Component of the m6A writer complex; HAKAI is required for the interaction between HIZ1 and MTA (mRNA adenosine methylase A). Likely the plant equivalent of ZC3H13 (Flacc) of the metazoan m6A-METTL Associated Complex. Retarded growth, reduced apical dominance and small and bushy rosette leaves; shorter primary roots and nearly no lateral roots; mutants have increased percentage of trichomes with more than three branches.