Resumen del producto

The endogenous polyamine (Pas) content of free and bound-acid soluble fractions was assessed in the epiphyte Bonnemaisonia hamifera under the presence of its host Gelidium arbuscula and of extracts obtained from G. arbuscula and from G. robustum. In the presence of fresh thalli of G. arbuscula the free putrescine (PUT) content decreased (P ‹ 0.05), while spermine and spermidine (SPD) showed a slightly increased concentration. The content of free PUT also decreased in all treatments with the different extracts and the dose. Bound-soluble PAs showed a different trend, particularly with the highest dose of ethanolic extract of G. robustum, PUT and SPD bound-soluble PA content increased significantly. Based on our results we infer that PAs are involved in the epiphytic relationship between macroalgae, and that PUT produces the greatest response of B. hamifera in the interaction with host and its extracts. The potential causes of its variation and its use for the production of secondary metabolites are discussed.

Palabras clave: seaweed; extracts; Polyamine; biotic relationships; epiphyte

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