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A revision of Juncus subgenus genuini (Juncaceae) in the Pacific states

Creator:: Lint, Harold LeRoy
Abstract:: A study was made of the subgenus Genuini of the genus Juncus in the Pacific States, California, Oregon and Washington. Extensive morphological comparisons, geographical distributions, habitat differences and observations of apparent presence or absence of natural hybrids provided the major data sources. Cytological studies were made, but were inconclusive. Eleven...
Resource Type:: Dissertation
Full Text:: complex, J. filiformis and J. patens appears to be distinctive and presents no taxonomic problems

An improved method for the isolation of [triangle]²-IPP:tRNA isopentenyltransferase activity from Saccharomyces cerevisiae

Creator:: Kee, Saik Chuan
Resource Type:: Masters Thesis
Full Text:: pathway comes from a recent report by Burrows (12) that dihydrozeatin and N 6 -(2-hydroxybenzyl)adenosine

The effects of cadmium on the nitrogen fixation system in Alnus rubra

Creator:: Wickliff, Carlos
Abstract:: Alnus rubra (Bong. ) seedlings were grown in sand culture and irrigated with nutrient solution containing CdCl₂ ranging from 5 μg to 100 mg per liter. Treatment of A. rubra seedlings for 4 weeks with 50 and 100 mg CdCl₂ per liter of nitrogen-free nutrient solution decreased in situ nitrogenase...
Resource Type:: Dissertation
Full Text:: , at 10 and 20 p.g CdC12 per liter, respectively. No detectable nitrogen fixation was observed at

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:: treatment. More infections occurred on trees of excellent than poor vigor, but no differences in

The glutamine synthetases in soybean root nodules and free-living Rhizobium japonicum

Creator:: Guevara, Juan Garcia
Abstract:: Glutamine synthetase activity is present in both the cytosol and bacteroid fractions of soybean root nodules. Total activity measurements indicate that at least 90% of the activity in nodules is located in the cytosol. Results reported by McParland, et al. (29), showed that many properties of glutamine synthetase from nodule...
Resource Type:: Dissertation
Full Text:: contain adenylyl groups. In contrast, no evidence has been found for adenylylation or deadenylylation of

Studies on the vesicular-arbuscular mycorrhizae of Easter lily in the Pacific Northwest

Creator:: Ames, Robert Norman
Abstract:: A study was conducted to characterize the vesicular-arbuscular (VA) mycorrhizal fungi of commercially grown Easter lily. Monthly field soil and root samples were collected from March through September, 1975, from five fields in the coastal area of southern Oregon and northern California. Soil sievings were inoculated onto clover, onion and...
Resource Type:: Masters Thesis
Full Text:: high fertilizer than no fertilizer. The most mycorrhizae formed in plants given the low fertilizer

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:: the least convenient, group- ings, no proposal has met with general acceptance. This investigation

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:: stimulated (0.01-0.05 ppm), had no effect on (0.05-0.15 ppm), or inhibited (> 0.15 ppm) lateral root

Factors affecting germination of endomycorrhizal spores

Creator:: Daniels, Barbara Ann
Abstract:: Four isolates of Glomus mosseae, collected from diverse geographic locations, were pot cultured on varied host plants or stored in the same soil as collected. Spores of three isolates failed to germinate on any of five agar media while the fourth germinated well on all media. Lack of germination on...
Resource Type:: Dissertation
Full Text:: tested had little or no effect. Maximum spore germination occurred in soil at or above field capacity

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:: determine their host range. The host specificity of all isolates varied greatly with no isolate infecting

ScholarsArchive@OSU

A revision of Juncus subgenus genuini (Juncaceae) in the Pacific states

An improved method for the isolation of [triangle]²-IPP:tRNA isopentenyltransferase activity from Saccharomyces cerevisiae

The effects of cadmium on the nitrogen fixation system in Alnus rubra

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

The glutamine synthetases in soybean root nodules and free-living Rhizobium japonicum

Studies on the vesicular-arbuscular mycorrhizae of Easter lily in the Pacific Northwest

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

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

Factors affecting germination of endomycorrhizal spores

Taxonomy and host specificity of the genus Agrobacterium

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