Cycadales and Ginkgo PowerPoint PPT Presentation

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Title: Cycadales and Ginkgo


1
  • Cycadales and Ginkgo
  • Cycadales
  • Vegetative
  • Leaves, stems, roots
  • Reproductive
  • Cones
  • Female, male gametophytes
  • Embryo development
  • Ginkgoales
  • Vegetative
  • Leaves, stems, roots
  • Reproductive
  • Female, male gametophytes
  • Embryo development

Tissue types, arrangement? Life
cycle? Synapomorphies?
2
  • Cycadales and Ginkgo
  • Cycadales
  • Vegetative
  • Leaves, stems, roots
  • Reproductive
  • Cones
  • Female, male gametophytes
  • Embryo development
  • Rosette growth habit
  • Secondary growth?
  • Girdling leaf traces
  • Coralloid roots
  • Eusteles!

3
  • Cycadales and Ginkgo
  • Cycadales
  • Vegetative
  • Leaves, stems, roots
  • Reproductive
  • Cones
  • Female, male gametophytes
  • Embryo development
  • Rosette growth habit
  • Secondary growth?
  • Girdling leaf traces
  • Coralloid roots
  • Eusteles!

4
  • Cycadales and Ginko
  • Cycadales
  • Vegetative
  • Leaves, stems, roots
  • Reproductive
  • Cones
  • Female, male gametophytes
  • Embryo development

5
  • Cycadales and Ginko
  • Cycadales
  • Vegetative
  • Leaves, stems, roots
  • Reproductive
  • Cones
  • Female, male gametophytes
  • Embryo development

6
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7
  • Cycadales and Ginkgo
  • Cycadales
  • Vegetative
  • Leaves, stems, roots
  • Reproductive
  • Cones
  • Female, male gametophytes
  • Embryo development
  • Microsporophyll
  • Eu- or Leptosporangia?

8
  • Cycadales and Ginkgo
  • Cycadales
  • Vegetative
  • Leaves, stems, roots
  • Reproductive
  • Cones
  • Female, male gametophytes
  • Embryo development
  • Salpinx?
  • Megasporophyll
  • How does the sperm get to the egg?

C
M
9
  • Cycadales and Ginkgo
  • Cycadales
  • Vegetative
  • Leaves, stems, roots
  • Reproductive
  • Cones
  • Female, male gametophytes
  • Embryo development
  • Female Gametophyte
  • Nucellus
  • Integument
  • Endotesta
  • Scelerotesta
  • Sarcotesta

10
  • Cycadales and Ginkgo
  • Cycadales
  • Vegetative
  • Leaves, stems, roots
  • Reproductive
  • Cones
  • Female, male gametophytes
  • Embryo development

C
M
11
  • Cycadales and Ginkgo
  • Cycadales
  • Vegetative
  • Leaves, stems, roots
  • Reproductive
  • Cones
  • Female, male gametophytes
  • Embryo development

12
  • Cycadales and Ginkgo
  • Ginkgoales
  • Vegetative
  • Leaves, stems, roots
  • Reproductive
  • Female, male gametophytes
  • Embryo development

- Leaf Characters? - Short vs. Long shoots
13
  • Cycadales and Ginkgo
  • Ginkgoales
  • Vegetative
  • Leaves, stems, roots
  • Reproductive
  • Female, male gametophytes
  • Embryo development

Crystals!
Shoot Apical Meristem
14
  • Cycadales and Ginkgo
  • Ginkgoales
  • Vegetative
  • Leaves, stems, roots
  • Reproductive
  • Female, male gametophytes
  • Embryo development

lt Root cross section
15
  • Cycadales and Ginkgo
  • Ginkgoales
  • Vegetative
  • Leaves, stems, roots
  • Reproductive
  • Female, male gametophytes
  • Embryo development

16
  • Cycadales and Ginkgo
  • Ginkgoales
  • Vegetative
  • Leaves, stems, roots
  • Reproductive
  • Female, male gametophytes
  • Embryo development

17
  • Cycadales and Ginkgo
  • Ginkgoales
  • Vegetative
  • Leaves, stems, roots
  • Reproductive
  • Female, male gametophytes
  • Embryo development

What happens to the cotyledons during germination?
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