Index Catalog // ScholarsArchive@OSU

The occurrence of abscisic acid in the dormant shoots of Douglas-fir [Pseudotsuga menziesii (Mirb.) Franco]

Creator:: Webber, John Edinburgh
Abstract:: Methanolic extracts of the dormant Douglas-fir shoots (buds, leaves, and stems) were fractionated by solvent partitioning (sodium bicarbonate-diethyl ether). The acidic portion of the extract was subjected to column (Sephadex LH-2O, Silica Gel and Polyvinylpyrrolidone), preparative thick-layer and gas-liquid chromatography. Fractions collected from chromatographic separations were collected and tested for...
Resource Type:: Dissertation

Indole-3-acetic acid in Douglas-fir (Pseudotsuga menziesii (mirb.) Franco) : a definitive analysis of gas-liquid chromatography-mass spectrometry

Creator:: DeYoe, David R.
Abstract:: Definitive evidence for the occurrence and seasonal variation of indole-3 -acetic acid (IAA) in shoots 0 DougLas-fir (Pseudotsuga rrienztesii (Mirb. ) Franco) was sought. Collections obtained in December and June were extracted by solvent using methanol arid diethyl ether arid by certtrtfugatiori. Extraction by ceritrifugation appeared to be twice as...
Resource Type:: Masters Thesis

Effect of auxins, cytokinins and nutrition on adventitious bud formation in tissues of Douglas-fir grown in culture

Creator:: Thompson, David George
Abstract:: Vegetative propagation is most effective when individuals of demonstrated superior characteristic can be propagated. For this reason, a method for the induction of adventitious buds on cultured Douglas-fir shoot tips from 20-25 year old trees was developed. Douglas-fir shoot tips failed to survive and grow on a full strength Murashige...
Resource Type:: Dissertation

Water relations, gas exchange, and growth responses of Douglas-fir seedlings to stresses associated with transplanting

Creator:: Joseph, Gladwin
Abstract:: The goal of this thesis was to determine the physiological mechanisms that link adverse preplanting treatments of Douglas-fir, such as exposure and root pruning, to the phenomenon of transplanting shock. The objective of experiments 1 and 2 was to measure the effect of exposure and pruning on the physiology and...
Resource Type:: Dissertation

The effects of nursery incurred tap-root wounds on growth of Douglas-fir seedlings

Creator:: Whiting, Elizabeth Cameron
Abstract:: Tap-root wounds frequently occur on seedlings during lifting in forest tree nurseries. Data are needed to clarify guidelines for culling wounded seedlings. Two-year-old bareroot Douglas-fir (Pseudotsuga menziesii (Mirb.) Franco) seedlings were wounded by hand on the tap-root to lengths of either 3/8, 1, or 3 inches. Wounded seedlings were used...
Resource Type:: Masters Thesis

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

Evaluating the quality of Douglas-fir (Pseudotsuga menziessii (Mirb.) Franco) seedlings : a comparison of some current and proposed evaluation methods

Creator:: McCreary, Douglas D.
Abstract:: The physiological condition of tree seedlings at the time they are planted can have a profound impact on their subsequent field performance. Damaged or low vigor seedlings have a much greater chance of dying in the field, or at best, of growing slowly during their initial establishment period. Several methods...
Resource Type:: Dissertation

The starch content of roots and the osmotic concentration of expressed xylem sap as predictors of Douglas-fir seedling quality

Creator:: Forry, Keith R.
Abstract:: The goal of this study was to evaluate the ability of two seedling quality evaluation methods to predict the field survival of Douglas-fir (Pseudotsuga menziesii) seedlings. The starch reserves in seedlings have been suggested as a possible predictor of seedling quality. Starch reserves have been shown to decrease during cold...
Resource Type:: Masters Thesis
Full Text:: Roots and the Osmotic Concen- tration of Expressed Xylem Sap as Predictors of Douglas-Fir Seedling

Physiological and morphological responses to water deficit in seedling progeny of four populations of Douglas-fir (Pseudotsuga menziesii [Mirb.] Franco)

Creator:: Joly, Robert J.
Abstract:: The relationships among total water potential (psi), osmotic potential ([pi]), pressure potential (P), and relative water content (R*) were determined during four consecutive soil drying cycles for shoots of Douglas-fir (Pseudotsuga menziesii [Mirb.] Franco) seedlings. In each cycle, seedlings were sampled for pressure-volume determinations as soil water was depleted gradually...
Resource Type:: Dissertation

Biochemical markers of quality in Douglas-fir (Pseudotsuga menziesii (Mirb.) Franco) seedlings : the relationship between survival, root growth potential, freezing and drying damage, and time of lift

Creator:: Hipkins, Valerie D.
Abstract:: The physiological condition of a seedling often determines its ability to survive when planted. However, physiological damage is difficult to determine from external measurement or observation, because a healthy looking seedling can be of poor quality (quality is defined as the ability of a seedling to survive when outplanted). Methods...
Resource Type:: Masters Thesis

Plagiogravitropic growth in rooted stem cuttings of Douglas-fir (Pseudotsuga menziesii (Mirb.) Franco) related to indole-3-acetic acid and cytokinins

Creator:: Chien, Ching-te
Abstract:: Endogenous concentrations of indole-3-acetic acid (IAA) and cytokinins were compared to the tendency for plagiogravitropjc growth in rooted stein cuttings of Douglas-fir. A chromatographic method was developed for the purification and quantitation of trace levels of IAA. Two elutions with reverse-phase high performance liquid chromatography (HPLC) using a fluorescence detector...
Resource Type:: Masters Thesis

Factors affecting adventitious shoot formation and expression of microprojectile-introduced DNA in Douglas-fir cotyledons

Creator:: Goldfarb, Barry
Abstract:: Our goal was to develop knowledge that will enable insertion of foreign genes into Douglas-fir [Pseudotsuga menziesii (Mirb.) Franco] trees. This required improvement of a tissue culture system for producing adventitious shoots from cotyledons, and study of factors affecting gene delivery, expression, and analysis. Administering a short-duration, concentrated liquid pulse...
Resource Type:: Dissertation

Root respiration of Douglas-fir and western hemlock seedlings

Creator:: Lu, Shengjun
Abstract:: Most of the methods currently used to measure root respiration introduce various disturbances which may lead to biased results, and require destruction of roots which does not permit repeated measurements of root growth and respiration. A root box method was developed for measurement of root respiration, as well as root...
Resource Type:: Dissertation

Survival and some physiological aspects of tissue cultured cells from Douglas-fir (Pseudotsuga menziesii Mirb. (Franco)) and a poplar hybrid after freezing to liquid nitrogen temperature

Creator:: Binder, Wolfgang Dieter
Abstract:: Cell aggregate size in both Douglas-fir and poplar suspension cultures was reduced by the addition of the chelator compounds EDTA and CDTA at concentrations under 100 ppm. Reduced cell aggregate size increased growth efficiency of suspension cultures of both species. Cell aggregates 550 j.z. or smaller in size were used...
Resource Type:: Dissertation

Ionic balance and the constituent organic acids of current-year foliage of western redcedar, western hemlock, and Douglas-fir seedlings

Creator:: Graff, Joseph Edward
Abstract:: Western redcedar, western hemlock, and Douglas-fir seedlings were transplanted into pots in one of two soils representative of high and low levels of available NO3 (and total N). The soils were collected from sites at Cascade Head (Oregon Coast) and Wind River (Washington Cascades). Whole plant and component relative dry...
Resource Type:: Dissertation

ScholarsArchive@OSU

The occurrence of abscisic acid in the dormant shoots of Douglas-fir [Pseudotsuga menziesii (Mirb.) Franco]

Indole-3-acetic acid in Douglas-fir (Pseudotsuga menziesii (mirb.) Franco) : a definitive analysis of gas-liquid chromatography-mass spectrometry

Effect of auxins, cytokinins and nutrition on adventitious bud formation in tissues of Douglas-fir grown in culture

Water relations, gas exchange, and growth responses of Douglas-fir seedlings to stresses associated with transplanting

The effects of nursery incurred tap-root wounds on growth of Douglas-fir seedlings

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

Evaluating the quality of Douglas-fir (Pseudotsuga menziessii (Mirb.) Franco) seedlings : a comparison of some current and proposed evaluation methods

The starch content of roots and the osmotic concentration of expressed xylem sap as predictors of Douglas-fir seedling quality

Physiological and morphological responses to water deficit in seedling progeny of four populations of Douglas-fir (Pseudotsuga menziesii [Mirb.] Franco)

Biochemical markers of quality in Douglas-fir (Pseudotsuga menziesii (Mirb.) Franco) seedlings : the relationship between survival, root growth potential, freezing and drying damage, and time of lift

Plagiogravitropic growth in rooted stem cuttings of Douglas-fir (Pseudotsuga menziesii (Mirb.) Franco) related to indole-3-acetic acid and cytokinins

Factors affecting adventitious shoot formation and expression of microprojectile-introduced DNA in Douglas-fir cotyledons

Root respiration of Douglas-fir and western hemlock seedlings

Survival and some physiological aspects of tissue cultured cells from Douglas-fir (Pseudotsuga menziesii Mirb. (Franco)) and a poplar hybrid after freezing to liquid nitrogen temperature

Ionic balance and the constituent organic acids of current-year foliage of western redcedar, western hemlock, and Douglas-fir seedlings

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