Chemical diversity and antifouling activity of geniculate calcareous algae (Corallinales, Rhodophyta) from Brazil

PeerJ

article

Ellen A. de S. Oliveira¹  Juliana de A.S. Oliveira³  Priscila R. Araújo¹  Frederico T.S. Tâmega¹  Ricardo Coutinho¹  Angelica R. Soares¹ 

[1] Programa de Pós-Graduação em Biotecnologia Marinha, IEAPM/ Universidade Federal Fluminense;Departamento de Biotecnologia Marinha, Instituto de Estudos do Mar Almirante Paulo Moreira;Grupo de Produtos Naturais de Organismos Aquáticos, Universidade Federal do Rio de Janeiro;Department of Environmental Chemistry, Swiss Federal Institute of Aquatic Science and Technology

关键词: Geniculate calcareous algae;    Crude extract;    Chemical composition;    Metabolomics;    Multivariate analysis;    Biofouling;   

DOI  :  10.7717/peerj.15731

学科分类：社会科学、人文和艺术（综合）

来源: Inra

【 摘 要 】

Marine biofouling is a natural process by which many organisms colonize and grow in submerged structures, causing serious economic consequences for the maritime industry. Geniculate calcareous algae (GCA; Corallinales, Rhodophyta) produce bioactive secondary metabolites and are a promise for new antifouling compounds. Here, we investigated the antifouling activity of four GCA species—Amphiroa beauvoisii, Jania sagittata (formerly Cheilosporum sagittatum), Jania crassa, and Jania prolifera (formerly Amphiroa flabellata)—from the Brazilian coast against macro- and microorganisms. Simultaneously, metabolomic tools were applied to assess the chemical profiles of these seaweeds using gas chromatography coupled to mass spectrometry (GC-MS). Data analysis by principal component and molecular networking analyses used the global natural products social molecular networking platform (GNPS). Our results showed that all extracts were active against different strains of marine bacteria and that the J. sagittata (JsSI) extract showed the highest percentage of bacterial inhibition. The J. sagittata (JsSI) extract was the most active against the mussel Perna perna, showing 100% byssus inhibition. Regarding toxicity, only the J. crassa (JcP) extract showed a 20% mortality rate. The chemical profiles of the evaluated GCA extracts differed qualitatively and quantitatively. Yet, the steroid (3β)-cholest-5-en-3-ol was the major compound commonly identified in all extracts, with the exception of J. sagittata (JsSI). Moreover, we observed intra- and interspecific chemical variabilities among GCA extracts for the different populations, which could explain their antifouling activity variability. This study contributed new information about the chemical compounds produced by this group of seaweeds and showed its antifouling potential. These GCA species may be the subject of future studies to obtain new bioactive compounds with biotechnological potential in maritime areas.

【 授权许可】

CC BY