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Regulation Of Phytochrome Gene Expression, J. T. Colbert, S. A. Costigan, P. Avissar, Z. Zhao

Journal of the Iowa Academy of Science: JIAS

In etiolated oat seedlings exposure to red light results in a decrease in the transcription of the phytochrome genes, the abundance of phytochrome mRNA, and the level of phytochrome protein. Phytochrome itself serves as the photoreceptor for the response of decreased mRNA and transcription levels. The decrease in phytochrome mRNA is sensitive to low levels of Pfr. Even green "safelight" is capable of inducing a decrease in phytochrome mRNA abundance. Barley phytochrome mRNA abundance is also dramatically down-regulated in response to red light but other plant species vary in their ability to decrease phytochrome mRNA abundance after red light treatment. …

The Axr1 Mutation Of Arabidopsis Is Expressed 10 Booth Roots And Shoots, Cythia Lincoln, Mark Estelle

Journal of the Iowa Academy of Science: JIAS

In order to identify genes involved in auxin action we have isolated a number of mutants of Arabidopsis thaliana which are resistant co exogenous application of either indole-3-acetic acid or 2, 4-dichlorophenoxyacecic acid. One of the genes identified in chis way is the Axr1 gene. Recessive mutations in this gene confer resistance co auxin as well as a number of morphological defects. In this report we describe the isolation of at least two new axr1 alleles. In addition, we show that the axr1 mutation affects gravitropic growth of the root, auxin-induced ethylene biosynthesis and growth in tissue culture. Our results …

Part Ii - Regular Issue

Journal of the Iowa Academy of Science: JIAS

No abstract provided.

Results Of The August Roadside Survey For Upland Wildlife In Iowa: 1963-1988, Willie J. Suchy, Ronald J. Munkel, James M. Kienzler

Journal of the Iowa Academy of Science: JIAS

Results of the August roadside survey collected from 1963 through 1988 were examined to determine if trends could be detected in the counts of ring-necked pheasants (Phasianus colchicus), northern bobwhite (Colinus virginianus), gray partridge (Perdix perdix), cottontail rabbits (Sylvilagus floridanus), and white-tailed jackrabbits (Lepus townsendii). The counts also were compared to harvest estimates co determine if correlations exist. Statistically significant linear trends were detected statewide for pheasants, gray partridge and jackrabbits during the 1963 co 1988 period. Trends were downward for all species except gray partridge. During the late 12 years (1977 through 1988), the only significant trend detected was …

The Role Of Mechanical Injury In An Experimental Transmission Of Flexibacter Columnaris To Fingerling Walleye, Manzoor Hussain, Robert C. Summerfelt

Journal of the Iowa Academy of Science: JIAS

The role of mechanical injury in transmission of Flexibacter columnaris to walleye fingerlings (Stizostedion vitreum vitreum) was investigated. Two groups (1 and 2) of 10 fish each, 7 to 9 cm total length, were exposed to a suspension of F lexibacter columnaris containing 3 X 105 cfu/ mL; fish in group 1 were injured with a scratch along their flank; fish in group 2 were not injured. Two control groups (3 and 4) of 5 fish each were exposed to a sterile broth; group 3 was injured with a scratch and group 4 was not. In 72 h, morbidity was …

Front Matter

Journal of the Iowa Academy of Science: JIAS

No abstract provided.

Middle Woodland Field Camps In The Cedar Valley, Michael J. Perry

Journal of the Iowa Academy of Science: JIAS

Archaeological survey and testing of two proposed road projects within the Cedar River valley resulted in the location of several prehistoric occupational sites. Ceramics recovered at three of the sites, 13LN226, 13LN236, and 13LN243, are identified as late Middle Woodland period specimens, dating to ca. A.D. 200. The three sites border Cedar River tributaries, occupying high terrace formations within the broad bottomlands of the Cedar valley. The type and distribution of artifacts suggest that 13LN236 and 13LN243 functioned as repeatedly utilized, short-term extractive and processing camps. Previous research at sites of similar age focused on small, protected rockshelters and large, …

A Study Of Sphacelotheca Occidentalis, Cause Of Kernel Smut Of Big Bluestem, Karen M. Snetselaar, Lois H. Tiffany

Journal of the Iowa Academy of Science: JIAS

Sphacelotheca occidentalis causes kernel smut disease of Andropogon gerardii, a prairie grass. The smut fungus is systemic, perennial, causes severe stunting, and sporulates in florets. Spores develop in gall-like sari composed of grass and fungal cells. Spores initiate in a meristematic area near the base of the sorus, and progressively more mature spores are found toward the sorus rip. The cylindrical sari have a central columella of host vascular tissue permeated by hyphae, sporogenous hyphae and developing teliospores that surround the columella, and a peridium of host and fungal cells. Sporogenous hyphae ramify in a gelatinous matrix that disappears as …

Editorial Board & Iowa Academy Of Science Officers And Directors

Journal of the Iowa Academy of Science: JIAS

No abstract provided.

Back Cover

Journal of the Iowa Academy of Science: JIAS

No abstract provided.

Cover - Table Of Contents

Journal of the Iowa Academy of Science: JIAS

No abstract provided.

Iowa's Climate As Projected By The Global Climate Model Of The Goddard Institute For Space Studies For A Doubling Of Atmospheric Carbon Dioxide, E. S. Takle, S. Zhong

Journal of the Iowa Academy of Science: JIAS

Results of a global climate model that simulates climate under a doubling of atmospheric carbon dioxide (estimated to occur by the latter half of the twenty first century) have been interpolated to Iowa. Summer temperatures under such a doubling are projected to rise by 4 to 7°F (2.2 to 3.9°C) and winter temperatures by 10 to 11° (5.6 to 6.1°C). Estimates of space heating and cooling demands from these data suggest a 30 to 35% decrease in space heat demand and a 200 to 300% increase in space cooling demand. Temperature variability is projected to decrease. Precipitation estimates from global …

Comparison Of Dinitrogen Fixation And Nitrogen Transfer Potentials Of Four Red Clover Cultivars, D. E. Farnham, A. P. Mallarino, W. F. Wedin, I. T. Carlson

Journal of the Iowa Academy of Science: JIAS

The capacity to fix atmospheric N₂ and thus reduce the use of N fertilizer is an important reason for including legumes in forage mixtures. Selection for more efficient N₂ fixation could improve red clover (Trifolium prateme L.) (RC) production and its contribution to soil fertility. An isotope dilution study was conducted in two greenhouse experiments to compare the N₂ fixation and N transfer potentials of three commercial and one experimental RC cultivars. The experimental cultivar APR-8701 was selected for traits related to increased N₂ fixation (rate of acetylene reduction, root size and branch number, and nodule …

Studies Of The Precambrian Geology Of Iowa: Part 1. The Otter Creek Layered Igneous Complex, Kenneth E. Windom, Karl E. Seifert, Raymond R. Anderson

Journal of the Iowa Academy of Science: JIAS

Rocks from a buried igneous body, herein called the Otter Creek layered igneous complex, were recovered by drilling in Archean rocks in northwestern Iowa. This complex consists of layers of ultramafic and mafic cumulate rocks, including bronzitite, harzburgite, dunite, gabbro, and anorthosite. These rocks have been subjected to low-grade metamorphism with a patagenesis including serpentine, chlorite, talc, uralitic amphiboles, magnetite, albite, epidote, sericite, and minor quartz and calcite. During its intrusion, the magma which gave rise to the layered body engulfed a large block of rock consisting of banded iron formation and thin lamprophyre dikes. Both the iron formation and …

Annual Report Of The Iowa Academy Of Science, 1990-91, Paul E. Rider

Journal of the Iowa Academy of Science: JIAS

Starting in 1976, annual reports have served as a continuing record of the activities of the Iowa Academy of Science. These augment a 100 year history of the Academy which was written in the centennial year of 1975.

This report covers the period from July 1, 1990 to June 30, 1991. It is based on the official records of the Academy (committee reports, Board minutes, correspondence) as well as the recollections, impressions and musings of the author.

An Annotated Checklist Of The Vascular Plant Flora Of Guthrie County, Iowa, Dean M. Roosa, Lawrence J. Eilers, Scott Zager

Journal of the Iowa Academy of Science: JIAS

The known vascular plant flora of Guthrie County, Iowa, based on field, herbarium, and literature studies, consists of 748 taxa (species, varieties, and hybrids), 135 of which are naturalized. Species which appear on the state's list of endangered and threatened species, or are otherwise rare, are discussed.

There is an affinity of the plants of Guthrie County with those of the Ozark plateau, and with specialized habitats providing extensions of ranges for species normally found farther north or east.

Vascular Flora Of Arend's Kettle, Freda Haffner Kettlehole State Preserve, Dickinson County, Iowa, Edwin L. Freese, William J. Platt

Journal of the Iowa Academy of Science: JIAS

Arend's Kettle is a 5 ha glacial landform in Dickinson County, Iowa. The flora of this kettle was studied over two years prior to acquisition by the Nature Conservancy in 1973. The known vascular flora of Arend's Kettle as of 1973 consisted of 299 species, representing 177 genera and 59 families. The vegetation ranged from xeric short grass prairie along the rims of the kettle to mesic prairie along the middle and lower slopes. In the bottom of the kettle, there was a marsh/seasonal pond community that varied greatly in the amount of water present, depending on rainfall within the …

Electrophoretic Study Of Enzymes From A Glossina Fuscipes Fuscipes Newstead Population From Western Kenya, G. F. Rajendram

All Peer-Reviewed Publications

Enzymes were investigated, by electrophoresis, in a population of Glossina fuscipes fuscipes Newstead collected from Rusinga Island in Lake Victoria, Western Kenya. The following enzymes were tested: glucose phosphate isomerase. glucose-6-phosphate dehydrogenase (G6PDH). hexokinase, isocitrate dehydrogenase (IDH), malate-dehydrogenase (MDH), phosphoglucomutase, and xanthine dehydrogenase (XDH). Single monomorphic bands were stained by the following enzymes apparently under the control of single loci: G6PDIL MDH, and XDH. The enzyme IDH showed two bands with very close mobilities and no variation among individuals in the population. Hence IDH was considered as representing a single locus. Glucose phosphate isomerase manifested three alleles and apparently six …

Trap-Catches, Nutritional Condition And The Timing Of Activity Of The Tsetse Fly Glossina Longipennis (Diptera: Glossinidae), Sarah E. Randolph, D. J. Rogers, R. D. Dransfield, R. Brightwell

All Peer-Reviewed Publications

Samples of Glossina longipennis Corti, taken over four days in traps (baited with acetone, cow urine and octenol) at half-hourly intervals during their restricted activity periods at dusk and dawn, were analysed for their nutritional condition. For both sexes, trap catches were highest at the end of dusk, between 19.00 and 19.30 h, associated with a significant increase in numbers with the low haematin content characteristic of flies estimated to have fed more than 60 hours previously. Also, the mean fat content of these flies was significantly lower than that of those trapped earlier. There was considerable day-to-day variation in …

Transactions Of The Nebraska Academy Of Sciences Volume Xviii (1990-91): Table Of Contents

Transactions of the Nebraska Academy of Sciences and Affiliated Societies

Editorial Contents

Nebraska Academy of Sciences Officers, Policy Committee .......... ii

Editorial Board .......... v

Membership Objectives and Friends of the Academy .......... vi

Earth Sciences

Ditching of wetlands in the Nebraska Sandhills: A case study of Grant County (James E. Ducey) .......... 1

Cross-sectional analyses of sediment and organic matter from transects across the lower unchannelized Missouri River (Larry W. Hesse and Gerald E. Mestl) .......... 11

Fossil herpetofauna of the Lisco C quarries (Pliocene: Early Blancan) of Nebraska (J. Alan Holman and M. Elise Schloeder) .......... 19

Fission-track ages of zircons from Lonergan Creek (Shoreline Fossil Locality, Ash …

Potential Impacts Of Biomass Production In The United States On Biological Diversity, James H. Cook, Jan Beyea, Kathleen H. Keeler

School of Biological Sciences: Faculty Publications

Biomass could be a renewable source of energy and chemicals that would not add CO₂ to the atmosphere. It will become economically competitive as its cost decreases relative to energy costs, and biotechnology is expected to accelerate this trend by increasing biomass productivity. Pressure to slow global warming may also make biomass more attractive. Substantial dependence on biomass would entail massive changes in land use, risking serious reductions in biodiversity through destruction of habitat for native species. Forests could be managed and harvested more intensively, and virtually all arable land unsuitable for high-value agriculture or silviculture might be used …

Dietary And Parasitological Analysis Of Coprolites Recovered From Mummy 5, Ventana Cave, Arizona, Karl Reinhard, Richard H. Hevly

Karl Reinhard Publications

Four coprolites were excavated with Burial 5 at Ventana Cave. a partially mummified five-year-old child. Two coprolites were granular and dark in color and two were fibrous and light in color. The coprolites are remains of the child's intestinal contents and were submitted for dietary and parasitological analysis. No parasites were found. The fibrous coprolites proved to be remains of highly masticated mesquite pods (Prosopis). The granular coprolites consist of seeds of saguaro cactus (Carnegiea gigantea). Pollen analysis reveals two dietary pollen types, both derived from cactus. No evidence of cultivated plants except for a trace amount of …

Mark Merlin's Review Of John L. Culliney's Islands In A Far Sea: Nature And Man In Hawaii., Mark Merlin

Pacific Studies

No abstract provided.

The Role Of Market Transfers In The Accommodation Of New Uses: A Case Study Of The Truckee-Carson Basin, A. Dan Tarlock

Moving the West's Water to New Uses: Winners and Losers (Summer Conference, June 6-8)

31 pages (includes 1 map).

National Wildlife Refuges - A Cruel Hoax

Close Up Reports

No abstract provided.

Human Hair Morphology: A Scanning Electron Microscopy Study On A Male Caucasoid And A Computerized Classification Of Regional Differences, W. M. Hess, R. E. Seegmiller, J. S. Gardner, J. V. Allen, Susan Barendregt

Scanning Microscopy

The present study was performed to provide a better understanding of the morphological variations of mammalian hair. Terminal hair samples were obtained from different regions of the body of the same Caucasian male. All hair samples were either cleaned or treated before being examined with scanning electron microscopy. As human scalp hair grew it appeared small like lanugo hair, but the increase in diameter appeared to have been relatively rapid. As hair increased in diameter the appearance of the scales changed. Neck hair was slightly smaller in diameter than scalp hair, and axillary hair was slightly smaller in diameter than …

Crisis In The Oceans

Close Up Reports

No abstract provided.

The Annual Meeting Of The Iowa Academy Of Science April 20-21, 1990 [Program, 102nd Meeting], Iowa Academy Of Science

Iowa Academy of Science Documents

Contents:

Program Summary --- 5
General Session Speakers --- 9
Awards --- 12
Distinguished Fellow --- 12
Distinguished Service --- 13, 14
Symposia Programs --- 15
Poster Session --- 17
Campus Map --- Centerfold
Section Programs --- 22
Agricultural Sciences --- 22
Anthropology --- 25
Botany --- 26
Cellular & Molecular Biology --- 28
Chemistry, Inorganic --- 30
Chemistry, Organic --- 34
Conservation --- 37
Earth Science Teaching --- 39
Elementary Science Teaching --- 40
Engineering --- 42
Geology --- 47
Linguistics --- 48
Nursing --- 49
Physics --- 50
Physiology --- 53
Psychology --- 54
Science Teaching --- 56 …

'Eve' In Africa: Human Evolution Meets Molecular Biology, Robert D. Seager

Faculty Work

Recent advances in the study of human origins have increased our understanding of our ancestors. There have been new, major fossil finds. WT 17000, a 2.5 million-year-old robust Australopithecus found in Kenya (Walker et al. 1986), led to a revision of early hominid phylogeny (Delson 1986; 1987). Existing fossil materials have been reassessed. For example, Tattersall (1986) maintains that at least two unrecog­- nized hominid species (Homo neanderthalensis, H. hei­ delbergensis and possibly H. steinheimensis ) existed be­ tween the times of H . erectus and fully modern H . sapiens.

Vol. 13 No. 2 (1990): Pacific Studies Full Issue, The Jonathan Nāpela Center For Hawaiian And Pacific Islands Studies

Pacific Studies

Pacific Studies is published two times a year by The Jonathan Nāpela Center for Hawaiian and Pacific Studies, Brigham Young University Hawai‘i #1979, 55–220 Kulanui Street, Lāʻie, Hawai‘i 96762, but responsibility for opinions expressed in the articles rests with the authors alone. Subscription rate is US$40.00 yearly, payable to The Jonathan Nāpela Center for Hawaiian and Pacific Studies. The Jonathan Nāpela Center for Hawaiian and Pacific Studies (formerly The Pacific Institute) is an organization funded by Brigham Young University Hawai‘i. The Center assists the University in meeting its cultural and educational goals by undertaking a program of teaching, research, and …