LGALS9 and infection: GUS reporter gene assays in N. benthamiana leaves showed that simultaneous transient infection with 35S:MdZFP3, 35S:MdTPL4, and 35S:MdHDA19 enhanced the inhibitory effect of MdZFP3 on the ProMdPG1, ProMdPL5, ProMdβ‐Gal9, ProMdα‐AFase2, ProMdXET1, and ProMdEXP8 promoters.