Plant evolution - PowerPoint PPT Presentation

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Plant evolution

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Plant evolution Proterozoic Green algal evolution Mid paleozoic First land plants Late paleozoic Coal forests: early vascular plants – PowerPoint PPT presentation

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Title: Plant evolution


1
Plant evolution
  • Proterozoic Green algal evolution
  • Mid paleozoic First land plants
  • Late paleozoic Coal forests early vascular
    plants
  • Latest paleozoic seed plants, early Gymnosperms
  • Mesozoic Gymnosperms (and reptiles) dominant
  • Late mesozoic first flowering plants
  • Cenozoic coevolution of flowering plants and
    insect pollinators

2
Ancestral Green Algae
Bryophytes
Ferns allies
Gymnosperms
Angiosperms
Flowers
Seeds
Overview of Plant Evolution
Vascular tissue
Embryos
3
Bryophyte-like plants evolved from Charophycean
Green Algae
Chara
A Coleochaete B Parka (Ordovician) From
Berkeley Time Machine
Coleochaete
4
(No Transcript)
5
Seedless Vascular Plants
  • Vascular tissue improves sporophyte efficiency
  • Dominant plants from late Devonian through early
    Permian
  • Equatorial coal forests

6
(No Transcript)
7
Early Devonian landscape
8
Carboniferous (-300 my) coal forest model
9
Imagine a dragonfly with a wingspan of over 1
meter
10
Carboniferous forest
11
Devonian plant roots
12
First seed plants
  • Pregymnosperms
  • Early Permean
  • Pangea dry, continental climates

13
Seed fern seeds
Trigonocarpus from Mazon Creek formation
(Carboniferous)
14
Evolution of flower fruit
  • First fossils late Jurassic period of Mesozoic
    era
  • Diversified during Cenozoic era
  • Coevolution with pollinators

15
Oldest flowering plant fossil
16
Fruit fossil
17
Primitive existing flowers
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