Seeds What are seeds? Original Power Point Created by Darrin Holle Modified by Georgia Agricultural Education Curriculum Office June 2002

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