Plant Reproduction: Pollination and germination LO: to explain pollination and reproduction - To make model pollen TASK: Copy and label this diagram in your books Flowering open video

Structure and function of the flower stigma style ovary ovule carpel anther filament stamen petal sepal receptacle peduncle Flower Structure Pollination Fertilisation Seed Dispersal Germination Test

Pollination is the transfer of pollen from the anther to the stigma This is an example of cross-pollination as the pollen travels from one flower to a different flower. This is desirable in plants as it promotes variation. Flower Structure Pollination Fertilisation Seed Dispersal Germination Test

Discuss with your partner, what must a flower have to a transfer pollen by wind.

Discuss with your partner, what must a flower have to attract insects/birds for pollination Bees pollinating

Once pollination occurs a tube grows from the pollen grain down through the style to the ovule Flower Structure Pollination Fruit Development Seed Dispersal Germination Test stigma style ovary ovule carpel Note: Petals not shown in order to simplify diagram

Fertilisation occurs when the male gamete fuses with the ovule (the female gamete) Flower Structure Pollination Fruit Development Seed Dispersal Germination Test

TASK: Design whether your male plant gamete ( sex cell) will be insect or wind polinated. Then make a “sticky” pollen grain or light wind pollinated sex cell

Each pupil Makes plasticine pollen (can discuss dispersal as they make spiky, smooth etc pollen grains), then make stigma out of plasticine. Show first, then do as a class.... Here comes the pollen.... (swoop pollen towards stigma) Pollen 'sticks' onto stigma Much hilarity as kids try to make their pollen bury itself in the stigma (making a pollen tube Big bang as pollen in pollen tube reaches egg Kids curl up as embryo plant in seed And leap out of their seats (noisily) in the manner of music and movement..and becomes a new PLANT!!