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Articles 1561 - 1590 of 1801
Full-Text Articles in Botany
Introduction From The Changing Prairie: North American Grasslands, Anthony Joern, Kathleen H. Keeler
Introduction From The Changing Prairie: North American Grasslands, Anthony Joern, Kathleen H. Keeler
School of Biological Sciences: Faculty Publications
Preserving remaining North American grasslands requires a multiability approach. In this book, we investigate three aspects of an admittedly larger problem: (1) how we as humans perceive grasslands; (2) the ecology of grasslands, in order to define the framework within which conservation and preservation efforts must operate; and (3) conservation issues. Additional sociological, economic, philosophical, and cultural considerations will provide important additional insights to preserving and managing grasslands, but are not included here. By restricting our focus to only three issues, we feel that we can provide a basic, but appropriate, understanding of grassland ecosystems for the prairie enthusiast. This …
Population Processes, Kathleen H. Keeler, Anthony Joern
Population Processes, Kathleen H. Keeler, Anthony Joern
School of Biological Sciences: Faculty Publications
Within the prairies, myriad populations of plants, insects, small mammals, and other organisms form distinct levels of organization. The physical forces of weather and fire and the complex networks of species interactions control each species’s structure and dynamics and determine its abundance or rarity. Variation in population dynamics and interactions over time and space determine the distribution and abundance of species, and ultimately the composition and dynamics of entire prairie communities.
To the casual observer, plant populations on prairies may seem quite static, like museums containing a diverse collection of specimens that can be seen again and again on repeated …
Preface From The Changing Prairie: North American Grasslands, Kathleen H. Keeler, Anthony Joern
Preface From The Changing Prairie: North American Grasslands, Kathleen H. Keeler, Anthony Joern
School of Biological Sciences: Faculty Publications
North American grasslands have figured prominently in our North American heritage. Prairies first provided significant barriers to westward expansion, and then offered both economic and sociological opportunity, as well as heartache, for settlers. Many artists have gained significant inspiration from the beauty as well as the harshness of this region and its biota. And because of ideal climate and soil conditions, these grasslands have provided the agricultural foundation of which much of the economic growth and stability of the United States has historically depended.
Yet many see North American prairies as beautiful only when manipulated or exploited: Green croplands or …
The Prairie Naturalist Volume 26, No. 4. December 1994
The Prairie Naturalist Volume 26, No. 4. December 1994
The Prairie Naturalist
REPRODUCTION OF RING-NECKED PHEASANTS IN IOWA ▪ T Z. Riley, J. B. Wooley, Jr. , and W. B. Rybarczyk
DIETARY COMPARISONS OF ADULT MALE COMMON GRACKLES, RED-WINGED BLACKBIRDS, AND YELLOW-HEADED BLACKBIRDS IN NORTH CENTRAL NORTH DAKOTA ▪ H. J. Homan, GM. Linz, W. J. Bleier, and R. B. Carlson
ECOGEOGRAPHY OF SOUTHERN BOG LEMMING AND MEADOW VOLE IN NORTH CENTRAL KANSAS ▪ T. L. Welker and J. R. Choate
SUMMER AND FALL FOOD HABITS OF COYOTES IN SOUTHWESTERN NORTH DAKOTA ▪ T. L. Lewis, W. F. Jensen, K. A. Keehr, and R. W. Seabloom
MOVEMENT PATTERNS OF WHITE-TAILED DEER AT …
The Prairie Naturalist Volume 26. No. 3. September 1994
The Prairie Naturalist Volume 26. No. 3. September 1994
The Prairie Naturalist
BREEDING RANGE AND POPULATION STATUS OF LESSER PRAIRIE-CHICKENS IN COLORADO ▪ K. M. Giesen
LESSER PRAIRIE-CHICKEN MOVEMENTS AND HOME RANGES IN NEW MEXICO ▪ T. Z. Riley, C. A. Davis, M. A. Candelaria, and H. R. Suminski
WATERFOWL PRODUCTIVITY AND USE OF NESTING STRUCTURES IN THE PRAIRIE POTHOLE REGION ▪ R. R. Johnson, K. F. Higgins, I. J. Ball. and S. C. Kohn
A COMPARISON OF PERCH USE BY VOCALIZING EASTERN AND WESTERN MEADOWLARKS ▪ K. A. Kinstler and T. A. Sordahl
FARM OPERATOR ATTITUDES TOWARD WHITE-TAILED DEER AT SAND LAKE NATIONAL WILDLIFE REFUGE, SOUTH DAKOTA ▪ D. E. Naugle. …
The Prairie Naturalist Volume 26, No. 2. June 1994
The Prairie Naturalist Volume 26, No. 2. June 1994
The Prairie Naturalist
EARLY HISTORY OF THE NORTH DAKOTA NATURAL SCIENCE SOCIETY ▪ J. T. Lokemoen
TEMPORAL VARIATION IN COYOTE PREY IN TALLGRASS PRAIRIE OF EASTERN KANSAS ▪ D. E. Brillhart and D. W. Kaufman
DIFFERENCES IN USE OF INTERSPERSED WOODLAND AND GRASSLAND BY SMALL MAMMALS IN NORTHEASTERN KANSAS ▪ B. R. McMillan and D. W. Kaufman
THE CIRCANNUAL MASS CYCLE IN THREE POPULATIONS OF THIRTEEN-LINED GROUND SQUIRREL ▪ G. Y. Walker, O. A. Schwartz, and J. E. Joy
SUMMER ELK TRAPPING IN SOUTH DAKOTA ▪ J. J. Millspaugh, G. C. Brundige, and J. J. Jenks
OUT-OF-SEASON BIRTHS OF ELK CALVES IN WYOMING …
The Prairie Naturalist Volume 26. No. 1. March 1994
The Prairie Naturalist Volume 26. No. 1. March 1994
The Prairie Naturalist
FISH CATCHES WITH HOOP NETS OF TWO DESIGNS IN THE LARAMIE RIVER, WYOMING ▪ W. A. Hubert and T. M. Patton
LENGTH DISTRIBUTIONS OF NORTHERN PIKE CAUGHT IN FIVE GILL NET MESH SIZES ▪ R. M. Neumann and D. W. Willis
EVALUATION OF LARGEMOUTH BASS SLOT LENGTH LIMITS IN TWO SMALL SOUTH DAKOTA IMPOUNDMENTS ▪ R. M. Neumann, D. W. Willis, and D. D. Mann
POSSIBLE PREDATION OF A FORSTER'S TERN CHICK BY A SNAPPING TURTLE ▪ G. Fraser
SMALL MAMMAL DIVERSITY AND ABUNDANCES IN THREE CENTRAL IOWA GRASSLAND HABITAT TYPES ▪ L. A. Hayslett and B. J. Danielson
SMALL …
Wild Medicine: Review Of Medicinal Wild Plants Of The Prairie By Kelly Kindscher, Kathleen H. Keeler
Wild Medicine: Review Of Medicinal Wild Plants Of The Prairie By Kelly Kindscher, Kathleen H. Keeler
School of Biological Sciences: Faculty Publications
I am highly enthusiastic about this book as a reference work. It summarizes the literature on the medicinal uses for more than 103 prairie plants. For 43 species, Kindscher gives common, Indian, and scientific names; description; habitat; parts used; Indian uses; medical history; scientific research and cultivation; and information on about 100 of their relatives. Another 60 entries are condensed to 24 paragraphs. Full-page line drawings by William S. Whitney of the major species are generally excellent, and all 103 entries have distribution maps. The introduction discusses the region covered, with helpful maps. There's an index, a glossary and a …
Diversity Of Vascular Plants And Intensity Of Plant Collecting In Nebraska, Robert B. Kaul, Steven B. Rolfsmeier
Diversity Of Vascular Plants And Intensity Of Plant Collecting In Nebraska, Robert B. Kaul, Steven B. Rolfsmeier
Transactions of the Nebraska Academy of Sciences and Affiliated Societies
A computerized database of Nebraska's flora has been made from specimens in 20 herbaria. Almost 1,900 species of native and escaped-alien vascular plants have been collected in the state since the mid-1800s. The flora of some counties is very well known but that of many counties, especially southwestern and Sandhills counties, is poorly collected. More than 800 species (nearly 100% of the species that are likely to occur) have been collected from each of Cherry, Douglas, Lancaster, and Richardson counties, but fewer than 150 species are known from Fillmore and McPherson counties, less than 25% of the potential number species …
Purification Of The Major Soybean Leaf Acid Phosphatase That 1s Increased By Seed-Pod Removal, Paul E. Staswick, Chuck Papa, Jing-Feng Huang, Yoon Rhee
Purification Of The Major Soybean Leaf Acid Phosphatase That 1s Increased By Seed-Pod Removal, Paul E. Staswick, Chuck Papa, Jing-Feng Huang, Yoon Rhee
Department of Agronomy and Horticulture: Faculty Publications
Fruit removal for 5 weeks after flowering increased acid phosphatase activity 10-fold in soybean (Glycine max 1. Merr. vai Hobbit) leaves compared with normal seed-pod-bearing plants. The major acid phosphatase activity in leaves was purified over 2700-fold, yielding a single polypeptide of 51 kD with a specific activity of 1353 units/mg protein using p-nitrophenylphosphate as the substrate. lsoelectric focusing demonstrated that the purified protein co-migrated with a majority of the activity that increased in leaves following seed-pod removal. lmmunoblot analysis demonstrated that at least part of the increased activity was dueto an increased abundance of the phosphatase protein. In situ …
Cdna Sequence For The Ribulose 1,5 Bisphosphate Carboxylase/Oxygenase Complex Protein A Protein That Accumulates In Soybean Leaves In Response To Fruit Removal, Paul E. Staswick, Steven J. Crafts-Brandner
Cdna Sequence For The Ribulose 1,5 Bisphosphate Carboxylase/Oxygenase Complex Protein A Protein That Accumulates In Soybean Leaves In Response To Fruit Removal, Paul E. Staswick, Steven J. Crafts-Brandner
Department of Agronomy and Horticulture: Faculty Publications
Soybean (Glycine max L.) transiently accumulates two abundant vegetative storage proteins, VSP A and VSP B, in vacuoles of above-ground vegetative tissues (Wittenbach, 1983; Staswick, 1990). As older leaves and stems become a source of exported metabolites for developing sinks, the VSPs are preferentially degraded and the resulting metabolites are presumably mobilized in the xylem and phloem stream. A striking feature of these proteins is that VSP gene expression is dramatically increased in mature leaves following the remova1 of reproductive sinks (seed pods) and the amount of these proteins increases accordingly (for review, see Staswick, 1994). Other changes …
Models To Predict Yield Loss Due To Weeds In Rice Ecosystems, John L. Lindquist
Models To Predict Yield Loss Due To Weeds In Rice Ecosystems, John L. Lindquist
Department of Agronomy and Horticulture: Faculty Publications
Yield loss models have been developed and evaluated for irrigated rice ecosystems with respect to effects of Echinochloa crusgalli. Simple regression models that give the relation between yield loss and weed density or relative leaf area are discussed with respect to their practical value in weed management in rice. More complex eco-physiological process models have been developed and used for rice ecosystems as well. Such models can be useful as a tool in research, whereas more simple approaches are needed for practical application in weed management.
The Prairie Naturalist Volume 25. No. 4. December 1993
The Prairie Naturalist Volume 25. No. 4. December 1993
The Prairie Naturalist
Paul B. Kannowski, Editor
Nikki R. Seabloom, Assistant Editor
Douglas H. Johnson, Book Review Editor
CONTENTS
FACTORS INFLUENCING DEER/VEHICLE MORTALITY IN EAST CENTRAL SOUTH DAKOTA ▪ J. S. Gleason and J. A. Jenks
PRONGHORN SKULL FOUND ALONG EDGE OF HISTORIC EASTERN DISTRIBUTION IN NORTH DAKOTA ▪ W. F. Jensen and R. W. Seabloom
SOREX MERRIAMI IN NEBRASKA ▪ P. W. Freeman, J. D. Druecker, and S. Tvrz
ARE DEER MICE A COMMON PREY OF COYOTES? ▪ G. A. Kaufman, D. E. Brillhart, and D. W. Kaufman
EFFECT OF PRAIRIE-FIRE ASH ON FOOD CHOICE BY DEER MICE AND HISPID COTTON RATS …
The Prairie Naturalist Volume 25, No. 3 September 1993
The Prairie Naturalist Volume 25, No. 3 September 1993
The Prairie Naturalist
Paul B. Kannowski, Editor
Nikki R. Seabloom, Assistant Editor
Douglas H. Johnson, Book Review Editor
CONTENTS
AVAILABILITY OF EARTHWORMS AND SCARAB BEETLES TO SANDHILL CRANES IN NATIVE GRASSLANDS ALONG THE PLATTE RIVER ▪ C. A. Davis and P. A. Vohs
BLACK TERN COLONIZATION OF A RESTORED PRAIRIE WETLAND IN NORTHWESTERN MINNESOTA ▪ D. J. Delehanty and W. D. Svedarsky
MOUNTAIN PLOVER HABITAT SELECTION IN THE POWDER RIVER BASIN, WYOMING ▪ T. L. Parrish, S. R. Anderson, and W. F. Oelklaus
POST-HATCH BROOD AMALGAMATION IN LESSER SCAUP: FEMALE BEHAVIOR AND RETURN RATES AND DUCKLING SURVIVAL ▪ A. D. Afton
STATUS AND …
The Prairie Naturalist Volume 25. No. 2. June 1993
The Prairie Naturalist Volume 25. No. 2. June 1993
The Prairie Naturalist
Paul B. Kannowski, Editor
Nikki R. Seabloom, Assistant Editor
Douglas H. Johnson, Book Review Editor
CONTENTS
RAPID GROWTH OF CHANNEL CATFISH IN FLAMING GORGE RESERVOIR, WYOMING ▪ C. B. Alexander and W. A. Hubert
MANAGEMENT EVALUATION OF BODY CONDITION AND POPULATION SIZE STRUCTURE FOR PADDLEFISH: A UNIQUE CASE ▪ M L. Brown and B. R. Murphy
DISTRIBUTION OF THE RIBBON LEECH IN NORTH DAKOTA ▪ C. M. Pennuto and M. G. Butler
SELENIUM IN EARED GREBE EMBRYOS FROM STEWART LAKE NATIONAL WILDLIFE REFUGE, NORTH DAKOTA ▪ M. M. Olson and D. Welsh
USING GEOGRAPHIC VARIATION TO PREDICT BREEDING LOCALES OF …
The Prairie Naturalist Volume 25. No. 1. March 1993
The Prairie Naturalist Volume 25. No. 1. March 1993
The Prairie Naturalist
Paul B. Kannowski, Editor
Nikki R. Seabloom, Assistant Editor
Douglas H. Johnson, Book Review Editor
CONTENTS
FACTORS AFFECTING BIRD COLONIZATION OF RESTORED WETLANDS ▪ L. M. Hemesath and J. J. Dinsmore
RESPONSE OF DABBLING DUCKS TO EARLY-SPRING PARTIAL DRAWDOWN ON LAKE ERIE MARSHES ▪ T. Z. Riley and T. A. Bookhout
OVER-WATER NESTING BY DUCKS IN NORTHEASTERN SOUTH DAKOTA ▪ . K. L. Solberg and K. F. Higgins
ADDITIONAL MOUNTAIN PLOVER SIGHTINGS IN MONTANA ▪ D. M. Prellwitz
SMALL MAMMALS OF WOODED HABITATS OF THE KONZA PRAIRIE RESEARCH NATURAL AREA, KANSAS ▪ D. W. Kaufman, G. A. Kaufman, and E. …
Developmental Morphology Of Tropical Sorghum And Sorghum X Sudangrass, R. B. Mitchell, K. J. Moore, Jeffrey F. Pedersen, T. A. Peterson, L. E. Moser, D. D. Redfearn
Developmental Morphology Of Tropical Sorghum And Sorghum X Sudangrass, R. B. Mitchell, K. J. Moore, Jeffrey F. Pedersen, T. A. Peterson, L. E. Moser, D. D. Redfearn
Department of Agronomy and Horticulture: Faculty Publications
Tropical sorghum and sorghum x sudangrass are known to be efficient scavengers of soil nitrogen and are important forage crops in the U.S. Nitrate contamination of groundwater due to disposal of organic wastes and excessive fertilization is a major concern in the Central Great Plains. A common disposal method of municipal wastes is application to fallow cropland. Quantification of the developmental morphology of tropical sorghum and sorghum x sudangrass is important to developing management strategies that allow multiple applications of organic wastes to optimize nitrogen removal and dry matter production. The objective of this study was to quantify the developmental …
Genetic Manipulation Of Tall Fescue, Jeffrey F. Pedersen, D. A. Sleper
Genetic Manipulation Of Tall Fescue, Jeffrey F. Pedersen, D. A. Sleper
Department of Agronomy and Horticulture: Faculty Publications
Genetic manipulation of tall fescue (Festuca arnndinacea Schreb.) has not been altered by the discovery of the Acremonium coenophialum (Morgan-Jones and Gams) / grass interaction. However, tall fescue breeding programs have been affected greatly. The basic methods for genetically manipulating the grass have remained static. Tall fescue is an obligate out-crossing species, and most improvements are, therefore, captured in the form of an improved population developed through some form of mass or recurrent selection. What has changed is the breeder's ability to recognize genetic differences in the grass because of the confounding effect of A. coenophialum on plant phenotype. It …
Comparison Of Sorghum And Indiangrass Chloroplast Genomes Using Rflps, Jeffrey F. Pedersen, R. D. Lee, D. J. Lee, K. P. Vogel
Comparison Of Sorghum And Indiangrass Chloroplast Genomes Using Rflps, Jeffrey F. Pedersen, R. D. Lee, D. J. Lee, K. P. Vogel
Department of Agronomy and Horticulture: Faculty Publications
Sorghum (Sorghum bicolor (L.) Moench) and indiangrass (Sorghastrum nutans (L.) Nash) appear closely related based on morphological and chemotaxonomic characters. Each species could potentially provide desirable traits to the other. However, traditional breeding techniques have been unsuccessful in hybridizing these two species. The objective of this study was to determine the relatedness of sorghum and indiangrass chloroplast DNA using RFLPs. Eleven sorghum lines in several cytoplasms, two indiangrass popu1ations, and a corn line were studied using 60 proberestriction enzyme combinations. Principal component analysis of the results showed sorghum to be as closely related to corn as to indiangrass, with no …
Breeding Systems For Cross-Pollinated Perennial Grasses, K. P. Vogel, Jeffrey F. Pedersen
Breeding Systems For Cross-Pollinated Perennial Grasses, K. P. Vogel, Jeffrey F. Pedersen
Department of Agronomy and Horticulture: Faculty Publications
I. Introduction
II. Reproductive and Breeding Characteristics
III. Breeding Systems
A. Ecotype Selection
B. Recurrent, RestricteclPhenotypic Selection
C. Half-sib Progeny Test
D. Between and Within Family Selection
E. Recurrent Multistep Family Selection
IV. Gains From Selection
A. Time Interval per Cycle
B. Potential Gain per Cycle .
C. Potential Inbreeding per Cycle
V. Polycrossing
VI. Hybrid Cultivars
VII. Conclusions
Literature Cited
Meristic And Organogenetic Variation In Ruppia Occidentalis And R. Maritima, Robert B. Kaul
Meristic And Organogenetic Variation In Ruppia Occidentalis And R. Maritima, Robert B. Kaul
School of Biological Sciences: Faculty Publications
Floral meristic and organogenetic variation was sampled in Ruppia occidentalis from an alkaline lake of the Nebraska Sandhills and in Ruppia maritima var. rostrata from a saline, non-Sandhills lake nearby. The androecium is meristically stable, always having two stamens, but the gynoecium is not. Seventy-two percent of the flowers of R. maritima had four carpels and the others had three, and in 80% of inflorescences the two flowers had the same number. In about one-third of inflorescences having dissimilar carpel numbers, the four-carpellate flower was uppermost. The number of carpels in each flower of R. occidentalis ranged from four to …
Molecular Approaches For Control Of Tomato Bushy Stunt Virus, H. B. Scholthof, M. Borja, Thomas Jack Morris, A. O. Jackson
Molecular Approaches For Control Of Tomato Bushy Stunt Virus, H. B. Scholthof, M. Borja, Thomas Jack Morris, A. O. Jackson
School of Biological Sciences: Faculty Publications
I N this overview strategies are discussed that are currently being tested in our laboratory in an effort to engineer resistance against tomato bushy stunt virus (TBSV) in plants. TBSV is chosen as a model-system since this is an economically important RNA virus that is well characterized at the molecular level and the virus has some interesting and potentially useful features that can be exploited to produce resistant plants. Moreover, we anticipate that the information derived from our studies with TBSV will be applicable in developing resistance to other plant viruses. Some approaches that we are attempting to apply to …
The Prairie Naturalist Volume 24, No.4 December 1992
The Prairie Naturalist Volume 24, No.4 December 1992
The Prairie Naturalist
NEW VASCULAR PLANT RECORDS FOR NORTIl DAKOTA ▪ B. L. Heidel, A. J. Duxbury, W.T. Barker, and J. R. Challey
GROWTH OF BLUEGILLS AND YELLOW PERCH IN SOUTH DAKOTA WATERS ▪ D.w. Willis, J.P. Lott, C.S. Guy, and D.O. Lucchesi
SEASONAL VARIATION IN SAMPLING DATA FOR WALLEYE AND SAUGER COLLECTED WITH GILL NETS FROM LAKE SAKAKAWEA, NORTH DAKOTA ▪ S.W. Mero andD.W. Willis
OBSERVATIONS ON NESTING OF THE AMERICAN BITTERN IN NORTIlWEST MINNESOTA ▪ W D. Svedarsky
FOOD HABITS OF MOURNING DOVES IN EAST CENTRAL SOUTH DAKOTA ▪ J.T. Van't Hul and J.A. Jenks
DISTRIBUTION OF TIlE PYGMY SHREW IN …
The Prairie Naturalist Volume 24, No.3 September 1992
The Prairie Naturalist Volume 24, No.3 September 1992
The Prairie Naturalist
VESICULAR-ARBUSCULAR MYCORRHIZAE IN BLOWOUT PENSTEMON ▪ T. R. Flessner and J. Stubbendieck
STATUS OF HAPLOPAPPUS FREMONTII A. GRAY SSP. MONOCEPHALUS (A. NELSON) HALL [ASTERACEAE] IN COLORADO ▪ K.A. Schulz and R.B. Shaw
HABITAT CHANGES ABOVE AND BELOW WATER PROJECTS ON THE NORTH PLATTE AND SOUTH PLATTE RIVERS IN NEBRASKA ▪ P. M. McDonald and J.G. Sidle
INSECT FLORAL VISITORS TO FOUR SPECIES OF TALL-GRASS PRAIRIE COMPOSITE (ASTERACEAE: HELIANTHEAE) ▪ J. A. Dickinson and M. J. McKone
SUMMER BIRD USE OF KANSAS WINDBREAKS ▪ T.T. Cable, R.L. Schroeder, V. Brack, Jr., and P.S. Cook
RING-NECKED PHEASANTS AND FOOD PLOT SIZE (GALLIFORMES: …
The Prairie Naturalist Volume 24. No.2 June 1992
The Prairie Naturalist Volume 24. No.2 June 1992
The Prairie Naturalist
FIRST FLOWERING DATES AND FLOWERING PERIODS OF PRAIRIE PLANTS AT WOODWORTH. NORTH DAKOTA ▪ J. M. Callow, J A. Kanlrud, and K.F. Higgins
PROBABLE DISTRIBUTION OF THE WOODCHUCK IN NORTH CENTRAL KANSAS ▪ J.R. Choate and T. W. Haner
NEST AND NEST SITE CHARACTERISTICS OF SOME GROUND-NESTING NON-PASSERINE BIRDS OF NORTHERN GRASSLANDS ▪ H A. Kantrud and K.F. Higgins
CHRISTMAS BIRD COUNTS FOR NORTH DAKOTA ▪ R.N. Randall
COMPARISON OF SIZE STRUCfURE AND CATCH RATE FOR LARGEMOUTH BASS SAMPLES COLLECTED BY ELECTROFlSHING AND ANGLING ▪ DJ. Isaak, T.D. Hill, and D.W. Willis
MULE DEER HABITAT USE IN THE NORTH DAKOTA …
The Prairie Naturalist Volume 24, No.1 March 1992
The Prairie Naturalist Volume 24, No.1 March 1992
The Prairie Naturalist
HABITAT CONSERVATION FOR NESTING LEAST TERNS AND PIPING PLOVERS ON THE PLATTE RIVER, NEBRASKA ▪ J. W. Ziewitz, J. G. Sidle, and J. J. Dinan
DIURNAL FLIGHT TIME OF WINTERING CANADA GEESE: CONSIDERATION OF REFUGES AND FLIGHT ENERGETICS ▪ J. E. Austin and D. D. Humburg
MYCOTOXIN OCCURRENCE IN WASTE FIELD CORN AND INGESTA OF WILD GEESE IN THE NORTHERN GREAT PLAINS ▪ K. F. Higgins, R. M. Barta, R. G. Neiger, G. E. Rottinghaus, and R. I. Sterry
NOTES
Cost of Nest Reuse by Western Kingbirds ▪ T. M. Bergin
A New Record for Falcate Spurge in the Midwest …
Distribution, Habitats, And Taxonomy Of Ruppia Maritima L. And R. Occidentalis S. Watson In Nebraska, Robert B. Kaul
Distribution, Habitats, And Taxonomy Of Ruppia Maritima L. And R. Occidentalis S. Watson In Nebraska, Robert B. Kaul
Transactions of the Nebraska Academy of Sciences and Affiliated Societies
Specimens of Ruppia from all eleven Nebraska counties in which it is known fall into two groups: R. occidentalis in alkaline Sandhills waters and R. maritima in saline waters of the Platte River Valley and Lancaster County. Ruppia occidentalis is distinguished by its more robust size; redspotted leaves and stems; terete, entire, obtuse leaves; 4-8(9) carpels; and by two elliptic white spots on its endocarp, among other characteristics. Ruppia maritima is more delicate and unspotted; the leaves are oblate in section, sub-apically denticulate, and acute-acuminate; the carpels are 3 or 4, and the endocarp spots are nearly circular. Both species …
Jasmonate, Genes, And Fragrant Signals, Paul E. Staswick
Jasmonate, Genes, And Fragrant Signals, Paul E. Staswick
Department of Agronomy and Horticulture: Faculty Publications
Although first recognized for its growth-inhibiting activity about 20 years ago, JA2 and its fragrant methyl ester MeJA (referred to here collectively as jasmonate) are receiving renewed interest as potentially important signaling molecules in plants. This is because jasmonate markedly increases the expression of specific plant genes, some of which are wound responsive. Similarities with fatty acid-derived stress signaling molecules in animals (1) make jasmonate of general biological interest.
Local Polyploid Variation In The Native Prairie Grass Andropogon Gerardii, Kathleen H. Keeler
Local Polyploid Variation In The Native Prairie Grass Andropogon Gerardii, Kathleen H. Keeler
School of Biological Sciences: Faculty Publications
The microscale distribution of polyploid variants of the dominant grass big bluestem (Andropogon gerardii) in virgin tallgrass prairie was mapped using flow cytometry. The correlation between DNA content and polyploidy allows the use of flow cytometry for nondestructive determination of polyploidy in intact plants. At Konza Prairie, local plots contained from 0 to 100% hexaploid cytotypes but most showed fine-scale mixing of the polyploid variants. The relationship of cytotype frequency to moisture availability or burning history was nonsignificant
The Prairie Naturalist Volume 23, No. 4. December 1991
The Prairie Naturalist Volume 23, No. 4. December 1991
The Prairie Naturalist
Paul B. Kannowski, Editor
Nikki R. Seabloom, Assistant Editor
Douglas H. Johnson, Book Review Editor
CONTENTS
KENTUCKY BLUEGRASS RESPONSE TO BURNING: INTERACTIONS BETWEEN FIRE AND SOIL MOISTURE ▪ G. W. Blankespoor and B. S. Bich
FORAGE PRODUCTION AND USE ON BIGHORN SHEEP WINTER RANGE
FOLLOWING SPRING BURNING IN GRASSLAND AND PONDEROSA PINE HABITATS ▪ T. G. Easterly and K. J. Jenkins
SHORT-TERM MORTALITY OF SMALLMOUTH BASS CAUGHT DURING A LIVE-RELEASE TOURNAMENT AT LAKE OAHE, SOUTH DAKOTA ▪ J. J. Jackson and D. W. Willis
CRAYFISH IN SAND LAKE NATIONAL WILDLIFE REFUGE ▪ C. D. Dieter
PIPING PLOVERS NEST ON DRY …