 The Amylostereaceae are white rot pathogens . They <unk> the lignin of the host wood , whereby the infested wood parts become less stable and take a fibrous structure . The wood <unk> as fungal enzymes break down and remove the brown @-@ <unk> lignin . The distribution in wood takes place mainly along the transport channels in the <unk> . If the wood is <unk> , the red rot is vertically positioned , on which <unk> , infested areas contrast with intact wood . Symptoms of <unk> by the symbiotic partner — wood wasps — include circular exit holes in the crust and acute stress through <unk> , common in hanging , falling or tanning needles . 
