Beta-1,3-glucanase inhibitors in Brazilian brown seaweed

Beta-1,3-glucanases are enzymes that hydrolyze beta-1,3-glucans, and they essential for the metabolism of seaweed, plants fungi. These also participate in digestion herbivore fungivore animals. Because importance these enzymes in insects, beta-1,3-glucanase inhibitors may be used development new control strategies against agricultural pests disease vectors. Beta-1,3-glucanase inhibitors have been described brown seaweed Laminaria cichorioides, but were never recorded Brazilian species. We evaluated presence beta-1,3- glucanase samples Padina gymnospora, Dictyota sp., Colpomenia sinuosa, and Lobophora collected Arraial d’Ajuda (Bahia). Ethanolic or buffer extracts used inhibition tests Trichoderma sp. Extracts buffer showed no inhibition, ethanolic from all species different extents inhibition. Samples P. gymnospora inhibitions above 75% (absolute ethanol) 50% (ethanol 50%). In summary, extraction with absolute ethanol resulted better inhibitions, higher inhibitions. good sources biochemical physiological studies enzymes. Besides that, molecules show potential new biotechnological tools insect control.