TY - GEN T1 - The root hair defective phenotype of Arabidopsis thaliana Pol IV subunit mutant nrpd1a-3 is associated with a deletion in RHD6 AU - David, Rakesh AU - Kortschak, R. Daniel AU - Searle, Iain DO - 10.17912/micropub.biology.000196 UR - http://beta.micropublication.org/journals/biology/micropub-biology-000196/ AB - In eukaryotes, RNA and chromatin-based pathways control transposable elements (TE) to minimize the deleterious consequences of genetic invasion, transposition, mutation and chromosome instability (Matzke and Mosher, 2014). In higher plants, the multi-subunit nuclear RNA polymerase IV (Pol IV) specializes in transcribing the 24 nucleotide class of small RNAs that target TE’s for DNA cytosine methylation and silencing in the RNA-directed DNA methylation (RdDM) pathway (Herr et al., 2005; Onodera et al., 2005). In Arabidopsis, the Pol IV has two alternative subunits encoded by the NRPD1a and NRPD1b and a common subunit encoded by NRPD2A (Herr et al., 2005; Kanno et al., 2005; Onodera et al., 2005; Pontier et al., 2005). The null mutant for NRPD1a is defective in the RdDM pathway and also displays a late flowering phenotype under short day conditions (Pontier et al., 2005; Eamens et al., 2008). PY - 2019 JO - microPublication Biology ER -