Fig. 4

Regulatory factors involved in potato tuberization. A Auxin, ABA, CK, and JA promote, whereas GA inhibits, tuberization. B Under high temperature, StTOC1 inhibits the expression of StSP6A by acting on microRNA. C StSP6A and StBEL5 produced in leaves are transported to the stolon stem tip as a movement signal to induce tuberization, and StCOL1/2 inhibits tuberization by inhibiting the accumulation of StSP6A and StBEL5 mRNAs in leaves