Plant growth factor

摘要

The present invention relates to a peptide of the formula: wherein both of R1 and R2 represent SO3H, or either of R1 or R2 represents SO3H and the rest represents H; Z represents an alpha -amino acid residue; X represents H or an acyl; and Y represents OH, C1-6 alkoxy or NH2, and to a plant growth promoter comprising the peptide.