Plant cell growth factors

摘要

The present invention relates to a peptide of the formula: wherein both of R<1> and R<2> represent SO3H, or either of R<1> or R<2> 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.