9Parts of the Seed Seeds are made up of 3 main parts…. Seed Coat. Endosperm.Embryonic Plant.
10Planting Seeds Planting depth depends on the size of the seeds. The larger the seed, the deeper it is planted.Example: Petunia seeds are planted shallower than beans, tomatoes, or marigolds because they are the smallest.Small seeds should be watered by bottom soaking.
11Planting SeedsSeeds are directly seeded when they are planted in the soil where they will grow to a saleable size.Germination flats are used if they are to be transplanted at a later time.When reusing germination flats, be sure to sterilize the flats and soil.
12Germination Germination rate is the % that sprout. Rates affected by…. Example: 75 out of 100 = 75%Rates affected by….Seed viability.Temperature.Moisture.Type of plant.Quality of seed.
30GraftingJoining separate plant parts together so that they form a union and grow together to make one plant.ScionPiece of plant at the top of the graft.RootstockThe piece of the plant at the root or bottom of the graft.
31Grafting Methods Scion & rootstock are the same size: Wedge Splice Whip & tongueApproach
39Tissue Culture Must have a sterile environment. Get the most plants in a short time.True to parent plants.
40Advantages to Asexual Propagation Plants mature in shorter time.Some plants do not produce viable seeds.New plants are same as parent plant.
41Disadvantages to Asexual Propagation Some methods require special equipment & skills….Such as grafting.Cuttings detach plant parts from water and nutrient source.Some plants are patented….Making propagation illegal.
43What is Biotechnology?The use of cells or components (parts) of cells to produce or processes.
44Methods of Biotechnology Tissue CultureAlso called micropropagation.Uses the terminal shoots or leaf buds in a sterile or aseptic environment on agar gel or other nutrient-growing media to produce thousands of identical plants.
45Methods of Biotechnology CloningGenetically generating offspring from non-sexual tissue.
46Methods of Biotechnology Genetic EngineeringMovement of genetic information in the form of genes from one cell to another cell to modify or change the genetic make-up.
47Benefits of Biotechnology Produce many identical plants in a short time.Increase disease and insect resistance.Increase tolerance to heat or cold.Increase weed tolerance.Increase tolerance to drought.Improve environment.Increase production.Other genetic changes.
48Designed By:Johnny M. Jessup; FFA AdvisorHobbton High School