Evolution of plants and non vascular
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Transcript of Evolution of plants and non vascular
9/24/13
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EVOLUTION OF PLANTS
OBICO JJA, Instructor Department of Biology
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Elodea (Hydrocharitaceae - Alismatales)
cell wall
chloroplasts
thylakoids
stroma
granum
chloroplast: chlorophyll a & b grana starch
amyloplasts (starch grains): alpha-1,4-glucopyranoside
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HAPLOID (n)Multicelled Stage
(Adu lt)
Egg (n )
Sperm (n)
Zygote
(2n )
Spores(n)
mitosis
fertilization
HAPLONTICOogamy
meiosis
HAPLOID (n)Multicelled Stage
(Adu lt)
Gamete(n)
Zygote
(2n )
Spores(n)
mitosis
fertilization
HAPLONTICIsogamy
meiosis
Gamete(n)
A B
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cell wall: cellulosic plasmodesmata (in some Green Plants)
cellulosic cell wall
plasmodesmatamiddle lamella
CELL #1 CELL #2
plasmamembrane
The Land Plants =Embryophyta (embryophytes)
} The first colonization of plants on land during the Silurian period, ca. 400 million years ago.
} Land Plants now dominate the earth.
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GAMETOPHYTE(n)
Egg (n)
Sperm (n)
Zygote
(2n)
HAPLODIPLONTIC("Alternation ofGenerations")
SPOROPHYTE(2n)
Embryo(2n)
Spores(n)
lost by reduction and modificationin the Angiospermsand some Gnetales
Sporangium(2n)
Archegonium(n)
Antheridium(n)
fertilization
mitosismitosis
meiosis
mitosis
}(Sperm non-flagellate in Conifers, Gnetales, and Angiosperms)
Sporocyte(2n)
produce
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calyptraoperculum
peristometooth
mature capsule(sporangium)
spores
gametophyte(n)
sporophyte(2n)
antheridia
archegonia
costa
germinatingspore
protonema
embryo(2n)
operculum
peristome teeth
archegonialneck
GAMETOPHYTE(n)
Egg (n)
Sperm (n)
Zygote
(2n)
HAPLODIPLONTIC("Alternation ofGenerations")
SPOROPHYTE(2n)
Embryo(2n)
Spores(n)
lost by reduction and modificationin the Angiospermsand some Gnetales
Sporangium(2n)
Archegonium(n)
Antheridium(n)
fertilization
mitosismitosis
meiosis
mitosis
}(Sperm non-flagellate in Conifers, Gnetales, and Angiosperms)
Sporocyte(2n)
produce
9/24/13
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calyptraoperculum
peristometooth
mature capsule(sporangium)
spores
gametophyte(n)
sporophyte(2n)
antheridia
archegonia
costa
germinatingspore
protonema
embryo(2n)
operculum
peristome teeth
archegonialneck
calyptraoperculum
peristometooth
mature capsule(sporangium)
spores
gametophyte(n)
sporophyte(2n)
antheridia
archegonia
costa
germinatingspore
protonema
embryo(2n)
operculum
peristome teeth
archegonialneck
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spore (n) protonema gametophyte (n)
archegonium antheridium
fertilization
spore (n) protonema gametophyte (n)
archegonium antheridium sporophyte (2n)
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fertilization
meiosis spore
(n) protonema gametophyte (n)
archegonium antheridium sporophyte (2n)