May act as the scaffold of a protein complex, which sequesters key factors that are required for the G2 to M transition in meristematic tissues (By similarity). Together with REC2, REC3 and FMT/CLU, contributes to the establishment of the cellular volume devoted to the chloroplast compartment (PubMed:26862170). Excluded from the nucleus upon treatment with amitrole, which inhibits cell expansion and chloroplast function. Reduced proportion of the cellular volume devoted to chloroplasts leading to an abnormal chloroplasts distributions (PubMed:26862170). Inhibited far-red block of seedlings greening associated with reduced levels of chlorophyll and chlorophyll a/b-binding proteins of photosystem II (e.g. Lhcb1.2) (PubMed:26862170). Lower levels of chlorophyll, especially in plants lacking REC1, REC2, REC3 and FMT/CLU (PubMed:26862170).