Plocamium Plocamiaceae

One of the more thoroughly studied rhodophyte genera is Plocamium (Plocamiaceae), from which highly halogenated cyclic and acyclic compounds have been 

The terpene profile of plants from the three areas exhibited a good deal of variation, ranging from the richest arrays seen in plants from the northern sites, through highly heterogeneous arrays in plants from the central part of the range, to a comparatively simple array in plants from the Heron Island site. Only in the case of northern region were identical chemical profiles observed in plants from different sites (Milne and Telford Reefs). The data appear in Table 5.3. 

Tests of biological activity revealed that compound [480], whose complete structure was determined to be (15,25,4R,5R, 1 F)-2-bromo-1 -bromomethyl-1,4-dichloro-5-(2 -chloroethenyl)-5-methylcyclohexane by X-ray crystallographic analysis, is very toxic to Chlorella fusca under laboratory conditions. The other compounds 

The second example features R cartilagineum, a cold-water species that enjoys a wide distribution (Gabrielson and Scagel, 1989). Patterns of variation for halogenated monoterpenes have been reported for this species collected from several locations that include Atlantic, Pacific, and Antarctic waters. Both cyclic and acyclic 

Collection site Terpene class Acyclic Cyclic Reference 

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Platelet-derived growth factor, 1450 Platydesma, 734 Pleiospermium, 764 P388 leukemia, 982, 988, 996 Plinia cerrocampanensis, 2986 Plocamiaceae, 2891 Plocamiales, 2891 Plocamium... 

Coll, J.C., Skelton, B.W, White, A.H., and Wright, A.D. (1988) Tropical marine algae. II. The structure determination of new halogenated monoterpenes from Plocamium hamatum (Rhodophyta, Gigartinales, Plocamiaceae). Aust.J. Chem., 41,1743-1753. 

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