Biology Commons^™

Aquatic Ascomycetes From Lake Itasca, Minnesota, A. R. Cavaliere

Biology Faculty Publications

A preliminary report of the aquatic Ascomycetes of Lake Isasca, Minnesota. Included is an introduction, methods of harvesting and studying, a key, description, and illustrations of 19 common ascomycetous fungi inhabiting the study area.

Germination Ecology Of Three Chihuahuan Desert Crucifers, Larry L. Bell

Dissertations and Theses @ UNI

Seeds of Lepidium lasiocarpum Nutt., Lepidium medium Greene var. medium, and Descurainea pinnata (Walt.) Britton ssp. ochroleuca (Woot.) Detling, native to the Chihuahuan Desert, were tested for their germination responses under conditions of constant and fluctuating temperatures, light and dark sensitivity, and different seed depths in soil. The effects of a three day drying period alternating with one day of moisture at field capacity was also investigated. All three species germinated optimally under fluctuating temperatures with low temperatures near 5-10°c and high temperatures near 20-25°C. L. lasiocarpum seeds responded better to fluctuating temperatures of 15°c magnitude than to fluctuations of …

Bulletin No. 20: Tidal Marsh Invertebrates Of Connecticut, Nancy C. Olmstead, Paul E. Fell

Bulletins

36 pp. 1974. Descriptions and illustrations of over 40 species of mollusks, crustaceans, arachnids and insects found on our tidal marshes.

Coastal Vegetational Communities Of The Two Texas Barrier Islands, Boca Chica And Brazos, Baltazar Cisneros

Theses and Dissertations - UTB/UTPA

Two Texas barrier islands, Boca Chica and Brazos, have unique coastal vegetational communities that may be Influenced by several environmental factors. These environmental factors include temperature, precipitation, wind speed, sunshine exposure, day length, and dune height. The purpose of this investigation was to determine the total number of coastal plant species per station, season, and year and to consider environmental factors that may significantly affect the number and pattern of coastal species. Coverage comparison between aerial and land sampling and aerial vegetational zonation was also considered.

Results indicated the presence of 21 angiosperm families and a total of 54 species. …

Meiotic And Mitotic Chromosomes Of Fritillaria Atropurpurea Nutt., John Keith Archibald

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The purpose of this paper is to provide information concerning the number, structure, and behavior of chromosomes in the plant species Fritillaria atropurpurea. The material used for this investigation included both floral buds and root-tips from actively growing naturally occurring plants collected from populations in both Utah and Nevada, and root-tips from seed germinated in the greenhouse. The results obtained include a karyotype analysis of mitotic chromosomes, a discussion of meiosis, a discussion of B-chromosomes, and a series of photographs depicting the stages of mitosis and meiosis in this species.

Fritillaria atropurpurea has a diploid chromosome number of 24, …

Ua66/1/2 Scrapbook, Wku Ogden College Of Science & Engineering

WKU Administration Documents

Scrapbook of clippings, press releases, photographs and other items related to the history of Ogden College of Science & Technology from 1961 to 1974.

Tree Ring-Widths In Pinus Ponderosa And Pseudotsuga Menziesii As Indicators Of Past Annual Precipitation, Gerald L. Bliss

All Master's Theses

This paper presents a study designed to determine how well tree ring-widths in Pinus ponderosa and Pseudotsuga menziesii indicate the past annual precipitation in the area of the Rimrock-Tieton Dam, Yakima County, Washington. The study was based on ten trees sampled from a small homogeneous site selected for apparent dryness. A Swedish increment bore was used to extract four cores from each tree. The cores were mounted, dated, measured, and standardized. Linear regression and correlations were used to analyze the data. The results revealed that Pseudotsuga menziesii ring widths are slightly better indicators of the annual precipitation than the ring-widths …

Douglas-Fir Seed Volatile Oils In Seed Detection By Deer Mice, Millard S. Deusen

All Master's Theses

This study investigated the role of the volatile oils of Douglas-fir seeds in olfactory seed detection by deer mice. The removal of these volatile oils from the seed reduces the ability of the deer mice to detect the seeds.

A method is outlined for the removal of the volatile oils from the seeds as well as a method to purify the oils for possible identification and quantification of individual components.

A Comparison Of Two Artificial Substrates In The Determination Of Net Primary Production, Leland C. Faulconer

All Master's Theses

This study was to determine if a significant difference exists between two types of artificial substrates used to measure the growth rate of periphyton in a warm spring. Chlorophyll was used as an indirect measure of biomass in comparing the substrates and estimating net primary production. A semi-quantitative algal survey was done for each of the sites sampled.

The study was carried out for one year and it was demonstrated that there was a statistically significant difference between the two substrates.

The Effect Of Applied Nitrogen And Subterranean Clover On The Growth Of Doublegee, D J. Gilbey

Journal of the Department of Agriculture, Western Australia, Series 4

Until 20 years ago doublegees in Western Australia were mainly confined to the red-brown earth soils of the wheatbelt.

Since then, they have spread to light loamy sand soils in the wheatbelt, many of which have carried subterranean clover from the mid-1940s onwards.

It has been widely presumed that the spread of doublegees on to the lighter sandy soils of W.A. can be associated with the establishment of subterranean clover on these soils.

This report summarises the results of a glasshouse experiment on the effect of clover and nitrogen on the growth of doublegee.

A Taxonomic And Distributional Survey Of The Benthic Blue-Green Algal Flora Of The Skokomish River Estuary, Louis J. Boitano

All Master's Theses

This paper presents a taxonomic and distributional survey of the benthic blue-green algal flora within an estuary system. Physical parameters were considered in the seasonal growth and distribution of algal species. A majority of the observed species occur in all habitats of the estuary and are present throughout the year. Seasonal growth rates and distribution are primarily dependent upon light intensity, temperature, salinity, and substrate condition. The largest extent of growth and distribution occurs in the late spring and summer months at which time the abiotic factors are most favorable for the development of benthic algal communities.

The Effectiveness Of The Nitrate Ion Selective Electrode As A Qualitative Method For Low Levels Of Nitrate, Linda Blaine

Masters Theses & Specialist Projects

The nitrate ion specific electrode has been used to measure nitrate concentration in plant tissue. Nitrate concentration, as nitrate ion activity, can be read rather simply in an aqueous extract of the plant tissue in somewhat the sane manner as a pH measurement would be taken, In contract to more time consuming chemical methods.

A previous study of nitrate concentrations in barley treated with the growth retardant chemical, B-Nine (succinic acid 2, 2 dimethylhydrazide), had been carried out by the colorimetric method of Wooley, Hicks and Hageman. The study indicated lower nitrate concentrations in treated plants, as compared with untreated …

A Phytosociological Study Of A Relict Hardwood Forest In Barren County, Kentucky, Christine Bougher

Masters Theses & Specialist Projects

Although general information is readily available concerning the structure and composition of deciduous forests, especially in the eastern part of the United States, there seems to be little specific information concerning forest composition in the Commonwealth of Kentucky. The lack of phytosociological studies prior to the development of the land, and the extent of land development in Kentucky, has led to a paucity of information regarding the natural forest vegetation of the Commonwealth. To the author's knowledge, there are few publications dealing with the vegetational composition of relict or virgin forests in Kentucky. It is apparent that there is a …

Cytogenetic Effects Of Vitavax Fungicide On Secale Cereale On Allium Cepa, Jack Ernest Staub

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The effects of Vitavax fungicide (2,3-dihydro-5-carboxanilido-6-methyl-1,4-oxathiin) on meiotic chromosomes of rye (Secale cereale) and mitotic chromosomes of onion (Allium cepa) and rye were observed.

The principal aberrations recorded in pollen mother cells of rye were: 1-4 univalents at metaphase I; sticky bridges at telophase I; and micronuclei and misshapen nuclei at the quartet stage.

The principal aberrations recorded in root tip mitoses in onion and rye were: chromosome fragmentation, disintegration, clumping, aggregation and inhibition of mitosis.

All meiotic phases were significantly affected by 1,000, 5,000,10,000, 33,300, 66,600 ppm Vitavax at the 48, 72, and 96 hour …

Temperature Effect On Leaf Water Potential Measurements, Rex J. Prosser

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Silver foil psychrometers were used to monitor water potential in different portions of maize leaves which were subjected to temperature gradients. The psychrometers were preliminarily calibrated over standard NaCI solutions at temperatures ranging from 5°C to 45°C in an aluminum plate apparatus designed to provide uniform temperatures within each psychrometer even while overall temperature was changing. Based on the calibrations, empirical temperature correction equations were derived and used to correct psychrometer readings at different temperatures to equivalent values at 25°C. Temperatures on a single maize leaf were varied by placing the long leaf through an insulated box with several compartments …

Photosynthesis And Respiration Of Arceuthobium Tsugense, James Roger Miller

Dissertations and Theses

Dark respiration rates of the aerial shoots of Arceuthobium tsugense, obtained by manometric and IRGA techniques, show production of C0₂to range between 155-300 µl CO₂ g^-1h^-1 with evidence of seasonal variation. Experiments with ¹⁴C0₂ indicate that the aerial shoots are capable of some photosynthetic CO₂ fixation, with 10-15% of the available ¹⁴C incorporated by the plant tissue in one hour.The portions of the o aerial shoots which are most active in C0₂ fixation are the young terminal regions. Biochemical characterization of the products of photosynthesis reveals that 80-90% of …

Karyology And Sex In Clematis Ligusticifolia Nutt. (Ranunculaceae), Darrel A. White

All Master's Theses

An investigation was conducted to determine the relationship between sex and karyology in Clematis ligusticifolia Nutt. (Ranunculaceae), a dioecious perennial.

Chromosome number and karyology of this species are discussed and a review of some of the major works of previous investigators of sex determinism in dioecious angiosperms is included.

A Taxonomic Study Of The Balsamorhiza Hookeri Nutt. Balsamorhiza Hirsuta Nutt. Complex, Mary Clay Muller

All Master's Theses

In this study a multivariate statistical analysis utilizes the linear discriminant function that has been used to substantiate the shift of the variety lagocephala (Sharp) Cronq., from Balsamorhiza hirsuta, to B. hookeri (Cronquist, 1955). This method can be used to determine the placement of other questionable taxa.

In addition, this paper deals with the history, morphology and distribution of B. hirsuta, B. hookeri var. hookeri, and B. hookeri var. lagocephala.

Low Temperature Germination Of Tomato Seeds, Dawn M. Gatherum

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The purpose of this study was to determine the pattern of inheritance of low temperature germination of tomato. This was accomplished by crossing a tomato (P.I. 341988) that germinates at a low temperature (10 C) with a commercial mechanical harvest cultivar (VF 145-B-7879). The parents, F₁, F_2, and F₃ progenies were tested for low temperature germination responses at 10 C for 15 days. The results show that a single recessive gene is responsible for the low temperature germination character.

Also, a study of the seed coat thickness of the tomatoes VF 145-B-7879 and P.I. 341988 was …

Inorganic Mercury Uptake And Mercury Tolerance Demonstrated By Several Species Of Algae, Daniel S. Filip

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The inhibition by low concentrations of inorganic mercury has been established for several species of freshwater algae, and a method has been developed to determine mercury levels in algal cells, having good precision at levels as low as one hundred parts per billion.

Rapid sorption of inorganic mercury by glassware was minimized by using heavy algal cultures and short term incubations. The rates and extent of mercury uptake by three species of freshwater green algae were delineated under laboratory conditions. Replicate mercury containing cultures yielded slightly different mercury concentrations upon analysis due to analytical errors and glass sorption. Therefore, percent …

Cynipid Gall Anatomy And Distribution Of The Causal Organism, David E. Murray

Morehead State Theses and Dissertations

A thesis presented to the faculty of the School of Sciences and Mathematics at Morehead State University in partial fulfillment of the requirements for the Degree of Master of Science in Biology by David E. Murray on April 28, 1972.

The Algal Flora (Excluding Class Bacillariophyceae) Of Foster's Pond, Allen County, Kentucky, Linda Garrett

Masters Theses & Specialist Projects

A systematic survey of the algal flora (excluding Class Bacillariophyceae) of Foster's Pond, Allen County, Kentucky, was conducted from January 29, 1970, to March 25, 1971. Physical and chemical data were taken in order to characterize the quality of the water and examine its relationships to floral composition and periodicity insofar as the level of discrimination employed permitted.

A total of 119 taxa representing five divisions were identified. Twenty-five of these were previously unreported for the State of Kentucky.

Members of the Division Chlorophyta, which composed 66.4% of all the identified taxa, dominated the flora throughout the year. Desmid and …

The Riparian Vegetation Of Swauk Creek, Edward L. Schneider

All Master's Theses

An investigation was made to document the structure and composition of the flora along Swauk Creek, a riparian transect into Central Washington's Cascade Range. Distributions of the major species are discussed and a key has been constructed to facilitate identification of the riparian associations.

Effects Of Dmso And Propham On Mitosis In Root Tips Of Secale Cereale, Max Rosequist

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

DMSO (dimethyl sulfoxide) and propham (isopropyl carbanilate) were investigated to determine their effect singly and in combination on mitoses in rye (Secale cereale) root tip cells. Root tips were prepared for observation by the paraffin and aceto-carmine squash methods. Results showed DMSO caused the following abnormalities: arrested metaphases, multipolar spindles, multinucleate cells, stickiness, shortened chromosomes, and mitotic inhibition. Cells from propham treated root tips exhibited the same abnormalities as those treated with DMSO. In addition, propham treatments resulted in polyploid cells and chromosome granulation. In combination, DMSO and propham caused all the abnormalities mentioned above except polyploidy. In …

Cause And Control Of A Common Market Disease Of Lettuce, William Palmore

Masters Theses & Specialist Projects

Head lettuce, Lactuta sativa var. capitata, is susceptible to a number of economically important diseases, the most frequent being russet spot, rib discoloration, and vascular browning (28), which have been shown by Ceponis and Friedman (7) to be caused by Pseudomonas marginalis. Pseudomonads are common plant pathogens and cause such diseases as halo blight in beans (20), bacterial blight in soybeans (20), and bacterial wilt of the bird-of-paradise (27) and tobacco (24).

Plants that develop symptoms similar to russet of lettuce are oats, infected by Pseudomonas cichorii, and tobacco infected with Pseudomonas tobaci (34). In general, russet symptoms …

Review Of Die Infloreszenzen: Typologie Und Stellung Im Aufbau Des Vegetationskorpers. Zweiter Band. 1 Teil, By Wilhelm Troll. Gustav Fischer, Jena, 1969, Robert B. Kaul

School of Biological Sciences: Faculty Publications

Review of Die Infloreszenzen: Typologie und Stellung im Aufbau des Vegetationskorpers. Zweiter Band. 1 Teil, by Wilhelm Troll. Gustav Fischer, Jena, 1969.

Morphology And Development Of The Flowers Of Boottia Cordata, Ottelia Alismoides, And Their Synthetic Hybrid (Hydrocharitaceae), Robert B. Kaul

School of Biological Sciences: Faculty Publications

The inferior ovary of Boottia cordata, Ottelia alismoides, and their hybrid is appendicular in nature, the carpels are congenitally only slightly connate, and they are unsealed. All floral organs except the sepals originate from common primordia in the female and bisexual flowers. A flat residual floral apex is present. There is a vestigial superior ovary of three ontogeneticallv fused carpels in the male flower of Boottia cordata. The hybrid is intermediate in many characteristics and has partially fertile stamens and staminodia. The sequence of development in all flowers is acropetal. These plants appear to be related to …

The Effect Of Two Growth Retardant Chemicals, Cycocel And B-Nine, On Certain Nitrogeneous Components In Barley Seedlings, Linda Kinser

Masters Theses & Specialist Projects

Certain chemicals are known to inhibit growth in many plant species. These chemicals possess a common trait, the ability to inhibit stem elongation by suppressing the activity of the subapical meristematic region (11). These growth retardants have been extensively studied during the past several years in an effort to determine the biochemical mechanism responsible for reduction in plant height. The characteristic effect of these chemical retardants on the growth pattern has been described as producing plants with shorter, thicker stems and broader, darker green leaves. Tolbert, however, noted that although plants treated with the plant growth retardant, Cycocel, (2-chloroethyltrimethlammoniumchloride) and …

The Effects Of Herbicides On Three Soil Inhabiting Blue Green Algal Species, Lee C. Darlington

All Master's Theses

The object of this study was to examine the effects of varying concentrations of 2, 4-D, Dalapon, and Tordon on the growth of several nitrogen-fixing blue-green algal species obtained from soil samples and grown under culture conditions in the laboratory.

The Uptake Of Calcium By Iso Lines And Kentucky Varieties Of Nicotiana Tabacum L., Francis J. Shay

Morehead State Theses and Dissertations

A thesis presented to the faculty of the School of Sciences and Mathematics at Morehead State University in partial fulfillment of the requirements for the Degree of Master of Science in Biology by Francis J. Shay on July 18, 1968.