Index Catalog // ScholarsArchive@OSU

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

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

ScholarsArchive@OSU

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

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

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