obsolete induction by organism of defense-related symbiont cell wall thickening true activation by organism of symbiont defensive cell wall thickening This term was made obsolete because it does not represent a real biological process. OBSOLETE. Any process by which an organism activates, maintains or increases the frequency, rate or extent of symbiont processes resulting in the thickening of its cell walls, occurring as part of the defense response of the symbiont organism. The symbiont is defined as the smaller of the organisms involved in a symbiotic interaction. biological_process induction by organism of defense-related symbiont cell wall thickening GO:0052394 activation by organism of symbiont defense-related cell wall thickening induction by organism of symbiont defensive cell wall thickening