BY5.3 Seed Development and Germination

Development of seed and fruit:

• occurs following fertilisation
• seed develops from fertilised ovule and contains embryonic plant and food store

• diploid zygote divides by mitosis to from teh embryo
• embryo has a plumule (developing shoot) and radicle (developing root) and cotyledons
• food store develops to feed the developing embryo
• ovary becomes the fruit
• ovule becomes the seed

Seed structure:

• flowering plants are either mono or dicotyledons
• monocotyledons include cereals and maize
• dicotyledons include broad beans

• in broad beans, the food store is absorbed into the cotyledons
• in maize, the food store surrounds the leaves

Germination:

3 requirements for successful germination

• suitable temperature:
  • optimum temperature for…