Analysis of PPR-P Clade Genes and siRNAs.

(A) Abundance of small RNA size classes from clade PPR-P transcripts in various tissues and genotypes.

(B) Expression profile of 23 of the 28 PPR-P clade genes in Col-0, Ler, and 10 mutants with defects in silencing factors. Transcripts that yield at least one 21-nucleotide small RNA (red) or no small RNAs (teal) are color-coded. The list of PPR genes in the expression profile is as follows: At4g26800, At1g63070, At1g62670, At1g63130, At1g62930, At1g63080, At1g63320, At1g63150, At1g62590, At1g62910, At1g63400, At5g41170, At3g16710, At5g16640, At1g62720, At1g62680, At1g64580, At1g06580, At1g12700, At1g12620, At1g64100, At1g62860, and At1g63630.

(C) Comparison of small RNA reads and expression level of PPR-P genes that are targeted by miR161, miR400, and/or tasiRNAs from TAS1 or TAS2 loci.