Use of glycuronic polysaccharides and oligosaccharides as phytosanitary products and/or fertilizers

Abstract

The invention concerns the use of compounds selected among 1,4 β- D -glucuronans, and/or glycuronic polysaccharides derived from polymers of formula (I), and whereof the number of saccharide units is less than about 30, and/or esters and/or ethers corresponding to polymers of formula (I) or said oligosccahride derivatives, as phytosanitary products in applications related to their activity for amplifying the 1,3 β- D -glucanase enzyme; and/or as biofertilisers in applications related to their activity amplifying the 1,3 β- D -glucanase enzyme, and/or the 1,4 β- D -glucanase, and/or the xyloglucan endotransglycolase.

1 . Oligo 1,4 β- D -mannuronans of DP 4.  
     
     
         2 . Oligo. 1,4 β-D-mannuronans of DP 4 according to  claim 1  such as as obtained by hydrolysis of an alginate with an alginate-lyase of ormer origin, the oligo-1-4, βD-mannuronans of DP 4 being separated according to DP by gel-permeation chromatography, and are then purified by ionic chromatography in high-pressure liquid chromatography.