2 edition of Freezing resistance of tissues in the twig of Douglas-fir Pseudotsuga menziesii (Mirb.)Franco) found in the catalog.
Freezing resistance of tissues in the twig of Douglas-fir Pseudotsuga menziesii (Mirb.)Franco)
John Norman Alden
Written in English
|Statement||by John Norman Alden.|
|The Physical Object|
|Pagination||, 149 leaves, bound :|
|Number of Pages||149|
Douglas-fir (Pseudotsuga menziesii (Mirb.) Franco var. menziesii) stands to assess short-term effects on tree N acquisition, soil N supply, and total soil N. Vegetation control treatments began in the first year after harvest, and logging-debris ma-nipulations were installed 2 years after harvest. Douglas-fir trees following western spruce budworm defolia-tion are influenced by tree genotype and that high growth rate and late bud burst phenology promote tree resistance to bud-worm defoliation. Keywords: Choristoneura occidentalis, genetic variation, in-sect herbivory, photosynthesis, Pseudotsuga menziesii. Introduction.
Particularly conifers, including Douglas-fir, possess large pools of volatile isoprenoids in nearly all tissues required for biotic stress defense (Giunta et al. ). Interior and coastal Douglas-fir provenances have been shown to vary in pool sizes and composition of stored monoterpenes (Junker et al. , Kleiber et al. ). You are here >1Up Info > Wildlife, Animals, and Plants > Plant Species > Tree > SPECIES: Pseudotsuga menziesii var. glauca | Rocky Mountain Douglas-Fir .
Biomass and nutrient content of Douglas-fir logs and other detrital pools in an old-growth forest, Oregon, U.S.A. Can. J. For. Res. Les biIles, la litiere et Ie sol mineral furent echantillonnees et mesures, de meme que les chicots furent mesures, dans un peuplement de Douglas taxifolie (Pseudotsuga menziesii (Mirb.). We compared growth rates among mature interior Douglas-fir (Pseudotsuga menziesii var. glauca (Beissn.) Franco) trees showing resistance or susceptibility to defoliation caused by western spruce budworm (Choristoneura occidentalis Freeman), and among clones and half-sib seedling progeny of these trees in a greenhouse. We also investigated bud burst phenology and photosynthetic responses .
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The relative freezing resistance of tissues in the stem, foliage and buds of terminal twigs from Douglas-fir (Pseudotsuga menziesii (Mirb.) Franco) was investigated at about ten-day intervals from summer until the following by: 2.
Title: FREEZING RESISTANCE OF TISSUES IN THE TWIG OF DOUGLAS-FIR (PSEUDOTSUGA MPNZIESI (MIRB.) FRANCO) Abstract approved: Dr. Richard K. Hermann The relative freezing resistance of tissues in the stem, foliage and buds of terminal twiSs from Douglas-fir (Pseudotsuga menziesii (Mirb.) Franco) was investigated at about ten-day intervals from.
Freezing resistance of tissues in the twig of Douglas-fir (Pseudotsuga menziesii (Mirb.) Franco) By. Abstract. Graduation date: The relative freezing resistance of tissues in the stem, foliage and buds of terminal twigs from Douglas-fir (Pseudotsuga menziesii (Mirb.) Franco) was investigated at about ten-day intervals from summer until the.
Two-year-old coastal Douglas-fir (Pseudotsuga menziesii (Mirb.) Freezing Resistance of Tissues in the Twig of Douglas-Fir Pseudotsuga menziesii Book. Full-text available. stages of Douglas-fir (Pseudotsuga menziesii (Mirb.) Franco), western hemlock (Tsuga heterophylla Raf.) Sarg.), subalpine fir (Abies lasiocarpa (Hook.) Nutt.), and white birch (Betula papyrifera Marsh) in western Montana.
Similar results were found by Roskowski27 using woody residue from New England hardwood stands. Morphogenesis of stems of Douglas fir (Pseudotsuga menziesii (mirb.) franco) Creator: Heger, Ladislav: Publisher: University of British Columbia: Date Issued: Description: Widths of 22, bands of earlywood and latewood were measured systematically along the average radii at the centers of the annual height increments of 18 Douglas fir.
TAXONOMY: The currently accepted scientific name of Douglas-fir is Pseudotsuga menziesii (Mirbel) Franco (Pinaceae) [90,]. This FEIS summary focuses Rocky Mountain Douglas-fir (Pseudotsuga menziesii var.
glauca (Beissn.) Mayr) [,]. Coast Douglas-fir (Pseudotsuga menziesii var. menziesii) is the other recognized variety [,]. Most old growth Douglas-fir (Pseudotsuga menziesii) range in height from to feet, and have a diameter of 5 to 8 feet.
The oldest known Douglas-fir (Pseudotsuga menziesii) can be found on Vancouver Island in British Columbia, and is estimated to be between to years old (Earle ). Second-Growth Douglas-fir.
Photo by author. Simultaneous detection of ultrasonic emissions and differential thermal analysis exotherms provides a method to determine the lethal freezing temperature in lateral buds of Douglas-fir (Pseudotsugamenziesii (Mirb.) Franco) seedlings in the nonhardy and in the hardy condition.
Carr.) and 1 + 1 Douglas fir (Pseudotsuga menziesii (Mirb.) Franco) were grown in a nursery at the Bush Estate, Scotland. Batches were lifted and cold stored at °C in November, December and. dothidea was confirmed by wound and nonwound inoculation of 7-yr-old seedlings, as the cause of a twig blight of Pseudotsuga menziesii.
The most conspicuous symptoms were yellowing, wilting and browning of the needles on individual branches. This was followed by progressive dieback of branches from tip to the central leader and complete defoliation of some branches.
Two-year-old coastal Douglas-fir (Pseudotsuga menziesii (Mirb.) Franco) seedlings from two seed lots were exposed to controlled freezing temperatures every 4 weeks from October through April Freezing effects were assessed by measuring chlorophyll fluorescence emissions 1 day after freezing and by evaluating damage to the bud, cambium, and needle tissues 7 days after freezing.
Douglas Fir (Pseudotsuga menziesii) Nebraska Forest Service Douglas fir (Pseudotsuga menziesii) is one of the most important timber trees in the United States. It is harvested for a wide variety of uses and is the backbone of the western timber industry. The.
Pseudotsuga menziesii (Mirb.) Franco Show All Show Tabs Douglas-fir General Information; Symbol: PSME Group: Gymnosperm Family: Pinaceae Duration: Perennial: Growth Habit: Tree: Native Status: CAN N L48 N: Characteristics: Fact Sheet.
We assessed the capacity of coastal Douglas‐fir (Pseudotsuga menziesii var. menziesii), an ecologically and economically important species in the northwestern USA, to tolerate both drought and cold stress on 35 populations grown in common gardens.
We used principal components analysis to combine drought and cold hardiness trait data into. Electrical conductivities of diffusate from stem segments of Douglas fir (Pseudotsugamenziesii (Mirb.) Franco) were measured after exposing segments to various freezing temperatures and after heat. Extensive regions of interior Douglas-fir (Pseudotsuga menziesii var.
glauca, IDF) forests in North America are being damaged by drought. Drought and freeze events are two of the most common forms of climate extremes which result in tree damage or death, and the frequency and intensity of both stressors may increase with climate change.
Douglas-fir is a remarkably productive species with a high economic potential and it is assumed to display a comparably high resistance against drought and heat. Within an extended natural range, Douglas-fir populations grow under various climatic conditions and these different environmental drivers may act as selective force on the genetic.
Douglas-Fir (Pseudotsuga menziesii) Allergens and Plants Search Enter a full or partial species name to find more information on one of over potentially allergenic plants.
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global carbon cycle. However, few data on root tissues are available to test this feedback to the atmosphere. In this study, we used ﬁ ne (diameter ≤ 2 mm) and small (2–10 mm) roots of Douglas-ﬁ r (Pseudotsuga menziesii (Mirb.) Franco) seedlings that were grown for 4 yr in a 2 × 2 factorial experiment: ambient or elevated (+ early growth of coast Douglas-fir (Pseudotsuga menziesii (Mirb.) Franco var.
menziesii). Average height and diameter at breast height were progressively larger as planting density increased; at the widest spacing (lowest stand density), average height was 75% and average diameter at breast height was 67% of that at the closest spacing.Genetic control of cold hardiness in two-year-old seedlings in a nursery in Oregon, USA, was compared with that in 7-year-old field saplings, for 40 open-pollinated families in each of two low-altitude breeding populations (Coast and Cascade) of coastal Douglas fir (Pseudotsuga menziesii var.
menziesii) from western Oregon. The field trials were also in the Coast and Cascade breeding zones of.