Land Plants fall into two major groups

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0. 0. Land Plants fall into two major groups. Non vascular Vascular. 0. Non-Vascular Plants. Lack vascular tissue Very small Known as the bryophytes. 0. The Bryophytes. Mosses. Liverworts. Hornworts. 0. Mosses. True mosses Sphagnum (Peat) mosses Granite mosses. 0. - PowerPoint PPT Presentation

Transcript of Land Plants fall into two major groups

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  • Land Plants fall into two major groupsNon vascular Vascular0

  • Non-Vascular PlantsLack vascular tissue Very smallKnown as the bryophytes

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  • The BryophytesLiverwortsHornwortsMosses0

  • MossesTrue mossesSphagnum (Peat) mossesGranite mosses0

  • True MossesConsists of structures resembling leaves stems and roots

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  • True MossesLeaves have no veinsStems have no vascular tissue0

  • True MossesReproduces by spores Produced in a capsule

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  • True Mosses The SporophyteWhen operculum is shed peristome teeth are exposedPeristome regulates spore dispersal

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  • MossesTrue mossesSphagnum (Peat) mossesGranite mosses0

  • Sphagnum (Peat) MossesGrow in BogsBogs may cover huge areasMoss absorbs waterWater is acidified by the moss0

  • Sphagnum (Peat) MossesUnique leaf structure allows leaves to absorb large quantities of waterMoss absorbs waterWater is acidified by the moss0

  • Sphagnum (Peat) MossesUnique leaf structure allows leaves to absorb large quantities of waterMoss absorbs waterWater is acidified by the moss0

  • Sphagnum (Peat) MossesThick deposits of partially decomposed moss accumulatesDeposits are known at Peat0

  • Sphagnum and Peat are Harvested for Agriculture and Fuel0

  • Acid pH and capacity for water retention make sphagnum a popular soil amendment0

  • Sphagnum (Peat) MossesPeat has been harvest for centuries and burned for fuel0

  • Bodies buried in Sphagnum Bogs are well preservedAcid/anoxic environment retards bacterial growth0Short video Mummies Frozen in Time

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  • Land Plants fall into two major groupsNon vascular Vascular0

  • Vascular PlantsVascular tissue Some are seedlessOthers produce seeds

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  • Seedless Vascular PlantsWhisk FernsClub/Spike Mosses0HorsetailsFerns

  • Whisk Ferns0

  • Whisk FernsDichotomous branching stems0

  • Whisk FernsNo roots underground rhizome only0

  • Whisk FernsNo leaves- stem appendages are called enations

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  • Whisk FernsSporangia attached laterally on stem

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  • Seedless Vascular PlantsWhisk FernsClub/Spike Mosses0HorsetailsFerns

  • Plants with leaves have either microphylls or megaphyllsMicrophylls have a single vascular strandMegaphylls have a network of vascular strands0

  • Club and Spike MossesStems, roots and leaves Leaves are microphylls0

  • Club and Spike MossesSporangia produced in axils of leaves

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  • Club and Spike MossesSporangia produced in axils of leaves

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  • Seedless Vascular PlantsWhisk FernsClub/Spike Mosses0HorsetailsFerns

  • Horsetails and Scouring Rushes0

  • Horsetails and Scouring RushesStems jointedBranches whorled around stem0

  • Horsetails and Scouring RushesStems ribbedSilica in cells of the epidermis0

  • Horsetails and Scouring RushesLeaves small Reduced megaphyllsWhorled at nodesUnderground rhizome with Roots0

  • Horsetails and Scouring RushesSpores produced in terminal strobilous0

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  • Seedless Vascular PlantsWhisk FernsClub/Spike Mosses0HorsetailsFerns

  • Ferns0

  • Ferns show great diversity of form0

  • Ferns have megaphylls0

  • Young fern megaphylls are called fiddleheads 0

  • Fern stems grow vertically or horizontally0

  • Spores are produced on underside of megaphylls0

  • Spores are produced in clusters called Sori0

  • Sori of many ferns are covered by an indusium0

  • Sori of many ferns are covered by an indusium0

  • Seedless Vascular Plants0


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