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Plant Reproduction:Pollination and

germination

LO: to explain pollinationand reproduction

- To make model pollen

 TASK: Copy and label this diagram inyour books

Floering open

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Structure and "unction o" the #oer

stigma

style

o!ary

o!ule

carpel

anther

$lamentstamen

petal

sepal

receptaclepeduncle

Floer Structure  %ollination Fertilisation Seed &ispersal 'ermination

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%ollination is the trans"er o" pollen"rom the anther to the stigma

•  This is an example o" cross-pollination asthe pollen tra!els "rom one #oer to adi(erent #oer) This is desirable in plants asit promotes !ariation)

Floer Structure  %ollination  Fertilisation Seed &ispersal 'ermination

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&iscuss ith your partner* hat must a

#oer ha!e to a trans"er pollen by ind)

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&iscuss ith your partner* hat must a

#oer ha!e to attract insects+birds "orpollination

,eesollinatin

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Once pollination occurs a tube gros"rom the pollen grain don through thestyle to the o!ule

Floer Structure  %ollination Fruit &e!elopment  Seed &ispersal

stigma

style

o!ary

o!ule

carpel

Note: Petals not shownin order to simplify

diagram

F tili ti h th l

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Fertilisation occurs hen the malegamete "uses ith the o!ule the"emale gamete.

Floer Structure  %ollination Fruit &e!elopment  Seed &ispersal

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 TASK:

• &esign hether your male plantgamete sex cell. ill be insect

or ind polinated)• Then make a /sticky0 pollen grain

or light ind pollinated sex cell

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• 1ach pupil 2akes plasticine pollen can discussdispersal as they make spiky* smooth etc pollengrains.* then make stigma out o" plasticine)Sho $rst* then do as a class))))

3ere comes the pollen)))) soop pollen toardsstigma.%ollen 4sticks4 onto stigma2uch hilarity as kids try to make their pollen bury itsel"in the stigma making a pollen tube

,ig bang as pollen in pollen tube reaches eggKids curl up as embryo plant in seedAnd leap out o" their seats noisily. in the manner o"music and mo!ement ))and becomes a ne %LA5T66