Peptides or their salts or solvates and their uses

Abstract

The purpose of this invention is to provide a peptide that promotes the expression of sucrose transporters and is useful for plant protection or increasing the sugar content of plants, and its uses. This invention relates to a peptide or its salt, or its solvate, wherein the peptide is any one of the following (A1) to (A4): (A1) A peptide composed of the amino acid sequence shown in Sequence Number 1; (A2) A peptide composed of an amino acid sequence formed by the deletion, substitution, or addition of 1 to 2 amino acids in the amino acid sequence shown in Sequence Number 1 and having a sucrose transporter-promoting effect; (A3) A peptide composed of an amino acid sequence having more than 90% sequence identity with the amino acid sequence shown in Sequence Number 1 and having a sucrose transporter-promoting effect; (A4) A peptide in which the N-terminus is acetylated and / or the C-terminus is acetylated in any of the peptides (A1) to (A3). none

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