The discovery, isolation, structure and function of systemin, ENOD40 (early nodulin 40), phytosulfokine and leginsulin are introduced in this paper.

• 本文简要介绍系统素、早期结瘤素、植物硫素、豆胰岛素等四种激素性多肽的发现与分离，以及其结构与生理作用。