SI Session Topic 16 Seedless Vascular Plants Spring 2010 For Dr. Hughey’s Bio 3 Class Picture from Designed by Pyeongsug Kim ©2010

Designed by Pyeongsug Kim, ©2010

__________ : small leaves that contain a single strand of vascular tissue. __________ : large leaves that contain multiple strands of vascular tissue. Microphylls Megaphylls Designed by Pyeongsug Kim, ©2010

Phylum ______________ Genus ______________ Lycopodium Lycopodiophyta Strobili Roots Rhizome Microphylls Designed by Pyeongsug Kim, ©2010

Phylum ______________ Genus ______________ Selaginella Lycopodiophyta Stem Microphylls Designed by Pyeongsug Kim, ©2010

Vascular Plant Terminology #3 Sporophyll- a modified leaf that bears sporangia. –Sporangium- a structure that produces spores. From the Dr. Hughey’s Bio3 class slide Designed by Pyeongsug Kim, ©2010

Strobilus Sporangia Phylum ______________ Genus ______________ Selaginella ________- a reproductive structure consisting of nonphotosynthetic sporophylls; a cone. Lycopodiophyta Sporophylls Designed by Pyeongsug Kim, ©2010

Phylum ______________ Genus ______________ Isoetes Lycopodiophyta From the Dr. Hughey’s Bio3 class slide Designed by Pyeongsug Kim, ©2010

Vascular Plant Terminology #2 _____________ production of one type of spore from one kind of sporangium. ______________ production of two types of spores from two different kinds of sporangia. From the Dr. Hughey’s Bio3 class slide Homosporous Heterosporous Designed by Pyeongsug Kim, ©2010

Vascular Plant Terminology #4 Microsporophyll- a modified leaf that bears microsporangia. –Microsporangia- a sporangium that produces microspores. Megasporophyll- a modified leaf that bears megasporangia. –Megasporangia- a sporangium that produces megaspores. From the Dr. Hughey’s Bio3 class slide Designed by Pyeongsug Kim, ©2010

Phylum ______________ Lycophyta Designed by Pyeongsug Kim, ©2010

Sporangia Microsporangia Megasporangia Homosporus Heterosporus Sporophylls Microsporophylls Megasporophylls Designed by Pyeongsug Kim, ©2010

Phylum ______________ Genus ______________ Lycopodiophyta Lycopodium Sporangia (Spores) Sporophylls (Homosporus/Heterosporus) Lycopodium Sporangium containing Tetrads of Spores. Tetrad = Four. (Meiosis) Designed by Pyeongsug Kim, ©2010

Phylum ______________ Genus ______________ Lycopodiophyta Microsporangia (Microspores) Megasporophylls (Homosporus/Heterosporus) Megasporangia (Megaspores) Selaginella Microsporophylls Designed by Pyeongsug Kim, ©2010

Phylum ______________ Genus ______________ Lycopodiophyta Isoetes (Homosporus/Heterosporus) Designed by Pyeongsug Kim, ©2010

Stele Stele ~ The central core of tissue in the stem or root of a vascular plant, consisting of the xylem and phloem together with supporting tissues. ___________ the vascular cylinder surrounds a pith. Siphonostele _________ forms a solid core of xylem encased by phloem. Protostele Designed by Pyeongsug Kim, ©2010

Designed by Pyeongsug Kim, ©2010

Stem (Lycophyta) Protostele : A stele that forms a solid core of xylem encased by phloem. Root (Lycophyta) Designed by Pyeongsug Kim, ©2010

Order ___________ Phylum _____________ Pteridophyta Order ___________Filicales Polypodium Order ___________Psilotales Psilotum. Equisetales Equisetum. Designed by Pyeongsug Kim, ©2010

Phylum _____________ Pteridophyta Order ___________ Polypodium Filicales A D B C E F A: B: C: D: E: F: Sporophyte (2n) Rizome Roots Gametophyte(n) (Prothallus) Spores(n) Sori (contains sporangia) Designed by Pyeongsug Kim, ©2010

Polypodium- Filicales From the Dr. Hughey’s Bio3 class slide Designed by Pyeongsug Kim, ©2010

Phylum _____________ Pteridophyta Order ___________Filicales Polypodium Sori (naked) Megaphylls Sori (sporangia) (covered by ______) DryopterisSporophyte(2n) Contains _________Sporangia indusia Designed by Pyeongsug Kim, ©2010

Phylum _____________ Pteridophyta Order ___________Filicales Polypodium Naked Covered by indusia As the sporangia dry, they will begin to discharge their spores.Spores(n) Sporangia Indusia Designed by Pyeongsug Kim, ©2010

What is the main method of dispersal in ferns? Dispersal of spores by wind Annulus (Homosporus/Heterosporus) Covered by indusia Designed by Pyeongsug Kim, ©2010

Gametophytes(n) Phylum _____________ Pteridophyta Order ___________Filicales Polypodium Prothallus (from a spore by )Mitosis Rhizoids Archegonia(egg) Antheridia(sperms) Designed by Pyeongsug Kim, ©2010

Archegonia Phylum _____________ Pteridophyta Order ___________Filicales PolypodiumGametophytes(n) Each archegonium contains ________. one egg Designed by Pyeongsug Kim, ©2010

Antheridia Archegonia Phylum _____________ Pteridophyta Order ___________Filicales PolypodiumGametophytes(n) When it rains, sperm swim to the eggs in archegonia that are located near the cleft of the heart shape Designed by Pyeongsug Kim, ©2010

Archegonia receiving Sperm Multiflagellated sperm(n) Designed by Pyeongsug Kim, ©2010

Sporophyte(2n) Gametophyte(n) Phylum _____________ Pteridophyta Order ___________Filicales Polypodium Rhizoid Roots Designed by Pyeongsug Kim, ©2010

Designed by Pyeongsug Kim, ©2010

Psilotum- Psilotales From the Dr. Hughey’s Bio3 class slide Designed by Pyeongsug Kim, ©2010

Order ___________Psilotales Psilotum. Phylum _____________ Pteridophyta Sporangia Sporophyte(2n)Sporophyte(2n) Sporangium (Homosporus/Heterosporus) Designed by Pyeongsug Kim, ©2010

Gametophyte(n) Order ___________Psilotales Psilotum. Pteridophyta Phylum _____________ Archegonium Antheridium Designed by Pyeongsug Kim, ©2010

Order ___________ Phylum _____________ Pteridophyta Equisetales Equisetum. Vegetative shootsFertile shoots Strobilus Node Internode Designed by Pyeongsug Kim, ©2010

Equisetum- Equisetales From the Dr. Hughey’s Bio3 class slide Designed by Pyeongsug Kim, ©2010

Sporophyte(2n) Strobilus (cone) Order ___________ Phylum _____________ Pteridophyta Equisetales Equisetum. Sporophyte(2n) (Homosporus/Heterosporus) Strobilus (cone) Designed by Pyeongsug Kim, ©2010

Spores(n) Spores(n) Elaters Spore(n) Order ___________ Phylum _____________ Pteridophyta Equisetales Equisetum. When mature, elaters attached to the spore walls presumably aid in the disposal of spores from the dehiscing sporangia. Designed by Pyeongsug Kim, ©2010

Gametophyte(n) Gametophyte -Free-living -Bisexual Multiflagellated Sperm -require water to swim to egg. Designed by Pyeongsug Kim, ©2010