Sulfated polysaccharides from Bryopsis plumose. Comparison with those of other Bryopsidales (Chlorophyta)

P. V. FERNÁNDEZ, A. S. CEREZO, J. M. ESTEVEZ, M. CIANCIA

Ensenada, Mexico

Simposio; XX International Seaweed Symposium; 2010

Internation Seaweed Asociation

In the last few years we characterized the sulfated polysaccharides from some green seaweeds of different families from the Bryopsidales:  Codium fragile and C. vermilara (Codiaceae), Bryopsis plumosa (Bryopsidaceae) and Penicillus capitatus (Udoteaceae). All of them biosynthesize highly ramified sulfated b-D-galactans with some distinct characteristics. Besides, a heavily sulfated 3-linked linear pyranosic arabinan (>50 %, as SO3Na) and a 4-linked b-D-mannan partially sulfated on C-2 were also isolated from Codium sps.; a sulfated rhamnan, similar to that found by other group in Gayralia oxysperma (Ulvales), was identified in B. plumosa. On the other hand, in P. capitatus, a calcareous alga, the yield in sulfated polysaccharides is extremely low and only galactans were detected in significant quantities, which differ greatly in structure from those of the other species. Yo agragria un comentario como para cerrar el resumen” Based in our studies, cell walls in the green seaweeds of Bryopsidales group showed an amazing chemical polymers diversity and innovation that is remarkably different from other green seaweeds groups”.