Plant Reproduction. Zygote (2n) M I T O S S I M E I O S S I Seed (disperses via wind or animals)...
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Transcript of Plant Reproduction. Zygote (2n) M I T O S S I M E I O S S I Seed (disperses via wind or animals)...
![Page 1: Plant Reproduction. Zygote (2n) M I T O S S I M E I O S S I Seed (disperses via wind or animals) Developing sporophyte Mature sporophyte flower (2n)](https://reader030.fdocuments.us/reader030/viewer/2022032703/56649d095503460f949db5b8/html5/thumbnails/1.jpg)
Plant Reproduction
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Zygote(2n)
MITOS SIMEIOS SI
Seed (dispersesvia wind or animals)
Developingsporophyte
Maturesporophyteflower (2n)
Bottom ofcarpel Megasporangium
Nutritive tissue (3n)
Embryo (2n)
Endosperm (3n)forms nutritivetissue in seed
Megaspore(n: retainedin ovary)
Ovary
MITOS SI
DOU
BL E
FERTILI
ZATI
ON
EggFemale gametophyte(n: retained in ovary)
Pollen grain(male gametophyte)
Microspore (n)forms pollen grain
SSIOTIMM SSIOIE
Ovule
Top ofstamen
Anther
POLLINATION
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stigma
style
ovary
ovule
megasporocyte
micropyle
The carpel
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Creation of the megaspore
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megaspore
Creation of the megaspore
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Creation of the female gametophyte
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Polarnuclei
Eggnucleus
Creation of the female gametophyte
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Polarnuclei
Eggcell
Mature female gametophyte = embryo sac
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Review:
Megasporocyte(2N)
Megaspore(N)
meiosis
Megaspore(N)
Female gametophyte(N)
Mitosis and rearrangement
Female gametophyte contains the egg cell
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Stamen
anther
filament
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Pollen sac
Cross section of an anther
microsporocyte
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Creation of microspores
microspore
microsporocyte
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microsporocyte microsporemeiosis
Creation of microspores
Review:
Next step: creation of male gametophyte
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exine
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Pollen grain
Generative cellTube cellnucleus
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pollination
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Tube nucleus
Generativenucleus
Pollen germination
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Tube nucleus
sperm
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sperm
Tube nucleus
MatureMale gametophyte
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Review:
microsporocyte(2N)
microspore(N)
meiosis
microspore(N)
Male gametophyte(N)
Mitosis and rearrangement
Male gametophyte contains the sperm
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Polarnuclei
Eggcell
sperm
Tube nucleus
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Polarnuclei
Eggcell
sperm
Tube nucleus
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Polarnuclei
Eggcell
2N
Zygote
3N
Primaryendospermnucleus
Double Fertilization
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endosperm
embryo
Seed coat
fruit
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Bean seed(typical eudicot)
Corn seed(typical monocot)
Seed coat
Endosperm
Cotyledons
Embryonicstem and root
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