Plant Reproduction Flowers, Fruits, and Seeds
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Transcript of Plant Reproduction Flowers, Fruits, and Seeds
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Plant ReproductionFlowers, Fruits, and Seeds
Take Notes on your Flower Anatomy Lab Handout
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Angiosperms
• Reproductive parts are contained in the FLOWER
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Flower Parts
Sepal – leaf-like appendages that protect the flower budPetal – colorful structures that attract pollinatorsAnther – forms pollen (male gamete)Stigma – Sticky top that will catch pollenOvule - eggs
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Flower PartsFilament – Holds up the antherStyle – Curved neck that connects stigma and ovaryPollen – male gameteStamen – male reproductive organFlower – reproductive organ of the plant
Add These:Pistil (aka carpal)– female reproductive organOvary – Base of organ that contains ovules (eggs),
ovary will develop into fruit, eggs will become seeds
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Flower Parts
PETALS(COROLLA)
EGGOvule
OVARY
PISTIL
STYLE
STIGMA
ANTHERFILAMENTSTAMEN
SEPALS(CALYX)
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Pollination/Fertilization
• Pollination – when pollen (sperm) is transferred from an anther to a stigma (can be from the same plant – self-pollination)
• Fertilization – when pollen on the stigma enters the ovary and combines with the ovule (egg)
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Pollinators
1. Honeybees – need a landing platform
2. Night-flying moths – need white, •very fragrant flowers
3. Flies – like rotting meat smell
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Pollinators4. Hummingbirds – like
bright colored (red or orange), tube-shaped flowers
5. Bats – like sour, musty odors (Banana tree)
6. Wind Light weight flowers, No particular color or scent.
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Seeds and Fruits
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Fruit Formation
• After the seed is fertilized, the ovary either becomes fleshy (like a fruit) or hard (as in a nut).
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Seed Dispersal
• Fruit has propellers – dispersed by wind
• Burrs, hooks – animal fur• Tasty fruit – digestive
tract of animals
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Structure of Flowers Vascular
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Seed Development
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Seeds
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Fruit Development
As angiosperm seeds mature, the ovary walls thicken to form a fruit that encloses the seeds that developed from the ovules.
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Fruit Structure
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Types of Fruits
Hip Hesperidium
Accessory
BerryPome Drupe
Caryopsis
Capsule
Pepo
Achene
Multiple Nut
Legume
Samara Schizocarp Silique Follicle
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Animal Pollination & Dispersal
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Wind Pollination & Dispersal
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Animal Pollination
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Seed Germination
Monocot
Dicot
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Plant Propagation & Agriculture
Vegetative reproduction includes the production of new plants from horizontal stems, cuttings, leaves, plantlets, and underground roots.Horticulturists use plant propagation to make many identical copies of a plant or to produce offspring from seedless plants.Most of the people of the world depend on a few crop plants, such as wheat, rice, and corn, for the bulk of their food supply.
Peanut Flower
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Okra
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Peach
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Flower Lab Clean-up
• Person 1– Rinse the slide and coverslip off and place back on paper
towel on back table– Put the razorblade back in the cardboard and hand it to
me– Throw away the flower remains
• Person 2– Put away the compound microscope
• Person 3– Put away the stereroscope
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Homework
• Study for test• Unit 9 Review Packet – due on test day• Flower lab – due on test day• Plant diagrams – due on test day