Transcription termination factor required for processing and steady-state levels of plastid transcripts. May play a role in response to abiotic stresses. Variegated leaves, reduced growth and altered structure of chloroplasts. Altered responses to sugars, abscisic acid (ABA), salt and osmotic stresses during seedling establishment (PubMed:25393651). Altered root and shoot meristem function resulting in reduced organ growth (PubMed:21599977). Belongs to the mTERF family.