Laboratoires Goemar S.a.

Bertrand Plesse

Jean-Claude Yvin

Bernard Cloarec

Bernard Fritig

Jean-Marie Joubert

Tristan Barbeyron

Christophe Richard

Florence Cruz

Marguerite Kopp

Olivier Klarszinsky

Valérie Descamps

The invention concerns endofucanases suitable for preparing fuco-oligosaccharides by enzymatic hydrolysis of fucanes. It also concerns a bacterium producing endofucanases and the preparation of said enzyme from the bacterium. It further concerns endofucanase genes and it finally concerns the use said fuco-oligosaccharides for plant protection.

Endofucanases and method using same for preparing fuco-oligosaccharides from fucanes, bacterium producing endofucanases and uses of fuco-oligosaccharides for plant protection

The present invention provides a method to potentiate and stimulate natural defensive reactions of plants to a pathogenic agent. The method comprises application to plants of a composition comprising an effective amount of one or more oligo &bgr; 1-3 glucans composed of 3 to 250 monosaccharide units and a vehicle, wherein the effective amount of oligo &bgr; 1-3 glucans in the composition does not directly stimulate natural defensive reactions of plants when the pathogenic agent is absent.

Method for stimulating natural control system of plants

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Strasbourg, France

Bertrand Plesse