cell wall polysaccharide catabolic process plant-type cell wall cellulose catabolic process The chemical reactions and pathways resulting in the breakdown of cellulose, a linear beta1-4 glucan of molecular mass 50-400 kDa with the pyranose units in the -4C1 conformation, which forms part of the cell wall. GO:0044348 jl plant-type cell wall polysaccharide breakdown 2011-07-28T01:48:23Z biological_process plant-type cell wall cellulose metabolic process