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Diurnal and seasonal changes in xylem water potential, stomatal conductance and abscisic acid in five different habitat types of Douglas-fir (Pseudotsuga menziesii (Mirb.) Franco)

Creator:: Murphy, Ellyn Margaret
Abstract:: Sapling Douglas-fir trees on five sites in the Coastal and Cascade Mountain ranges of Oregon were measured five times during the year from the summer of 1977 through the spring of 1978 for diurnal patterns of xylem water potential, stomatal conductance and abscisic acid. Vapor pressure deficit and solar radiation...
Resource Type:: Masters Thesis

Abscisic acid levels in relation to stomatal behavior during drought and recovery in contrasting ecotypes of Douglas-fir (Pseudotsuga menziesii (Mirb.) Franco)

Creator:: Newville, Edward G.
Abstract:: Foliage of Douglas-fir seedlings [Pseudotsuga menziesii (Mirb.) Franco] from two contrasting environments was sampled during progressive stages of two consecutive cycles of induced drought for leaf resistance, plant water potential , and abscisic acid content (ABA). One group of seedlings was placed in a controlled environment room while another group...
Resource Type:: Masters Thesis

Variation in the foliar nutrient status of several Douglas-fir provenances

Creator:: Stevens, Roderick D.
Abstract:: From a preliminary 1969 foliar analysis, eight provenances were chosen from the sixteen included in a region-wide, reciprocal Doulgas-fir provenance study for further study of variation in foliar nutrition. In the fall of 1969 separate foliar samples were collected from ten trees per provenance at each of ten plantations ranging...
Resource Type:: Dissertation

Growth behavior of Douglas-fir reproduction in the shade of managed forest in the interior Coast Range of Oregon

Creator:: Del Rio, Ernest
Abstract:: During the past 20 years, repeated thinning of a Douglas-fir forest, now 65 years old, has allowed desired limits of basal area to be maintained. In the process, the understory environment has altered sufficiently to allow Douglas-fir reproduction to establish in abundance. The forest is located on the east side...
Resource Type:: Masters Thesis

Geographic and seasonal variation in photosynthetic efficiency and capacity of Rocky Mountain Douglas-fir, Pseudotsuga menziesii var. glauca

Creator:: Pope, Walter William
Abstract:: Net photosynthesis was measured for photosynthetic light efficiency and capacity on two-year-old plants from eight different seed sources in three measurement periods. The measurement periods corresponded to the physiological periods 1) prior to bud swelling, 2) after needle elongation, and 3) predormancy. Measurement period differences in both photosynthetic efficiency and...
Resource Type:: Dissertation
Full Text:: ROCKY MOUNTAIN DOUGLAS-FIR, PSEUDOTSUGA MENZIESII VAR .. GLAUCA Abstract approved: Signature

Starch content and crown growth in two Douglas-fir stands

Creator:: Kilpatrick, Kran James
Abstract:: The objectives of this investigation were to measure the seasonal and diurnal variations of starch as well as to relate these variations to growth of the trees. This study also microscopically examined the needles to determine if starch exists in granular form in Douglas-fir. The objectives were designed to gain...
Resource Type:: Masters Thesis
Full Text:: Douglas-fir at bud burst. A three piece overlay. 15,16,17 2 Seasonal starch variation with means

The influence of seral Coast Range vegetation on the growth habit of juvenile Douglas-fir

Creator:: Howard, Kerry Megan
Abstract:: A detailed analysis was performed on the juvenile growth of six types of Douglas-fir stock under the influence of typical seral Coast Range vegetation. Objectives were to analyze competitive influences important to the growth of tree seedlings and evaluate differences between stock type characteristics and growth patterns in response to...
Resource Type:: Masters Thesis

The effects of winter plant moisture stress on survival and growth of 2+0 Douglas-fir seedlings

Creator:: Daniels, Thomas Gary
Abstract:: The effects of winter plant moisture stress (P145) on bare-root 2+0 Douglas-fir (Pseudotsuga menziesii (Mirb.) Frañco) seedlings during nursery lifting and processing were studied. Seedlings were undercut at Ca. 4, 12, and 20 atm PMS during mid-February. Half of the seedlings undercut at 12 and 20 atm were not moistened...
Resource Type:: Masters Thesis

Plant-water relations in Douglas-fir seedlings and screening selected families for drought resistance

Creator:: Hallgren, Stephen William
Abstract:: This study was divided into two parts. Part I was a quantitative description of some aspects of plant-water relations in Douglas-fir seedlings, and part II was tests of several techniques of screening selected families of Douglas-fir seedlings for drought resistance. Part I. During 20 mild summer days in 1976 at...
Resource Type:: Masters Thesis

Some strategies for controlling the Douglas-fir tussock moth by regulation of budbreak

Creator:: Cobb, Jimmie Osborn
Abstract:: The young larvae of the Douglas-fir tussock moth (Orgyia pseudotsugata (McDunnough) (DFTM) are dependent on the new foliage of its ho'sts (Doug1as-fir, grand fir, white fir) for their food supply. The phenology of the DFTM and its hosts are synchronized, with egg hatch and dispersal occurring one to three weeks...
Resource Type:: Masters Thesis

ScholarsArchive@OSU

Diurnal and seasonal changes in xylem water potential, stomatal conductance and abscisic acid in five different habitat types of Douglas-fir (Pseudotsuga menziesii (Mirb.) Franco)

Abscisic acid levels in relation to stomatal behavior during drought and recovery in contrasting ecotypes of Douglas-fir (Pseudotsuga menziesii (Mirb.) Franco)

Variation in the foliar nutrient status of several Douglas-fir provenances

Growth behavior of Douglas-fir reproduction in the shade of managed forest in the interior Coast Range of Oregon

Geographic and seasonal variation in photosynthetic efficiency and capacity of Rocky Mountain Douglas-fir, Pseudotsuga menziesii var. glauca

Starch content and crown growth in two Douglas-fir stands

The influence of seral Coast Range vegetation on the growth habit of juvenile Douglas-fir

The effects of winter plant moisture stress on survival and growth of 2+0 Douglas-fir seedlings

Plant-water relations in Douglas-fir seedlings and screening selected families for drought resistance

Some strategies for controlling the Douglas-fir tussock moth by regulation of budbreak

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