Natural resistance of sessile- (Quercus petraea agg.) and pedunculata oak wood (Quercus robur L.) against some stereoide fungi | Prirodna otpornost drveta hrasta kitnjaka (Quercus petraea agg.) i lužnjaka (Quercus robur L.) prema nekim stereoidnim gljivama
2009
Mirić, M., Šumarski fakultet, Beograd (Serbia) | Ivković, S., Šumarski fakultet, Beograd (Serbia)
The impact of the four stereoide fungi on the wood of sessile- and pedunculate oak has been investigated as follows: Stereum hirsutim, Chondrostereum purpureum, and Stereum rugosum known as oak sapwood white rot causers, as well as Xylobolus frustulatus as oak heartwood white - pocket rot (Partridge wood) causer. Samples of sessile- and pedunculate oak sapwood as well as heartwood, were exposed to developed dicariotic mycelia of tested fungi under controlled conditions during 8 weeks. Among the domestic broad-leaved trees in Serbia the oaks are the most important species - especially sessile oak and pedunculate oak, not only due to its' role as edificator in forest stands, but also due to its mechanical-, physical- and esthetical properties. The endangering of oak is emphasized just immediately after felling of stems, and sapwood- zone is especially sensitive. The heartwood- zone, which lost a basic physiological functions, is significantly more resistant owing to the presence of inhibitors (like as tannins), as well as the deficiency of moisture, oxygen and easy assimilable nutrients. Natural resistance of attacked wood has been tested in vitro by detection of mass loss due to fungal activity in controlled conditions.
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