Reproduction in Plants

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Reproduction in plants

Fun facts!

■The world's biggest seed is the coco-de-mer nut, which can weigh up to 20kg (45lb).

•Butterflies attach their eggs to leaves with a special glue

•Butterflies taste food by standing on top of it! Their taste receptors are in their feet unlike humans who have most on their tongue

•One bushel of corn will sweeten more than 400 cans of pop.

•Onions contain a mild antibiotic that fights infections, soothes burns, tames bee stings and relieves the itch of athletes foot.

•Asparagus is a member of the lily family, which also includes onions, leeks, and garlic

•Arrowroot, an antidote for poisoned arrows, is used as a thickener in cooking (so if you ever get shot with a poison arrow, do not go to a doctor, look in your kitchen cabinet.

Male Parts

Anther

Storing and producing pollen

Filament

Supports the anther

Female Parts

Ovary

Responsible for housing the eggs

Style

Supports the stigma

Stigma

Captures the pollen

Main topic

Stages:

Germination

Means to sprout or grow

Only possible if the seed lands in a place with sufficient air, water and the right temperature.

Dispersal

Juicy or frangrant

e.g. hibiscus

Dry and light/ Wing-like structures or hairs

e.g. Dandelion

Splitting

Ripen, dry up and split open

e.g. rubber tree

Water

e.g. coconut tree

Waterproof covering/Fibrous husk

Fertlisation

Step 1: Upon landing on the stigma, each pollen grain produces a tube that grows down the style to the ovules in the ovary.

Step 2: When the pollen tube reaches the ovule, fertilisation takes place.

Meeting of the male reproductive cell and the female reproductive cell.

Process

Formation of fruit and seeds

1) Petals will wither and drop off

2) Ovary swollens and develops into a fruit

3) The ovules become seeds

Pollination

Wind

Feathery stigmas

Small and dull petals, no sweet smell nor nectar

Animals

Insects/ small animals

Petals must be colourful, big, bright, have a pleasant smell and nectar

Pollen grains are usually sticky so as to stick onto the insect's body