NOVELTY - A method (M1) for enhancing cell wall property in perennial plant or portion of the perennial plant involves: introducing into perennial plant or portion of perennial plant, at least one nucleotide construct comprising nucleic acid molecule operatively linked to a regulatory region active in the plant, where nucleic acid molecule encodes polypeptide with galactinol synthase (GolS)-like activity; and growing the plant or portion of plant under conditions that permit expression of nucleic acid, thereby enhancing cell wall property of plant or portion of plant.    USE - For enhancing cell wall property in a perennial plant or portion of the perennial plant, where the perennial plant is a tree; for altering level of carbohydrates in a perennial plant used in solid wood, pulp and paper, dissolving pulp industry, and/or biofuel industry and in feedstock or foodstuff. The cell wall property includes increased cell wall density, decreased microfibril angle, increased wood density, altered cellulose crystallinity, increased tension wood formation, increased cellulose content, reduced lignin content, altered lignin monomer composition, modified hemicellulose matrix, and/or modified pectin matrix (claimed).    ADVANTAGE - Using the method, the level of total hexose is increased and/or the level of pentose is decreased, when compared to the same parameter determined in the plant or portion of the plant of the same species, grown under the same conditions, and where the plant or portion of the plant is not transformed with a nucleic acid molecule that encodes a polypeptide with galactinol synthase (GolS)-like activity. Using the method, the level of galactose and/or glucose is increased and/or the level of xylose is decreased when compared to the same parameter determined of the plant or portion of the plant of the same species, grown under the same conditions and where the plant or portion of the plant is not transformed with a nucleic acid molecule that encodes a polypeptide with galactinol synthase (GolS)-like activity.    DETAILED DESCRIPTION - A method (M1) for enhancing cell wall property in a perennial plant or portion of the perennial plant involves: a) introducing into the perennial plant or portion of the perennial plant, at least one nucleotide construct comprising a nucleic acid molecule operatively linked to a regulatory region active in the perennial plant, where the nucleic acid molecule encodes a polypeptide with galactinol synthase (GolS)-like activity; and b) growing the perennial plant or portion of the perennial plant under conditions that permit the expression of the nucleic acid, thereby enhancing the cell wall property of the perennial plant or portion of the perennial plant. INDEPENDENT CLAIMS are included for the following:    (1) a method (M2) for altering level of carbohydrates in a perennial plant or portion of a perennial plant involving introducing into the plant or a portion of the plant, at least one nucleotide construct comprising a nucleic acid molecule operatively linked to a regulatory region active in the plant, where the nucleic acid molecule encodes a polypeptide with galactinol synthase (GolS)-like activity; and growing the plant or portion of the plant under conditions that permit the expression of the nucleic acid, thereby altering the level of carbohydrates in the plant or portion of the plant;    (2) a perennial plant produced by the method (M1) or (M2);    (3) a perennial plant, portion of a plant or plant cell comprising a nucleic acid comprising a nucleotide sequence encoding a polypeptide with galactinol synthase (GolS)-like activity operatively linked to a regulatory region active in a plant;    (4) a feedstock or foodstuff comprising the perennial plant, portion of the plant or plant cell;    (5) new nucleic acid comprising a nucleotide sequence encoding a polypeptide with galactinol synthase (GolS)-like activity operatively linked to a regulatory region active in a plant, where the polypeptide is encoded by any one sequence selected from SEQ ID No. 16 containing 331 amino acids, SEQ ID No. 17 containing 331 amino acids, SEQ ID No. 18 containing 334 amino acids, SEQ ID No. 19 containing 322 amino acids, SEQ ID No. 20 containing 333 amino acids, SEQ ID No. 21 containing 335 amino acids, SEQ ID No. 22 containing 338 amino acids, SEQ ID No. 23 containing 323 amino acids, SEQ ID No. 24 containing 334 amino acids, SEQ ID No. 25 containing 332 amino acids, SEQ ID No. 38, as given in the specification and SEQ ID No. 45, as given in the specification; and    (6) a method for producing a feedstock for use in pulp and paper or biofuel production involving providing a perennial plant comprising at least one nucleotide construct comprising a nucleic acid molecule operatively linked to a regulatory region active in the perennial plant, where the nucleic acid molecule encodes a polypeptide with galactinol synthase (GolS)-like activity; and growing the perennial plant under conditions that permit the expression of the nucleic acid, thereby producing the feedstock.