Index Catalog // ScholarsArchive@OSU

Use of nondestructive spectroscopy to assess chlorophyll and nitrogen in fresh leaves

Creator:: Ding, Pinghai
Abstract:: Four aspects of factors influencing the accuracy of nondestructive chlorophyll (Chl) and nitrogen (N) measurement in fresh leaves were studied: (1) optimum wavelength (OW) identification; (2) indices development and evaluation; (3) influence of leaf properties; and (4) influence of meter parameters and sampling technique. Results were used to develop indices...
Resource Type:: Dissertation
Full Text:: committee, Drs. Carolyn Scagel, Robert Linderman, Carmo M. Vasconcelos, John A. Young, and Thomson K

Factors affecting the incidence and severity of Phytophthora syringae cankers in pear (Pyrus communis) trees

Creator:: Laywisadkul, Srisangwan
Abstract:: Container grown pear trees were used to determine the effects of the following factors on the susceptibility to Phytophthora syringae: 1) tree nitrogen (N) status and foliar sprays of urea and copper-EDTA (CuEDTA); 2) dormancy and environmental conditions; 3) wound and wound age; and 4) chemical and biological control measures....
Resource Type:: Dissertation
Full Text:: . Carolyn F. Scagel for their help, support, and advice. I would also like to thank other members of my

The effects of soaking and low temperatures on germination and seedling vigor of snap beans (Phaseolus vulgaris L. cv. Slenderette)

Creator:: Walls, Timothy W.
Resource Type:: Masters Thesis
Full Text:: to serve on my graduate committee. My appreciation goes to my wife, Carolyn, for her patience and

Cryopreservation of in vitro-grown apical meristems

Creator:: Chang, Yongjian
Abstract:: Alternating temperature (22°C / -1°C) pretreatments were effective for increasing cold hardiness and recovery of cryopreserved meristems. Combining low temperature pretreatment with abscisic acid (ABA) or sucrose treatments reduced the time required for optimal cold hardiness of meristems. Desiccation tolerance was directly correlated with increased cold hardiness and recovery of...
Resource Type:: Dissertation
Full Text:: Vitro-Grown Apical Meristems. Abstract approved^ . . Barbara M. Reed Alternating temperature (220C

Nitrogen, defoliation and new growth in almond (Prunus dulcis (Mill) D.A. Webb) nursery plants

Creator:: Bi, Guihong
Abstract:: The relationships between nitrogen (N), defoliation, and plant growth in nursery plants were studied using almond {Prunus dulcis (Mill) D. A. Webb) trees. In several experiments the effects of N source and availability on tree growth, N uptake, N remobilization, and nonstructural carbohydrates (TNC) were investigated to determine the most...
Resource Type:: Dissertation
Full Text:: Oregon State, and for his patience, support, and encouragement. Likewise, I wish to thank Dr. Carolyn

Overexpression of antioxidant genes in transgenic tomato tolerant against multiple stresses

Creator:: Wang, Yueju
Abstract:: The effect of increased manganese superoxide dismutase (Mn-SOD) and cytosolic ascorbate peroxidase (cAPX) on various abiotic stresses was studied using transgenic tomato (Lycopersicon esculentum) plants. Transformants were selected in vitro based on kanamycin resistance, confirmed by PCR and northern blot analyses. Northern blots showed an enhanced gene expression of Mn-SOD...
Resource Type:: Dissertation
Full Text:: - generating herbicide methyl viologen (MV, 10"4 M). The total SOD activity was 1.5- to 2-fold higher and

Influence of photosynthesis and carbohydrates on adventitious root formation by leafy cuttings

Creator:: Davis, Tim D.
Abstract:: Many investigators have suggested that current photosynthate supply can limit adventitious root formation on leafy cuttings. Accordingly, studies were undertaken to determine the effects of altering photosynthesis and carbohydrate levels on adventitious root formation by leafy cuttings of a number of different species. Pea cuttings rooted at high CO₂ (1800...
Resource Type:: Dissertation
Full Text:: containing both 2.9 x 10~^ M sucrose and 5.6 x 10 M glucose in 10% Hoagland's solution 82 5-1

Nondestructive evaluation of in vitro-stored plants : a comparison of visual and image analysis systems

Creator:: Aynalem, Hailu M.
Abstract:: In-vitro plants in slow-growth storage must be routinely evaluated for repropagation and assessment of viability. It is often difficult to determine plant health by visual assessment due to variation in growth patterns and plant structure among genera. In order to evaluate cold-stored germplasm, laboratories need more effective approaches for viability...
Resource Type:: Masters Thesis
Full Text:: AN ABSTRACT OF THE THESIS OF Hailu M. Aynalem for the degree

Imaging fluorescent determination of energetics of chloroplast division and related matters

Creator:: Zheng, Ping
Abstract:: During exploration of imaging photosynthetic fluorimetry of Arabidopsis thaliana mutants, we discovered a novel phenomenon wherein photosynthetic efficiency (defined in Ning et al., 1995) is shown to plot in discrete groups. This exploration resulted first in the development of a spectrofluorometric method that apparently allows for in vivo observation of...
Resource Type:: Dissertation
Full Text:: different phases are denoted O ID P S M T. The letters correspond to the Origin of curve or initial

Development, detection and elimination of Verticillium dahliae in mint shoot cultures and effects of bacterial cultures and bacterization on the growth and disease development

Creator:: Wang, Nan
Abstract:: Roots of greenhouse-grown peppermint (Mentha piperita L.) and spearmint (Mentha spicata L.) plants and in vitro-grown shoot cultures were inoculated with Verticillium dahliae conidial suspensions to study symptom development, detection, and elimination of the V. dahliae. There were significant differences in the symptom expression of control and infected shoot cultures...
Resource Type:: Masters Thesis
Full Text:: Bacterization on the Growth and Disease Development Abstract approved:' Barbara M. Reed Roots of greenhouse

ScholarsArchive@OSU

Use of nondestructive spectroscopy to assess chlorophyll and nitrogen in fresh leaves

Factors affecting the incidence and severity of Phytophthora syringae cankers in pear (Pyrus communis) trees

The effects of soaking and low temperatures on germination and seedling vigor of snap beans (Phaseolus vulgaris L. cv. Slenderette)

Cryopreservation of in vitro-grown apical meristems

Nitrogen, defoliation and new growth in almond (Prunus dulcis (Mill) D.A. Webb) nursery plants

Overexpression of antioxidant genes in transgenic tomato tolerant against multiple stresses

Influence of photosynthesis and carbohydrates on adventitious root formation by leafy cuttings

Nondestructive evaluation of in vitro-stored plants : a comparison of visual and image analysis systems

Imaging fluorescent determination of energetics of chloroplast division and related matters

Development, detection and elimination of Verticillium dahliae in mint shoot cultures and effects of bacterial cultures and bacterization on the growth and disease development

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