BIOL 1030 Lecture Notes - Lecture 7: Sorus, Spermatogenesis, Prothallium

• School: University of Manitoba
• Department: Biological Sciences
• Course: BIOL 1030
• Professor: Carla Zelmer

Document Summary

Ulva sea lettuce: a thallus is a multicellular plant body exhibiting little differentiation of tissues and lacking such organs as roots, stems and leaves, the thallus is derived from cell divisions occurring in more than two planes. Moss non vascular: mosses are non vascular and are different than club mosses, club mosses are vascular plants with erect stems that bear spores in club shaped, cone like structures, true mosses are non vascular plants which have simple leaf like, root like, and stem like parts. Sphagnum: growth of the moss thallus is from repeated mitotic division of a single pyramid shaped cell located at the apex of the thallus, older basal portions of the thallus progresively die and decompose (decomposing sphagnum moss = peat) Sexual reproduction: mosses: dioceous, antheridia and archegonia which are the male and female gametangia that are produced on separate plants (unisexual)