In surface view, the cells are usually hexagonal or pentagonal in shape, which remain loosely arranged. The sea lettuce can be eaten raw in salads but it can also be cooked into soups. Its enzymatic degradation by the action of a fungal glucuronan lyase (Delattre et al., 2006) resulted in the formation of a series of unsaturated oligosaccharides (Elboutachfaiti et al., 2009), which may be used (probably, after appropriate chemical modification) as elicitors of defence-related responses in plants (Caillot et al., 2012). Seasonal fluctuations of protein, neutral sugars or uronic acid’s content in seaweeds were previously reported in relation with species, geographic areas with values between 11 and 55% ash, 15–65% carbohydrates, 4–44% proteins and 0.3–1.6% lipids (%DW) (Holdt & Kraan, 2011). Sea lettuce can be served cold with dressing and other vegetables for a healthy salad. Seaweeds, including sea lettuce, are good sources of iodine which helps stimulate and maintain the proper functioning of the thyroid gland. Small amounts of sulfate groups are found at position two of the xylose residue while most of them are located in position three of the rhamnose unit (Lahaye et al., 1999; Lahaye and Robic, 2007). Having a bland taste somewhat like salty lettuce, sea lettuce is easily found in on coastlines, especially in tide pools or in rocky intertidal areas. It grows rapidly in the summer and dies off, often washing up on the beach. Get the latest updates on our work delivered to your inbox. This leafy, bright green seaweed can be eaten in salads or added to soups. Ulva or sea lettuce is also high in iron, iodine, manganese, aluminum, and nickel. 3.6). (2004) studied an aqueous extract from Ulva reticulata against acetaminophen-induced hepatotoxicity in Wistar rats. Sea lettuce is also used in the aquarium trade, along with other members of the genus Ulva, various of which are sometimes also known as sea lettuce or similar names. Cell division in Ulva always occurs in a plane perpendicular to the thallus surface. However, the structure of ulvan will strongly influence the rheological properties, e.g., high amounts of uronic acid (∼30%) negatively affect the viscosity of ulvan (Siddhanta et al., 2001). As the patch of sea lettuce grows, it stores nutrients. It also thrives from any other source of fresh water meeting salt water, such as sewage runoff or industrial waste, both bad places from which to gather. Water-soluble polysaccharides of the algae belonging to the genus Monostroma resemble ulvan by high content of L-rhamnose and sulfate, but uronic acids content is usually much lower indicating a different type of structure. It is also known as, Lahaye and Robic, 2007; Jaulneau et al., 2010, Six-membered Rings with One Heteroatom, and their Fused Carbocyclic Derivatives, Macroalgal mats in a eutrophic estuarine marine protected area, Chemical structures of algal polysaccharides, Functional Ingredients from Algae for Foods and Nutraceuticals, Kevin Hardouin, ... Nathalie Bourgougnon, in, De Casabianca, Barthelemy, Serrano, & Sfriso, 2002, PLANTS AND THE ENVIRONMENT | Plants as Pollution Monitors, Antioxidant properties of algal components and fractions. From a nutritional standpoint, the main properties of sea lettuces are their richness in polysaccharides, protein and amino acids, fatty acids, minerals, and vitamins. Several bioactivities were reported for ulvan such as an antioxidant activity (Qi et al., 2005) and a potential antihyperlipidemic activity (Pengzhan et al., 2003). People who eat sea vegetables can enjoy the following health benefits: Weight control. All Rights Reserved. Sea letuce doesn't rea. One hundred Ulva species are currently listed in the world (Algaebase). Marked seasonal variations can be seen in the morphology of Ulva, ie, young plants are dark green in color and soft to the touch, whereas older thalli become light green and their surface becomes slimy. Sea lettuce, also known as green laver, can be found in the seas around the world where it grows close to shore. (Lahaye et al., 1997). Reproductive regions accumulate a specific carotene and appear green to olive-green to brownish green (Hiraoka et al., 1998). Sea lettuce products could be used for food fortification, enrichment, and multipurpose applications. Habitat: High and low intertidal zones; water to 75 feet deep. It grows to be 6 to 24 inches and usually grows in large masses. Green: Adults are referred to as herbivores although as hatchlings they are omnivores. It is sometimes known as green laver. Food preparations from sea lettuces worldwide may be studied to increase sea lettuce utilization. Seaweeds, including sea lettuce, are good sources of iodine which helps stimulate and maintain the proper functioning of the thyroid gland. During the summer, parts of Boston Harbor cove can be covered in this species. In Brittany in France, the opportunistic growth ability of Ulva is associated with proliferation in eutrophicated coastal waters or with contamination of algal closed cultures (Lahaye & Robic, 2007). These results suggest that ulvan could be exploited as a new source of water-soluble gelling polysaccharides. These algae contain a water-soluble polysaccharide, ulvan, which represents about 8–29% of the algae dry weight (Lahaye and Robic, 2007). The chemical structure of ulvans was elucidated mainly by identification of different products of their partial depolymerization. During this process, bacteria consume oxygen until there is little or none left in these bottom waters.
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