Plantdiversity

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Plantdiversity

  1. 1. Diversity in the plant kingdom© 2008 Paul Billiet ODWS
  2. 2. Bryophyta Small terrestrial plants restricted to damp habitats Water is needed for fertilisation Spores ensure dispersal© 2008 Paul Billiet ODWS
  3. 3. Bryophyta Hepaticae the liverworts Prostrate thallus with rhizoids www.flwildflowers.com/flwildflowers.html© 2008 Paul Billiet ODWS
  4. 4. Bryophyta Musci the mosses Erect stem with leaflets +/- rhizoids http://www.univ-ubs.fr/© 2008 Paul Billiet ODWS
  5. 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. 6. Filicinophyta procosara.org/san_rafael_en,photo,64?PHPSESSI...www.rook.org/earl/bwca/nature/ferns/index.html
  7. 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. 8. Coniferophytahttp://www.nearctica.com/trees/conifer/places/eastern.htm Araucaria sp. (Monkey-puzzle) http://www.britannica.com/ebc/art-21824/Monkey-puzzle-tree
  9. 9. Angiospermophyta the floweringplants 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. 10. SummaryFeature Bryophyta Filicinophyta Coniferophyta Angiospermophyt aCommon Mosses Ferns Conifers Flowering plantsnameLeaves Scales Yes Yes YesRoots Rhizoids Yes Yes YesVascular No Yes Yes YessystemWoody Small Yes Yes YestissueWaxy Damp Yes Yes Yescuticle habitatsWater for Yes Yes No NofertilisationSeeds No No Yes YesCones No No Yes NoFruit No No No Yes© 2008 Paul Billiet ODWS
  11. 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. 12. Dicotyledon seedSeed coat ortesta 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. 13. Monocotyledon seed Seed coat Endosperm (food reserve) Cotyledon Plumule Radicle© 2008 Paul Billiet ODWS
  14. 14. Dicots v Monocots – other differences Dicotyledons MonocotyledonsTap roots and lateral Fibrous adventitiousbranches rootsNet-veined leaves Parallel-veined leaves© 2008 Paul Billiet ODWS
  15. 15. Dicots v Monocots – other differences Dicotyledons MonocotyledonsVascular tissue in a ring Vascular tissue scatteredround the stem Vascular throughout stem Vascular Cortex tissue tissue Pith EpidermisFlowers with Flowers withmultiples multiplesof 4 or of 3 organs5 organs© 2008 Paul Billiet ODWS

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