Lecture 17, Ch. 38

The seed s s s s s s s s s from fertilized ovule the

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Unformatted text preview: s s From fertilized ovule..... The mature seed: seed coat (protection) cotyledons (seed leaves) hypocotyl (lower embryonic axis) radicle (embryonic root) epicotyl (upper embryonic axis) plummule (shoot tip) coleoptile (sheath for embryonic shoot) Seed development QuickTimed and a Cinepak decompressor are needed to see this picture. The fruit s s s s s s s From ovary.... Fruit protects seeds and aids in their dispersal Pericarp (thickened wall of fruit from ovary wall) Fruit types: simple (1 ovary/1 flower)~ cherry, soybean aggregate (1 flower with many carpels/ovaries)~ blackberry multiple (inflorescence; group of flowers/ovaries) ~ pineapple Fruit development QuickTime and a Cinepak decompressor are needed to see this picture. Seed germination s s s s Seed dormancy (low metabolic rate and growth suspension) Imbibition (uptake of water) Radicle 1st, then shoot tip (hypocotyl); stimulated by light Germination...
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This note was uploaded on 09/22/2009 for the course BIOL BIOL 51 taught by Professor Janetkoprivnikar during the Spring '08 term at Pacific.

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