Introduction to Seedless Vascular Plants (2/11/16)
Introduction to Seedless Vascular Plants (2/11/16) BIOL 1030
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This 2 page Class Notes was uploaded by Crystal Boutwell on Thursday February 11, 2016. The Class Notes belongs to BIOL 1030 at Auburn University taught by Debbie Folkerts in Fall 2015. Since its upload, it has received 69 views. For similar materials see Organismal Biology in Biology at Auburn University.
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Date Created: 02/11/16
S EEDLESS V ASCULAR PLANTS Key Characteristics: 1. No seeds yet 2. Vascular tissue/ true plant organs 3. 3 tissue systems a. Dermal Tissue: the skin of the plant; runs continuously and covers the outer surface of plant parts. b. Ground tissue system: makes up the bulk of the plant parts. Where photosynthesis occurs and storage of plant products. c. Vascular tissuesystem: within theveinsofleafofplant;water transport. Multiple typesofvascular tissue: i. Xylem ii. Phloem 4. Plant organs: a. Roots: underground parts b. Shoot: above ground part (stems and leaves) c. Types of leaves: i. Microphylls: (small leaf) a single vein of vascular tissue within the leaf. ii. Megaphylls: (big leaf) branching venations. 5. Annuals: life cycle completes over a year. 6. Perrenials: longer life. a. Primary growth: grows in length b. Secondary growth: grows in girth. 7. HomosporyHeterospory a. Leads to more than one type of gametophyte b. Leads to more than one type of gamete. c. Microspores: produce microgametophytes (also called pollen grains) which disperse. d. Megaspores: produce megamaetophytes which produce ovules to be fertilized and become seeds. 8. Sporophyte Dominated Life cycle 4 Major Groups today: A. Many seedless vascular plants are extinct B. 2 phylum remain: a. Monilophyta: i. ***Pterophytes-true ferns ii. Psilophytes-whisk “ferns” iii.Arthrophytes- Equisetophytes; single genus (horsetails) b. Lycophyta-club mosses Life Cycle of Pterophytes Megaphyll Section of leaves: Frond Compound: Pinnate (the individual leaves) Circinate vernation: coileMeiosis leaf development Fiddeheads=croziers Sporophyte (2n) Meiospores Mitosis Prothallus: body form of a Sporeling gametophyte. Very "baby sporophyte" small. Produces gamatangia (one or both types) syngamy Zygote (2n)