Presentation on theme: "PLANT STRUCTURE AND FUNCTION. IS IT A STEM, LEAF, ROOT, FLOWER, FRUIT OR SEED? Food Part of Plant Broccoli Cabbage Carrot Celery Stalk Corn Kernel Garlic."— Presentation transcript:
PLANT STRUCTURE AND FUNCTION
IS IT A STEM, LEAF, ROOT, FLOWER, FRUIT OR SEED? Food Part of Plant Broccoli Cabbage Carrot Celery Stalk Corn Kernel Garlic Onion Potato Tomato Zucchini
IS IT A STEM, LEAF, ROOT, FLOWER, FRUIT OR SEED? Food Part of Plant BroccoliFlower CabbageFlower CarrotRoot Celery Stalk Stem Corn Kernel Seed GarlicRoot OnionRoot PotatoRoot TomatoFruit ZucchiniFruit
PLANT BODY Shoot system = leaves + stem Root system
THREE TYPES OF PLANT TISSUES Vascular Tissue Transport Support Ground Tissue Synthesis of Sugars Storage Support Dermal Tissue Protection
PLANT BODY Functions Exposes surface to sunlight Major site of photosynthesis Conserves water Provides for gas exchangeBlade Petiole Leaf = blade + petiole Stoma = opening in the leaf for gas exchange, water evaporation
STRUCTURES OF THE LEAF Photosynthesis Conserves water Transports water and sugar to stem and roots
PLANT BODY Stem: series of nodes and internodes Functions Holds leaves up to light Transports substances through vascular tissue Xylem conducts water and minerals Phloem transports sugar
PLANT BODY Root Functions Anchors plant in soil Takes up water and minerals from soil
FLOWERING PLANT REPRODUCTION Flowers are modified leaves, specialized for reproduction. Pollen grains Ovule Flower Meiosis Mitosis
Angiosperms are seed bearing & fruit producing or flowering plants.
Flowers Come in many different shapes, sizes and colors, but they all have the same functions: help plants reproduce. where seeds are made.
Flowers are the sexual reproductive organs of plants. All flowers, regardless of variety, have the function of seed formation and the production of more plants. Flowers contain both non-reproductive and reproductive structures.
THE PARTS OF A FLOWER Most flowers have four parts: sepals, petals, stamens, carpels.
THE PARTS OF A FLOWER Sepals protect the bud until it opens. Petals attract insects. Stamens make pollen. Carpels grow into fruits which contain the seeds.
Anther This is the part of the stamen that produces and contains pollen. It is usually on top of a long stalk that looks like a fine hair. When the grains are fully grown, the anther splits open. Male Parts Draw and label this sketch in your notes.
Filament This is the fine hair-like stalk that the anther sits on top of. The part of a stamen that supports the anther of a flower (the stalk of the stamen). Male Parts Draw and label this sketch in your notes.
Stamen This is the male part of the flower. It is made up of the filament and anther, it is the pollen producing part of the plant. The number of stamen is usually the same as the number of petals. Male Parts Draw and label this sketch in your notes.
Female Parts Stigma The sticky surface at the top of the pistil. It traps and holds the pollen and starts the fertilization process.
Female Parts Style The tube-like structure that holds up the stigma.
Female Parts Ovary The part of a plant, usually at the base of the flower, that has the seeds inside and turns into the fruit that we eat.
Ovule The structure in a flower that develops into a seed when fertilized.(egg s) Female Parts
Carpel/Pistil The carpel is the female reproductive organ of a flower. It makes the seeds. It is made up of the stigma, style, and ovary. There may be more than one carpel in a flower. Female Parts
Pollen - powdery grains that contain the male reproductive cells of most plants. Pollen is produced by the anthers.
POLLINATION Flowering plants use the wind, insects, bats, birds and mammals to transfer pollen.
When pollination occurs, pollen moves from the male parts to the female parts. Pollen grains land on the stigma and a tiny tube grows from it and down the style into the ovary.
The fertilized ovule becomes the seed and the ovary becomes the fruit.
Pollen is the powdery grains that contain male reproductive cells of most plants produced by anther. Flowering plants use the wind, insects bats, birds and mammals to transfer pollen, When pollination occurs, pollen moves from the male parts to the female parts
. Pollen grains land on the stigma and a tiny tube grows from it and down the style into the ovary. The fertilized ovule becomes the seed and the ovary become the fruit.
Pollen grains land on the stigma and a tiny tube grows from it and down the style into the ovary. The fertilized ovule becomes the seed and the ovary become the fruit.
A COMPLETE FLOWER HAS BOTH MALE AND FEMALE PARTS Sepal Petal Ovary Style Stigma PistilPistil Anther Filament StamenStamen Encloses and Protects Bud Attracts pollinator Male part Female part Produces egg Produces pollen
Mature Pollen Grain POLLINATIO N AND FERTILIZATIO N IN A FLOWER Tube Cell Nucleus Sperm Cells 1.pollen grains land on stigma Stigma Style Ovary 2.pollen tubes grow down stigma to ovary Sperm Egg 3A: Fusion of sperm + egg 3B: Fusion of 2 nd sperm + two polar nuclei 3.double fertilization Polar nuclei Ovule
DEVELOPMENT OF FRUIT AND SEEDS FROM FLOWER PARTS TriploidEndospermCell Triploid Endosperm Cell Ovary Ovary Integument Integument Diploid Zygote Diploid Zygote EndospermEndosperm Fresh Fruit Seed Coat Embryo (new plant) Seed = embryo + stored food + seed coat Fruit = ovary wall, mechanism for seed dispersal Provides nutrition