Phylum Bryophyta (mosses)
•Download as PPTX, PDF•
10 likes•11,219 views
This document provides an overview of the phylum Bryophyta, commonly known as mosses. It discusses their general characteristics, including that they are small eukaryotic plants that lack vascular tissues and reproduce using spores. The document describes the three main classes of mosses - Sphagnopsida, Andreaeopsida, and Bryopsida - and provides details on their morphology, life cycles, and habitats. Finally, it covers the economic and ecological importance of mosses, such as their uses for fuel, decoration, and soil conditioning.
Recommended
More Related Content
What's hot
What's hot (20)
Similar to Phylum Bryophyta (mosses)
Similar to Phylum Bryophyta (mosses) (20)
More from Fasama H. Kollie
More from Fasama H. Kollie (20)
Recently uploaded
Recently uploaded (20)
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
- 13. Examples of Sphagnum Mosses
- 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
- 15. Class Sphagnopsida: Life Cycle
- 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
- 23. Moss Life Cycle
- 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
- 29. Ecological Importance of Mosses They are use for: • Soil Conditioning • Primary Producer • Garden
- 30. 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