Fertilisation in plants Learning objectives Define fertilisation Describe

Fertilisation in plants Learning objectives: • Define fertilisation • Describe the role of a pollen tube in plant fertilisation

Fertilisation Task 1: Define fertilisation

Fertilisation Task 1: Define fertilisation Fertilisation is the fusion of a male (pollen in plants) and female (ovule in plants) gamete to produce a zygote that undergoes cell division and develops into an embryo. It is part of sexual reproduction.

Fertilisation in plants Step 1: Pollination occurs – either by wind or insects.

Fertilisation in plants Step 2: Pollen lands on stigma and grows a pollen tube down the style using digestive enzymes. The pollen tube grows towards the ovary and enters the ovule via an opening known as a micropyle.

Fertilisation in plants Step 3: The nucleus of the pollen grain passes down the pollen tube to fertilise the egg cell inside the ovule.

Fertilisation in plants Step 4: The fertilised egg develops into an embryo. The ovule becomes the seed and the ovary becomes the fruit.

Fertilisation in plants Task 2: Draw a cycle diagram to summarise fertilisation in plants.

Fertilisation in plants Task 3: Follow instructions on worksheet to observe the growth of pollen tubes

Thumbs up or down Learning objectives: • Define fertilisation • Describe the role of a pollen tube in plant fertilisation