Lecture 29 Biology 2

Lecture 29 Biology 2 - Lecture 29, Angiosperm reproduction...

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Lecture 29, Angiosperm reproduction March 21, 2008 1 Chapter 38: Angiosperm reproduction and biotechnology 1. Sexual reproduction 2. Asexual reproduction 3. Plant biotechnology Simplified Angiosperm life cycle Fig. 38.2b Sexual reproduction Complete flowers: have all four basic floral organs Incomplete flowers : lack one or more floral organs style ovary SEPAL Sexual reproduction Floral variations: Presence of parts
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Lecture 29, Angiosperm reproduction March 21, 2008 2 Floral variations: Symmetry style ovary SEPAL Sexual reproduction Fig. 38.3 • Bilateral symmetry • Radial symmetry Cattleya (orchid) Daffodil Floral variations: Ovary location style ovary SEPAL Sexual reproduction • Superior ovary : stamens, petals, and sepals attached below ovary • Inferior ovary : stamens, petals, and sepals attached above ovary Lilium Spathoglottis plicata (Ground orchid) Ovary Ovary Floral variations: Floral distribution style ovary SEPAL Sexual reproduction • Individual flower : single flower • Inflorescence : clusters of flowers Digitalis (Foxglove) Aquilegia formosa (Red columbine) Ovary Ovary
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Lecture 29, Angiosperm reproduction March 21, 2008 3 Floral variations: Reproductive structures style ovary SEPAL Sexual reproduction • Monoecious (“one house”) : unisexual reproductive units of both sexes on the same plant (“male” flowers and “female” flowers) Ovary Ovary Male Female style ovary SEPAL Sexual reproduction Ovary Ovary •Dioecious (“two houses”) : unisexual reproductive units of each sex on different plants
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This note was uploaded on 03/31/2008 for the course EBIO 1220 taught by Professor Demig-addams during the Spring '07 term at Colorado.

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Lecture 29 Biology 2 - Lecture 29, Angiosperm reproduction...

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