“…In total, 16 Arabidopsis HDAC genes have been identified, of which 10 belong to the RPD3 superfamily, four to the HD2 family, and two to the SIR2 family (Pandey et al ., ). HDACs have been shown to regulate many aspects of plant development and responses to environmental changes (Luo et al ., ). For instance, HDA19, a RPD3 family member, is required for normal embryo development, photomorphogenesis, and lightâregulated gene expression (Benhamed et al ., ; Long et al ., ), and is involved in diverse stress responses (Zhou et al ., ; Kim et al ., ; Choi et al ., ).…”