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Plant Division

Plant Division. M6 Plant Biology Satit Patumwan. Plant Kingdom. You will remember from M4 Genetics that the plant kingdom is not divided into phylum but into DIVISIONS . Botanists (plant biologists) have classified 12 divisions of plants. The 12 divisions are separated into 2 groups:

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Plant Division

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  1. Plant Division M6 Plant Biology Satit Patumwan

  2. Plant Kingdom • You will remember from M4 Genetics that the plant kingdom is not divided into phylum but into DIVISIONS. • Botanists (plant biologists) have classified 12 divisions of plants. The 12 divisions are separated into 2 groups: • Non-seed plants • Seed plants

  3. Seedless plants(Non-seed plants)

  4. Non-seed plants • There are 7 divisions of non-seed plants: • Hepatophyta • Anthocerophyta • Bryophyta • Psilophyta • Lycophyta • Sphenophyta • Pterophyta

  5. Hepatophyta • Small plants • Liverwort plants- Hepta means liver- these plants sometimes have leaves that looks like a liver. Wort- mean herb • Often confused with mosses. • Simple unicellular roots. • Nonvascular plants- grow in moist areas • Pioneer plants- first to go in new areas such as lava fields etc

  6. Liverworts

  7. Bryophyta • Like Hepatophytes they are seedless non-vascular small pioneer plants that usually grow in moist areas • The most common plant in this division is the MOSS • They have a simple filament as a root called a rhizoids which are a few cells in length and hold the plant in place

  8. Moss

  9. Anthocerophyta • Small plants • Like Hepatophytes and bryophyta they are non vascular seedless plants. • The sporophytes of these plants look like horns or antlers of an animal and therefore are commonly called Hornworts

  10. Hornwort Young Hornwort Old Hornwort

  11. Psilophyta • Seedless Vascular plant • They have leafless stems • They do not have any roots either • Most live in tropical areas • They are commonly called Whisk Ferns

  12. Whisk fern

  13. Lycophyta • Club Mosses • Vascular plants that have very small vascular leaves. • These plants are very ancient • The ancient plants which grew much taller have been transformed into coal which we use today.

  14. Club moss

  15. Sphenophyta • Horsetails • Vascular, seedless plants • They have hollow stems surrounded by needlelike leaves. • They are found near wet swamps

  16. Horsetail Horsetails look almost like small trees

  17. Pterophyta • Non seed, vascular plants • Grow in damp, shady places • Commonly known as the ferns • Usually have long leaves which can grow 5m in length, which are called fronds

  18. Fern- sporophyte generation

  19. Fern- Alternation of Generations Gametophyte stage of a fern

  20. Homework Please make a PowerPoint presentation on one of the divisions of the seed plants: • Cycadophyta • Gnetophyta • Ginkgophyta • Coniferophyte • Anthophyte (Please find the information on page 587-589 of your Biology textbook or in the library)

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