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An ecological study of the vegetation of the Bear River Migratory Bird Refuge, Box Elder County, Utah

Creator:: Kaltwasser, Robert George
Abstract:: During the summers of 1971, 1972, and 1973, a general floristic ecological survey of the naturally-occurring vegetation of the Bear River Migratory Bird Refuge in Utah was carried out. Ten community types were identified and characterized. These included two aquatic communities, the Potamogeton pectinatus (Pope) and the Ruppia maritima/ Zannichellia...
Resource Type:: Masters Thesis
Full Text:: (1) Compositae, (2) Chenopodiaceae, and (3) Gramineae. In 1972 the three largest families were (1

Taxonomy and host specificity of the genus Agrobacterium

Creator:: Anderson, Arthur Robert
Abstract:: One hundred seventy-eight Agrobacterium isolates, 120 United States (U.S.), 26 Australian and 32 of miscellaneous origin, were characterized for their reactions to 20 biochemical and physiological tests. Isolate pathogenicity and degree of host specificity, utilization of nopaline and octopine, and sensitivity to agrocin-84 also were determined. The U.S. isolates were...
Resource Type:: Dissertation
Full Text:: host. 3 Bibliography 1. Elliott, C. 1951. Agrobacterium tumefaciens, p. 6. In Manual of Bacterial

An investigation into the ecology and distribution of Kalmiopsis leachiana (Hend.) Rehder

Creator:: Marquis, Robert John
Abstract:: Ecological factors associated with the relictual distribution of the endemic shrub Kalmiopsis leachiana (Ericaceae) were investigated. A prostrate evergreen species with small coriaceous leaves, K. leachiana is restricted to two disjunct populations in the Siskiyou Mountains and southern Cascade Mountains of southwestern Oregon, USA. Exact distributions of individual populations were...
Resource Type:: Masters Thesis
Full Text:: ), differing from low elevation site by the absence of a broadleaf sclerophyll canopy; and (3) Southern

The life history of Anisogramma anomala (Pk.) E. Müller (Diaporthaceae) and its pathological and epidemiological association with Corylus avellana L.

Creator:: Gottwald, Timothy Ross
Abstract:: Eastern Filbert Blight, caused by Anisogramma anomala (Peck) E. Miller, was first discovered in the Pacific Northwest in 1974. Orchard experiments suggest that the fungus completes its life cycle in two years. Infection takes place from mid-January to May, mainly through mite-galled-buds infested with an Eriophyid mite, Phytocoptella avellanae Nal....
Resource Type:: Dissertation
Full Text:: Presented on August 3, 1979 Title: THE LIFE HISTORY OF ANISOGRAMMA ANOMALA (PK.) E. MULLER (DIAPORTHACEAE

The role of ethylene in ectomycorrhiza formation and Fusarium infection of Douglas fir roots

Creator:: Graham, James Herbert
Abstract:: The ectomycorrhizal fungi Cenococcum geophilum, Hebeloma crustuliniforme and Laccaria laccata produced ethylene in vitro in modified Melin-Norkrans liquid medium only if amended with 2.5 to 10 mM methionine; Pisolithus tinctorius failed to produce ethylene unless the cultures were renewed with fresh methionine-amended medium prior to ethylene assay. An additional 19...
Resource Type:: Dissertation
Full Text:: -month-old seedlings to 0.1 ppm ethylene for 3 months whether or not the seedlings had been exposed to

Infection of stressed ponderosa pines by Armillariella mellea from indigenous and artificial inoculum sources

Creator:: Fuller, Lloyd Randolph
Abstract:: Armillariella mellea (Vahl. ex Fr. ) Karst. was grown aseptically in hazel stems (Corylus cornuta var. californica) which were used in the forest to infect 290 ponderosa pines (Pinus ponderosa Laws.) which had been "stressed" in five different manners plus two control groups. All trees were inoculated twice giving a...
Resource Type:: Dissertation
Full Text:: ; 2) severing distal portions of lateral roots; 3) removal of fifty-percent of the cross-sectional

A chemosystematic study of the phylogenetic position of Arabidopsis thaliana (L.) heynh. (Brassicaceae) employing numerical methods

Creator:: Kaplan, Hesh J.
Abstract:: The Brassicaceae, Mustard Family, is a well marked natural family, whose tetramerous flowers, tetradynamous stamens, and distinctive bi- carpellary fruits, clearly distinguish it from related families. It is a large family of some 3, 000 recognized species and over 300 genera. Although numerous attempts have been made over the past...
Resource Type:: Dissertation
Full Text:: 3, 000 recognized species and over 300 genera. Although numerous attempts have been made over the

Epidemiological insights into Armillaria mellea root rot in a managed Ponderosa pine forest

Creator:: Shaw, Charles G. (Charles Gardner) 1948-
Abstract:: Root rot of ponderosa pine caused by Armillaria mellea was studied in a pine forest that had been under management for 30 years in Klickitat County, Washington. Information sources included disease survey, detailed observation and description of specific disease situations, and examination of roots in situ and removed. Roughly circular...
Resource Type:: Dissertation
Full Text:: examination of the outer zones disclosed that, in stands containing trees from 3 to 6 inches in diameter

Taxonomic studies of the Eucephalus complex of Aster in the Pacific Northwest

Creator:: Thompson, Dennis Dean
Resource Type:: Masters Thesis
Full Text:: assistance* TABLE OF CONTENTS I Introduction 1 II Literature Review 3 III Methods and Materials 8

The distribution of intertidal diatoms associated with the sediments of Yaquina Estuary, Oregon

Creator:: Amspoker, Michael C.
Abstract:: Sediment samples were collected from eight sampling sites along the Yaquina Estuary, Oregon from Yaquina Bay to Elk City near the head of the estuary. Samples were collected in November 1973, February 1974, May 1974 and August 1974 from two or three intertidal levels depending on the magnitude of the...
Resource Type:: Dissertation
Full Text:: samples collected at high and low tides for the period of 7 October 1973 to 3 August 1974 at the eight

ScholarsArchive@OSU

An ecological study of the vegetation of the Bear River Migratory Bird Refuge, Box Elder County, Utah

Taxonomy and host specificity of the genus Agrobacterium

An investigation into the ecology and distribution of Kalmiopsis leachiana (Hend.) Rehder

The life history of Anisogramma anomala (Pk.) E. Müller (Diaporthaceae) and its pathological and epidemiological association with Corylus avellana L.

The role of ethylene in ectomycorrhiza formation and Fusarium infection of Douglas fir roots

Infection of stressed ponderosa pines by Armillariella mellea from indigenous and artificial inoculum sources

A chemosystematic study of the phylogenetic position of Arabidopsis thaliana (L.) heynh. (Brassicaceae) employing numerical methods

Epidemiological insights into Armillaria mellea root rot in a managed Ponderosa pine forest

Taxonomic studies of the Eucephalus complex of Aster in the Pacific Northwest

The distribution of intertidal diatoms associated with the sediments of Yaquina Estuary, Oregon

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