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The Use Of Microscopic Vegetative Characteristics And Leaf Characteristics And Leaf Deterioration Rates In The Formulation Of Keys Of Some Wetland Plants, Bruce Foy Williams

Biological Sciences Theses & Dissertations

Leaves of Spartina alterniflora, Spartina patens, Spartina cynosuroides, Distichlis spicata, Phragmites communis, Juncus roemerianus, Scirpus robustus, Typha latifolia, Iva frutescens, and Baccharis halimifolia were examined microscopically. Characteristics of each species were then used to develop identification keys. In addition, leaf fragments were buried in the marsh substrate to simulate a dredging and/or filling operation. At weekly intervals during each season of the year, a leaf fragment of each species was processed and examined to see if it could be identified.

Viola Rugulosa Greene, P. Blair

Specimens by Name

No abstract provided.

Rare Vascular Plants Of Maine : A Critical Areas Program Report, Susan C. Gawler, L. M. Eastman

Maine Collection

Rare Vascular Plants of Maine : A Critical Areas Program Report

Based on Rare Vascular Maine Plants (1978) with Additional Herbarium Data and Rare Plants Information by L.M. Eastman.

Introduction, Criteria, Annotated Rare Plant List, Species Accounts, Additional Herbarium Data, County & Town Index Editing by Susan C. Gawler.

Executive Department, State Planning Office, 189 State Street, Augusta, Maine, 04333 (June 1981).

Contents: Acknowledgements / List of Tables / List of Figures / Part One: Introduction / Part Two: List of the Rare Vascular Plants of Maine / Part Three: Species Accounts / Part Four: Subspecific Taxa / Appendices / …

The Prairie Naturalist Volume 13, Number 2. June 1981

The Prairie Naturalist

HERPETOFAUNA OF MORMON ISLAND PRESERVE, HALL COUNTY, NEBRASKA ▪ S. M. Jones, R. E. Ballinger and J. W Nietfeldt

COYOTE USE OF PLAYAS IN THE TEXAS HIGH PLAINS ▪ R. W. Whiteside and F. S. Guthery

NEW RECORD OF THE LEAST WEASEL IN WYOMING ▪ M. R. Stromberg, D. E. Biggens and M. Bidwell

STATUS OF AMERICAN WOODCOCK IN NEBRASKA WITH NOTES ON A RECENT BREEDING RECORD ▪ G. R. Lingle

WINTER FOODS OF THE PINE GROSBEAK IN EASTERN NORTH DAKOTA ▪ R. C. Reigh

SEASONAL VARIATION IN HOME RANGE OF A FEMALE BADGER (Taxidea taxus) ▪ R. …

Higher Plant Acclimation To Solar Ultraviolet-B Radiation, Ronald Robberecht

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Plant acclimation to natural and intensified solar UV-B irradiance was investigated in three species, Oenothera stricta Ledeb., Rumex obtusifolius L., and R. patientia L. The objectives of this study were to determine: (1) the relationship between plant sensitivity and epidermal UV attenuation, (2) the effect of phenotypic changes in the leaf epidermis, resulting from UV-B exposure, on plant sensitivity to UV radiation, and (3) the plasticity of these changes in the epidermis leading to plant acclimation to UVB radiation.

Epidermal UV transmittance was found to differ in magnitude and spectral distribution among the three species examined in this study. Epidermal …

Fall Regrowth Of Crested Wheatgrass And Fourwing Saltbush, Noor Mohammad

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

During 1980-81, studies with crested wheatgrass (Agropyron desertorum) and fourwing saltbush (Atriplex canescens) were conducted in controlled environment growth chambers as well as under field conditions to achieve the following objectives:

1. To determine the effect of nitrogen fertilizer on the water use efficiency.

2. To determine the effects of various temperature, water stress and nitrogen treatments on the productivity, nitrogen content and carbohydrate reserves.

3. To determine the effects of N fertilization on fall and spring regrowth.

Crested wheatgrass and fourwing saltbush plants were maintained in three growth chambers for 60 days under three temperature …

Crown And Root Rot Of Alfalfa In Utah, Victoria Allard Turner

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Symptoms of dark crown necrosis were found in all fields and varieties of alfalfa examined throughout the state. No significant differences were noted among varieties in 1 year old test plots in the amount of disease (Disease Index = D.I.) present in crown tissue. Significant differences were noted in plots 2.4 years and older among the different varieties. Varieties common to all plots did not differ overall; however, varieties responded differently according to location.

Fusarium spp. were most frequently isolated from affected crowns throughout the state, yet, differences in occurrence of species among the different aged plots and fields were …

Impact, Epidemiology And Control Of Crown And Root Rot Of Spring Barley In Utah, Rastri Dey Kidambi

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

A three year study was initiated to study impact, epidemiology and control aspects of crown and root rot of irrigated and dryland spring barley in Utah. Isolations from leading edges of necrotic lesions of infected plants showed Cochliobolus sativus to be most frequently isolated. Yield loss studies showed that the disease had it's greatest effect in kernel weight reduction.

Time course studies of disease initiation, development and progress were made throughout two consecutive growing seasons. Disease initiation began 25-30 days after planting and reached maximum levels at approximately 60-80 days. Soil inoculum levels were determined by the flotation viability method …

Hydraulic Conductivity And Drought Acclimation Of Cotton Root Systems, Derrick M. Oosterhuis

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Hydraulic conductivity of single roots and whole root systems was studied for soil, sand and solution-grown cotton plants (Gossypium hirsutum L.). Conductivity varied widely depending on plant age and growing conditions. Total conductivity for soil-grown plants decreased from 357 x 10^-6 µ1 s^-1 bar^-1 cm^-1 one week after germination to 5 x 10^-6 µ1 s^-1 bar^-1 cm^-1 at boll set. There was a concomitant increase in total root length. Solution-grown plants had higher root conductivities than soil- or sand-grown plants. Root conductance was decreased by low temperatures, lack of oxygen and …

Some Morphological And Chemical Responses Of Blackbrush (Coleogyne Ramosissima) To Goat Browsing: Influences On Dietary Blackbrush Selection By Goats And Cattle, Frederick D. Provenza

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Domestic goats were used to modify the growth form of blackbrush, a spinescent shrub occurring in nearly monospecific stands on several million hectares of rangeland in the southwestern United States. The objective of this research was to evaluate goat browsing as a means of improving these rangelands for cattle. Winter goat browsing stimulated spring twig growth from basal and axillary buds which resulted in increased production.

Twig production by heavily browsed plants (>95 percent removal of current season's twigs) was a function of precipitation, soil depth, branch location on the plant, and period of rest after browsing. As precipitation …

Natural Pastures Of The Macquarie Region Of New South Wales: Their Origin, Composition And Management, David Leslie Michaelk

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Two experiments were conducted in the semi-arid (400 millimeter annual rainfall) Macquarie region of New South Wales, Australia, at the Trangie Agricultural Research Station (31° 59'S; 147° S7'E), to examine (a) the way botanical parameters can be used to separate grazing and climatic impacts on range vegetation, and (b) how this delineation affects application of range science tenets (site, condition and trend) to different pasture types.

Two range sites were studied: Site 1, a light soil type, was dominated by annual grasses, legumes and forbs, whereas perennial grasses (mainly Chloris acieularis and Chloris truncata) dominated the heavy soils of …

Effect Of Mild Water Stress And Enhanced Ultraviolet-B Irradiation On Leaf Growth Of Rumex Obtusifolius L. And Rumex Patientia L. (Polygonaceae)., Steve R. Holman

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Leaves of Rumex obtusifolius L. and R. patientia L.were exposed to combinations of mild water stress and enhanced ultraviolet-B irradiation during their ontogeny. Two UV-B treatments (enhanced UV-B and control) and three water stress treatments (-0.0 MPa, -0.2 MPa and -0.4 MPa rooting medium matric potentials) were employed. The impact of the stress interaction was assessed on the basis of changes in leaf area, average adaxial epidermal cell size, and total number of adaxial epidermal cells per leaf. Although the level of UV-B irradiation applied was insufficient to significantly alter leaf growth at any given water stress, UV-B did interact …

The Energy Expenditure Of Heifers Grazing Crested Wheatgrass Rangeland In West-Central Utah, Kris M. Havstad

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The free-roaming ruminant requires energy for the demands of vii grazing, traveling and thermoregulation that are not required by its confined counterpart. Literature estimates of these additional costs range from 10 to 170 percent above maintenance. The uncertain magnitude of this increased demand and the factors that contribute to it impede the ability of the rangeland ruminant nutritionist to establish guidelines for the energy requirements of the free-roaming herbivore. This study was designed to estimate the energy expenditure of yearling Angus heifers while grazing a declining supply of available crested wheatgrass forage (Agropyron cristatum) on rangeland in west-central …

Alternate Population Limitation Strategies For Feral Horses, Michael L. Wolfe

Aspen Bibliography

No abstract provided.

The Prairie Naturalist Volume 13, Number 1. March 1981

The Prairie Naturalist

EDITOR: Dr. Paul B. Kannowski

BOOK REVIEW EDITOR: Douglas H. Johnson

TABLE OF CONTENTS

WATERFOWL USE OF A MUNICIPAL SEWAGE LAGOON ▪ G-A. D. Maxson

MASS MORTALITY OF MUSSELS FROM SLUMPING ALONG THE RED LAKE RIVER NEAR CROOKSTON, MINNESOTA ▪ A. M. Cvancara, D. J. Brown, D. K. Cudworth, and T. R. Klett

CHRISTMAS BIRD COUNTS FOR NORTH DAKOTA — 1980 ▪ R. N. Randall

BREEDING BIRDS ON WATERFOWL PRODUCTION AREAS IN NORTHEASTERN NORTH DAKOTA ▪ H. F. Duebbert

FURTHER EVIDENCE OF MARSH HAWKS FEEDING ON DUCKS ▪ R. A. Wishert, R. M. Kaminski, and D. W. Soprovich

FIRST NEST …

Function Of Mentzelia Nuda (Loasaceae) Postfloral Nectaries In Seed Defense, Kathleen H. Keeler

School of Biological Sciences: Faculty Publications

Mentzelia nuda is a coarse, short-lived perennial of the High Plains of North America. The flowers secrete nectar which serves as an attractant for pollinating bees. Postfloral nectar secretion attracts ants whose presence significantly enhances seed set. This is the first demonstration of advantage to postflowering activity of a floral nectary.

The Bell Natural History Museum, An Aid To Teaching Botany, Harold W. Hansen

Journal of the Minnesota Academy of Science

Much of the regular academic year does not lend itself to observation of plants in their natural habitat outdoors. The museum exhibits can serve as study aids in the off season, although they should not be utilized as substitutes for field work. This study systematized some materials available for class use. Museum files, display legends, and original observations were used. From the Bell Museum of Natural History, 112 exhibits were listed and coded for location; 384 specimens, of 247 species were listed from individual displays; a massed alphabetized species index was prepared. The exhibit "Maple-Basswood Forest" was studied in detail; …

Composition Of Goldenrod (Solidago: Compositae) Populations By Species In The Upper Midwest, William E. Miller

Journal of the Minnesota Academy of Science

In each of 100 abandoned agricultural fields grown over with goldenrod, stems were diagnosed and counted in 20 occupied 0.4 M plots selected by hoop tossing. Preliminary results differed little between hoop tossing and random plot selection, and between 0.9 and 0.4 m plot sizes. In rank order of stem abundance the taxa were Solidago altissima L. S. canadensis L. complex S. gigantea Ait. S. graminifolia (L.) Saliab. S. nemoralis Ait. S. ulmifolia muhl. others. An average of 2.2 taxa were recorded per field, and three or more taxa in at least one plot in 34 percent of fields. Where …

Nutritional Preferences Exhibited By Plants In Ad Libitum Feed Systems, L. A. Errede

Journal of the Minnesota Academy of Science

Ad libitum feeding plant systems fitted with two reservoirs were used to monitor daily aqueous uptake by plants from paired reservoirs. When the reservoirs contained aqueous solutions of the same chemical composition, a plant accepted nourishment from alternate sources without bias; but when the reservoirs contained different aqueous solutions, i.e. either tap water or standard nutrient solution, a sharp bias was exhibited, depending on the plant's need for mineral nutrient, which changed with time. Eventually a "stable-end-state" was attained, favoring water over the standard nutrient solution in the ratio of 3 to 1. When the plant was pruned severely, however, …

Scaled Chrysophycae From Lake Itasca Region I. Mallomonas, Daniel E. Wujek, Michael M. Weis, Robert A. Anderson

Journal of the Minnesota Academy of Science

By means of electron microscopy, phytoplankton samples from the Lake Itasca region were examined for the silica-scaled chrysophycean genus Mallomonas. Seventeen taxa were observed: 15 are new for Minnesota, of these 15, seven are also new reports for the continental United States.

Initiation And Early Development Of Axillary Buds In Cyclamen, Marshall D. Sundberg

Journal of the Minnesota Academy of Science

The development of axillary buds along the primary shoot axis of Cyclamen persicum Mill. F-1 Rosemunde .was examined. Vegetative buds usually formed in the axils of the cotyledon and first 5 leaves. Flowers were produced from the majority of the buds which developed in the axils of later-formed leaves. The first indication of vegetative bud development was the appearance of a shell zone. Proliferation of the cells set off by this zone soon led to the establishment of a branch shoot apex producing leaf primordia. Formation of a shell zone was not associated with the initiation of floral buds. These …

Report No 41 - A Survey Method For Identifying Roadside Flora Suitable For Conservation In Western Australia, John K. Scott

Fisheries Research Reports

A survey method for identifying flora suitable for conservation alongside roads in south-western Australia was derived from an examination of characteristics of road verges. Two roads, from Midland to Toodyay and from Armadale to Bunbury, were examined. Width of verge, weed cover, soil disturbance, vegetation structure, presence of public utilities, evidence of fire and the type of adjoining land were measured at one mile (1.6 km) intervals on both sides of the road. Also recorded were aesthetic qualities such as stands of beautiful trees and sites of special interest, e.g. the presence of rare plants.

Three variables, percentage weed cover, …

Influence Of Phosphate Source On Vesicular-Arbuscular Mycorrhizae Of Bouteloua Gracilis, Michael F. Allen, James C. Sexton, Thomas S. Moore Jr., Martha Christensen

Department of Plant Pathology: Faculty Publications

Non-mycorrhizal and vesicular-arbuscular mycorrhizal Bouteloua gracilis infected with Glomus fasciculatus were grown in defined media containing different phosphate sources and compared with respect to phosphate content and form, biomass, chlorophyll concentration, and root phosphatase activity. The phosphate sources were sodium monobasic phosphate, a mixture of sodium monobasic phosphate and calcium phytate, and calcium phytate. Inositol and inositol plus calcium were added to the sodium phosphate medium as additional treatments. Mycorrhizal infection was highest in roots of plants grown in the presence of phytate (75%). Lower root infection levels were noted in plants from the sodium phosphate (19%) and mixed phosphate …

Plant Science : Agronomy, Plant Pathology, Entomology At South Dakota State University : A Centennial Report, Lyle A. Derscheid

State, University and Departmental Histories

Subject Headings:
South Dakota State University. Plant Science Department -- History South Dakota State University -- History Agricultural education -- South Dakota -- Brookings -- History Agriculture -- Research -- South Dakota -- History Agronomy -- Research -- South Dakota -- History Plant diseases -- Research -- South Dakota -- History Entomology -- Research -- South Dakota -- History Agriculturists -- South Dakota -- Biography Botanists -- South Dakota -- Biography

Report No 42 - A Guide To The Gazetted Rare Flora Of Western Australia, Barbara L. Rye, Stephen D. Hopper

Fisheries Research Reports

Descriptions and illustrations are provided for the first 100 taxa which have been gazetted as rare, likely to become extinct or in need of special protection under the Wildlife Conservation Act 1950-1979. Most of these rare taxa are restricted to the South-West Botanical Province and more than one-third occur in the Albany Wildlife District.

An outline is given of the means adopted to determine which taxa are gazetted as rare, the legal provisions for their protection and the biological data being sought for their management.

Fisheries Report No 45 - The Short Term Effects Of Brush Harvesting On The Kwongan Vegetation At Eneabba, Western Australia, E. A. Griffin, A. J. M. Hopkins

Fisheries Research Reports

Areas of the kwongan vegetation south of Eneabba are currently being harvested to provide brush for rehabilitation after mining. Because of the botanical importance of the Eneabba kwongan, a study of the effects of the harvesting was initiated. Three areas with different harvest histories were sampled using quadrats paired across cut/uncut boundaries. Floristic and structural differences between quadrats and between areas were assessed. The store of seed in uncut vegetation was measured.

There was a loss of species as a result of harvesting, at least in the short-term. Many species regenerated by resprouting from buds in damaged stems or in …

Ua35/11 Student Honors Research Bulletin, Wku Honors Program

WKU Administration Documents

The WKU Student Honors Research Bulletin is dedicated to scholarly involvement and student research. These papers are representative of work done by students from throughout the university.

• Condis, Rebecca. Reconstituted Families: Counseling Concepts and Application
• Miller, Brad. Does Congress Effectively Regulate the Ethics of its Members?
• Grizzle, Dennis. Electron Microscopy of Polytrichum Moss Spores
• Collins, Lynell. Transformational Effects on Cytoskeleton and Cell-Surface Antigens
• Hamilton, Joy. A Summary of Flaws in Thomas Hardy's Far From the Madding Crowd
• Martin, Lanna. Sadie F. Price: Artist, Botanist, Author and Naturalist
• Wood, Irene. The Imagery of Smoke, Fire and Ash: A Study of the …

Bibliographie Pflanzensoziologischer Arbeiten Über Die Mongolische Volksrepublik, Werner Hilbig

Erforschung biologischer Ressourcen der Mongolei / Exploration into the Biological Resources of Mongolia, ISSN 0440-1298

Zusammenfassung

Die Bibliographie enthält pflanzensoziologische und vegetationsökologische Veröffentlichungen aus dem Gebiet der Mongolischen Volksrepublik (MVR) von den zwanziger Jahren bis zum Jahre 1979. Es werden 217 Arbeiten zitiert. Der Großteil dieser Publikationen stammt aus der Feder sowjetischer Geobotaniker,

Experimental Summaries., M W. Perry, R N. Weir

Experimental Summaries - Plant Research

Wheat Yield Potential Trials, 81BA4, 81WH7, 81KAS.Wheat-Regenerating Sandplain Lupin Rotation Trials, 79GE38, 79GE42.Nitrogen x Cycocel x Foliar Nutrients x Fungicide-on Wheat,81KA6. Historical Wheat Trials, 81A3, 81C4, 81SG22, 81WH6. Time of Planting on Cereal Yields, 81NA8, 81KA55.

Ord River Irrigation Area - Potential For A Sugar Cane Industry In Western Australia, Department Of Agriculture, Western Australia

Farm Systems and Economics published reports

The Ord River Irrigation Area is in the Kimberley Region of Western Australia, 3,200 kms from Perth, the State’s Capital City.

The area is located in the arid tropics with a climate suitable for high plant growth rates provided water supply is adequate.

With only 12,000 ha of land developed out of a potential 72,000 ha of clay soils the area has the potential for further development of a major irrigated agricultural enterprise.

The Ord River Irrigation Project has been developed for commercial agriculture following the construction of a diversion dam in 1963, and a major dam in 1974, The …