Called "non vascular plants" because of their dominant stage (gametopyte) lacks vascular tissues, Similar characteristics believed to be in the first land plants.
Non-Vascular
- no water transport system
- no true roots
Swimming sperm
- flagellated sperm
Life cycle dominated by haploid gametophyte stage
- fuzzy moss plant, haploid
Spores for reproduction
- haploid cells which sprout to form gametophytes
Non-Vascular
- no water transport system
- no true roots
Swimming sperm
- flagellated sperm
Life cycle dominated by haploid gametophyte stage
- fuzzy moss plant, haploid
Spores for reproduction
- haploid cells which sprout to form gametophytes
Typical life cycle: |
In the life cycle of the bryophyte
Utilize Alternation of Generation from algae. Gametophyte shows two distinct sexes: the male antheridium and female archegonium The dominant stage (gametophyte) is involved in sexual reproduction. Archegonium: female shoot, it contains the archegonium is at the top of the shoot. Dominant, haploid and produced by mitosis and contains the egg Antheridium: male gametophyte, is at the top if the shoot, dominant, haploid and produces motile sperm by mitosis. Fertilization occurs when there is enough water for the sperm to swim to the egg Sporophyte: Fertilization results in a diploid sporophyte which grows out of the archegonium and forms a spore capsule. Contains vascular tissue. Produces haploid, wind borne spores by meiosis. |