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Patterns of growth and seasonal changes in the concentrations of abscisic acid and indoleacetic acid in roots of western hemlock

Creator:: Brown, Charles Joseph
Abstract:: The capacity for root growth and concentration of indole-3-acetic acid and abscisic acid in the roots of western hemlock seedlings was investigated. The root regenerating capacity (RRC) was defined as the increase in root length, greater than 5 mm, following a 28-day test period. RRC measurements over a two-year period...
Resource Type:: Masters Thesis
Full Text:: appears to be optimum at a soil temperature of 20°C. Root growth seems to decrease with increasing light

Incorporation of ¹⁵NO₃ into amino acids of Douglas-fir xylem sap

Creator:: Sandstrom, Richard P.
Abstract:: Roots are considered to be the major production site of amino acids that appear in the xylem sap of conifers. The carbon skeleton of amino acids is derived from photosynthetically reduced carbon dioxide while the nitrogen is derived from the inorganic forms taken up by the roots. An experiment was...
Resource Type:: Masters Thesis

The physiology of dormancy of western hemlock (Tsuga heterophylla (Raf.) Sarg.) seedlings

Creator:: Nelson, Eric Alan
Abstract:: The physiology of dormancy of western hemlock (Tsuga heterophylla (Raf.) Sarg.) seedlings was examined. Many areas proved to exhibit similarities to those elucidated for Douglas-fir, although significant differences were also found and necessitate the use of caution in extrapolating data from one species to the other.. Dormancy of western hemlock...
Resource Type:: Dissertation

Silviculture-ecology of three native California hardwoods on high sites in north central California

Creator:: McDonald, Philip M.
Abstract:: Pacific madrone, tanoak, and California black oak are the most economically promising native California hardwoods. Volume and value data indicate upward trends in growing stock levels and prices received for their products. These trends are likely to continue. They suggest research is particularly needed for: (1) seed fall and regeneration,...
Resource Type:: Dissertation
Full Text:: and control 17 Comparative 6-year d.b.h. growth rates in thinned 236 plots (P) and control (c) by

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

Root regeneration potential in Douglas fir and Western hemlock seedlings : the role of environmental factors and current photosynthesis

Creator:: Thompson, Barbara Ellen
Abstract:: Three experiments were conducted on containerized seedlings to examine the short-term and long-term effects of environment on the root regeneration potential, and to examine the fate of the current photosynthate and its relationship to the root regeneration potential. The short-term effects were studied first in a 3x3x2 factorial experiment comprising...
Resource Type:: Masters Thesis

Stress response as a basis for disease susceptibility in Ponderosa Pine

Creator:: Koonce, Andrea
Abstract:: Trees stressed by artificial and natural means were sampled for response in growth and vigor, carbohydrate content, resin pressure characteristics, and water relations. Tree response was found to reflect both the severity and type of stress imposed. Crown color and appearance were reliable indicators of prolonged stress and advanced decline...
Resource Type:: Masters Thesis
Full Text:: Areas I, II, and III 76-77 C Starch analysis procedure 78-80. Page F Leader growth data 87 C

Distribution of light within the crown of an open-grown Douglas-fir

Creator:: Ungs, M. J. (Michael J.)
Abstract:: A systematic investigation was made of the distribution of short wave radiation within the crown of an open-grown Douglas-fir tree. The study tree was 23 years old, 14 meters tall and had a maximum crown diameter of about ten meters. Global radiation was measured every 15 cm along eight different...
Resource Type:: Dissertation

Ectomycorrhizal populations on a chronosequence of disturbed areas in the central Cascades

Creator:: Meyer, Michele Marie
Abstract:: A greenhouse bioassay was used to investigate effects of natural and manmade disturbances on native ectomycorrhizal populations of Douglas-fir and western hemlock on a steep southeast slope in the west central Cascade Mountains. Total and mycorrhizal root tips were counted on seedlings grown in soils collected from (a) two 100+...
Resource Type:: Masters Thesis

ScholarsArchive@OSU

Patterns of growth and seasonal changes in the concentrations of abscisic acid and indoleacetic acid in roots of western hemlock

Incorporation of ¹⁵NO₃ into amino acids of Douglas-fir xylem sap

The physiology of dormancy of western hemlock (Tsuga heterophylla (Raf.) Sarg.) seedlings

Silviculture-ecology of three native California hardwoods on high sites in north central California

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

Root regeneration potential in Douglas fir and Western hemlock seedlings : the role of environmental factors and current photosynthesis

Stress response as a basis for disease susceptibility in Ponderosa Pine

Distribution of light within the crown of an open-grown Douglas-fir

Ectomycorrhizal populations on a chronosequence of disturbed areas in the central Cascades

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