2.4.1. *Arabidopsis* Homologous Gene

The best candidate genes were used to search for the homologous gene in *Arabidopsis* from the Rice Genome Annotation Project database [17] and The *Arabidopsis* Information Resource [19]. *Arabidopsis* mutant lines with T-DNA insertion in the selected gene were ordered from the Arabidopsis Biological Resource Center (ABRC). The *Arabidopsis* seeds were screened for homozygous mutant lines via specific primers, LP and RP, to the gene of interest; the LB primer was used for a specific T-DNA region.
