Polypeptide useful for promoting growth of plant cell comprises phytosulfokin precursor polypeptide of specific amino acid sequence originating from rice plant

摘要

Precursor polypeptide (I) of phytosulfokin of rice plant origin consists of a sequence of 89 amino acids (or a sequence where 1 or more amino acids are replaced or deleted) given in the specification. Sulfuration of tyrosine residual group of phytosulfokin is capable of stimulating growth by secreting sulfated tyrosine phytosulfokin. Independent claims are also included for the following: (1) a gene encoding (I); and (2) plant transformed with gene encoding (I)