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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:: concentration, slightly increased tree susceptibility to the pathogen in experiment 1, but had no influence on

Physiology of flowering in Coffea arabica L. : role of growth regulators and water relations

Creator:: Schuch, Ursula K.
Abstract:: Coffee trees growing in the Kona district of Hawaii were treated with different concentrations of either BA, GA3, or Promalin, and pruned at the time of flowering. No significant differences in the flowering and fruit ripening pattern were found. High concentrations (100 mg/1) of growth regulators decreased fruit fresh weight....
Resource Type:: Dissertation
Full Text:: with different concentrations of either BA, GA3, or Promalin, and pruned at the time of flowering. No

Relationship of "near-lethal" stress on dormancy, cold hardiness and recovery of Red-Osier dogwood

Creator:: Shirazi, Abbas M.
Abstract:: The effects of overcoming rest by application of "near-lethal" (NL) stress treatments on the subsequent development of cold hardiness of stem tissues of red-osier dogwood, Comus sericea L., at different rest stages under three post-environments (0°, 23°, and natural condition) were studied. NL-heat stress (47°C for one hour) treatment during...
Resource Type:: Dissertation
Full Text:: Organization of the United Nations. 1990. Production Yearbook Vol 43. F. A. O. statistics series. No. 94

Strategies for machine harvesting of mature coffee (Coffea arabica L.) fruits

Creator:: Tongumpai, Peeradet
Abstract:: Greenhouse and field grown coffee plants were used to study the synchronization of flowering and fruiting. The purpose of these studies was to develop methods of improving the selective harvesting of mature coffee fruits by machine. The studies were divided into 4 parts: 1) Synchronization of flowering, 2) Synchronization of...
Resource Type:: Dissertation
Full Text:: harvesting of mature coffee fruits by machine. The studies were divided into 4 parts: 1) Synchronization

Water relations, stomatal conductance, and abscisic acid content of container-grown apple (Malus domestica Borkh.) plants in response to sorbitol-induced osmotic stress

Creator:: Guak, Sunghee
Abstract:: Sorbitol-induced osmotic stress (SIOS) to the root was found to be effective in reducing transpirational water loss in plants during water stress. Mechanisms of SIOS in stomatal control were investigated in containerized apples (Malus domestica Borkh. 'Gala'/M26) when leaf water potential (Ψw), osmotic potential (Ψs), turgor potential (Ψp), stomatal conductance...
Resource Type:: Dissertation
Full Text:: increase significantly two hrs after treatment, but had no effect in outdoor-adapted plants. However, gs

Modeling of dormancy and cold hardiness in red-osier dogwood (Cornus sericea L.)

Creator:: Kobayashi, Kent
Abstract:: Effects of temperature and growth stage on vegetative bud development and stem hardiness of red-osier dogwood during winter dormancy were investigated. Results were related to a degree growth stage model and were used to develop models to predict growth stages, to quantify development, and to predict hardiness. Maximum rest development...
Resource Type:: Dissertation
Full Text:: o o promoted by 5 -15 C with increasing rate with decreasing temperature. No development

The free radical scavenging system in overcoming phytotoxicity and breaking dormancy

Creator:: Zhen, Liping
Abstract:: Hydrogen cyanamide (CY) induced earlier budbreak, more uniform and a higher percentage of budbreak in resting poplar (Populus alba x P. gradidentata, NC 5339) plants. However, it was phytotoxic to poplar when applied at 0.5 M or higher concentrations. Percent budbreak increased and percent dieback decreased when poplar plants were...
Resource Type:: Dissertation
Full Text:: superoxide dismutase (SOD) increased slightly in 1 mM CY treatment for 24 hour incubation. These enzyme

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:: Page Chapter 1. Introduction and Literature Review 1 1.1 Oxidative Stress as Related to Plant

Relationships between endogenous phenolic compounds of rhododendron tissues and organs and cold hardiness development

Creator:: Chalker-Scott, Linda
Abstract:: The leaching of water soluble phenolic compounds from cold stressed Rhododendron leaves was found to be a reliable indicator of tissue damage. In sublethally stressed leaf tissues, more and novel phenolic compounds appeared and were hypothesized to be precursors of cell wall components such as lignin and suberin. Subsequent radiolabeling...
Resource Type:: Dissertation
Full Text:: . TABLE OF CONTENTS I. INTRODUCTION 1 II. LITERATURE REVIEW 4 I. Roles of Phenolic Compounds

Overcoming bud dormancy with hydrogen cyanamide : timing and mechanism

Creator:: Nee, Cheng-chu
Resource Type:: Dissertation
Full Text:: Doctor of Philosophy in Horticulture presented on August 1, 1986. Title: Overcoming Bud Dormancy with

ScholarsArchive@OSU

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

Physiology of flowering in Coffea arabica L. : role of growth regulators and water relations

Relationship of "near-lethal" stress on dormancy, cold hardiness and recovery of Red-Osier dogwood

Strategies for machine harvesting of mature coffee (Coffea arabica L.) fruits

Water relations, stomatal conductance, and abscisic acid content of container-grown apple (Malus domestica Borkh.) plants in response to sorbitol-induced osmotic stress

Modeling of dormancy and cold hardiness in red-osier dogwood (Cornus sericea L.)

The free radical scavenging system in overcoming phytotoxicity and breaking dormancy

Overexpression of antioxidant genes in transgenic tomato tolerant against multiple stresses

Relationships between endogenous phenolic compounds of rhododendron tissues and organs and cold hardiness development

Overcoming bud dormancy with hydrogen cyanamide : timing and mechanism

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