Disrupted mitochondrial function in dek10 kernels. (A) The most significantly-related GO terms of the 736 functional annotated DEGs. The significance and number of genes classified within each GO term is shown. (B) qRT-PCR confirmation of DEGs associated with mitochondrial function, including GRMZM2G125669 (Aox2), GRMZM2G010933 (Cytochrome c oxidase 17), GRMZM2G115049 (Porin), GRMZM2G064600 (Mitochondrial inner membrane translocase subunit), and GRMZM2G069229 (ATPase). Ubiquitin was used as an internal control. Values are the mean values with SEs, n = 6 individuals (***P < 0.001, Student’s t-test). (C) Ultrastructure of developing endosperms of WT and dek10 (18 DAP) for mitochondria observation. Bar, 1 μm. DAP, days after pollination; DEGs, differentially expressed genes; GO, gene ontology; ID, identifier; Mito, mitochondrion; PB, protein body; qRT-PCR; quantitative real-time PCR WT, wild type.