Factors Influencing Alginate Degradation by the Marine Fungi: Dendryphiella salina and D. arenaria

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Abstract
Alginate degradation was confirmed for D. salina (Sutherland) Pugh et Nicot and demonstrated for the 1st time for D. arenaria Nicot. Breakdown of the polysaccharide by D. salina occurred between 10.degree.-40.degree. C, and increased with increasing temperature. NaCl (up to 3% wt/vol) stimulted degradation by D. salina but depressed the depolymerizing ability of D. arenaria. The process was optimal for both species at pH 6.0, and was stimulated by CaCl2; MgCl2 and NaH2PO4. The marine fungus Asteromyces cruciatus Moreau et Moreau ex Hennebert and a non-marine species of Dendryphiella (D. interseminata (Berk. et Rav.) Bubak et Ranojevic) were, however, incapable of degrading alginate, confirming that this ability is characteristic of only a limited number of fungi.