tree determined in year
o Summer/wet years – large rings
o Winter/dry years – small rings Bulb – short, flattened stem with fleshy leaves
ex. Onion, tulip
Corm – entire structure is a stem, no leaves
ex. Gladiolus
Rhizome – thick underground stem that lies horizontally
ex. Hostas
Stolon – horizontal stem that lies above ground
ex. Strawberries
Tuber – rhizome with a swollen tip to store food
ex. Potatoes Leaves Functions - Leaves are the primary food-producing organs of the plant

- Collect light and use that energy to produce food Parts of the Leaf - Leaf blade – large, broad flat surface that collects sunlight

- Petiole – leaf stem that holds the leaf

Helps transport water and sugar

- Midrib – the main vein of the leaf - Margin – the outline of the leaf

- Tip – top of the leaf opposite the petiole

- Veins – transport in the leaf

- Base – bottom of the leaf near the attachment to the petiole Veins - Parallel veins – none of the veins cross
Found in monocots
Corn, grass
-Netted veins – connect and branch from one another
Pinnate – branch out from midrib
Palmate – branch out from petiole Types of Leaves - Simple leaf – only one blade on its petiole
- Compound leaf – multiple blades
Pinnate – multiple attachment points to the petiole
Palmate - all of the leaflets are attached at a common point Opposite – leaves arranged directly across from one another
Alternate – spaced along the stem in an alternating fashion
Whorled – three or more leaves are attached to a single node Leaf Arrangements
Full transcript