Nonvascular Plants and Seedless Vascular Plants BSC 2011

Nonvascular Plants and Seedless Vascular Plants BSC 2011 L

Plants Domain Eukarya Kingdom Plantae “Bryophytes” - nonvascular seedless plants Phylum Hepatophyta Phylum Anthocerotophyta Phylum Bryophyta “Vascular Seedless Plants” Phylum Lycopodophyta Phylum Monilophyta Liverworts Hornworts Moss Club Moss Wisk fern Horsetails Ferns

Evolutionary relationships of plants Review Fig 16. 1

Alternation of Generations Sporophyte Generation Produces haploid spores by meiosis Gametophyte Generation Produces gametes by mitosis

Nonvascular Seedless Plants Mosses, liverworts, and hornworts Gametophyte generation is dominant Produces eggs in archegonia Produces flagellated sperm in antheridia Rely on water source for reproduction Notice the gemmae cups In this liverwort

Nonvascular Seedless Plants Moss Life Cycle

Vascular Seedless Plants Whisk ferns, club mosses, horsetails, and ferns Sporophyte generation is dominant Adaptations for living on land Vascular tissue Windblown spores

Vascular Seedless Plants Fern Life Cycle

What is a Thallus? Body of a lower plant that has no recognizable shoot, root, or leaf regions Fern prothallus - gametophyte Young sporophyte emerging from prothallus

Vascular Seedless Plants Cross Section of Frond Leaflet Sporophyte Generation Look at Figure 16. 15 The sorus contains the sporangium where the spores are produced