title: Phylogenetic and chemical diversity of three chemotypes of bloom-forming lyngbya species (Cyanobacteria: Oscillatoriales) from reefs of southeastern Florida.
abstract: The cyanobacterial genus Lyngbya includes free-living, benthic, filamentous cyanobacteria that form periodic nuisance blooms in lagoons, reefs, and estuaries. Lyngbya spp. are prolific producers of biologically active compounds that deter grazers and help blooms persist in the marine environment. Here, our investigations reveal the presence of three distinct Lyngbya species on nearshore reefs in Broward County, FL, sampled in 2006 and 2007. With a combination of morphological measurements, molecular biology techniques, and natural products chemistry, we associated these three Lyngbya species with three distinct Lyngbya chemotypes. One species, identified as Lyngbya cf. confervoides via morphological measurements and 16S rRNA gene sequencing, produces a diverse array of bioactive peptides and depsipeptides. Our results indicate that the other two Lyngbya species produce either microcolins A and B or curacin D and dragonamides C and D. Results from screening for the biosynthetic capacity for curacin production among the three Lyngbya chemotypes in this study correlated that capacity with the presence of curacin D. Our work on these bloom-forming Lyngbya species emphasizes the significant phylogenetic and chemical diversity of the marine cyanobacteria on southern Florida reefs and identifies some of the genetic components of those differences.
authors.affiliation: Smithsonian Marine Station at Fort Pierce, 701 Seaway Drive, Fort Pierce, FL 34949, USA.
authors.forename: Koty
authors.initials: K
authors.lastname: Sharp
authors.forename: Karen E
authors.initials: KE
authors.lastname: Arthur
authors.forename: Liangcai
authors.initials: L
authors.lastname: Gu
authors.forename: Cliff
authors.initials: C
authors.lastname: Ross
authors.forename: Genelle
authors.initials: G
authors.lastname: Harrison
authors.forename: Sarath P
authors.initials: SP
authors.lastname: Gunasekera
authors.forename: Theresa
authors.initials: T
authors.lastname: Meickle
authors.forename: Susan
authors.initials: S
authors.lastname: Matthew
authors.forename: Hendrik
authors.initials: H
authors.lastname: Luesch
authors.forename: Robert W
authors.initials: RW
authors.lastname: Thacker
authors.forename: David H
authors.initials: DH
authors.lastname: Sherman
authors.forename: Valerie J
authors.initials: VJ
authors.lastname: Paul
mesh_terms: D044822:Biodiversity; D000458:Cyanobacteria / Q000737:chemistry / Q000145:classification* / Q000235:genetics / Q000302:isolation & purification*; D004269:DNA, Bacterial / Q000737:chemistry / Q000235:genetics; D004275:DNA, Ribosomal / Q000737:chemistry / Q000235:genetics; D047630:Depsipeptides / Q000032:analysis; D005431:Florida; D020459:Genes, rRNA; D008969:Molecular Sequence Data; D009842:Oligopeptides / Q000032:analysis; D010455:Peptides / Q000032:analysis; D010802:Phylogeny; D011759:Pyrrolidines / Q000032:analysis; D012329:RNA, Bacterial / Q000235:genetics; D012336:RNA, Ribosomal, 16S / Q000235:genetics; D012623:Seawater / Q000382:microbiology*; D017422:Sequence Analysis, DNA; D012689:Sequence Homology, Nucleic Acid; D013844:Thiazoles / Q000032:analysis
chemical_list: D004269:DNA, Bacterial; D004275:DNA, Ribosomal; D047630:Depsipeptides; D009842:Oligopeptides; D010455:Peptides; D011759:Pyrrolidines; D012329:RNA, Bacterial; D012336:RNA, Ribosomal, 16S; D013844:Thiazoles; C521548:dragonamide B; C530239:dragonamide C; C076335:microcolin A; C076336:microcolin B; C116945:curacin D