Presumably, it was Pba enzymes that cleaved Gal side chains of RG-I since three Pba β-galactosidase/endo-β-1,4-galactanase genes were upregulated in planta (Table S3) and none of plant β-galactosidase genes were upregulated during the infection, while most of them were downregulated (Table S2). The gene discussed is GAL; the disease is infection.