Seed Germination Process in Plants

Seeds What are seeds?

Basic Parts of Seeds • 1. Embryo • 2. Food Supply • 3. Ovary wall or seed coat

Germination • Needed for Germ • 1. Temperature • 2. Moisture • 3. Air • 4. Light or absence of it

Germination • Process • 1. Seed absorbs water • 2. Seeds proteins activated • 3. Radicle (root) emerges

Germination • 4. Plumule or embryonic shoot emerges • 5. Leaves form and food production begins

Monocot Seeds • 1. Seed coat-protection • 2. Endosperm- a source of energy • 3. Embryo-miniature plant that has

Monocot Seeds • 3.Embryo: • Epicotyle-shoot above cotyledon • Hypocotyl-part of stem below the cotyledon • Radicle- primary root, supports seedling

Dicot Seeds • 1. Seed Coat-protection • 2. Embryo miniature plant

Dicot Seeds • 2. Embryo- • 2 cotyledons-seed leaves • Epicotyl-true leaves • Hypocotyl-first stem, pulls seed upward • Radicle-forms roots

Monocot Germination • 1. Seed swells • 2. Radicle grows down • 3. First internode and epicotyl grows upward

Monocot Germination • 4. New leaves form and food production starts • 5. New root system develops • 6. Temporary root system ceases to function and dies

Dicot Germination • 1. Seed swells • 2. Radicle grows down • 3. Hypocotyl forms arch that breaks soil surface

Dicot Germination • 4. Hypocotyl reaches light and straightens up • 5. Cotyledons turn green and make food • 6. As new leaves develop, cotyledons dry up and fall off

Seed Germination Process in Plants

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