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Norway spruce trees ( Picea abies (L.) Karst.) pretreated by wounding and fungal infection showed highly enhanced resistance to a subsequent challenge inoculation with the pathogenic bluestain fungus Ceratocystis polonica (Siem.) C. Moreau. This is the first time the effectiveness of the...
Pressure–volume curves and shoot water potentials were determined for black spruce ( Picea mariana (Mill.) BSP) trees from four full-sib families at the Petawawa Research Forest, Ontario, Canada. Trees were sampled from a dry site in 1992 and from the dry site and a wet site in 1993. Modulus of...
Transformation of in-vitro -derived shoots of Pinus ayacahuite Ehrenb. was achieved by co-culture with an oncogenic strain (A281 × 200) of Agrobacterium tumefaciens . During co-culture rooting also occurred; however, this rooting was not induced by genetic transformation of host cells, because a...
Foliar biomass investment in support and assimilative compartments was studied in four temperate deciduous tree species along a natural light gradient across the canopy. The species ranked according to shade tolerance as Betula pendula Roth. < Populus tremula L. < Fraxinus excelsior L. < Tilia...
Low water availability is a leading contributor to mortality of woody seedlings on grasslands, including those of the invasive shrub Prosopis . Increasing atmospheric CO 2 concentration could favor some genotypes of this species over others if there exists intraspecific variation in the...
We studied physiological (gas exchange and stomatal aperture) and morphological (individual leaf area and stomatal density) responses in leaves of five-year-old olive plants ( Olea europaea L. cvs. Frantoio and Moraiolo) exposed to filtered air containing < 3 ppb O 3 or 100 ppb O 3 for 5 h day...
Pressure–volume curves were determined for black spruce ( Picea mariana (Mill.) BSP) trees from four full-sib families. During the first two years, trees were measured from a plantation on a dry site. In the third year, trees were sampled from the dry site and a wet site. Diurnal measurements...
We used 20-mm-long, Granier-type sensors to quantify the effects of tree size, azimuth and radial position in the xylem on the spatial variability in xylem sap flux in 64-year-old trees of Taxodium distichum L. Rich. growing in a flooded forest. This information was used to scale flux to the...
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