Abstract
Arabidopsis NODULIN HOMEOBOX (NDX) is a plant-specific transcriptional regulator whose role in small RNA biogenesis and heterochromatin homeostasis has recently been described. Here we extend our previous transcriptomic analysis to the flowering stage of development. We performed mRNA-seq and small RNA-seq measurements on inflorescence samples of wild-type and ndx1-4 mutant (WiscDsLox344A04) Arabidopsis plants. We identified specific groups of differentially expressed genes and noncoding heterochromatic siRNA (hetsiRNA) loci/regions whose transcriptional activity was significantly changed in the absence of NDX. In addition, data obtained from inflorescence were compared with seedling transcriptomics data, which revealed development-specific changes in gene expression profiles. Overall, we provide a comprehensive data source on the coding and noncoding transcriptomes of NDX-deficient Arabidopsis flowers to serve as a basis for further research on NDX function.
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