Abstract: The invention concerns the use of compounds selected among 1,4 ?-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 ?-D-glucanase enzyme; and/or as biofertilisers in applications related to their activity amplifying the 1,3 ?-D-glucanase enzyme, and/or the 1,4 ?-D-glucanase, and/or the xyloglucan endotransglycolase.

Abstract: This invention concerns the use of compounds selected among 1,4?-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?-D-glucanase enzyme, and/or the 1,4?-D-glucanase, and/or the xyloglucan endotransglycolase.

Abstract: The invention relates to the use of a compound comprising a polysaccharaide structure having formula XFG, or a derivative structure, in relation to adapting plants to abiotic stress, controlling flowering and fructification and inducing defence reactions against pathogens.

Abstract: The invention concerns the use of a compound comprising a polysaccharide structure of formula X1-X2-X3-(X4)n wherein: X1, X2, X3 and X4, independently of one another, represent a monosaccharide selected among glucose, galactose, xylose, fucose, or arabinose, the monosaccharide being optionally in reduced form and/or substituted, in particular by an alkyl or acyl group, such as a methyl or acetyl group; and n represents 0 or 1, for adapting plants to abiotic stress, flowering control, fructification control, and for inducing defense reactions against pathogens.