Plant Phylogeny Ordovician period of Paleozoic era 475 mya

1
Plant Phylogeny Ordovician period of Paleozoic
era (475 mya)

• origin of plants from aquatic ancestors,
  Chlorophyta
• cuticle, jacketed gametangia

2
Fig. 37.4
3
Fig. 37.6
4
Fig. 37.7
5
Plant Phylogeny early Devonian period (400 mya)

• 2. seedless vascular plants
• mechanism to transport water nutrients

6
Fig. 37.9
7
Fig. 37.11
8
Plant Phylogeny end of Devonian period (360 mya)

• 3. origin of seed which contains embryo with food
  reserve

From ovule to seed
9
Fig. 37.12
10
Fig. 37.14
11
Plant Phylogeny early Cretaceous period in
Mesozoic era (130 mya)

• 4. origin of flowering plants
• seeds with protective chambers, ovaries

12
Fig. 37.3
13
Sporophyte 2N, sexual, produces spores
Angiosperms
nonvascular
Relative dominance in major plant lineages
Gymnosperms
Seedless vascular
Bryophytes (nonvascular)
Gametophyte 1N, asexual produces gametes