Involved in chloroplast RNA processing. Can bind RNA (PubMed:11034340). Involved in chloroplast development (PubMed:21187014). Involved in chloroplast ribosomal RNA (rRNA) processing and/or translation. Required for FtsH-mediated chloroplast biogenesis (PubMed:20935174). Involved in translation and accumulation of chloroplast ATP synthase subunits (PubMed:23076438). Accumulates in discrete foci within the chloroplast. Expressed in leaves and flowers and at lower levels in stems and flower buds. Reduced plant size and pale-green leaf phenotype. Belongs to the PPR family. P subfamily.