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Lesson 1 Examining Parts of a Flower Slide 2 Terms Anther Anthesis Complete flower Dicot Fertilization Filament Flower Imperfect flower Incomplete flower Monocot Ovaries Ovule Perfect flower Petal Photoperiodism Phytochrome Pistil Pistillate flower Slide 3 Terms cont. Pollen Pollination Sepal Stamen Staminate flower Stigma Style Vernalization Slide 4 Parts of a Flower Flower - reproductive part of flowering plants Slide 5 Parts of a Flower cont Sepals - green-like structures beneath the petals; offer protection to developing bud Sepal Slide 6 Sepals Slide 7 Parts of a Flower cont Petals - usually brightly colored; attract pollinators Petal Slide 8 Petals Slide 9 Parts of a Flower cont Stamens - male reproductive part of flower Stamen Slide 10 Parts of a Flower cont Pistil - female reproductive part of the flower Pistil Slide 11 The pistil contains the stigma, style, and ovary. Slide 12 Reproductive Structures cont Pistil Stigma - has sticky surface to capture pollen Style - tube-like; connects stigma with the ovary Ovary - contains the ovules Slide 13 Slide 14 Reproductive Structures Stamen Anther - produces the pollen Filament - stalk which supports the anther Slide 15 Stamens The stamens produce pollen and are the male parts of a flower. A stamen consists of a filament and anther, which is a knob-like structure at the end of a filament. Slide 16 Slide 17 2. Describe the types of flowers. Type of flower is based on the parts found in the flower of a particular species. Slide 18 Perfect vs. Imperfect Parts of a flower determine if it is perfect or imperfect. 1. A perfect flower has the stamen and pistil in the same flower. 2. An imperfect flower lacks either stamens or pistils. Slide 19 Complete vs. Incomplete Parts of a flower determine if it is a complete or incomplete flower. 1. A complete flower has four principal parts: sepals, petals, stamens, and pistil. 2. An incomplete flower does not have all four principal parts. Examples are wheat and oats, which do not have sepals and petals. Slide 20 Monoecious Plant species that have both male and female flowers on the same plant are known as monoecious plants. - Examples: corn, cucumber and pecan. Slide 21 Dioecious Plant species with the male flowers and female flowers on separate plants are known as dioecious plants. -Examples: holly, date, palm, ginkgo, and muscadine grape. Slide 22 Monocot vs. Dicot Monocots - flower parts in multiples of 3 Dicots - flower parts in multiples of 4 or 5 Slide 23 Pollination and Fertilization Pollination - when a pollinator transfers pollen grains from anther to stigma Fertilization - when pollen fuses with the egg cell VIDEO: Keyword: Pollen Trip; Title: The Pollen Trip Slide 24 Slide 25 Influence on Flower Formation Photoperiodism - growth response of a plant to the length of day Vernalization - process by which floral induction in some plants is promoted by exposing the plants to cool temperatures for a certain length of time Slide 26 Phytochrome - pigment in cytoplasm of green plants; associated with the absorption of light that affects growth, development, and differentiation including flowering of a plant, independent of photosynthesis Anthesis - release of pollen from the anther Slide 27 Review/Summary What are the major parts of flowers? What reproductive structures exist in the flower and what are their functions? How is a monocot flower different from a dicot flower? What is the difference between pollination and fertilization? Describe environmental factors that can influence the beginning of the flowering process.