BIOL 1030 Lecture Notes - Lecture 23: Meristem, Archegonium, Polytrichum

• School: University of Manitoba
• Department: Biological Sciences
• Course: BIOL 1030
• Professor: Scott Kevin

Document Summary

Can dominant a landscape and can grow over water. Lipid is hydrophobic, and keeps the water in the cell: limited to moist environment, sporophyte is dependent on the female gametophyte for nutrition, short lived. Polytrichum moss - common name is haircap moss, thallus. When they started to grow, probably had rhizoid. Entire thallus can: absorb water and minerals. Rhizoids die off after first year, function is anchorage. Archegonia and antheridia form over the apical meristem. Mature sporophyte: foot - receives nutrients transported from female gametophyte, seta, elonagted stalk, raises up spore bearing capsule - dispersal, sporangium, site of meiosis, young sporocyte cells (2n) ---> spores (n) Spores give rise to a new haploid phase. In the top it has spores that are haploid spores that disperse through wind. Forms a bud - arises the gametophore (male or female) Sperm moves to archegonia and swims down the neck of the archegonia into the venter and fertilization occurs.