title: Geographic Distribution of Natural Products Produced by the Red Alga Laurencia dendroidea J. Agardh.
abstract: In order to evaluate the chemical diversity of Laurencia dendroidea J. Agardh, a widely distributed seaweed in Brazilian coast, a phytochemical study was carried out with algae collected from six different locations along the Southeast Brazilian coast. Purified compounds were identified by MS and NMR techniques. The chemical profiles of lipophilic extracts were obtained by GC/MS for each population. In total, 15 compounds were described. The sesquiterpene composition accounted for 49 - 63% of the GC/MS chromatogram area. The discrimination of three chemotypes was done by the use of HCA on GC/MS chromatograms. They were also analyzed by the PCA and, together with peak area analysis, it was possible to discriminate all populations by the main variation of elatol, obtusol, rogiolol, and triquinane. The results revealed the high diversity of sesquiterpene composition among populations of L. dendroidea. Curiously, the within and among population variation of elatol and obtusol suggested a biochemical interplay on the content of these compounds. More studies are necessary to understand the patterns of chemical diversity and compound variation within and among populations of L. dendroidea.
authors.affiliation: Instituto de Química, Universidade Federal do Rio de Janeiro, Avenida Athos da Silveira Ramos, 149, Rio de Janeiro, RJ, Brazil.|Grupo de Produtos Naturais de Organismos Aquáticos (GPNOA), Núcleo de Estudos em Ecologia e Desenvolvimento Sócioambiental de Macaé, Universidade Federal do Rio de Janeiro, Av. São José do Barreto, 764, Macaé, RJ, Brazil.
authors.forename: Fernanda L S
authors.initials: FL
authors.lastname: Machado
authors.affiliation: Grupo de Produtos Naturais de Organismos Aquáticos (GPNOA), Núcleo de Estudos em Ecologia e Desenvolvimento Sócioambiental de Macaé, Universidade Federal do Rio de Janeiro, Av. São José do Barreto, 764, Macaé, RJ, Brazil.
authors.forename: Heitor M
authors.initials: HM
authors.lastname: Duarte
authors.affiliation: Grupo de Produtos Naturais de Organismos Aquáticos (GPNOA), Núcleo de Estudos em Ecologia e Desenvolvimento Sócioambiental de Macaé, Universidade Federal do Rio de Janeiro, Av. São José do Barreto, 764, Macaé, RJ, Brazil.
authors.forename: Lísia M S
authors.initials: LM
authors.lastname: Gestinari
authors.affiliation: Laboratório de Algas Marinhas Professor Édison José de Paula, Departamento de Botânica, Universidade de São Paulo, Rua do Matão, 277, São Paulo, SP, Brazil.
authors.forename: Valéria
authors.initials: V
authors.lastname: Cassano
authors.affiliation: Instituto de Química, Universidade Federal do Rio de Janeiro, Avenida Athos da Silveira Ramos, 149, Rio de Janeiro, RJ, Brazil.
authors.forename: Carlos R
authors.initials: CR
authors.lastname: Kaiser
authors.affiliation: Instituto de Química, Universidade Federal do Rio de Janeiro, Avenida Athos da Silveira Ramos, 149, Rio de Janeiro, RJ, Brazil.|Grupo de Produtos Naturais de Organismos Aquáticos (GPNOA), Núcleo de Estudos em Ecologia e Desenvolvimento Sócioambiental de Macaé, Universidade Federal do Rio de Janeiro, Av. São José do Barreto, 764, Macaé, RJ, Brazil.
authors.forename: Angélica R
authors.initials: AR
authors.lastname: Soares
mesh_terms: D001688:Biological Products / Q000032:analysis* / Q000737:chemistry* / Q000378:metabolism; D001938:Brazil; D044722:Laurencia / Q000737:chemistry / Q000378:metabolism*; D008968:Molecular Conformation; D025341:Principal Component Analysis
chemical_list: D001688:Biological Products
keywords: Chemotypes; Geographic distribution; Intraspecific variation; Laurencia dendroidea