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The pieces and parts of a plant

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Presentation on theme: "The pieces and parts of a plant"— Presentation transcript:

1 The pieces and parts of a plant
Plant Structures The pieces and parts of a plant

2 Roots Root Systems Taproots
The root system under the ground often takes up more space underground then the plant above ground. Root systems are either taproot or fibrous Taproots Main root that grows straight down from the stem Thick, heavy root that does not have many side or lateral branches. Often used for human and animal consumption Examples: Sugar Beets, carrots, radishes

3 Fibrous Roots Adventitious Roots Root Cap
Taproots have the ability to survive periods of drought. They grow deep and have fine secondary roots and do not stabilize the soil well. Fibrous Roots Generally thin, somewhat hair like and numerous. Normally very shallow Examples: grasses, corn and begonias Many small, thin branched roots that hold soil together well, but dry out quickly. Adventitious Roots Roots that grow above ground that help support a plant, cause it to grow up walls and trees. Root Cap Protects the tender growing tip of the root as it pushes through the soil.

4 Stems First thing you see when you look at a plant
Stems support the leaves, flowers and fruit Woody Made of tough material Often covered with bark Herbaceous Succulent and somewhat tender Usually do not survive cold climates Modified Stems Stems that grow along the ground or even underground. Stems that have specialized jobs to perform

5 Bulbs Short stems Surrounded by modified leaves called scales Examples: Easter Lilies and Onions Corms Thickened, compact, fleshy stems Examples: Glads Rhizomes: thick stems that run below the ground Examples: Iris and Johnson Grass Tubers Thick, underground stems that store carbohydrates Often these are food. Potato General Parts Same internal parts as roots Xylem and Phloem continue from root system

6 Stem Parts Node Internode Axil Lenticels Terminal Bud
Portion of the stem that is swollen or slightly enlarged where buds and leaves start. Internode Area between nodes Axil Angle above a leaf or flower stem and the stalk This is where the axillary buds grows from Axillary buds turn into leaves or branches Lenticels Pores in the stem that allow gases in and out of plant Terminal Bud Located at top of stem or branches Vegetative bud: produces stem and leaf growth Flowering Bud: produces flowers

7 Leaves Leaves manufacture food for the plant
Capable of adjusting angle to sun Allow for maximum sunlight exposure This process is called phototropism Leaf Margins The edges of leaves How plants are identified Leaf Shape and Form Vary according to species Shape and form used for plant identification Types of Leaves Simple Leaf-single leaf from stem Compound Leaf-two or more leaves from single point

8 Leaf Parts Internal Structure Leaf Blade Petiole
Wide Portion Many shapes and sizes Petiole The stem of the leaf Almost absent or very long Internal Structure The leaf is the site of photosynthesis Cuticle: waxy protective covering of leaf Epidermis: Skin of the leaf Chloroplast: contains the chlorophyll Stomas: Pores in underside of leaf Guard Cells: Allow pores to open and close Xylem and Phloem continue into leaves

9 Flowers Flowers are appreciated for their beauty or fruit
A flower’s primary function is to produce seeds Flower Structure Male Parts-Stamen Filament-supports the anther Anther-manufactures the pollen Pollen-male sexual reproductive cell Female Parts-Pistil Stigma-receives the pollen Style-connects the stigma to the ovary Ovary-contains the ovules (eggs)

10 Perfect Flower Pollination Petals Sepals Calyx Fruit
Contains male and female parts Imperfect flowers have one or more missing parts Pollination Union of the pollen with the stigma Petals Colored to attract insects and birds for pollination Sepals Protective unit for flower Calyx What the sepal collectively are called Fruit Ripening seed in the pistil Pistil enlarges into fruit


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