Abstract: PIN-FORMED (PIN) proteins work as auxin efflux proteins with multiple transmembrane domains and mediate auxin flow throughout the plant. As tomato is an important cash crop, studies aimed to regulate its growth and development are of great significance. Studies have shown that PIN proteins play an important role in regulating the growth and development of fruits. In this study, we predicted the characteristics of ten tomato PIN members by using on-line software, constructed a phylogenetic tree for SlPINs, and analyzed expression changes of SlPINs in different tissues and during fruit growth and development. This study will provide a basis for future study on the biological functions of SlPINs.

Key words: tomato fruit, PIN gene, bioinformatic analysis, expression pattern