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Creator:: Mohamed, Rozi, Meilan, Richard, Ostry, Michael E., Michler, Charles H., and Strauss, Steven H.
Abstract:: Overexpression of the bacterio-opsin (bO) gene in tobacco had previously been shown to induce hypersensitiveresponse- like lesions, increase viral and bacterial disease resistance, and stimulate pathogenesis-related gene expression. To see if this gene enhanced resistance to fungal pathogens of poplar, we generated a total of 35 transgenic lines in two...
Resource Type:: Article
Full Text:: enhanced resistance to fungal pathogens of poplar, we generated a total of 35 transgenic lines in two

Creator:: Ross, Darrell W. and Solheim, Halvor
Abstract:: Pole-size Douglas-fir (Pseudotsuga menziesii (Mirb.) Franco) were inoculated with two fungi (Ophiostoma pseudotsugae (Rumb.) von Arx and Leptographium abietinum (Peck) Wingf.) associated with the Douglas-fir beetle (Dendroctonus pseudotsugae Hopkins) to evaluate their pathogenicity. Pruning the lowermost 30% of the live crown had no effect on host tree defenses. Inoculation with...
Resource Type:: Article
Full Text:: (Ophiostoma pseudotsugae (Rumb.) von Arx and Leptographium abietinum (Peck) Wingf.) associated with the

Creator:: Acker, Steven A., Zenner, E. K., and Emmingham, W. H.
Abstract:: Green tree retention, a practice based on ecosystem science, has been integrated into forest management as a working hypothesis, requiring research and monitoring to quantify its effects. We undertook a retrospective study of natural, two-aged forest stands on the Willamette National Forest to provide preliminary estimates of the effects of...
Resource Type:: Article
Full Text:: Abstract: Green tree retention, a practice based on ecosystem science, has been integrated into forest

Creator:: Sillett, Stephen C. and Goslin, Matthew N.
Abstract:: Alternatives to clear-cutting are being implemented to increase biodiversity of managed forests in the Pacific Northwest. Lichens are an integral component of old growth, but lichen biomass develops slowly in forests. We evaluated the long-term potential of live tree retention for lichen conservation in Douglas-fir (Pseudotsuga menziesii (Mirb.) Franco) forests....
Resource Type:: Article
Full Text:: . Northwest Sci.70(Spec. Issue): 54–60. Sillett, S.C., McCune, B., Peck, J.E., Rambo, T.R., and Ruchty, A

Creator:: Lesser, Mark R., Cherry, Marilyn, and Parker, William H.
Abstract:: Previous laboratory and field studies have presented evidence for the existence of limestone ecotypes in white spruce (Picea glauca (Moench) Voss). Remeasurements of the range-wide 410 series of provenance trials were used for further evaluation of the existence of these ecotypes. In 2001, heights were measured of 23 provenances grown...
Resource Type:: Article
Full Text:: Investigation of limestone ecotypes of white spruce based on a

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