Analysis of putative ASKβ-interacting genes. (A) Expression pattern analysis of ASKβ and co-expressed pollen development-related genes. (B) Sequence Logo of conserved Motif 1, which is annotated as POLLEN1LELAT 52 in PLACE database and is present in ASKβ and its 32 co-expressed genes. (C) Sequence Logo of the conserved Motif 3, which is annotated as MYB1AT in PLACE database and is present in all analyzed genes. (D) ASKβ expression levels in wild-type plants with respect to that in a corresponding mutant background (based on previous reports in Feng et al., 2012; Phan et al., 2011; Wijeratne et al., 2007; Xu et al., 2010; Yang et al., 2007; Zhu et al., 2008). (E) Expression levels of ASKβ and its six co-expressed genes in the tdf1 mutant background, according to data in the above references.