Download Seed Reproduction.pptx

11/18/15
SeedReproduction
SeedReproduction
• InvolvesPollenandSeeds
• Twotypes:
• Gymnosperm
• Cones(pinecones,etc.)
• Angiosperm
• Flowers(rose,lily,carnaNon,etc.)
DoNow:Discusswithapartner:
1.  ThelifecycleofaFern
2.  ThelifecycleofMoss
3.  Howdoesaplantreproduce
withoutseeds?
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PollenGrain
Pollination
• developedfromspores
• hasawater-resistantcovering
• hasgametophytepartstoproduceSPERM
• Carriedtofemaleplantsthrough:
• Gravity,wind,water,oranimals(BEES!)
• processbywhichthepollengrainsare
transferredtothefemalepartoftheplant
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Pollination
Seeds
• Oncethepollengrainreachesthefemale
partoftheplant:
• ThepollenproducesSPERM
• ThefemaleplantproducesaPOLLEN
TUBE
• Spermmovesfrompollengraintopollen
tube,andthenFERTILIZATIONoccurs
• AZerferNlizaNon,thefemalepart
developsintoaSEED.
• Seed:
• Embryo(stem,leaves,roots)
• Storedfood(providesenergyforgrowth
or________)
• ProtecNveseedcoat
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GymnospermPlants
Checkpoint:
Whatarethe
threepartsof
theseed?What
aretheyused
for?
Gymnosperm
Reproduction
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• Gymnospermseedsdevelopincones
• Pines,firs,cedars,cycads,ginkgoes
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• Femalecone:
• Spiralofwoodyscalesonashortstem.
• AtthebaseofeachscaleareTWOovules
• TheOVULEproducestheEGGS.
• Malecone:producespollengrains
• Inspring,pollenisreleased
ThePineTree
• ThePinetreeistheSPOROPHYTE
• ProducesMALEandFEMALE
cones
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PineTreeReproduction(Gymnosperm)
1.  OntheMatureSporophyte:
• Inthecones,cellsdivideby_________toproduce
thegametophyteplantstructures(ovule,pollen
grains).
2.  ThepollengrainshaveNnywingsthathelpcarryit
tothefemalecone
3.  Pollengrainreachesthefemalecone,apollen
tubegrows,aspermswimstotheeggand
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FerNlizaNonoccurs
• Cantakeupto15months
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4.  Thezygotegrowsintoanembryothrough
__________.
• EmbryoisanewimmatureSporophyteplant
5.  Eachovule(withthegrowingembryo)isthe
SEED.
• Haswings
6.  Theseedsarereleasedfromthefemalecone
andcangrowintoamaturesporophyteplant.
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AngiospermReproduction
DoNow:
Ingymnosperms:
1.  whatmakesthesperm?
2.  Theeggs?
3.  WhathappensaZerferNlizaNon?
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TheFlower
Angiosperms
• Flowers
• MOSToftheseedplantsonEarth
• Sporophyte:Producesflowersthathave
thegametophytestructuresforspermOR
eggs.
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1.  Petals
• Colorfulpartsoftheflower
2.  Sepals
• leaf/likegreenporNonthatisjustunderneath
theflower
3.  Stamen:MalereproducNveorgan
4.  Pis9l:FemaleReproducNveOrgan
• OVARY:swollenbaseofpisNlwhereovules
arefound.
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AngiospermPollination
1.  Pollengrainsfromthestamenlandonthe
sNckysNgmaofthepisNl.
2.  Thepollentubegrowsfromthepollen
graindownthroughthepisNltotheovary
(eggs).
3.  Spermtravelsdownthepollentubeand
ferNlizestheegg,developsfromzygoteto
embryo
4.  Partsoftheovulebecometheseed’scoat
andstoredfood.Theovaryandother
flowerpartswillformafruitthatsurrounds
theseed.
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