BIO 200LLB Lecture Notes - Lecture 27: Lycopodiopsida, Vascular Plant, Hornwort

• School: University at Buffalo
• Department: Biological Sciences
• Course: BIO 200LLB
• Professor: Herreid, C F

Document Summary

Nonvascular plants with a dominant gametophyte generation. Vascular plants with a dominant sporophyte generation. Increased areas for sporangia (as opposed to only one per sporophyte in the. Roots: anchor plants in soil and acquire nutrients and water. Turgor pressure in cells with cell walls. Requires large surface area for photosynthesis (leaves) Waxy cuticle on leaves prevents water loss. Holes in surface of leaf, but this means h2o loss. Solutions: non-swimming sperm with tough water resistant coat. Found in siberian permafrost 32,000 years old have been germinates. Large surface area to catch the breezes. Fruit eaten by animals and the seeds dropped at a distance from the parent plant. Mycorrhizae are probably key to the colonization of land by plants. They are found with the earliest fossils of land plants. Plants are connected to underground fungi in a mutualistic relationship. Hypha mycelium network increases active root surface for nutrient acquisition up to 700 times.