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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 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: • Non-seed plants • Seed plants
Non-seed plants • There are 7 divisions of non-seed plants: • Hepatophyta • Anthocerophyta • Bryophyta • Psilophyta • Lycophyta • Sphenophyta • Pterophyta
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
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
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
Hornwort Young Hornwort Old Hornwort
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
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.
Sphenophyta • Horsetails • Vascular, seedless plants • They have hollow stems surrounded by needlelike leaves. • They are found near wet swamps
Horsetail Horsetails look almost like small trees
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
Fern- Alternation of Generations Gametophyte stage of a fern
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)