AEBI 210 Lecture Notes - Accessory Fruit, Multiple Fruit, Drupe
8 Jan 2013
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Document Summary
The ovary matures into fruit, while the ovules become seeds after fertilization. Aggregate fruit or berries come from separate ovaries in one flower. Accessory fruit has some tissue derived from a tissue other than the ovary. The further seeds are dispersed, the more a population will grow. Competition is reduced the farther away seeds are from the parent plant. Animals should be discouraged from ingesting the seeds. Seeds are dispersed by wind, animals, water, and by splitting open forcefully. Wind disperses seeds that are small, light, dry and wing-like (pine, maple) Water disperses small, hard, dry seeds that float until they reach shore (bean) Seeds get stuck to animal fur, and are carried far from the parent plant (cockle bur) Dwarf mistletoe seeds shoot out at 100km/h, touch-me-not pods spring seeds away. Secondary metabolites to protect against herbivores have been evolved in angiosperms. Can have different types of photosynthesis and be autotrophic or heterotrophic.
