Parts of a Seedling

Lima beans

Lima beans have been cultivated in Peru for more than 7,000 years.

The name "Lima," comes from the capital of the South American country of Peru. Historians are unsure whether they originated there or in Guatemala.

The scientific name for lima beans is Phaseolus lunatus.

Epicotyl – contains the plumules at upper end that become part of the stem.

Why do seeds dry up, stay in their seed shape and not fall apart?

Discuss with your partner- QUIETLY!

Dry Lima Bean

observe and write down differences between the dry and wet seeds.

Dry Wet

at least 5!

• micropyle - the small pore in a seed that allows water absorption

• hilum - the scar on a seed coat at the location where it was attached to the plant's stalk during development

• Look at the exterior of the dry and wet bean seed.

• Draw and record what you see. Use your magnifying glass. Print – no cursive Pencil only Draw EXACTLY what you

see Be NEAT and DETAILED Use map pencils only to

color Spell correctly Give your drawing a title Label lines: straight and

parallel to top of page

Dry Lima Bean

hilummicropyle

Label the cotyledon, embryo (if you see one), hilum and micropyle.

Dry Lima Bean

hilummicropyle

embryonic root

cotyledon

Wet Lima Bean

Embryonic Root

embryonic root

Carefully remove the testa

(seed coat).

• Try not to separate the cotyledons

or let the embryo fall out.

Embryo

Cotyledon

Embryo

Cotyledon

You should be able to see the tiny plant embryo and its parts- the embryonic root, embryonic stem and embryonic leaves.

Carefully, slide your fingernails into the seam on the convex (rounded) side of the seam and separate the two large COTYLEDONS.

Inside of a Lima Bean

Hypocotyl Embryonic Stem

Seed coat

Embryonic Root)

Embryonic Leaves

• Use a magnifying lens to locate and observe the embryo inside the seed.

• Look for: the two cotyledons, the embryonic

leaves, the embryonic root the embryonic stem

Cotyledon

Embryonic Root

Embryonic leaves

Embryonic stem

Cotyledon

Inside a Lima Bean

Seed

Lima Bean Seed Drawings

Make sure you include the following:• Seed Coat (Testa)• Cotyledon• Embryonic Root• Embryonic leaves• embryonic stem

Inside of a Lima Bean

Cotyledons

• Embryonic Root

• Embryonic leaves

• Embryonic stem

• Seed Coat (Testa)