Ch38_Lecture-Spr11

Ch38_Lecture-Spr11 - 38 Reproduction in Flowering Plants 38...

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Reproduction in Flowering Plants 38
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38 Reproduction in Flowering Plants 38.1 How Do Angiosperms Reproduce Sexually? 38.2 What Determines the Transition from the Vegetative to the Flowering State? 38.3 How Do Angiosperms Reproduce Asexually?
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38.1 How Do Angiosperms Reproduce Sexually? In angiosperms, flowers contain sex organs Nearly all reproduce sexually, many reproduce asexually as well Sexual reproduction produces new gene combinations and diverse phenotypes Asexual reproduction produces clones of genetically identical individuals http://www.faculty.sfasu.edu/dgravatt/sedumplant1.jpg Development of plantlets by asexual means may be an efficient mechanism of vegetative reproduction in many plants
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38.1 How Do Angiosperms Reproduce Sexually? In agriculture, both modes are important Many annual crops are grown from seeds (e.g., grains [grasses], soybean, etc.) Other crops such as strawberries, potatoes, and bananas, are produced asexually Navel oranges are seedless, and must be propagated asexually. All descend from one mutant tree www.biology.iastate.edu/Courses/202L/Ne w%20Site%20S05/27AngioReprod/reprod Stawberry plant with stolen www.hort.cornell.edu/4hplants/Fruits/Images/ Seedless navel orange
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38.1 How Do Angiosperms Reproduce Sexually? Sexual reproduction involves mitosis and meiosis and alternation of generations.
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