Ulva lactuca Sea lettuce

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1 Ulva lactuca Sea lettuce S. Donovan Photo :

2 Ulva lactuca: Sea lettuce Domain: Kingdom: Phylum: Class: Order: Family: Genus: Species: (Species Detail, 2013) Eukaryota Plantae Chlorophyta Ulvophyceae Ulvales Ulvaceae Ulva U. lactuca

3 Domain: Kingdom: Phylum: Class: Order: Family: Genus: Species: Eukaryota Plantae Chlorophyta Ulvophyceae Ulvales Ulvaceae Ulva U. lactuca Domain: Eukaryota -Cells contain membrane bound organelles and a true nucleus

4 Domain: Eukaryota Kingdom: Plantae Phylum: Chlorophyta Class: Ulvophyceae Order: Ulvales Family: Ulvaceae Genus: Ulva Species: U. lactuca Kingdom: Plantae - united by the possession of a plastid derived from primary endosymbiosis ( Eukaryotes, 2013) - Autotrophs - Cell walls made of cellulose

5 Domain: Eukaryota Kingdom: Plantae Phylum: Chlorophyta Class: Ulvophyceae Order: Ulvales Family: Ulvaceae Genus: Ulva Species: U. lactuca Phylum: Chlorophyta Photosynthetic pigments: chlorophylls a and b store photosynthetic products as starch inside the doublemembrane-bounded chloroplasts in which it is produced Have cell walls made of cellulose (Raven et al., 1992).

6 Domain: Kingdom: Phylum: Class: Eukaryota Plantae Chlorophyta Order: Family: Genus: Species: Ulvophyceae Ulvales Ulvaceae Ulva U. lactuca Class: Ulvophyceae - Swimming cells with one or two pairs of flagella - cell division by furrowing with mitotic spindle closed, centric and persistent - thallus can be branched or unbranched, mono- or distromatic sheet (phyllose), or cushionlike forms of compacted tubes (Algaebase, 2013)

7 Order: Ulvales Family: Ulvaceae Genus: Ulva Species: U. lactuca Order: Ulvales - pseudoparenchymatous thalloid algae - characteristically found in marine and brackish waters - sheetlike thallus is formed by division in two planes of a filament - isomorphic alternation of generations in some species (Ulvales, 2013)

8 Domain: Kingdom: Phylum: Class: Order: Family: Genus: Species: Eukaryota Plantae Chlorophyta Ulvophyceae Ulvales Ulvaceae Ulva U. lactuca Family: Ulvaceae -thin flat or tubular green algae (Family Ulvaceae, 2013)

9 Domain: Kingdom: Phylum: Class: Order: Family: Genus: Species: Eukaryota Plantae Chlorophyta Ulvophyceae Ulvales Ulvaceae Ulva U. lactuca Genus: Ulva -green seaweed having a thallus two cells thick (Family Ulva, 2013)

10 Domain: Kingdom: Phylum: Class: Order: Family: Genus: Species: Eukaryota Plantae Chlorophyta Ulvophyceae Ulvales Ulvaceae Ulva U. lactuca Species: U. lactuca - thallus consists of large expanded sheet two cells in thickness - margin of thallus ruffled and wavy and folded - cross section of the thallus shows that the cells are isodiametric or vertically elongated to the thallus surface - Inconspicuous, disc-shaped holdfast (Ulva lactuca (a), 2013)

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12 Habitat Marine / brackish Estuaries / mangroves Flourishes in high nutrient conditions

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17 Anatomy Green Flat blade Two cell layers thick Sporophyte and gametophyte look the same (isomorphic)

18 Life Cycle Isomorphic Alternation of Generations: gametophytes sporophytes have the same form Anisogamous: gametes of unequal size

19 Interesting Facts and Human Connections Lots of common names: green laver (Eng) sea lettuce (Eng) meerlattich (Ger) laitue de mer (Fr) (Species Detail, 2013) Glasán (Irish) (Ulva lactuca (b), 2013)

20 Interesting Facts and Human Connections Likes lots of Nitrogen Grows all over the world in areas where freshwater runoff brings nitrogen into the marine environment

21 Interesting Facts and Human Connections Edible! Soups Salads Toasted

22 Recipes Sea Lettuce Soup 4 cups chicken stock 2 sheets Ulva 2 eggs Salt and pepper ½ tsp sesame oil 1 or 2 green scallions Bring stock to a boil. Add sea lettuce and stir. When sea lettuce is soft, stir in well- beaten eggs and boil for a few seconds then remove from heat. Add salt and pepper to taste. Add sesame oil, garnish with onion, and serve. (Deane, 2013) Toasted Sea Lettuce 6 sheets Ulva ½ tsp Salt 1 ½ tablespoon sesame oil Mix salt and sesame oil and rub a thin coat on sea lettuce. Lay 6 sheets on top of one another, roll them up and let them marinade for 5 minutes. Unroll and cook each sheet separately in a hot pan over low heat until crisp. Cut sheet into smaller pieces and serve with hot rice.

23 Works Cited: Algaebase. (2013). Taxonomy Detail : Class Ulvophyceae. Retrieved January 3, 2013, from Eukaryotes. (2013) Tree of Life Web Project. Web. 2 Jan < Family Ulvaceae. (2013) Dictionary, Encyclopedia and Thesaurus - The Free Dictionary. Web. 3 Jan < Genus Ulva (2013) Dictionary, Encyclopedia and Thesaurus - The Free Dictionary. Web. 3 Jan < Raven (1992) Deane, G. (2013) Sea Lettuce, Ulva. Eat The Weeds and other things, too. Web. 3 Jan < Species Detail : Ulva lactuca. (2013) Algaebase :Listing the World's Algae. Web. 3 Jan < Ulva lactuca (a). (2013) Seaweeds of the Central West Coast of India. Web. 3 Jan < Ulva lactuca (b). (2013) The Seaweed Site : information on marine macroalgae. Web. 3 Jan < Ulvales (2013). Dictionary of botany. Retrieved January 3, 2013, from

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