Index Catalog // ScholarsArchive@OSU

The effects of a mutation within vitamin E biosynthesis upon the development and function of the photosynthetic apparatus

Creator:: Sicher, Richard Charles
Abstract:: A new photosystem-II mutant of the green alga Scenedesmus obliquus D₃, strain PS-28, has been shown to lack a-tocopherol (vitamin E). The photosynthetic activity of dark grown samples of PS-28 is about 20% of the wild-type control. Culturing the mutant at low light intentisites (10⁴ ergs/sec-cm ²) stimulates photosynthetic activity...
Resource Type:: Dissertation
Full Text:: ; Griffiths, 1966; Barr, et al., 1967). In older literature reference is made to 13 a plastoquinone D

The effects of ozone on the growth, rhizosphere population dynamics, and mycorrhizal colonization of wheat

Creator:: Kimball, Shannon M.
Resource Type:: Masters Thesis

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:: distribution (Griffiths, 1967). From these curves, Inmans (1952) mean and median diameters, sorting

Phenotypic variation in diploid and tetraploid populations of Claytonia perfoliata (s.l.) (Portulacaceae)

Creator:: Miller, John M.
Abstract:: Meiotic chromosome counts from 200 populations of Claytonia (Montia) perfoliata (sensu lato) reveal a polyploid pillar complex based on three morphologically different, chemically distinct, and geographically defined diploids. The basic chromosome number is x=6. Diploid C. perfoliata Willdenow with linear juvenile leaves and deltoid mature basal leaves ranges southeastward from...
Resource Type:: Dissertation
Full Text:: (1834) and T. J. Howell (1893) respectively, and in many past taxonomic treatments these two epi

Brown rot of fruits and fruit trees in Oregon

Creator:: Posey, Gilbert Bradley
Resource Type:: Masters Thesis
Full Text:: , " ApricotBrenches & spurs, spores C308 3/21/15 n ' n n C3O Li./6/i Portland," 't 't C399 L/1/l5 " 't tl B839 3

Occurrence, transmission, and properties of strains of cucumber mosaic virus that are seed-transmitted in Phaseolus vulgaris

Creator:: Davis, Robert Francis
Abstract:: A survey of major bean (Phaseolus vulgaris) breeding programs and seed producing areas in Idaho, Washington, and Oregon was conducted to determine the occurrence of cucumber mosaic virus (CMV), recently reported to be seedborne in beans. Some 259 plants, sampled from breeding lines of diverse germplasm, were found by enzyme-linked...
Resource Type:: Dissertation
Full Text:: Scott in 1963 (86). A modification of this method, for more rapid purification, was developed by Lot et

Physiological ecology and structure of benthic communities in a woodland stream

Creator:: Reese, Weldon Harold
Abstract:: This thesis reports a portion of a general ecological study of a stream under conditions of controlled flow and low levels of organic enrichment. It is concerned with the effects of experimental variations of light intensity and concentration of soluble organic enrichment imposed on seasonal variations of temperature and total...
Resource Type:: Dissertation
Full Text:: (Phycclogv) (Name) (Degree) (Major) Date thesis is presented t;ay 9, 1966 Title PHYSIOLOGICAL ECOLOGY

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:: 4-1 to U 4-9 4-) a) a) En a;11-;1 hl .< T-1 Bellingham 7 79 14 (32) T-2 Everett 77 23 (31) C

Distribution and variation of Armillariella mellea clones in relation to vegetative cover and severity of root rot in Ponderosa pine

Creator:: Cooley, Sally Joan
Abstract:: Root rot due to Armillariella mellea (Vahl. ex Fr.) Karst. is unusually severe in ponderosa pine near Glenwood, Washington. Isolate relations, clonal variability, vegetation patterns, and climate were examined in relation to severity of disease in this area. Ninety-one isolates from 70 infection centers were examined. Pairings of neighboring isolates...
Resource Type:: Masters Thesis

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:: Studies in the Morphology and Life History of Anisogramma Anomala T. R. Gottwald Department of Botany and

ScholarsArchive@OSU

The effects of a mutation within vitamin E biosynthesis upon the development and function of the photosynthetic apparatus

The effects of ozone on the growth, rhizosphere population dynamics, and mycorrhizal colonization of wheat

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

Phenotypic variation in diploid and tetraploid populations of Claytonia perfoliata (s.l.) (Portulacaceae)

Brown rot of fruits and fruit trees in Oregon

Occurrence, transmission, and properties of strains of cucumber mosaic virus that are seed-transmitted in Phaseolus vulgaris

Physiological ecology and structure of benthic communities in a woodland stream

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

Distribution and variation of Armillariella mellea clones in relation to vegetative cover and severity of root rot in Ponderosa pine

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

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