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Betty Lablah
Antoinette Lincoln
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Tegeste Kollie
Phylum Bryophyta (Mosses)
Lesson Outline
• Phylum Bryophyta overview
• General characteristics of
bryophytes
• Morphology
• Nutrition
• Classification of mosses
• General reproduction in Mosses
• Similarities between mosses and
algae
• Economic importance of mosses
• Ecological importune of mosses
Phylum Bryophyta Overview
• Bryophytes comes from the Greek
word “Bryo” meaning “Moss” and
“Phyte” meaning “Plant”
• Eukaryotic plant-like organism
without vascular system
• They consist of 20,000 plant species
• The science dealing with the study of
bryophytes is called Bryologist
Moss
Hornworts
Liverworts
Mosses Overview
• Consisting of more than 9,250 species of
mosss
• They require a watery medium to facilitate
the transportation of reproductive cells
• Simple green plants considered as lower
plants
• They include; Andreaeopsida(granite
mosses) Sphagnopsida (peat mosses)
Bryopsida(true mosses)
Granite Mosses
Peat Mosses
True Mosses
General Characteristics: Habitat
• Mosses are found in moist
environment
• Boggy are always home for
most mosses
• They can be found on
rocks, ground, and trees.
Habitat Cont’d…
Typical Mosses Morphology
Representation of Moss Gametophyte
and Sporophyte
Morphology Cont’d…
General Characteristics: Nutrition
• Mosses are non vascular plant
• They live as autotrophs
• They absorb water and nutrient mainly through their leaves though
diffusion
• They harvest carbondioxide and sunlight to create food by
Photosynthesis
Classification of Mosses
Mosses are classified into three class:
• Class Sphagnopsia
• Class Andreaeopsida
• Class Bryopsida
Class Sphagnopsida
• They consist of 150 species
• They are found on boggy ground
• They have chlorophyllose cells and
hyaline cells
• They consist of the genus sphagnum
known as peat moss
• The gametophyte of the sphagnum
has the pendent and divergentPeat moss
Examples of Sphagnum Mosses
Class Sphagnopsida: Life Cycle
• The life cycle of peat moss is comprise of two distinct generations, the
gametophyte and the sporophyte
• At the gametophyte stage which is haploid consist of the plant bearing
leaves, synthesizes chlorophyll and is able to sexually reproduce
• By sexual reproduction the gametophyte develops Antheridia and
Archegonia
Class Sphagnopsida: Life Cycle
Class Sphagnosida: Sporophyte
• The Sporophyte which is diploid consist of a capsule that encloses the
spores
• It is develop form a zygote as a result of sexual reproduction
• Under dry conditions the operculum burst open with an audible sound.
• In the Sporophyte after replication of the genome homologous pairs of
chromosomes come close and cross over their chromatids
Vegetative Reproduction: Peat Moss
• A new steam developed from a branch, during peat moss formation
it become separated and grow into an independent plant.
• A plant can also grow from shaded plant fragments
• This can also take place at the Protonema to increase the number of
buds from a single spore.
Vegetative Reproduction
Class Andreaeopsida
• Andreaeopsida are commonly called
granite mosses
• They consist of 100 species
• They live on rock
• They are usually blackish green to
reddish in color
• They live not only on rock but also on
the snow and ice itself
Class Andreaeopsida Cont’d…
Class Bryopsida
• Bryopsida are the largest class of moss
• They consist of 9,000 species
• They are also called true moss
• The life cycle of Bryopsida involves a Protonema that is a threadlike
and develop within the archegonium which remain attached to the
gametophyte and produce spores by meiosis
General Reproduction In Moss
• Moss under go both sexual, asexual and vegetative reproduction
• Reproduction in moss require water
• The life cycle begins with the haploid spore
Moss Life
Cycle
Similarities between Mosses and Algae
• They both have chlorophyll a and b
• Chloroplast structures are similar
• They have a thallus body
• They produce starch and contain cellulose
Difference between Bryophytes and Algae
• Algae are isogamous whereas mosses are oogamous
• The sex organs of algae are not covered by sterile jacket. In mosses
they are covered by sterile jacket
• Algae has homogenous alternation of generation
• Moses heterogenous
Comparative Morphology Among
Bryophytes
Liverworts Mosses Hornworts
Structure Thalloid or foliose Foliose Thalloid
Symmetry Dorsiventral or radial Radial Dorsiventral
Rhizoid Unicellular Multicellular Unicellular
Chloroplast/Cell Many Many One
Protonemata Reduced Present Absent
Gametangia Superficial Superficial Immersed
Economic Importance of Mosses
They are use for:
• Fuel
• Decoration
• Dressing of wounds
Ecological Importance of Mosses
They are use for:
• Soil Conditioning
• Primary Producer
• Garden
Garden
In Conclusion:
• Eukaryotic plant-like organism without vascular system
• Consisting of more than 9,250 species of mosss
• They require a watery medium to facilitate the transportation of
reproductive cells
• They live as autotrophs
• Three classes: They include; Andreaeopsida(granite mosses)
Sphagnopsida (peat mosses) Bryopsida(true mosses)
• Mosses are found in moist environment
Reference
• Introduction In Botany, Nabors, Murray W., Copyright 2004
Pearson Education, Inc., publishing as Benjamin Cummings, 1301
Sansome St., San Francisco, CA 94111. www.aw-bc.com
• WIKIPEDIA, The Free Encyclopedia
Thanks For Your Time
Questions
Comments
THE END
• “Whenever you are about to find fault with someone ask
yourself the following question:
What fault of mine most nearly resembles the one I am
about to criticize?”
Marcus Aurelius

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Phylum Bryophyta (mosses)

  • 1. Stephanie Korvah Betty Lablah Antoinette Lincoln Bob Bumie Tegeste Kollie Phylum Bryophyta (Mosses)
  • 2. Lesson Outline • Phylum Bryophyta overview • General characteristics of bryophytes • Morphology • Nutrition • Classification of mosses • General reproduction in Mosses • Similarities between mosses and algae • Economic importance of mosses • Ecological importune of mosses
  • 3. Phylum Bryophyta Overview • Bryophytes comes from the Greek word “Bryo” meaning “Moss” and “Phyte” meaning “Plant” • Eukaryotic plant-like organism without vascular system • They consist of 20,000 plant species • The science dealing with the study of bryophytes is called Bryologist Moss Hornworts Liverworts
  • 4. Mosses Overview • Consisting of more than 9,250 species of mosss • They require a watery medium to facilitate the transportation of reproductive cells • Simple green plants considered as lower plants • They include; Andreaeopsida(granite mosses) Sphagnopsida (peat mosses) Bryopsida(true mosses) Granite Mosses Peat Mosses True Mosses
  • 5. General Characteristics: Habitat • Mosses are found in moist environment • Boggy are always home for most mosses • They can be found on rocks, ground, and trees.
  • 8. Representation of Moss Gametophyte and Sporophyte
  • 10. General Characteristics: Nutrition • Mosses are non vascular plant • They live as autotrophs • They absorb water and nutrient mainly through their leaves though diffusion • They harvest carbondioxide and sunlight to create food by Photosynthesis
  • 11. Classification of Mosses Mosses are classified into three class: • Class Sphagnopsia • Class Andreaeopsida • Class Bryopsida
  • 12. Class Sphagnopsida • They consist of 150 species • They are found on boggy ground • They have chlorophyllose cells and hyaline cells • They consist of the genus sphagnum known as peat moss • The gametophyte of the sphagnum has the pendent and divergentPeat moss
  • 14. Class Sphagnopsida: Life Cycle • The life cycle of peat moss is comprise of two distinct generations, the gametophyte and the sporophyte • At the gametophyte stage which is haploid consist of the plant bearing leaves, synthesizes chlorophyll and is able to sexually reproduce • By sexual reproduction the gametophyte develops Antheridia and Archegonia
  • 16. Class Sphagnosida: Sporophyte • The Sporophyte which is diploid consist of a capsule that encloses the spores • It is develop form a zygote as a result of sexual reproduction • Under dry conditions the operculum burst open with an audible sound. • In the Sporophyte after replication of the genome homologous pairs of chromosomes come close and cross over their chromatids
  • 17. Vegetative Reproduction: Peat Moss • A new steam developed from a branch, during peat moss formation it become separated and grow into an independent plant. • A plant can also grow from shaded plant fragments • This can also take place at the Protonema to increase the number of buds from a single spore.
  • 19. Class Andreaeopsida • Andreaeopsida are commonly called granite mosses • They consist of 100 species • They live on rock • They are usually blackish green to reddish in color • They live not only on rock but also on the snow and ice itself
  • 21. Class Bryopsida • Bryopsida are the largest class of moss • They consist of 9,000 species • They are also called true moss • The life cycle of Bryopsida involves a Protonema that is a threadlike and develop within the archegonium which remain attached to the gametophyte and produce spores by meiosis
  • 22. General Reproduction In Moss • Moss under go both sexual, asexual and vegetative reproduction • Reproduction in moss require water • The life cycle begins with the haploid spore
  • 24. Similarities between Mosses and Algae • They both have chlorophyll a and b • Chloroplast structures are similar • They have a thallus body • They produce starch and contain cellulose
  • 25. Difference between Bryophytes and Algae • Algae are isogamous whereas mosses are oogamous • The sex organs of algae are not covered by sterile jacket. In mosses they are covered by sterile jacket • Algae has homogenous alternation of generation • Moses heterogenous
  • 26. Comparative Morphology Among Bryophytes Liverworts Mosses Hornworts Structure Thalloid or foliose Foliose Thalloid Symmetry Dorsiventral or radial Radial Dorsiventral Rhizoid Unicellular Multicellular Unicellular Chloroplast/Cell Many Many One Protonemata Reduced Present Absent Gametangia Superficial Superficial Immersed
  • 27. Economic Importance of Mosses They are use for: • Fuel • Decoration • Dressing of wounds
  • 28.
  • 29. Ecological Importance of Mosses They are use for: • Soil Conditioning • Primary Producer • Garden
  • 31. In Conclusion: • Eukaryotic plant-like organism without vascular system • Consisting of more than 9,250 species of mosss • They require a watery medium to facilitate the transportation of reproductive cells • They live as autotrophs • Three classes: They include; Andreaeopsida(granite mosses) Sphagnopsida (peat mosses) Bryopsida(true mosses) • Mosses are found in moist environment
  • 32. Reference • Introduction In Botany, Nabors, Murray W., Copyright 2004 Pearson Education, Inc., publishing as Benjamin Cummings, 1301 Sansome St., San Francisco, CA 94111. www.aw-bc.com • WIKIPEDIA, The Free Encyclopedia
  • 33. Thanks For Your Time Questions Comments
  • 34. THE END • “Whenever you are about to find fault with someone ask yourself the following question: What fault of mine most nearly resembles the one I am about to criticize?” Marcus Aurelius