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Full-Text Articles in Life Sciences

A Daylily Affair, James R. Brennan Jun 1997

A Daylily Affair, James R. Brennan

Bridgewater Review

No abstract provided.


Density, Distribution, And Habitat Of Flammulated Owls In Idaho, Craig Groves, Terry Frederick, Glenn Frederick, Eric Atkinson, Melonie Atkinson, Jay Shepherd, Gregg Servheen May 1997

Density, Distribution, And Habitat Of Flammulated Owls In Idaho, Craig Groves, Terry Frederick, Glenn Frederick, Eric Atkinson, Melonie Atkinson, Jay Shepherd, Gregg Servheen

Great Basin Naturalist

From 1990 to 1992 we surveyed for Flammulated Owls (Otus flammeolus) in 3 areas in Idaho: Salmon National Forest (SNF), Payette National Forest and adjacent Hells Canyon National Recreation Area (PNF-HCNRA), and Nez Perce National Forest (NPNF). We also collected and summarized information on all historic and modern records of Flammulated Owls in Idaho. Flammulated Owls were detected on 65% of 68 routes (2–16 km in length) surveyed at densities ranging from 0.04 to 1.25 singing males/40 ha. Owls were detected on survey routes as early as 10 May and as late as 23 July. Mean ...


Diplostomiasis In Native And Introduced Fishes From Yellowstone Lake, Wyoming, Victor H. Inchausty, Michael Foutz, Richard A. Heckmann, Claudete Ruas, Paulo Ruas May 1997

Diplostomiasis In Native And Introduced Fishes From Yellowstone Lake, Wyoming, Victor H. Inchausty, Michael Foutz, Richard A. Heckmann, Claudete Ruas, Paulo Ruas

Great Basin Naturalist

Totals of 101 native Yellowstone cutthroat (Oncorhynchus clarki bouvieri), 27 introduced lake trout (Salvelinus namaycush), and 40 introduced longnose sucker (Catostomus catostomus) from Yellowstone Lake, Wyoming, USA, were examined for eye flukes. Metacercariae of the trematode fluke Diplostomum were in vitreous humor and/or lens of 94% of Yellowstone cutthroat trout, 92% of lake trout, and 78% of longnose sucker. Longnose sucker had 7% prevalence of infection in both lens and vitreous humor of metacercariae, while Yellowstone cutthroat trout had 3% and lake trout 8%. Diplostomum spathaceum was in lens tissue of 5% of infected Yellowstone cutthroat trout and 93 ...


Defusing The Salt Time Bomb, David Berry Jan 1997

Defusing The Salt Time Bomb, David Berry

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

Practical adviser to famers about managing salt affected soils on their property.


Bean Yellow Mosiac Virus In Lupins, Roger Jones Jan 1997

Bean Yellow Mosiac Virus In Lupins, Roger Jones

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

Bean yellow mosaic virus (BYMV) is a threat to lupin crops in high rainfall areas of south-western Australia, particularly in districts where subterranean clover pastures are prevalent. The disease causes markedly reduced grain yield in all types of lupins. Worldwide this is the most important virus affecting lupins. The author outlines the symptoms, spread and management of this serious disease.


Field Day 1997, Kansas State University. Agricultural Experiment Station And Cooperative Extension Service Jan 1997

Field Day 1997, Kansas State University. Agricultural Experiment Station And Cooperative Extension Service

Kansas Agricultural Experiment Station Research Reports

Each Field Day report consists of individual research reports on topics specific to the region, including cultural methods for most of the major crops grown in Kansas, mitigating the effects of weeds, insects, and disease associated with those crops, and irrigation. Research is conducted and reports written by staff of the K-State Research and Extension Southwest Research Extension Center.


Field Research 1997, Dale L. Fjell Jan 1997

Field Research 1997, Dale L. Fjell

Kansas Agricultural Experiment Station Research Reports

No abstract provided.


Two New Species Of Uncinia (Cyperaceae) From Chile, Gerald A. Wheeler Jan 1997

Two New Species Of Uncinia (Cyperaceae) From Chile, Gerald A. Wheeler

Aliso: A Journal of Systematic and Floristic Botany

Two new species of Uncinia (Cyperaceae) are described from Chile. Both are local endemics, with U. chilensis known from VIII (Bío Bío) and IX (Araucanía) regións of central Chile and U. araucana from IX Región only.


Uncinia (Cyperaceae) Of Ecuador, Gerald A. Wheeler, Paul Goetghebeur Jan 1997

Uncinia (Cyperaceae) Of Ecuador, Gerald A. Wheeler, Paul Goetghebeur

Aliso: A Journal of Systematic and Floristic Botany

Nine species of Uncinia (Cyperaceae: Caricoideae) are recorded from Ecuador, one of which, U. ecuadorensis, is newly described and illustrated here. Descriptions, illustrations, distribution maps, and both artificial and vegetative keys are provided for the nine species, and for some uncinias additional taxonomic, phytogeographic and ecological comments are made. A lectotype is designated for the name U. lenuis.


Additions To The Vascular Flora Of San Clemente Island, Los Angeles County, California, With Notes On Clarifications And Deletions, Timothy S. Ross, Steve Boyd, Steve Junak Jan 1997

Additions To The Vascular Flora Of San Clemente Island, Los Angeles County, California, With Notes On Clarifications And Deletions, Timothy S. Ross, Steve Boyd, Steve Junak

Aliso: A Journal of Systematic and Floristic Botany

The number of vascular plant taxa reported from San Clemente Island, California, is briefly summarized. Recent additions to the vascular flora are presented and, with one exception, representative voucher specimens are cited as substantiation. Of the taxa di scussed, 68 are previously unreported taxa, and six are substantiations of previously dubious reports. An additional dozen taxa are cited in relation to clarifications or deletions. Based on current knowledge, we estimate the known flora to consist of 396 species with an additional 19 infraspecific taxa represented. Of these 415 taxa, 69.2% (272 speciesl15 additional subspecies or varieties) are considered indigenous ...


Wood Anatomy Of Buddlejaceae, Sherwin Carlquist Jan 1997

Wood Anatomy Of Buddlejaceae, Sherwin Carlquist

Aliso: A Journal of Systematic and Floristic Botany

Quantitative and qualitative data are presented for 23 species of Buddleja and one species each of Emorya, Nuxia, and Peltanthera. Although crystal distribution is likely a systematic feature of some species of Buddleja, other wood features relate closely to ecology. Features correlated with xeromorphy in Buddleja include strongly marked growth rings (terminating with vascular tracheids), narrower mean vessel diameter, shorter vessel elements, greater vessel density, and helical thickenings in vessels. Old World species of Buddleja cannot be differentiated from New World species on the basis of wood features. Emorya wood is like that of xeromorphic species of Buddleja. Lateral wall ...


Phylogeny Of Polemoniaceae Based On Nuclear Ribosomal Internal Transcribed Spacer Dna Sequences, J. Mark Porter Jan 1997

Phylogeny Of Polemoniaceae Based On Nuclear Ribosomal Internal Transcribed Spacer Dna Sequences, J. Mark Porter

Aliso: A Journal of Systematic and Floristic Botany

Nuclear ribosomal internal transcribed spacer (ITS) DNA sequences are used to estimate the phylogeny of 53 members of Polemoniaceae, representing all but two genera of the family. Fitch parsimony analysis of equal-weighted nucleotide sites result in 1080 minimal-length trees. However, when alignment-ambiguous positions are removed and an II: 10 transition to transversion weighting is imposed only eight trees are found. These data are used to address two issues: I) patterns of diversification in Polemoniaceae, and 2) the circumscription and monophyly of the genus Gilia. Although the monophyly of Polemoniaceae is well supported, relationships inferred among the earliest diverging lineages are ...


Hierarchial Roots And Shoots Or Opera Jehovae Magna! (Psalms 111:2), Dan H. Nicolson Jan 1997

Hierarchial Roots And Shoots Or Opera Jehovae Magna! (Psalms 111:2), Dan H. Nicolson

Aliso: A Journal of Systematic and Floristic Botany

The philosophy of Linnaeus's classification, Systema Naturae, is briefly reviewed, as well as those of post-Linnaean systems of plant classification. Texts of current codes of nomenclature pertaining to hierarchy, including associated rank terminations, are compared.


Problems In Cladistic Classification: Higher-Level Relationships In Land Plants, Peter R. Crane, Paul Kenrick Jan 1997

Problems In Cladistic Classification: Higher-Level Relationships In Land Plants, Peter R. Crane, Paul Kenrick

Aliso: A Journal of Systematic and Floristic Botany

Recent cladistic analyses of green plants recognize an extensive hierarchical series of relatively well-supported monophyletic groups. Translating this hierarchical pattern of relationships into a usable and informative written classification is important for purposes of scientific communication, research and teaching. However, in the context of the "Linnean" hierarchy, as manifested in the current International code of Botanical Nomenclature (ICBN), effecting this translation confronts substantial practical difficulties--especially the proliferation of hierarchical levels. These problems are exacerbated by the current emphasis of the ICBN on a hierarchy in which different ranks have different formal rank-based endings. These difficulties could be ameliorated by de-emphasizing ...


Exploring Alternative Systems Of Classification, Kathleen A. Kron Jan 1997

Exploring Alternative Systems Of Classification, Kathleen A. Kron

Aliso: A Journal of Systematic and Floristic Botany

Classification involves the development of a system of naming clades that can represent evolutionary relationships accurately and concisely. Using the acid-loving heath plants (Ericales) as an example, one can explore the application of different classification methods. The Linnean system of naming retains the traditional hierarchical framework (named ranks) and allows for the application of many cuqently used names. The "phylogenetic systematic" approach recommends the removal of an absolute hierarchy but allows retention of traditionally used endings such as -aceae. Historical usage of these names can lead to confusion when the names are used within a discussion or text, especially when ...


Classification: More Than Just Branching Patterns Of Evolution, Tod F. Stuessy Jan 1997

Classification: More Than Just Branching Patterns Of Evolution, Tod F. Stuessy

Aliso: A Journal of Systematic and Floristic Botany

The past 35 years in biological systematics have been a time of remarkable philosophical and methodological developments. For nearly a century after Darwin's Origin of Species, systematists worked to understand the diversity of nature based on evolutionary relationships. Numerous concepts were presented and elaborated upon, such as homology, parallelism, divergence, primitiveness and advancedness, cladogenesis and anagenesis. Classifications were based solidly on phylogenetic concepts; they were avowedly monophyletic. Phenetics emphasized the immense challenges represented by phylogeny reconstruction and advised against basing classifications upon it. Pheneticists forced reevaluation of all previous classificatory efforts, and objectivity and repeatability in both grouping ...


The Linnaean Hierarchy And The Evolutionization Of Taxonomy, With Emphasis On The Problem Of Nomenclature, Kevin De Queiroz Jan 1997

The Linnaean Hierarchy And The Evolutionization Of Taxonomy, With Emphasis On The Problem Of Nomenclature, Kevin De Queiroz

Aliso: A Journal of Systematic and Floristic Botany

During the post-Darwinian history of taxonomy, the Linnaean hierarchy has maintained its role as a means for representing hierarchical taxonomic relationships. During the same period, the principle of descent has taken on an increasingly important role as the basis for reformulated versions of fundamental taxonomic concepts and principles. Early in this history, the principle of descent provided an explanation for the existence of taxa and implied a nested, hierarchical structure for taxonomic relationships. Although an evolutionary explanation for taxa contradicted the Aristotelian context within which the Linnaean hierarchy was developed, the nested, hierarchical structure of taxonomic rela· tionships implied by ...


Karyotypes And Idiograms Of Some Western North American Species Of Lotus (Fabaceae), William F. Grant Jan 1997

Karyotypes And Idiograms Of Some Western North American Species Of Lotus (Fabaceae), William F. Grant

Aliso: A Journal of Systematic and Floristic Botany

Karyotypes and idiograms are presented for 12 species (L. argophyllus var. argophyllus, L. crassifolius, L. dendroideus var. dendroideus, L. grandifiorus, L. humistratus, L. oblongifolius var. oblongifolius, L. stipularis, L. scoparius var. scoparius, L. salsuginosus var. salsuginosus, L. rigidus, L. wrangelianus, L. wrightii) and 3 varieties (L. argophyllus var. argenteus, L. nevadensis var. douglasii, L. scoparius var. brevialatus) of Lotus L. (Fabaceae) belonging to four different groups of the genus (Hosackia, Syrmatium, Microlotus, and Simpteria). The chromosome number for L. dendroideus var. dendroideus (2n = 14) is reported for the first time. Tetraploid cells (2n = 28) were observed in a ...


Vegetative Proliferation In Polypogon Monspeliensis (Gramineae), Eric H. Roalson, Kelly W. Allred Jan 1997

Vegetative Proliferation In Polypogon Monspeliensis (Gramineae), Eric H. Roalson, Kelly W. Allred

Aliso: A Journal of Systematic and Floristic Botany

No abstract provided.


The Euphorbiaceae Of Sonora, Mexico, Victor W. Steinmann, Richard S. Felger Jan 1997

The Euphorbiaceae Of Sonora, Mexico, Victor W. Steinmann, Richard S. Felger

Aliso: A Journal of Systematic and Floristic Botany

This publication is an account of the Euphorbiaceae in the state of Sonora, México. Nineteen genera, 143 species, and three additional varieties are recorded for the state; three species expected within the state are also treated. One species of Acalypha and three species and one subspecies of Euphorbia are described. Dichotomous keys for the identification of genera and species are provided. Bibliographic citations, type information, synonyms, brief habit descriptions, times of reproduction, habitat preferences as well as elevational range within Sonora, geographical distribution, and representative specimens are given for each species. When appropriate, notes on uses, taxonomic or nomenclatural problems ...


Kansas Fertilizer Research 1996, Ray E. Lamond Jan 1997

Kansas Fertilizer Research 1996, Ray E. Lamond

Kansas Agricultural Experiment Station Research Reports

No abstract provided.


K-State Turfgrass Research 1997, Kansas State University. Agricultural Experiment Station And Cooperative Extension Service Jan 1997

K-State Turfgrass Research 1997, Kansas State University. Agricultural Experiment Station And Cooperative Extension Service

Kansas Agricultural Experiment Station Research Reports

With our staff at full strength, several new research projects have been initiated for the 1997 season. As always, we are anxious to hear your suggestions for research that can be done to improve our ability to maintain healthy turf in Kansas.


Effect Of Media Constituents On In Vitro Culturing Of Cowpea (Vigna Unguiculata) Shoot Tip And Leaf Disk Explants, Mohanjeet S. Brar, Edwin J. Anderson, Teddy E. Morelock, Ronald W. Mcnew Jan 1997

Effect Of Media Constituents On In Vitro Culturing Of Cowpea (Vigna Unguiculata) Shoot Tip And Leaf Disk Explants, Mohanjeet S. Brar, Edwin J. Anderson, Teddy E. Morelock, Ronald W. Mcnew

Journal of the Arkansas Academy of Science

Cowpea is an important legume food crop that is commonly grown in Arkansas and numerous other southern states. The application of biotechnological approaches for the improvement of U.S. cowpea genotypes is currently not possible due to the lack of a regeneration and transformation system. Therefore, the first priority of our research efforts is the development of a plant regeneration system that will facilitate plant transformation studies. In an effort to optimize the media requirements for tissue culturing cowpea, we evaluated the in vitro response of shoot tip and leaf disk explants to various levels of Murashige and Skoog (MS ...


Factors Affecting Transformation Efficiency Of Poplar Hybrid Line Nc5331 By Agrobacterium Tumefaciens, Xin Y. Li, Feng H. Huang, Edward E. Gbur Jr. Jan 1997

Factors Affecting Transformation Efficiency Of Poplar Hybrid Line Nc5331 By Agrobacterium Tumefaciens, Xin Y. Li, Feng H. Huang, Edward E. Gbur Jr.

Journal of the Arkansas Academy of Science

Acetosyringone, pH, and glucose, which may affect Agrobacterium-mediated gene transformation to poplar hybrid line NC5331, were investigated in an attempt to raise the gene transfer efficiency. The Agrobacterium tumefaciens strain used harbored disarmed vector (pMON9749) carrying a bet-glucuronidase gene and a kanamycin resistant marker. With the addition of acetosyringone at 25 to 75 MuM, the transformation efficiency was significantly enhanced, but dependent on pH. Acetosyringone required a pH above 5.8 to achieve an efficient gene transfer and failed to enhance the transformation at lower pH. However, with addition of both acetosyringone and glucose, the transformation was not affected by ...


Prediction Of Potential Antimigraine Activity Using Artificial Neural Networks, Qing Luo, Jerry A. Darsey, Cesar M. Compadre, Sanjay K. Mitra Jan 1997

Prediction Of Potential Antimigraine Activity Using Artificial Neural Networks, Qing Luo, Jerry A. Darsey, Cesar M. Compadre, Sanjay K. Mitra

Journal of the Arkansas Academy of Science

More than 10 million Americans, three quarters of them women, suffer some degree of recurrent migraine headaches. Feverfew [Tanacetum parthenium (L.) Schultz-Bip.) is a member of the Asteraceae family that is native to Europe. This plant is a perennial flowering aromatic plant common in gardens. It has been widely used as a self-medication of arthritis, fever, and migraine headaches for over 2000 years. Sesquiterpene lactones (SL) are the components responsible for the antimigraine activity of feverfew. In this research, the relationship between SL structural information and their biological activity was studied by using Gaussian 92 program in conjunction with artificial ...


Floristic Survey And Annotated Checklist Of The Pine Bluff Arsenal, Stephen A. Walker, Julian Campbell Jan 1997

Floristic Survey And Annotated Checklist Of The Pine Bluff Arsenal, Stephen A. Walker, Julian Campbell

Journal of the Arkansas Academy of Science

We conducted a floristic survey of the Pine Bluff Arsenal during the spring, summer, and fall of 1996. In total, 622 taxa representing 113 families and 351 genera were identified and compiled into an annotated checklist. The largest families were Asteraceae (79 genera), Poaceae (73 genera). Fabaceae (41 genera), and Cyperaceae (38 genera). Exotic species composed only 8.5% of the flora. Fifty-five of the specimens represent new records for Jefferson County.


Ground Flora Composition Following Harvesting Of A Bottomland Hardwood Forest In The Mississippi River Batture Lands, James E. Kellum, Eric Sundell, Brian Roy Lockhart Jan 1997

Ground Flora Composition Following Harvesting Of A Bottomland Hardwood Forest In The Mississippi River Batture Lands, James E. Kellum, Eric Sundell, Brian Roy Lockhart

Journal of the Arkansas Academy of Science

No abstract provided.


New Records For The Distribution Of An Unusual Liverwort, Petalophyllum Ralfsii (Fossombroniaceae), Daniel L. Marsh, Timothy A. Golden, David L. Mcdaniel, Gregory A. Nunley, Winfred D. Crank Jan 1997

New Records For The Distribution Of An Unusual Liverwort, Petalophyllum Ralfsii (Fossombroniaceae), Daniel L. Marsh, Timothy A. Golden, David L. Mcdaniel, Gregory A. Nunley, Winfred D. Crank

Journal of the Arkansas Academy of Science

No abstract provided.


Rediscovery Of Parnassia Asarifolia Vent (Parnassiaceae) In Arkansas, David L. Mcdaniel, Daniel L. Marsh, Winfred D. Crank Jan 1997

Rediscovery Of Parnassia Asarifolia Vent (Parnassiaceae) In Arkansas, David L. Mcdaniel, Daniel L. Marsh, Winfred D. Crank

Journal of the Arkansas Academy of Science

No abstract provided.