ACKNOWLEDGEMENT
We thank Dr. Yutaka Kodama (Utsunomiya University) for generous gifts of vectors and technical assistance of BiFC analysis. We thank Dr. Yasuo Niwa (University of Shizuoka, Japan) for a generous gift of vector of GFP analysis. We thank Dr. Masaki Endo (National Agriculture and Food Research Organization) for generous gifts of vectors and technical assistance of CRISPR/Cas9. We thank Dr. Ryoko Kusakabe and Prof. Masaaki Miyamoto (Kobe University) for technical assistance of LC-MS analysis. We thank Dr. Ryu Fujimoto (Kobe university) for technical assistance of ChIP analysis.