library_construction_protocol: ChIP-seq was carried out on the 4-day-old etiolated seedlings of Col-0 and hls1-1 mutant by using anti-H3K9ac (A7255) and anti-H3K27ac (A7253), following a procedure as described (Zhu et al., 2024). Samples were harvested and cross-linked in 1% (v/v) formaldehyde under vacuum. The samples were then grinded in liquid nitrogen into fine powder to extracting nuclei. Nuclei purified by sucrose gradient separation were sonicated to generate about 500 bp genomic DNA fragments and then immunoprecipitated using beads incubating with different anti-bodies. Then the tagmentation and purification of ChIP products were described as the instruction book (Vazyme, TD501 and Qiagen, 28004).