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Lessonia (alga)
''Lessonia'' is a genus of large kelp native to the southern Pacific Ocean. It is restricted to the southern hemisphere and is distributed along the coasts of South America, New Zealand, Tasmania, and the Antarctic islands. The genus was first described by Jean Baptiste Bory de Saint-Vincent in 1825. The genus name of ''Lessonia'' is in honour of René Primevère Lesson (1794–1849), who was a French surgeon, naturalist, ornithologist, and herpetologist. This is one of two principal genera in kelp forests (the other is ''Macrocystis''). In Chile, the preservation of ''Lessonia'' kelp is an important to help preserve the biodiversity that exists on rocky shores. By studying the harvesting of these wild populations of ''Lessonia'' kelp marine biologists are able to analyze the effects of this activity on wildlife. In New Zealand there are at least four species that belong to this genus. '' L. tholiformis'' is only found on the Chatham Islands. '' L. adamsiae'' is only found on ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lessonia Nigrescens
''Lessonia nigrescens'', the grey weed or giant grey weed, is a South American kelp species in the genus '' Lessonia''. There is at least two populations of the seaweed, marked by the difference in phenolic content. There is a subtidal population with higher phenol content and an intertidal population with a lighter phenol content. The difference in the phenolic content can be explained by the herbivory selection pressure due to the sea snail ''Tegula tridentata''. UV treatment induces the production of phlorotannins that accumulate in physodes. This weed contains the phytosterol saringosterol that shows an inhibitory effect on ''Mycobacterium tuberculosis ''Mycobacterium tuberculosis'' (M. tb) is a species of pathogenic bacteria in the family Mycobacteriaceae and the causative agent of tuberculosis. First discovered in 1882 by Robert Koch, ''M. tuberculosis'' has an unusual, waxy coating on its c ...'' growth.Inhibition of Mycobacterium tuberculosis growth by saringosterol ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Macrocystis
''Macrocystis'' is a monospecific genus of kelp (large brown algae). This genus contains the largest of all the phaeophyceae or brown algae. ''Macrocystis'' has pneumatocysts at the base of its blades. Sporophytes are perennial and the individual may live for up to three years; stipes/fronds within a whole individual undergo senescence, where each frond may persist for approximately 100 days. The genus is found widely in subtropical, temperate, and sub-Antarctic oceans of the Southern Hemisphere (e.g. Chile, New Zealand, Australia, Falkland Islands, Auckland Islands, etc.) and in the northeast Pacific from Baja California to Sitka, Alaska. ''Macrocystis'' is often a major component of temperate kelp forests. Description ''Macrocystis'' is a monospecific genus, the sole species is ''M. pyrifera''. Some individuals are so huge that the thallus may grow to up to 60 m (200 ft).C. van den Hoek, D.G. Mann and H.M. Jahns (1995) Algae An Introduction to Phycology'. Cambrid ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lessonia Variegata
Lessonia may refer to: * ''Lessonia'' (alga), a genus in the family Lessoniaceae * ''Lessonia'' (bird), a genus in the family Tyrannidae * ''Lessonia'', a synonym for '' Aglaura,'' a genus of hydrozoans {{genus disambiguation ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lessonia Vadosa
Lessonia may refer to: * ''Lessonia'' (alga), a genus in the family Lessoniaceae * ''Lessonia'' (bird), a genus in the family Tyrannidae * ''Lessonia'', a synonym for '' Aglaura,'' a genus of hydrozoans {{genus disambiguation ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lessonia Trabeculata
''Lessonia trabeculata'' is a species of kelp, a brown alga in the genus '' Lessonia''. It grows subtidally off the coasts of Peru and northern and central Chile, with the closely related ''Lessonia nigrescens'' tending to form a separate zone intertidally. Lessonia trabeculata kelp have gained a great economic importance for alginate production, and its harvest has greatly intensified along the Chilean coast during past two decades Description This kelp can grow to a length of . It is distinguished from all other members of the genus by the presence of trabeculae (cross struts) in the hollow centres of the blades and stipes (stems), and by the massive and irregular holdfast by which the kelp is attached to the rocks. Distribution and habitat ''Lessonia trabeculata'' occurs in the southeastern Pacific Ocean, in the subtidal zone off the coasts of Peru and northern and central Chile. Its range extends from Antofagasta to Puerto Montt and its depth range is between . It forms sub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lessonia Searlesiana
Lessonia may refer to: * ''Lessonia'' (alga), a genus in the family Lessoniaceae * ''Lessonia'' (bird), a genus in the family Tyrannidae * ''Lessonia'', a synonym for '' Aglaura,'' a genus of hydrozoans {{genus disambiguation ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lessonia Frutescens
Lessonia may refer to: * ''Lessonia'' (alga), a genus in the family Lessoniaceae * ''Lessonia'' (bird), a genus in the family Tyrannidae * ''Lessonia'', a synonym for '' Aglaura,'' a genus of hydrozoans {{genus disambiguation ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lessonia Corrugata
''Lessonia corrugata'' is a species of kelp, a brown algae in the genus '' Lessonia'', commonly known as strapweed, common crapweed, or Tasmanian kombu. It is a subtidal species endemic to Tasmania and southern Victoria, Australia, and is one of only three Laminarian kelps to occur in the region. It is most closely related to the New Zealand species ''Lessonia variegata''. The species was first described by Arthur Henry Shakespeare Lucas in 1931. ''Lessonia corrugata'' is a dominant species in some Tasmanian kelp forests, but remains poorly studied. It is currently being developed for aquaculture, to produce food and for environmental remediation purposes in IMTA finfish farms. Description ''Lessonia corrugata'' is a large, brown macroalgae that averages 1.5 m (0.5 ft) in length. It is characterised by distinct longitudinal corrugations on its blades that give the kelp its name. These blades arise from the holdfast via basal splitting and become long and linear as they grow. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lessonia Brevifolia
Lessonia may refer to: * ''Lessonia'' (alga), a genus in the family Lessoniaceae * ''Lessonia'' (bird), a genus in the family Tyrannidae * ''Lessonia'', a synonym for '' Aglaura,'' a genus of hydrozoans {{genus disambiguation ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Alginic Acid
Alginic acid, also called algin, is a naturally occurring, edible polysaccharide found in brown algae. It is hydrophilic and forms a viscous gum when hydrated. With metals such as sodium and calcium, its salts are known as alginates. Its colour ranges from white to yellowish-brown. It is sold in filamentous, granular, or powdered forms. It is a significant component of the biofilms produced by the bacterium ''Pseudomonas aeruginosa'', a major pathogen found in the lungs of some people who have cystic fibrosis. The biofilm and ''P. aeruginosa'' have a high resistance to antibiotics, but susceptible to inhibition by macrophages. Structure Alginic acid is a linear copolymer with homopolymeric blocks of (1→4)-linked β-D- mannuronate (M) and α-L- guluronate (G) residues, respectively, covalently linked together in different sequences or blocks. The monomers may appear in homopolymeric blocks of consecutive G-residues (G-blocks), consecutive M-residues (M-blocks) or alterna ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lessonia Adamsiae
Lessonia may refer to: * ''Lessonia'' (alga), a genus in the family Lessoniaceae * ''Lessonia'' (bird), a genus in the family Tyrannidae * ''Lessonia'', a synonym for '' Aglaura,'' a genus of hydrozoans {{genus disambiguation ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lessonia Tholiformis
Lessonia may refer to: * ''Lessonia'' (alga), a genus in the family Lessoniaceae * ''Lessonia'' (bird), a genus in the family Tyrannidae * ''Lessonia'', a synonym for '' Aglaura,'' a genus of hydrozoans {{genus disambiguation ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
