The tuberization signal StSP6A represses flower bud development in potato.

Potato (Solanum tuberosum L.) can reproduce sexually through flowering and asexually through tuberization. While tuberization has been thoroughly studied, little research has been done on potato flowering.

Coincidence of potato CONSTANS (StCOL1) expression and light cannot explain night-break repression of tuberization.

In the obligate short-day potato Solanum tuberosum group Andigena (Solanum andigena), short days, or actually long nights, induce tuberization. Applying a night break in the middle of this long night represses tuberization. However, it is not yet understood how this repression takes place.