Tree trunk damaged by fungus

Tree trunk damaged by fungus

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Credit: ASTRID & HANNS-FRIEDER MICHLER/SCIENCE PHOTO LIBRARY

Caption: Fungal wood damage. Section through a spruce tree trunk, Picea sp. , showing damage caused by fungi. The fungi cause discolouration (black ring) and a weakening of the wood. The fungi responsible for this damage are Laetiporus sulphureus (Sulphur polypore) and Poria vaillantii. Spores typically enter the wood through injuries in the roots or bark. The body of the fungus grows outside the bark as the commonly seen "bracket" while the fine filamentous portions in the wood take nutrients from the tree. The tree is sufficiently weakened by such parasites that it may become unstable and fall, or be blown down in high winds.

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Keywords: botany, damage, damaged by fungus, disease, diseases, fungus, fungus damage, laetiporus sulphureus, nature, pathogens, pathology, plant, plant pathology, poria vaillantii, spruce, spruce wood, tree, tree trunk, wood, wood damage

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