Cytokinin regulation by CRABS CLAW and SUPERMAN during Arabidopsis stamen formation

Termination of floral meristem activity (FM determinacy) at right timing is crucial to define floral organ numbers. Two transcription factors, CRABS CRAW (CRC) and SUPERMAN (SUP) play key roles in FM determinacy. CRC belongs to the YABBY family transcription factors, which contain a zinc finger and a helix-loop-helix domain. The crc mutation causes the formation of unfused carpels. In sensitized backgrounds, it leads to the increase in carpel numbers. On the other hand, SUP encodes a C2H2-type zinc finger protein. The sup mutants produce extra carpels and stamens. However, the genetic interaction between CRC and SUP has not been not fully understood. To understand genes controlled by these two factors, RNA-seq was performed.