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The effects of DMSO on wound periderm formation in potato tuber tissue

Creator:: Davidson, Roy M., 1939-
Abstract:: A study was conducted to determine the influence of DMSO (dimethyl sulfoxide) on suberization and wound periderm formation in cut potato tuber tissue, and to determine the effectiveness of DMSO as a potato seedpiece treatment for prevention of seedpiece decay in the field. The influences of tuber storage conditions, varieties,...
Resource Type:: Masters Thesis
Full Text:: PERIDERM FORMATION IN POTATO TUBER TISSUE Abstract approved: Redacted for Privacy D. Robert L

Verticillium wilt of hops : pathogenicity, host range, and temperature relations of the causal agents

Creator:: Zehsazian, Hassan
Abstract:: Verticillium wilt of hops in Oregon, caused by Verticillium dahliae Kleb., was first reported in 1956. Later, V. albo-atrum Reinke & Berth. was also isolated from infected hop plants, and thus both species of the fungus were shown to be the causal agents of the disease in Oregon. The purpose...
Resource Type:: Dissertation
Full Text:: of the disease in Oregon. The purpose of this research was to study temperature rela- tions and

Fungitoxicity of silver salts

Creator:: Guilford, Roger Kirby
Abstract:: The demand for new fungicides to control plant diseases has led to experimentation with both previously used and newly developed fungicides. Silver, an older but little used fungicide, was selected for evaluation because of its high toxicity to microorganisms. Silver nitrate and a silver electrolytic cell were tested as potential...
Resource Type:: Masters Thesis
Full Text:: gradually diminished. Ionic silver was not phytotoxic to sword -fern fronds or potato tubers at

Production of polygalacturonase and macerating enzymes by Phoma menthae

Creator:: Melouk, Hassan Aly
Abstract:: The fungus Phoma menthae Strasser causes black lesions and cankers on stems and rhizomes of Mentha piperita L. The purpose of this thesis was to: 1) study the production of polygalacturonase (PG) and macerating enzymes (ME) by P. menthae in vivo and in vitro, 2) study the effects of phenolic...
Resource Type:: Dissertation
Full Text:: days old. ME activities were determined by an optical density method, using potato discs as substrate

Survival of Verticillium dahliae in soil

Creator:: Carlstrom, Robert Charles, 1928-
Abstract:: Three Oregon soil types (Chehalis silt loam (CSL), an alluvial soil from the Willamette Valley; Ayre sandy loam (ASL), a volcanic pumice soil from the Central high desert; and Klamath fine sandy loam (KFSL), a basaltic mineral soil from the Klamath Basin) were collected adjacent to fields which had been...
Resource Type:: Dissertation
Full Text:: from potato pro- duction due to Verticillium wilt caused by the soil-borne fungus Verticillium

Contracting nucleolar vacuoles in somatic tobacco cells growing in microcultures

Creator:: Johnson, John Morris
Abstract:: Contracting nucleolar vacuoles are a general and consistent feature of somatic tobacco cells growing in microcultures. Nucleolar vacuoles were studied in cells from callus tissues of two single-cell clones, H-196 and H-239, of hybrid tobacco (Nicotiana tabacum X N. glutinosa). Vacuoles periodically contracted either completely or incompletely, apparently releasing a...
Resource Type:: Dissertation
Full Text:: carota var. sativa), potato (Solanum tuberosum), wheat (Triticum aestivum), annual bristleweed

Fungi associated with Douglas-fir seed during cone development, seed processing, and storage

Creator:: Gordon, Lewin Roland
Abstract:: The Pacific Coast form of Douglas-fir in natural forest succession is an intermediate species thriving in the Coast Range and Cascade Mountains of the Pacific Northwest. This species constitutes 26 percent of the standing timber in the United States, and 24 percent of the nation's annual timber harvest. Characteristics of...
Resource Type:: Masters Thesis
Full Text:: different temperatures. Periodically, stored seed were plated on potato dextrose agar following surface

The role of Verticillium albo-atrum Reinke and Berth in seed transmission and induction of a latent disease of Pelargonium

Creator:: Koocheki, Hormozdyar Khodadad
Abstract:: Many initially healthy Pelargonium seedlings developed symptoms of Verticillium wilt in an Oregon State University greenhouse when they attained blooming age. The symptoms first appeared in May as "edge burning," yellowing, and wilting of leaves. In late summer, these seedlings which were the offspring of Verticillium infected plants, became severely...
Resource Type:: Masters Thesis
Full Text:: exten- sive research on "Verticillium Hadromycosis" lists some of the names that have been given to

Characterization of pectic enzymes produced by Fusarium oxysporum f. lycopersici

Creator:: Young, Robert J.
Resource Type:: Dissertation
Full Text:: macerated potato tuber tissue readily with optimum activity in the pH range 3. 0 -3. 5. Fractions

The effects of univalent cations on the activity of particulate starch synthetase

Creator:: Nitsos, Ronald Eugene
Resource Type:: Dissertation
Full Text:: corn (30, 57), rice (2, 75), waxy and nonwaxy maize (32, 77), 17 sweet potato and taro roots (69

ScholarsArchive@OSU

The effects of DMSO on wound periderm formation in potato tuber tissue

Verticillium wilt of hops : pathogenicity, host range, and temperature relations of the causal agents

Fungitoxicity of silver salts

Production of polygalacturonase and macerating enzymes by Phoma menthae

Survival of Verticillium dahliae in soil

Contracting nucleolar vacuoles in somatic tobacco cells growing in microcultures

Fungi associated with Douglas-fir seed during cone development, seed processing, and storage

The role of Verticillium albo-atrum Reinke and Berth in seed transmission and induction of a latent disease of Pelargonium

Characterization of pectic enzymes produced by Fusarium oxysporum f. lycopersici

The effects of univalent cations on the activity of particulate starch synthetase

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