1 / 17

REPRODUCING PLANTS

REPRODUCING PLANTS. CHAPTER 8 AGRISCIENCE AND TECHNOLOGY. Modified by Georgia Agricultural Education Curriculum Office . July, 2002. TYPES OF PLANT REPRODUCTION.

niesha
Download Presentation

REPRODUCING PLANTS

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. REPRODUCING PLANTS CHAPTER 8 AGRISCIENCE AND TECHNOLOGY Modified by Georgia Agricultural Education Curriculum Office July, 2002

  2. TYPES OF PLANT REPRODUCTION • SEXUAL REPRODUCTION - Involves using seed to propagate plants. Flowers are important because they contain the reproductive organs. • ASEXUAL REPRODUCTION - Involves reproducing plants by using vegetative parts of the plant. Results in clones (genetically like their parents).

  3. KINDS OF SEED • MONOCOT - Plants having seed with one seed leaf, known as a cotyledon. Examples are corn, wheat, rice and all grasses. • DICOT - Plants that have seed with two cotyledon. Examples are tomatoes, beans, petunias and carnations.

  4. PARTS OF A BEAN SEED • EXTERNAL • Seed coat - Outer covering of the seed • Hilum - Where the seed was attached in the pod. • Micropyle - Tiny opening near the seed scar where the pollen entered the ovule to form the seed.

  5. PARTS OF A BEAN SEED • INTERNAL: • Cotyledons - Bean seed has two; contain food for the embro. • Radicle - Becomes the root system of the plant. • Hypocotyl - Connects the radicle and the cotyledons. • Epicotyl - Forms the stem of the plant. • Plumule - Develops the above-ground part of the plant (embryonic leaves).

  6. PARTS OF A MONOCOT SEED: CORN • EXTERNAL: • Seed coat - Protects the embryo. • Seed scar - Where the corn grain was attached to the cob. • Silk scar - Opposite side of the grain from the seed scar.

  7. PARTS OF A MONOCOT SEED : CORN • INTERNAL : • Endosperm - Where the food is stored for the embyo. • Radicle - Becomes the root system. • Hypocotyl - Connects the radicle with the food source. • Epicotyl - Forms the stem. • Cotyledon - Does not store food; absorbs food from the endosperm. • Plumule - Develops into leaves.

  8. PARTS OF A COMPLETE FLOWER • Sepals - Outer part of the flower; covers the bud and protects it as it develops. • Petals - Located just inside the sepals; attract insects which help with the fertilization process. • Stamens - Male part of the flower; contains an anther that produces pollen, or sperm. • Pistil - Female part of the flower; contains the stigma

  9. FLOWERS • PERFECT FLOWERS - Contain the stamen and pistil in the same flower. • IMPERFECT FLOWERS - Flowers that lack either the stamen or pistil. • Exception: Monoecious plants may have both male and female imperfect flowers on them. Corn is an example.

  10. POLLINATION • Transfer of pollen from an anther to a stigma of a flower of the same species. • Pollen may be moved by wind, insects, birds and other natural means. • Cross-pollination - When two different plants are involved. • Self-pollination - Involves flowers on the same plant.

  11. TYPES OF FRUIT • FLESHY FRUIT - Have large fibrous structures surrounding the seed; apples, pears, blackberries, oranges and grapes are examples. • DRY FRUIT - Fruit develops as a pod or in a hull; beans, peas, peanuts and cotton are examples of dry fruit. Pecans, acorns, corn, oats, wheat, elm trees are examples of hulls.

  12. GERMINATION TESTING • When a number of seeds sprout out of a set amount is called a germination test. • Helps in determining the number of seeds to plant. • Soil is the most widely growing medium; however greenhouses usually use “artificial” media.

  13. CONDITIONS FOR SEED GERMINATION • MUST HAVE THE FOLLOWING: • MOISTURE • TEMPERATURE • OXYGEN

  14. BENEFITS OF VEGETATIVE PROPAGATION • True traits of parents - Assures that the new plant is identical to its parents. • No seed - Some plants do not produce seed: an example is seedless grapes.

  15. EXAMPLES OF VEGETATIVE PROPAGATION USING BELOW GROUND PARTS • Potatoes are cut into sections with buds (eyes) and planted. • Bulbs or corms are planted; multiply and new bulbs are pulled apart and planted separately.

  16. METHODS OF ABOVE GROUND PROPAGATION • LAYERING - Involves getting roots to grow from the stems of plants • CUTTING - Involves using a short section of plant stem for propagation. • BUDDING - Involves taking a bud from one plant and moving it to another. • GRAFTING - Involves placing a section of the stem of one plant onto another plant.

  17. QUALITIES OF GOOD SEED • Purity - Contains only seed intended. • Contamination - Free of trash • Percent germination - Should be 90-100 % • Uniformity - Same size and shape • Damage - Seed coats should not be cracked • Free of disease - Healthy • Treatment - Treated to prevent disease • Reputation of grower and dealer

More Related