A homogeneous, though multifaceted, secondary metabolic character emerges from a detailed investigation of secondary metabolites produced by the ciliate species Euplotes rariseta. In particular, from the strain NZ2, collected in New Zealand (Omaha Bay), two new irregular diterpenoids, omaholidenol (6) and omaholidenal (7), have been isolated which are the C 5 homologues of rarisetenolide (1), the latter being previously found as the main secondary metabolite in different strains of the same species. On the other hand, from strain Ubt22, three new diterpenoids, ubatubaolidenal (8), ubatubadial A (9), and ubatubadial B (10), have been found. Finally, two new diterpenoids, epoxyfocardolide (11) and prenyl epoxyrarisetenolde (12), were isolated in low yields from the sister species Euplotes quinquecarinatus and Euplotes parkei, respectively. All these findings strongly suggest, in addition to a wide chemical polymorphism in E. rariseta populations, a close parallelism between the production pattern of secondary metabolites and the phylogenetic relationships of the species, confirming the chemotaxonomic utility of these compounds in the ciliate genus Euplotes.

Diterpenoids from marine ciliates: Chemical polymorphism of Euplotes rariseta

Guella, Graziano;Callone, Emanuela;Mancini, Ines;
2012-01-01

Abstract

A homogeneous, though multifaceted, secondary metabolic character emerges from a detailed investigation of secondary metabolites produced by the ciliate species Euplotes rariseta. In particular, from the strain NZ2, collected in New Zealand (Omaha Bay), two new irregular diterpenoids, omaholidenol (6) and omaholidenal (7), have been isolated which are the C 5 homologues of rarisetenolide (1), the latter being previously found as the main secondary metabolite in different strains of the same species. On the other hand, from strain Ubt22, three new diterpenoids, ubatubaolidenal (8), ubatubadial A (9), and ubatubadial B (10), have been found. Finally, two new diterpenoids, epoxyfocardolide (11) and prenyl epoxyrarisetenolde (12), were isolated in low yields from the sister species Euplotes quinquecarinatus and Euplotes parkei, respectively. All these findings strongly suggest, in addition to a wide chemical polymorphism in E. rariseta populations, a close parallelism between the production pattern of secondary metabolites and the phylogenetic relationships of the species, confirming the chemotaxonomic utility of these compounds in the ciliate genus Euplotes.
27
Guella, Graziano; Callone, Emanuela; Mancini, Ines; F., Dini; G., Di Giuseppe
File in questo prodotto:
File Dimensione Formato  
EUROJOC_2012.pdf

Solo gestori archivio

Descrizione: Articolo principale
Tipologia: Versione editoriale (Publisher’s layout)
Licenza: Tutti i diritti riservati (All rights reserved)
Dimensione 659.83 kB
Formato Adobe PDF
659.83 kB Adobe PDF   Visualizza/Apri

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11572/93851
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 5
  • ???jsp.display-item.citation.isi??? 6
social impact