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)...
Plant Reproduction
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
stigma
style
ovary
ovule
megasporocyte
micropyle
The carpel
Creation of the megaspore
megaspore
Creation of the megaspore
Creation of the female gametophyte
Polarnuclei
Eggnucleus
Creation of the female gametophyte
Polarnuclei
Eggcell
Mature female gametophyte = embryo sac
Review:
Megasporocyte(2N)
Megaspore(N)
meiosis
Megaspore(N)
Female gametophyte(N)
Mitosis and rearrangement
Female gametophyte contains the egg cell
Stamen
anther
filament
Pollen sac
Cross section of an anther
microsporocyte
Creation of microspores
microspore
microsporocyte
microsporocyte microsporemeiosis
Creation of microspores
Review:
Next step: creation of male gametophyte
exine
Pollen grain
Generative cellTube cellnucleus
pollination
Tube nucleus
Generativenucleus
Pollen germination
Tube nucleus
sperm
sperm
Tube nucleus
MatureMale gametophyte
Review:
microsporocyte(2N)
microspore(N)
meiosis
microspore(N)
Male gametophyte(N)
Mitosis and rearrangement
Male gametophyte contains the sperm
Polarnuclei
Eggcell
sperm
Tube nucleus
Polarnuclei
Eggcell
sperm
Tube nucleus
Polarnuclei
Eggcell
2N
Zygote
3N
Primaryendospermnucleus
Double Fertilization
endosperm
embryo
Seed coat
fruit
Bean seed(typical eudicot)
Corn seed(typical monocot)
Seed coat
Endosperm
Cotyledons
Embryonicstem and root