Mediates the deacetylation of lysine residues on the N-terminal part of the core histones (H2A, H2B, H3 and H4). Histone deacetylation gives a tag for epigenetic repression and plays an important role in transcriptional regulation, cell cycle progression and developmental events (By similarity). Predominantly expressed in ovaries. Accumulates predominantly in the micropylar region of the ovule's integument. Expressed during fertilization, while it is repressed during seed development. By fertilization. Belongs to the histone deacetylase HD2 family.