Plant parts 1

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Transcript Plant parts 1

Sarah Lomanto
AgEd 410
Cal Poly-SLO
Parts of a Plant
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Roots
Leaves
Stems
Fruit
Flowers
Diagram of Plant Parts
Root Systems
Two
Basic Types of Root Systems
Fibrous-
The roots branch from the
bottom of the plant (corn and beans)
Taproot- A long
tapering root
(carrots and dandelions)
Parts of Root Systems
• Root Hairs- involved in absorption of
nutrients from the soil
• Root Cap & Meristem- conducting
tissue, involved in conducting moisture
& nutrients to the plant
Types of Leaves
• Simple leaves
• Compound leaves
• Needle leaves
Leaves
• Food manufacturing factory of the
plant which performs Photosynthesis
and contains the green pigment,
Chlorophyll
Leaves Also...
• Capture solar energy, which is
converted into chemical energy in the
form of sugars and starch and is
transferred up the food chain
Parts of Leaves
• Stomata- small openings in the leaf
that help cool the plant through
Transpiration
• Blade- main body of the plant
• Petiole- small stem which attaches the
blade to the main plant stem
More Parts of Leaves
• Midrib- large central vein down the
middle of the leaf
• Apex- tip of the leaf
• Base- bottom of the leaf & attaches to
the petiole
• Margin- edge of the leaf
Different Types of Leaves
• Can you identify the parts we
discussed on these different types of
leaves?
Stems
• Central support structure of the plant
• Contain buds which are found in the
area referred to as the node
External Anatomy of Stems
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Internodes- Areas between the buds
Bark Lenticels
Leaf Scars
Scale Scars
Internal Anatomy of Stems
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Xylem
Phloem
Cambium
Sapwood
Heartwood
Pith
Stem Anatomy of Herbacious
Plants
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Epidermis
Cortex
Pith
Vascular Bundles
Fruit
• Ripened ovule or egg
• In most plants the ovule or egg is
fertilized by the sperm (the pollen) and
the ovary matures into the fruit
• Fruit are usually classified by their
structure and number of ovules
Simple Fruits
• Develop from a simple ovary
• Can be fleshy or dry
Fleshy Simple Fruit
• Classified as a “Drupe” or “Pome”
• A drupe has a stone in the center of the fruit
which is the seed
• A pome has several seeds, usually in a
chamber
Dry Simple Fruit
Classified in two categories
Indehiscent
Dehiscen
t
More Fruit Classifications
• Aggregate fruits are developed from a
single flower with many ovaries
• Multiple fruit have flowers that are
separated but closely clustered
Flowers
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Four main parts
Sepals
Petals
Stamens
Pistils
Flower Classification
• Complete- has all four main parts
• Incomplete- missing any of the four
primary parts
• Perfect- has both a pistil and a stamen
(the female and male reproductive
structures)
• Imperfect- missing the stamen or pistil
The Pistil
• Female reproductive structure and has
three primary parts
• Stigma- pollen collecting structure,
located at the top of the pistil
• Style- support structure below the
stigma
• Ovary- enlarged portion which
contains ovules or eggs
The Stamen
• Male reproductive structure usually
surrounding the pistil
• Anther- pollen bearing structure
• Filament- acts as a stalk to support the
anther