Putative ZmGLK1 and ZmG2 target genes in rice. A to D) DAP-seq indicated that ZmGLK1 and ZmG2 preferentially bound to the promoters of OsSub57A), OsFtsH6B), OsCYP714B1C), and OsRCCRD). E to H) Expression levels of OsSub57E), OsFtsH6F), OsCYP714B1G), and OsRCCRH) in WT rice and in rice overexpressing ZmGLK1 or ZmG2 as determined with RNA-seq analysis. Gene expression was calculated in RPKM. I to L) Relative expression levels of OsSub57I), OsFtsH6J), OsCYP714B1K), and OsRCCRL) in WT, ZmUBIpro:ZmGLK1, and ZmUBIpro:ZmG2 rice under control conditions and after 7 d of drought stress as determined with RT-qPCR. Data are presented as the mean ± Sd from 3 biological replicates. *P < 0.05, **P < 0.01 (Student's t test).