Explanipedia

Abscisic Acid Increases Terrestrial Plant Cell Resistance to Hydrostatic Pressure Open

Karen Tanino, Chien‐Jen Chen, Leslie H. Fuchigami, C. J. Weiser · 1992

Cells of the terrestrial plant species bromegrass (Bromus inermis L.) are not naturally adapted to withstand the hydrostatic pressures encountered in aquatic environments. However, after treatment with the natural plant growth hormone absc…

Water Content during Abscisic Acid Induced Freezing Tolerance in Bromegrass Cells Open

Karen Tanino, C. J. Weiser, Leslie H. Fuchigami, Chien‐Jen Chen · 1990

Changes in water content and dry weight were determined in control cells and those induced to cold harden in response to abscisic acid (ABA) treatment (7.5 x 10(-5) molar). Bromegrass (Bromus inermis Leyss cv Manchar) cells grown in suspen…

Dormancy-breaking Agents on Acclimation and Deacclimation of Dogwood Open

Karen Tanino, Leslie H. Fuchigami, Tony Chen, Lawrence V. Gusta, C. J. Weiser · 1989

Hydrogen cyanamide or hot-water treatment (47C) for 1 hr at the 250°GS (Growth Stage) effectively broke rest in dogwood buds within 10 to 12 days. At this growth stage, control plants grown at 25/18C (day/night) maintained an LT 50 of –25C…

Cold Hardiness in the Genus Rhododendron Open

A. Sakai, Leslie H. Fuchigami, C. J. Weiser · 1986

Cold hardiness of 101 Rhododendron genotypes was assessed. In hardy rhododendrons, the difference in hardiness between floral primordia and other tissues or organs was greater than in the less hardy species. All rhododendrons tested were d…

News and Events Open

C. J. Weiser · 1984

Modeling Cold Hardiness of Red-osier Dogwood Open

Kent D. Kobayashi, Leslie H. Fuchigami, C. J. Weiser · 1983

Effects of temperature on cold acclimation and deacclimation of red-osier dogwood ( Cornus sericea L. syn. Cornus stolonifera Michx.) plants were determined at different stages of plant development. Results were used to develop models for …

Relationship of Vegetative Maturity in Salix purpurea as Influenced by Mineral Fertilization1 Open

Leslie H. Fuchigami, C. J. Weiser · 1981

Rooted cuttings of a clonal selection of Salix purpurea L. were grown in perlite, in a warm greenhouse at natural daylengths and irrigated daily with one of 10 different mineral nutrient solutions. Plants from each of the nutrient treatmen…

Environmental and Seasonal Factors Affecting the Frost-induced Stage of Cold Acclimation in Cornus stolonifera Michx Open

L. Christen Harrison, C. J. Weiser, Michael J. Burke · 1978

Stem tissues of red-osier dogwood (Cornus stolonifera Michx.) acclimated from -3 C to -40 or -50 C in 8 to 10 weeks under a short photoperiod (9 hours) and controlled temperature conditions. During the summer months plants did not acclimat…

Freezing of Water in Red-Osier Dogwood Stems in Relation to Cold Hardiness Open

L. Christen Harrison, C. J. Weiser, Michael J. Burke · 1978

Studies of stem water in red-osier dogwood (Cornus stolonifera Michx.) using nuclear magnetic resonance spectroscopy indicated that most freezing occurs at temperatures above -30 C in cold-hardy and tender stems. Hardy and tender stems had…

ASHS Working Groups — The Brave Experiment Open

C. J. Weiser · 1978

No one knows for sure just how Working Groups will function, what activities they may engage in, or whether they will change our Society for good or ill. Exciting isn’t it!

The Relationship of Vegetative Maturity to Rest Development and Spring Bud-break1 Open

Leslie H. Fuchigami, M. Hotze, C. J. Weiser · 1977

Rest period, the transition between summer and winter dormancy, and vegetative maturity were studied in red-osier dogwood ( Cornus stolonifera Michx.) in Oregon. Maximum rest occurred in late October and early November when 180 days were r…

Nuclear Magnetic Resonance of Water in Cold Acclimating Red Osier Dogwood Stem Open

Michael J. Burke, Robert G. Bryant, C. J. Weiser · 1974

The pulsed and continuous-wave nuclear magnetic resonance of water in cold-acclimating red osier dogwood (Cornus stolonifera Michx) stem showed reduced relaxation times and increased line width. The reduction of relaxation times suggests a…

Supercooling in Overwintering Azalea Flower Buds Open

Milon F. George, Michael J. Burke, C. J. Weiser · 1974

Differential thermal analysis and nuclear magnetic resonance spectroscopy experiments on whole flower buds and excised floral primordia of azalea (Rhododendron kosterianum, Schneid.) proved that supercooling is the mode of freezing resista…

Effects of Red and Far Red Light on the Initiation of Cold Acclimation in Cornus stolonifera Michx. Open

James McKenzie, C. J. Weiser, Michael J. Burke · 1974

Red and far red light distinctly influence the initial phytochrome-mediated phase of cold acclimation in red-osier dogwood (Cornus stolonifera). Under controlled conditions, short days and end-of-day far red light exposure after long days …

Changes in Water Relations of Cornus stolonifera During Cold Acclimation1 Open

James McKenzie, C. J. Weiser, P. H. Li · 1974

Stomatal resistance of leaves, water absorption through roots, and water content of stem internodes was evaluated during cold acclimation of red-osier dogwood ( Cornus stolonifera Michx.). Four weeks of short-days at 20/15°C resulted in a …

Short Term Increases in the Cold Tolerance of Red Osier Dogwood Stems Induced by Application of Cysteine Open

P. H. Li, C. J. Weiser · 1973

Bark tissues of Cornus stolonifera stems, treated with cysteine at 24 hours after treatment, survived exposure to -11 C (the tissue temperature) with little or no injury. An initiation of increase in the cold tolerance was usually observed…

The Influence of Sugars on Growth and Cold Acclimation of Excised Stems of Red-osier Dogwood1,2 Open

Leslie H. Fuchigami, C. J. Weiser, Daryl G. Richardson · 1973

Excised Cornus stolonifera Michx. stems cultured axenically in a liquid medium were acclimated to cold when subjected to short photoperiods and low temperatures. Foliate explants acclimated effectively and defoliated ones did not when they…

Temperature and Moisture Effects on Hardening of Apple Roots1 Open

David K. Wildung, C. J. Weiser, Harold Pellett · 1973

Roots of ‘Mailing (M) 26’ and ‘ Malus robusta (MR) 5’ were less hardy than stems in winter; hardened more slowly in fall; and dehardened later in spring. In 1967 roots were hardier than in 1968, despite slightly higher soil temperatures. T…

Use of Fluid Fluorocarbons to Study Freezing in Plant Tissues Open

N. P. Sukumaran, H. A. Quamme, C. J. Weiser · 1972

Perfluorinated organic liquids and mixtures of their isomers have many unique properties that can be useful in physiological studies.2 Animal researchers have investigated their possible applications but plant physiologists have not. We ha…

Freezing Injury in Potato Leaves Open

N. P. Sukumaran, C. J. Weiser · 1972

Time-temperature profiles of freezing leaves from frost-resistant (Solanum acaule Bitt.) and frost-susceptible (Solanum tuberosum L. subsp. tuberosum Hawkes) types of potatoes did not reveal any major differences. The pattern of change in …

An Excised Leaflet Test for Evaluating Potato Frost Tolerance1 Open

N. P. Sukumaran, C. J. Weiser · 1972

A simple reproducible procedure is described for assessing frost injury of potato foliage, involving controlled freezing of excised leaflets and measurement of leached electrolytes. Test results are shown for 5 tuber-bearing Solarium speci…

The Relationship of Exotherms to Cold Injury in Apple Stem Tissues1,2 Open

H. A. Quamme, Cecil Stushnoff, C. J. Weiser · 1972

During controlled freezing as many as 4 exotherms were detected in apple twigs by differential thermal analysis (DTA). Three of the exotherms usually occurred at relatively high temperatures above the killing point of stem tissues. There w…

Foliage Frost Resistance in Tuber-Bearing Solanums1 Open

Daryl G. Richardson, C. J. Weiser · 1972

The threat of economic losses due to frost injury is present in almost every region of the world where potatoes are cultivated. Frost damage to foliage is particularly important in parts of South America where potatoes are a primary dietar…

A Versatile Temperature Control System for Cooling and Freezing Biological Materials1 Open

H. A. Quamme, Dean R. Evert, Cecil Stushnoff, C. J. Weiser · 1972

A precise temp control apparatus is described which is useful for studying plant responses between +50° and -100°C.

Nucleic Acid and Protein Changes in Relation to Cold Acclimation and Freezing Injury of Korean Boxwood Leaves Open

Lawrence V. Gusta, C. J. Weiser · 1972

Quantitative and qualitative differences in nucleic acids of Korean boxwood (Buxus microphylla var. Koreana) leaves were determined by methylated albumin kieselguhr chromatography at different levels of cold hardiness. During cold acclimat…

Quantitative Changes in Ribonucleic Acids of Potato Plants in Response to Photoperiod and Temperature1,2 Open

Clayton R. Oslund, P. H. Li, C. J. Weiser · 1972

Quantitative changes in 4S, ribosomal and tenaciously bound RNA occurred in response to various combinations of temp and photoperiod. Short days accompanied by low temp (SD/LT) elicited an increase in ribosomal RNA, whereas RNA decreased w…

Relationship of Electrical Conductance at Two Frequencies to Cold Injury and Acclimation in Cornus stolonifera Michx. Open

Dean R. Evert, C. J. Weiser · 1971

The ratio of electrical conductance measured at two frequencies can be used to predict the cold hardiness of stem sections of Cornus stolonifera Michx. during the first stage of cold acclimation. Electrical conductance at 50 hertz divided …

Induction of Cold Acclimation in Cornus stolonifera Michx. Open

Leslie H. Fuchigami, C. J. Weiser, Dean R. Evert · 1971

A warm (20 to 15 Celsius day or night) preconditioning treatment enhanced cold acclimation of Cornus stolonifera bark under short-day conditions when plants were preconditioned for at least 4 weeks. Warm preconditioning inhibited the accli…

A Technique for the Axenic Culture and Feeding of Excised Woody Stems Open

Leslie H. Fuchigami, C. J. Weiser · 1970

Cold Resistance and Acclimation in Woody Plants12 Open

C. J. Weiser · 1970

Low temperature is acknowledged to be the single most important factor limiting the distribution of plants (70). Freezing damage to horticultural crops is a ubiquitous problem of major economic significance even in sub-tropical regions. Am…

C. J. Weiser YOU? Author Swipe