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Tendances
Tendances (19)
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Dernier (20)
Plantdiversity
- 1. Diversity in the plant kingdom © 2008 Paul Billiet ODWS
- 2. Bryophyta Small terrestrial plants restricted to damp habitats Water is needed for fertilisation Spores ensure dispersal © 2008 Paul Billiet ODWS
- 3. Bryophyta Hepaticae the liverworts Prostrate thallus with rhizoids www.flwildflowers.com/flwildflowers.html © 2008 Paul Billiet ODWS
- 4. Bryophyta Musci the mosses Erect stem with leaflets +/- rhizoids http://www.univ-ubs.fr/ © 2008 Paul Billiet ODWS
- 5. Filicinophyta the ferns Water still needed for fertilisation Spores ensure dispersal Vascular plants Lignified tissue (wood) may be present Differentiated into: leaves, stem, roots, rhizome © 2008 Paul Billiet ODWS
- 6. Filicinophyta procosara.org/san_rafael_en,photo,64?PHPSESSI... www.rook.org/earl/bwca/nature/ferns/index.html
- 7. Coniferophyta the conifers Vascular plants Seed plants Seeds contain a food store for an embryo inside protective coat Seeds ensure dispersal Naked seeds born in cones http://www.nasa.gov/centers/goddard/news/topstory/2006/forest_changes_prt.htm © 2008 Paul Billiet ODWS
- 8. Coniferophyta http://www.nearctica.com/trees/conifer/places/eastern.htm Araucaria sp. (Monkey-puzzle) http://www.britannica.com/ebc/art-21824/Monkey-puzzle-tree
- 9. Angiospermophyta the flowering plants Vascular plants Seed plants Seeds protected by an ovary which becomes a fruit Fruit, a structure that encourages seed dispersal © 2008 Paul Billiet ODWS
- 10. Summary Feature Bryophyta Filicinophyta Coniferophyta Angiospermophyt a Common Mosses Ferns Conifers Flowering plants name Leaves Scales Yes Yes Yes Roots Rhizoids Yes Yes Yes Vascular No Yes Yes Yes system Woody Small Yes Yes Yes tissue Waxy Damp Yes Yes Yes cuticle habitats Water for Yes Yes No No fertilisatio n Seeds No No Yes Yes Cones No No Yes No Fruit No No No Yes © 2008 Paul Billiet ODWS
- 11. Dicotyledons & Monocotyledons Angiosperms are divided into two groups The basic distinguishing feature are embryonic leaves (coytledons) Cotyledons are found in the seeds of these plants © 2008 Paul Billiet ODWS
- 12. Dicotyledon seed Seed coat or testa Cotyledons acting as a food reserve Plumule (to become the first true leaf) Micropyle Radicle © 2008 Paul Billiet ODWS (to become the first root)
- 13. Monocotyledon seed Seed coat Endosperm (food reserve) Cotyledon Plumule Radicle © 2008 Paul Billiet ODWS
- 14. Dicots v Monocots – other differences Dicotyledons Monocotyledons Tap roots and lateral Fibrous adventitious branches roots Net-veined leaves Parallel-veined leaves © 2008 Paul Billiet ODWS
- 15. Dicots v Monocots – other differences Dicotyledons Monocotyledons Vascular tissue in a ring Vascular tissue scattered round the stem Vascular throughout stem Vascular Cortex tissue tissue Pith Epidermis Flowers with Flowers with multiples multiples of 4 or of 3 organs 5 organs © 2008 Paul Billiet ODWS