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BIOL 1030 Lec 2/16 & 2/18

by: Emma Cox

BIOL 1030 Lec 2/16 & 2/18 BIOL 1030 - 002

Marketplace > Auburn University > Biology > BIOL 1030 - 002 > BIOL 1030 Lec 2 16 2 18
Emma Cox
GPA 4.0

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About this Document

These notes cover Phylums Monilophyta and Lycophyta
Organismal Biology
Debbie R. Folkerts
Class Notes
Organismal Biology
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This 3 page Class Notes was uploaded by Emma Cox on Saturday February 20, 2016. The Class Notes belongs to BIOL 1030 - 002 at Auburn University taught by Debbie R. Folkerts in Summer 2015. Since its upload, it has received 52 views. For similar materials see Organismal Biology in Biology at Auburn University.


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Date Created: 02/20/16
Phylum Monilophyta •   Arthrophyta (Equisetophyta) – horsetails and scouring rushes •   Silicious (SiO ) in cell wall 2 •   Nodes (where leaves are attached) and internodes (area between leaves) •   Leaf arrangement o   Alternate – 1 leaves emerge from stem one at a time o   Opposite – 2 leaves on opposite sides o   Whorl – more than two leaves around the stem •   Microphylls – o   Strobilus (-i) – where sexual reproduction will continue; tight clusters of leaves §   Clusters of sporophylls (spore bearing leaves) •   Contain sporangiophores (spore containers) •   Sporangia – contained in the sporangiophores (actual spore containers – have diploid cells undergoing mitosis to produce the meiospores) •   Elaters – coiled, threadlike structures o   Coiled around each meiospore o   Respond to changing humidity (coil up if it is humid) (hygroscopic) Phylum Lycophyta – club mosses •   Strobilus – cluster of modified leaves •   Heterospory Gymnosperms – superphylum containing 4 phyla •   All are heterosporous •   Most without flagellated sperm •   Separation of male and female life cycle in the gametophyte generation o   Male – dispersal as a gametophyte is now possible (microgametophyte is the dispersal form = pollen grain) o   Female – retained within the sporangium = ovule, megagametophyte •   Seed – very resistant, easily dispersed, can lie dormant o   3 layered structure (3 generations packaged within one) §   “baby in lunch box” packaged in gametophyte generation, protected by the sporophyte generation (box = integument) (embryo = baby) •   baby = 2n, lunch = n, box = 2n •   decrease size and lifespan of gametophyte generation •   “naked seeds” – no fruit •   monoecious – “1 home” for both sexes – see both seed cones and pollen cones on pine tree •   (dioecious – 2 hourses for the separate sexes) •   outer layers of ovule will become see coat •   Phylum Conerophyta – cone-bearing trees o   largest group of gymnosperms o   megasporangiate strobili and microsporangiate strobili o   monoecious o   2 prothallial cells o   tube cell – expands into a tube to deliver the sperm o   generative cell – 2/18 •   Pinus palustris – longleaf pine o   P. o   Pinnaceae o   Pinales o   Pinopsida o   Coniferophyta o   P o   E o   Pyrophyte – plant that requires fire and is adapted to it •   Longleaf pine forest o   Biodiversity o   97% decline o   red heart disease o   Red-cockaded woodpecker §   Lives in longleaf pine forest with very old trees §   Make cavities in trees for nest §  


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