Lophodermella sulcigena infection in Scots pine needles and tree nutrition
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چکیده
منابع مشابه
Defoliating Insect Mass Outbreak Affects Soil N Fluxes and Tree N Nutrition in Scots Pine Forests
Biotic stress by mass outbreaks of defoliating pest insects does not only affect tree performance by reducing its photosynthetic capacity, but also changes N cycling in the soil of forest ecosystems. However, how insect induced defoliation affects soil N fluxes and, in turn, tree N nutrition is not well-studied. In the present study, we quantified N input and output fluxes via dry matter input,...
متن کاملPartitioning of carbohydrates and biomass of needles in Scots pine canopy.
The study was aimed at the quantitative evaluation of the temporal and spatial partitioning of non-structural carbohydrates and needle biomass in a canopy of Scots pine (Pinus sylvestris L.) growing in a Myrtillus site type forest stand (predominant in Estonia). The tree canopy was divided into ten equal layers and the material for the spatial partitioning of the investigated characteristics wa...
متن کاملMultiple forms of extracellular superoxide dismutase in needles, stem tissues and seedlings of Scots pine
which is involved in lignification of cell walls (Dean and Eriksson, 1992), defence reactions against microbial infecExtracellular superoxide dismutase was found in extrations (Levine et al., 1994) and cross-linking of structural xylematic bark tissues and seedlings of Pinus sylproteins of the cell wall (Bradley et al., 1992). Its generavestris L. The isozymes were partially purified by tion in...
متن کاملEffects of foliar potassium concentration on morphology, ultrastructure and polyamine concentrations of Scots pine needles.
We examined the effects of three foliar potassium concentrations (high, intermediate and low) on the morphology, ultrastructure and polyamine concentrations of current-year and 1- and 2-year-old needles of 30-year-old Scots pine (Pinus sylvestris L.) trees. Foliar K concentration had only a slight effect on needle morphology. The sclerenchyma cell walls were thinner, the xylem area was larger, ...
متن کاملVOC emissions of Scots pine
Temperature and light dependence of the VOC emissions of Scots pine V. Tarvainen, H. Hakola, H. Hellén, J. Bäck, P. Hari, and M. Kulmala Finnish Meteorological Institute, Sahaajankatu 20 E, FI-00880 Helsinki, Finland Department of Forest Ecology, University of Helsinki, Helsinki, Finland Department of Physical Sciences, University of Helsinki, Helsinki, Finland Received: 10 August 2004 – Accept...
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ژورنال
عنوان ژورنال: Forestry
سال: 2000
ISSN: 0015-752X,1464-3626
DOI: 10.1093/forestry/73.3.239