Week 9- Early Growth and Develp.Josh - Early Growth Development of Corn Soybean Wheat Seed Parts Dicotyledons vs Monocotyledons Crop Growth Stages 2

Week 9- Early Growth and Develp.Josh - Early Growth...

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Early Growth & Development of Corn, Soybean, & Wheat
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Crop Growth Stages 2 Seed Parts Dicotyledons vs Monocotyledons
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Crop Growth Stages 3 Dicotyledons Plants that have two cotyledons or “seed leaves” Cotyledons are the food source for the germinating legume seedling High seed quality = healthy cotyledons
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Legume Seed Seed Coat (Testa) Cotyledon Cotyledonary node Epicotyl (plumule) Hypocotyl Radicle Hilum
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Legume Emergence Radicle Hypocotyl Epicotyl forming unifoliates Cotyledonary node 2º roots 1º root Cotyledons Trifoliolates Unifoliolates Nodules Epicotyl Unifoliolates
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Soybean Germination and Emergence Hypocotyl Cotyledons Radicle
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Germination & Seedling Development
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Crop Growth Stages 9 Monocotyledons Plants that have one cotyledon Grasses, cereals Three major parts of seeds are the pericarp, endosperm, and embryo Type of fruit: Caryopsis embryo endosperm
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Crop Growth Stages 10 Monocotyledons Endosperm makes up most of seed (80%) —food source for germination. Embryo is only living part of seed. Underneath pericarp is aleurone layer: determines seed color due to protein Hard endosperm is colorless or yellow; soft endosperm is white Dent comes from shrinking of soft endosperm as it dries Scutellum/ cotyledon Embryo Endosperm Pericarp
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Corn Kernel Silk scar Pericarp Aleur. layer Soft end. Hard end. Cotyledon Coleoptile Epicotyl Cotyledonary node Radicle Coleorhiza Black layer
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Crop Growth Stages 12 Corn Germination and Emergence Iowa State University Coleoptile Radicle
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Crop Growth Stages 13 Development of Nodal Roots Mesocotyl Nodal Root Seminal Roots
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Monocot & Dicot Review
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  • Spring '08
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  • Plant morphology, Crop Growth Stages

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