BIOA02H3 Lecture Notes - Lecture 2: Sorus, Azolla, Lycopodiophyta

• School: UTSC
• Department: Biological Sciences
• Course: BIOA02H3
• Professor: Ivana Stehlik

Document Summary

Lycophyte began in: phanerozoic (eon), paleozoic conquering dry land by vascular plants forests w/o do(cid:374)"t k(cid:374)o(cid:449) (cid:449)he(cid:374) (cid:271)ryophytes first origi(cid:374)ated. Lycophytes (1200) (era), silurian period leaves, plants w/ primitive organs on top of soil. Photosynthetic roots w/ sporanges vascular tissue (700) and quilworts (150) vascular plants colonized w/ cuticles, stomata and. Ferns originated in carboniferous time accumulation of partly decomposed plant matter (eg. ferns (12,000) In carboniferous big layers of plant matter accumulated (eg. ancient fossilized ferns) Types: whisk ferns (2), horsetails (15, made up big trees in carboniferous era contribute to fossils), true ferns (12,000, many shapes and sizes) 75% of true ferns are found in tropics tiny azolla to 25m tall fern tress. > true ferns also found in arctic, deserts. Aquatic azolla is smallest fixes nitrogen (also important in rice patty production) Mature leaf (on left), sub-mature leaf (on right)