Plants
Download
1 / 38

Plants - PowerPoint PPT Presentation


  • 200 Views
  • Uploaded on

Plants. The producers, Many are firmly rooted to the bottom of the sea…. STRUCTURE. Four types of algae Unicellular Colonial Filamentous Multicellular or macrophytic. Phylum Chlorophyta – Green Algae. Algae a.k.a. seaweed Kingdoms Protista & Chromalveolata. Algal Taxonomy.

loader
I am the owner, or an agent authorized to act on behalf of the owner, of the copyrighted work described.
capcha
Download Presentation

PowerPoint Slideshow about ' Plants' - kumiko


An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -
Presentation Transcript
Plants

Plants

The producers,

Many are firmly rooted

to the bottom of the sea….


Structure
STRUCTURE

Four types of algae

Unicellular

Colonial

Filamentous

Multicellular or macrophytic



Algae a.k.a. seaweed

Kingdoms Protista &

Chromalveolata


Algal Taxonomy

Eukaryotic Algae

single celled or multi-cellular, possess nuclear membrane, aquatic photoautotrophs, classified on chlorophyll, color, cell wall composition, food storage

Chlorophyta(green algae)

Phaeophyta (brown algae)

Rhodophyta (red algae)


Is algae in the kingdom Plantae?

A CLASSIFICATION DEBATE RAGES

MACROPHYTE ALGAE

LARGE PLANTS,

WHETHER AQUATIC OR MARINE…

Are red and brown algae still

classified as protists?




  • Chlorophylls a, b, c, d, e.

  • Each molecule functions at

  • specific wavelengths of light.

  • 2. Carotenes:

  • carotene B- found in all three divisions

  • xanthophylls- 20 different types of pigments and two types:

    • fucoxanthin- found only in phaeophyta

    • lutein- common pigment in all large algae

  • 3. Phycoblins:

  • phycocyanin- blue pigment

  • phycorethrin- pink-red pigment found in

  • rhodophytaand cyanobacteria



  • Phylum chlorophyta green algae
    Phylum Chlorophyta –Green Algae

    • Pigments:

      • Chlorophylls a and b,

      • ß-carotene and various xanthophylls

    • Walls of cellulose

    • Food reserves:

      • true starch, fats and oils

    • Eukaryotic algae:

      • membrane-bound organelles

    • Flagella:

      • 2 or 4


    Phylum chlorophyta green algae distribution and habitats
    Phylum Chlorophyta –Green AlgaeDistribution and habitats

    • Common in ponds, ditches etc.

    • Attached to rocks or free floating

    • 90% are fresh water species

    • Often in brackish water

    • Shallow, nutrient-rich water

    • Important marine algae in tropics

    • May be symbiotic, lichens (algae + fungus)


    Halimeda opuntia

    Caulerpa sertularioides

    Phylum Chlorophyta – Green Algae

    Codiumedule

    Caulerparacemosa

    Dictyosphaeria cavernosa


    Chaetomorpha

    Bryopsi


    Chara
    Chara

    Volvox colony



    Reproduction
    REPRODUCTION

    MOST REPRODUCE BOTH SEXUALLY AND ASEXUALLY

    • Most sexual reproduction is triggered by environmental stress

    • Asexual Reproduction

      • Mitosis

    • Sexual Reproduction

      • Meiosis

      • Zoospores

      • Plus and minus gametes

      • Zygospore


    Water molds
    Water Molds


    Kingdom Chromalveolata

    Division Heterokontophyta:

    Phylum Phaeophyta – Brown Algae


    Phylum phaeophyta
    Phylum Phaeophyta

    • 1500 species of Brown algae

    • Mostly marine and include seaweed and kelp

    • All are multicellular and large (often reaching lengths of 147 feet)

    • Individual alga may grow to a length of 100m with a holdfast, stipe and blade

    • Photosynthetic pigments

      • chlorophyll a &c

      • carotenoids

      • xanthophylls (e.g. fucoxanthin)


    Padina japonica

    Turbinaria ornata

    Phaeophyta: Brown Algae

    Hydroclathrus clathratus

    Sargassumpolyphyllum

    Sargassum echinocarpum


    Algal macrophyte structure


    BrownAlgae

    Macrocystis -- Kelp



    Brown algae

    Egregia

    Postelsi

    Laminaria


    Phylum Rhodophyta

    Photosynthetic Pigments

    chlorophyll a

    carotenoids

    phycobilins

    Mostly multicellular, marine forms.

    Abundant in warm, tropical coastal waters.

    Not all are red in color


    Kingdom protista phylum rhodophyta
    Kingdom Protista Phylum Rhodophyta

    • 4000 species of RED Algae

    • Most are marine

    • Smaller than brown algae and are often found at a depth of 200 meters.

    • Contain chlorophyll a and C as well as phycobilins which are important in absorbing light that can penetrate deep into the water

    • Have cells coated in carageenan which is used in cosmetics, gelatin capsules and some cheeses


    Phylum rhodophyta calcareous algae
    Phylum RhodophytaCalcareous algae


    Hypneachordacea

    Ahnfeltiaconcinna

    Acanthophoraspicifera

    Galaxaurafastigiata

    Phylum Rhodophyta

    Asparagopsistaxiformis


    Phylum Rhodophyta – Red Algae


    Phylum Rhodophyta – Red Algae

    Corallin

    Mazzaella

    Palmari


    Harvesting

    from the sea



    Food Source in Hawaii

    7000 species altogether in world’s oceans

    600 different species of algae in Hawaii

    Limu were important to early Hawaiians

    More than 70 different kinds were used

    Eaten fresh

    used as spices or medicines

    used in religious ceremonies in Hawaii


    Algal Products

    Certain alga can be used to make agar or as stabilizer in gelatin and ice cream:

    Use: sugar, milk, irish moss or euchima, Chondrus, Porphyra and Rhodymenia- blend and boil.

    • Thickener and help smooth these items:

    • Many foods and milk-products

    • Toothpaste

    • Beauty creams

    • Paints

    • Medical products- like bacterial culture plates, time-release pills, and dental impression gels


    Phycocolloids

    Carrageenan from red algae

    Algin from brown algae


    phycocolloids from red and brown algae


    ad