Distribution of the pigment caulerpin in species of the green alga Caulerpa

New Caulerpenyne-derived Metabolites of an Elysia Sacoglossan from the South Indian Coast

“…The known pigment caulerpin (6) was also isolated from the extract. Caulerpenyne (1) [15] and caulerpin (6) [17,18] were identified by comparison of their 1 H-NMR, mass spectra and [α] values with literature data. The new compounds 4 and 5, both structurally related to the main metabolite caulerpenyne (1), were characterized as described below.…”

“…expansa, it showed a secondary metabolite pattern dominated by caulerpenyne (1) [15] co-occurring with two novel minor metabolites, dihydrocaulerpenyne (4) and expansinol (5). A small amount of the pigment caulerpin (6), already isolated from several Caulerpa algae [17,18], was also detected in the extract. We report here the chemical characterization of compounds 4 and 5 using a variety of spectroscopic methods as well as by comparison with appropriate synthesized model compounds.…”

Concern about the spread of the invader seaweed Caulerpa taxifolia var. distichophylla (Chlorophyta: Caulerpales) towards the West Mediterranean

“…In this respect, it is worth noting that the harmful indole alkaloid caulerpin, produced by both the aquarium strain of C. taxifolia and by C. cylindracea, which is directly responsible for detrimental biological effects on native Mediterranean fauna (e.g. Felline et al, 2012), was not observed in Ctvd collected in its area of origin (Waterhouse Island, Australia) (Schwede et al, 1986). If confirmed for the Mediterranean populations, the absence of caulerpin might imply further biological differences between the two C. taxifolia alien strains, which might in turn correspond to different ecological effects on the resident biota.…”

Marine Bi-, Bis-, and Trisindole Alkaloids

“…104 Cleome serrulata yielded the first example of a troponoid-fused bisindole, which was given the trivial name caulersin (177) 105 (Figure 1.15 The distribution of 173 was assessed in several species of Caulerpa collected from the coasts of Bermuda, Florida, and Tasmania. 106 The Caulerpa genus has classically been divided into two major albeit tenuous groups, the frond-like bilateral leaf species, which grow below the littoral zone in relatively still water, and the radially branched species, which characteristically prefer habitats associated with the brighter shallower but turbulent littoral zone. 106 Schwede et al, 106 although aware of exceptions both in the literature and in their own data, proposed that 173 is mostly associated with radially branched Caulerpa species found in shallow water and is absent in most deepwater species with no significant seasonal variability.…”