Reproduction in plants
Understandings:
• Flowering involves a change in gene expression in the shoot apex.
• The switch to flowering is a response to the length of light and dark periods in many plants.
• Flowering in so-called short-day plants such as chrysanthemums, is stimulated by long nights rather than short days.
• Application: Methods used to induce short-day plants to flower out of season.
• Flowering involves a change in gene expression in the shoot apex.
• The switch to flowering is a response to the length of light and dark periods in many plants.
• Flowering in so-called short-day plants such as chrysanthemums, is stimulated by long nights rather than short days.
• Application: Methods used to induce short-day plants to flower out of season.
Success in plant reproduction depends on pollination, fertilization and seed dispersal.
• Most flowering plants use mutualistic relationships with pollinators in sexual reproduction.
• Most flowering plants use mutualistic relationships with pollinators in sexual reproduction.
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Skill: Drawing internal structure of seeds.
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Skill: Drawing of half-views of animal-pollinated flowers.
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Skill: Design of experiments to test hypotheses about factors affecting germination. |
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The University of Göttingen, in Germany, conducted an extensive review of scientific studies from 200 countries for 115 of the leading global crops in 2005. They found that 87 of the crop plants depend to some degree upon animal pollination, including bees. This accounts for one-third of crop production globally.
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