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Articles 1 - 30 of 79
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Pesticide Residue Regulation: Analysis Of Food Quality Protection Act Implementation, Linda-Jo Schierow
Pesticide Residue Regulation: Analysis Of Food Quality Protection Act Implementation, Linda-Jo Schierow
RISK: Health, Safety & Environment (1990-2002)
Dr. Schierow discusses the effects of a recent statute on food safety.
The Palms (Arecaceae) Of Sonora, Mexico, Richard S. Felger, Elaine Joyal
The Palms (Arecaceae) Of Sonora, Mexico, Richard S. Felger, Elaine Joyal
Aliso: A Journal of Systematic and Floristic Botany
This publication is an account of the palms (Arecaceae) in the state of Sonora in northwestern Mexico. Six native palm species in three genera are recorded for Sonora: Brahea with four species, and Sabal and Washingtonia each with one species. Relationships and taxonomy within Brahea, especially B. elegans, remain unresolved. Brief botanical descriptions, taxonomic synopses, local names, identification keys, conservation status and recommendations, and distributional and ethno- botanical information are provided for each species. Basionyms and types are cited. Distributions are documented with citations of nearly all herbarium specimens known to us from Sonora. Many palm populations in …
Wood Anatomy Of Agdestis (Caryophyllales): Systematic Position And Nature Of Successive Cambia, Sherwin Carlquist
Wood Anatomy Of Agdestis (Caryophyllales): Systematic Position And Nature Of Successive Cambia, Sherwin Carlquist
Aliso: A Journal of Systematic and Floristic Botany
Features in which Agdestis differs from Phytolaccaceae s. s. include presence of both libriform fibers and vasicentric tracheids (rather than one or the other); bands and strands of thin-walled apotracheal parenchyma (in addition to paratracheal scanty parenchyma}, and raylessness (also reported for Bougainvillea of Nyctaginaceae, a family close to Phytolaccaceae). Dimorphism in vessel diameter in Agdestis (narrow vessels like libriform fibers in diameter) is attributable to the lianoid habit. Packets of crystals coarser than typical for raphides occur idioblastically in Agdestis, as do raphides in Phytolacca. ln Phytolacca and in other Phytolaccaceae, one finds an unusual feature that …
Wood And Bark Anatomy Of Schisandraceae: Implications For Phylogeny, Habit, And Vessel Evolution, Sherwin Carlquist
Wood And Bark Anatomy Of Schisandraceae: Implications For Phylogeny, Habit, And Vessel Evolution, Sherwin Carlquist
Aliso: A Journal of Systematic and Floristic Botany
Qualitative and quantitative features are reported for mature wood and bark of two species of Kadsura and five species of Schisandra. Newly reported for the family are predominance of simple perforation plates (all species); presence of pit membrane remnants in vessels of first-formed secondary xylem; two to three series of pits per facet on tracheids; diffuse axial parenchyma (Kadsura); multiseri- ate rays more than three cells wide at the widest point (all species); ethereal oil cells in axial xylem; and certain details of comparative bark anatomy. Differences in wood anatomy between Illiciaceae and Schisandraceae are nearly all …
An Expanded Circumscription Of Bouteloua (Gramineae: Choridoideae): New Combinations And Names, J. Travis Columbus
An Expanded Circumscription Of Bouteloua (Gramineae: Choridoideae): New Combinations And Names, J. Travis Columbus
Aliso: A Journal of Systematic and Floristic Botany
Cladistic analysis of nuclear ribosomal and chloroplast DNA sequences has revealed that the New World grass genus Bouteloua (Chloridoideae) is not monophyletic. Indeed, some species of Bouteloua are more closely related to species in other genera than to congeners. The problem was dealt with by expanding the circumscription of Bouteloua to include species formerly positioned in the satellite genera Buchloe (1 species), Buchlomimus/em> (1), Cathestecum/em> (4), Cyclostachya/em> (1), Griffithsochloa (1), Opizia (2), Pentarrhaphis (3), Pringleochloa (1), and Soderstromia(1). Thirteen new combinations and names were necessary. As here circumscribed, Bouteloua is monophyletic and comprises 57 species.
Glume Absence In The Orcuttieae (Gramineae: Chloridoideae) And A Hypothisis Of Intratribal Relationships, Eric H. Roalson
Glume Absence In The Orcuttieae (Gramineae: Chloridoideae) And A Hypothisis Of Intratribal Relationships, Eric H. Roalson
Aliso: A Journal of Systematic and Floristic Botany
This study addresses glume absence in tribe Orcuttieae. In Orcuttia califomica, O. inaequalis, and O. viscida, all spikelets possess two glumes except for the terminal spikelet of the inflorescence, which lacks both glumes. In O. pilosa and Tuctoria greenei the terminal spikelet lacks only the first (proximal) glume, whereas in O. tenuis, T. fragilis, and T. mucronata both glumes are developed on all spikelets. This is the first report of glume absence in species of Orcuttieae other than Neostapfia colusana, which has been long reported to lack both glumes on all spikelets. A hypothesis …
Laboulbeniales On Semiaquatic Heteroptera. Viii. Monandromyces, A New Genus Based On Autophagomeces Microveliae(Laboulbeniales), Richard K. Benjamin
Laboulbeniales On Semiaquatic Heteroptera. Viii. Monandromyces, A New Genus Based On Autophagomeces Microveliae(Laboulbeniales), Richard K. Benjamin
Aliso: A Journal of Systematic and Floristic Botany
A new genus of Laboulbeniales (Laboulbeniaceae: Stigmatomycetinae), Monandromyces, was described. Its type species, M. hemipteralis, was based on Autophagomyces hemipteralis. The latter, which parasitizes a riparian bug, a species of Microvelia (Heteroptera: Veliidae), was characterized by Roland Thaxter in 1931. Ten new species of Monandromyces- taken from members of three genera of Veliidae-were described as follows: M. australis, M. falcatus, M. polhemorum, M. protuberans, M. tenuistipitis, and M. umbonatus (on Microvelia spp.); M. neoalardi (on Neoalardus sp.); and M. elongates, M. longispinae, and M. pseudoveliae (on Pseudovelia spp.). Keys …
Vascular Flora Of The Liebre Mountains, Western Transverse Ranges, California, Steve Boyd
Vascular Flora Of The Liebre Mountains, Western Transverse Ranges, California, Steve Boyd
Aliso: A Journal of Systematic and Floristic Botany
The Liebre Mountains form a discrete unit of the Transverse Ranges of southern California. Geographically, the range is transitional to the San Gabriel Mountains, Inner Coast Ranges, Tehachapi Mountains, and Mojave Desert. A total of 1010 vascular plant taxa was recorded from the range,representing 104 families and 400 genera. The ratio of native vs. nonnative elements of the flora is 4:1, similar to that documented in other areas of cismontane southern California. The range is noteworthy for the diversity of Quercus and oak-dominated vegetation. A total of 32 sensitive plant taxa (rare, threatened or endangered) was recorded from the range.
Articulated Cork In Calotropis Procera (Asclepiadaceae), Simcha Lev-Yadun
Articulated Cork In Calotropis Procera (Asclepiadaceae), Simcha Lev-Yadun
Aliso: A Journal of Systematic and Floristic Botany
The cork of the small tree. Calotropis procera, which grows in a very hot district of Israel, is remarkable for its thickness and brittleness. The cork of the stems and large branches is composed of longitudinal ridges that extend over several internodes. The cork ridges have deep fissures around the circumference at almost every node. I propose that these nodal fissures in the cork serve as joints for two functions: (1) to prevent breakage of the fragile cork layer when branches bend under wind stress, and (2) to allow thermal expansion while avoiding tissue cracking on extremely hot days, …
Potential Utility Of Chloroplast Trnl (Uaa) Gene Intron Sequences For Inferring Phylogeny In Scrophulariaceae, C. Edward Freeman, Ron Scogin
Potential Utility Of Chloroplast Trnl (Uaa) Gene Intron Sequences For Inferring Phylogeny In Scrophulariaceae, C. Edward Freeman, Ron Scogin
Aliso: A Journal of Systematic and Floristic Botany
Whereas chloroplast DNA-derived sequence data from protein coding regions have been utilized successfully at many taxonomic levels in recent years, sequences which are variable enough to allow for efficient phylogenetic inference (maximum information with relatively low sequencing costs and effort) at the subfamilial level huve been few. Sequence data were obtained in this study from a noncoding region, the trnL (UAA) gene intron, from a selection of taxa from the Scrophulariaceae and closely related families (representing 41 species in 26 genera). Groups of species from commonly recognized tribes and subtribes were included to determine if these taxa were grouped together …
Improving Feed Grains, Bruce P. Mullan
Improving Feed Grains, Bruce P. Mullan
Journal of the Department of Agriculture, Western Australia, Series 4
Clearly, to encourage grain growers to focus their production systems towards feed grains, it is important to first identify the reasons for variation in the nutritional value of grains and then to develop rapid, cheap, and accurate methods of measuring these factors. The analytical methods should ideally be suitable for application either at the site of grain delivery from the farm or within the place of stockfeed manufacture. This will mean the nutritional value of the grain can be known before it is used. The rational marketing of feed grains could then be achieved, with the benefits from more efficient …
Managing Lupin Anthracnose, Greg Shea, W A. Cowling, B J. Burchell, D Luckett, H Yang, Mark W. Sweetingham, Geoff J. Thomas
Managing Lupin Anthracnose, Greg Shea, W A. Cowling, B J. Burchell, D Luckett, H Yang, Mark W. Sweetingham, Geoff J. Thomas
Journal of the Department of Agriculture, Western Australia, Series 4
Anthracnose in lupins was first reported in commercial crops in Western Australia in September 1996. By October 1996, several thousand lupin breeding lines and wild types of 11 lupin species were sown in New Zealand for resistance screening. In 1997, resistance to anthracnose was confirmed in several breeding fines and commercial cultivars of narrow-leafed lupins (I. angustifolius), landraces of albus lupins (I. albus) and wild types of several other lupin species. Important information on critical seed infection levels and fungicide seed treatment has also been determined.
Accelerating Variety Release With Double Haploids, Sue Broughton
Accelerating Variety Release With Double Haploids, Sue Broughton
Journal of the Department of Agriculture, Western Australia, Series 4
The use of plant tissue culture to produce special lines called doubled haploids is reducing the time taken to breed new varieties of cereal crops by up to three years. Sue Broughton outlines what doubled haploids are, how they are produced, and why they have been able to short circuit the usual lengthy breeding process.
Eleocharis Yecorensis (Cyperaceae), A New Species Of Spike-Sedge From México, Eric H. Roalson
Eleocharis Yecorensis (Cyperaceae), A New Species Of Spike-Sedge From México, Eric H. Roalson
Aliso: A Journal of Systematic and Floristic Botany
Eleocharis (Cyperaceae) includes approximately 200 species and is particularly diverse in the New World. A newly discovered species of subgenus Limnochloa is described from the states of Sonora and Mexico, Mexico. Eleocharis yecorensis is related to E. acutangula, E. mutata. and E. quadrangulata and can be distinguished from these species by its five-angled culms, obdeltoid achenes. and narrow neck between tubercle and achene body. In addition. E. yecorensis possesses root storage structures similar to those found in the Chinese water chestnut, Eleocharis dulcis.
A Floristic Study Of Sugarloaf Ridge State Park, Sonoma County, California, Frederica S. Bowcutt
A Floristic Study Of Sugarloaf Ridge State Park, Sonoma County, California, Frederica S. Bowcutt
Aliso: A Journal of Systematic and Floristic Botany
A ist of 400 vascular plants was compiled for Sugarloaf Ridge State Park, a 1142 hectare (2820 acre) park in the outer North Coast Ranges within Sonoma County and adjacent western Napa County, California. Relatively undisturbed stands of native perennial bunchgrasses occur the understory In portions of both the oakwood land and the mixed evergreen forest. Grasslands on serpentine in the park are typically dominated by Nassella. One of the sttlte's eastentmost coast redwood forests occurs in the park. Nonnative Centaurea solstitialis rapidly invades annual grasslands and other disturbed in the park. The California Oepanment of and Recreation (DPR) …
Screening Pinus Sylvestris Grown For The Production Of Christmas Trees For Resistance To Western Gall Rust Peridermium Harknessii Using Different Sources Of Aeciospores, Todd A. Burnes, Jennifer Juzwik, Robert A. Blanchette
Screening Pinus Sylvestris Grown For The Production Of Christmas Trees For Resistance To Western Gall Rust Peridermium Harknessii Using Different Sources Of Aeciospores, Todd A. Burnes, Jennifer Juzwik, Robert A. Blanchette
Journal of the Minnesota Academy of Science
Results showed a moderate to high susceptibility of Pinus sylvestris to western gall rust Peridermium harknessii from Pinus sylvestris in Michigan and Pinus banksiana in Minnesota. In general, Pinus sylvestris seed sources were more susceptible to aeciospores collected from Pinus sylvestris than aeciospores collected from Pinus banksiana.
Agrobacterium Rhizogenes-Mediated Hairy Root Formation In Some Rubia Tinctorum L. Populations Grown In Turkey, A. Gülhan Ercan, Kemal Meli̇h Taşkin, Kenan Turgut, Süer Yüce
Agrobacterium Rhizogenes-Mediated Hairy Root Formation In Some Rubia Tinctorum L. Populations Grown In Turkey, A. Gülhan Ercan, Kemal Meli̇h Taşkin, Kenan Turgut, Süer Yüce
Turkish Journal of Botany
Rubia tinctorumL. seeds were collected from 4 different regions of Turkey. Plants were grown in greenhouse and cotyle-dons were inoculated with Agrobacterium rhizogenes strains 15834, 2628, R1000 and 9365. Rubia tinctorum plants were also grown in the field for comparative analysis of root anthraquinone content. Agrobacterium rhizogenesstrain 2628 induced only callus formation on the cut surface of cotyledon explants while strains 15834, R1000 and 9365 produced hairy roots on the same explants. Anthraquinone content was identified in the extracts of the plant roots grown in the field and in the extracts of the Agrobacterium rhizogenes-induced hairy roots. The percentage of …
Southwest Research-Extension Center Field Day 1999
Southwest Research-Extension Center Field Day 1999
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.
Effect Of Zinc Treatment On The Alleviation Of Sodium And Chloride Injury In Tomato (Lycopersicum Esculentum(L.) Mill. Cv. Lale) Grown Under Salinity, Mehmet Alpaslan, Ali İnal, Aydın Güneş, Yakup Çikili, Hesna Özcan
Effect Of Zinc Treatment On The Alleviation Of Sodium And Chloride Injury In Tomato (Lycopersicum Esculentum(L.) Mill. Cv. Lale) Grown Under Salinity, Mehmet Alpaslan, Ali İnal, Aydın Güneş, Yakup Çikili, Hesna Özcan
Turkish Journal of Botany
Nonsaline and saline (30 mM NaCl), Zn (10, 20, 40 mg kg -1 ) and without Zn treatment and factorial combinations of NaCl and Zn on the fresh and dry weights of the plants, and sodium (Na), chloride (Cl) and zinc (Zn) contents of both young and old leaves were determined and the effects of Zn on the Na and Cl translocation within the plants were investigated. Salinity decreased the fresh and dry weights of the plants while this effect of salinity diminished with increasing Zn levels. Na and Cl con-centrations of both young and old leaf tissues decreased with …
Lichen Flora Of Trabzon, Kenan Yazici
Lichen Flora Of Trabzon, Kenan Yazici
Turkish Journal of Botany
This study was performed between May 1993 and November 1995 in Trabzon. A total of 230 species and 1 variety, which belongs to the 35 families in Ascomycotina, were defined. A total of 39 species were understood to be new records for Turkey.
Top Senescence In Sternbergia Lutea(L.) Ker-Gawl. Ex Sprengel And Narcissus Tazettal. Subsp. Tazetta, Hamdi̇ Güray Kutbay
Top Senescence In Sternbergia Lutea(L.) Ker-Gawl. Ex Sprengel And Narcissus Tazettal. Subsp. Tazetta, Hamdi̇ Güray Kutbay
Turkish Journal of Botany
Sternbergia lutea (L.) Ker-Gawl. ex Sprengel and Narcissus tazetta L. subsp. tazetta are two autumnal geophytes belonging to Amaryllidaceae. N. tazetta subsp. tazetta consist of some vomitory alkaloids. S. lutea has also important alkaloids too. In this study nitrogen (N), phosphorus (P) and potassium (K) analysis were carried out in two taxa during vegetative and generative growth phases and the results belonging to vegetative and generative growth phases were compared with each other. As a result of these analysis macroelement concentrations are higher during generative growth phase in under ground parts due to "top senescence".
A New Record From Turkey: Jurinea Stoechadifolia (M.Bieb) Dc., Hayri̇ Duman, Zeki̇ Aytaç
A New Record From Turkey: Jurinea Stoechadifolia (M.Bieb) Dc., Hayri̇ Duman, Zeki̇ Aytaç
Turkish Journal of Botany
Jurinea stoechadifolia (M.Bieb) DC. ( Compositae) is reported for the first time (A4 Çankiri) for the flora of Turkey.
Transgenic Cotton Research Paves The Way For A New Industry In The Kimberley, Geoff Strickland, Amanda Annells
Transgenic Cotton Research Paves The Way For A New Industry In The Kimberley, Geoff Strickland, Amanda Annells
Journal of the Department of Agriculture, Western Australia, Series 4
The use of transgenic cotton varieties (INGARD®) in conjunction with t_x integrated pest management (IPM) systems in the Kimberley region is producing excellent yield and quality prospects for an emerging cotton industry in Western Australia. Geoff Strickland and Amanda Annells report on the value of transgenic cotton and the additional benefits being gained from the use of multi-faceted IPM systems.
Carrot Export Growth Depends On Keeping Cavity Spot Under Control, Allan Mckay, Elaine Davison
Carrot Export Growth Depends On Keeping Cavity Spot Under Control, Allan Mckay, Elaine Davison
Journal of the Department of Agriculture, Western Australia, Series 4
Cavity spot is the most serious disease affecting carrot production in Ly Western Australia. With carrots now being the State's most important horticultural export, Agriculture Western Australia has undertaken extensive research to ensure the export market continues to grow.
Occurrences Of Petalphyllum (Fossombroniaceae) In The Interior Highlands Of Arkansas, Jared W. Kyzer, Daniel L. Marsh
Occurrences Of Petalphyllum (Fossombroniaceae) In The Interior Highlands Of Arkansas, Jared W. Kyzer, Daniel L. Marsh
Journal of the Arkansas Academy of Science
No abstract provided.
Variations In Sphaerocarpos (Marcantiopsida) In Arkansas, Timothy A. Golden, Daniel L. Marsh
Variations In Sphaerocarpos (Marcantiopsida) In Arkansas, Timothy A. Golden, Daniel L. Marsh
Journal of the Arkansas Academy of Science
No abstract provided.
A Contribution To The Moss Flora Of Western Turkey: Moss Flora Of The Kaz Mountain (Balıkesir, Turkey), Adnan Erdağ, Ahmet Yayintaş
A Contribution To The Moss Flora Of Western Turkey: Moss Flora Of The Kaz Mountain (Balıkesir, Turkey), Adnan Erdağ, Ahmet Yayintaş
Turkish Journal of Botany
In the present study, 484 plant specimens were collected and identified from the region. 139 taxa, belonging to 23 families and 63 genera were found. Brachythecium latifolium Kindb. is recorded as the first time to Turkish flora among the others. In addition 12 taxa are new records for square B6 according to Henderson's (1961) grid system.
Nuclear Dna Contents Of Some Endemic Hedysarum L. Species, Nükhet Akpinar, Bayram Yildiz
Nuclear Dna Contents Of Some Endemic Hedysarum L. Species, Nükhet Akpinar, Bayram Yildiz
Turkish Journal of Botany
The nuclear DNA contents and nuclear areas of some endemic Hedysarum L. species were investigated. A significant variation in the DNA content of Hedysarum species was established. The 2C nuclear DNA amount in the Hedysarum species (x = 8) ranged from approximately 4 to 6 picograms. It was found that the variation in the 2C nuclear DNA content was not related to chromosome numbers. However, there was a very high positive linear relationship between nuclear DNA content and nuclear area.
The Effect Of Uracil On The Germination And Growthof Some Leguminous Plants, Yusuf Turan, Muhsi̇n Konuk
The Effect Of Uracil On The Germination And Growthof Some Leguminous Plants, Yusuf Turan, Muhsi̇n Konuk
Turkish Journal of Botany
All known pyrimidine and pyrimidine-derived secondary producs originate from uracil or its precursor, uracil-6-carboxylic acid. The biosynthesis of these products has been suggested to be uracil detoxication mechanisms. The possible toxic effects of uracil on the germination and growh of Pisum sativum L. cultivar Meteor, Lathyrus tingitanus L. in which pyrimidine-derived secondary products occur naturally, and of Phaseolus aureus Roxb. and Glycine max (L.) Merr., in which these compouns do not occur, were examined. The results show that the germination and growth of the P. aureus and G. max seeds under investigation were considerably inhibited by exogenous uracil. The effect …
Airborne Pollen Concentration In Kütahya, Adem Biçakci, Osman Nuri̇ Benli̇oğlu, Di̇lek Erdoğan
Airborne Pollen Concentration In Kütahya, Adem Biçakci, Osman Nuri̇ Benli̇oğlu, Di̇lek Erdoğan
Turkish Journal of Botany
The airborne pollen cocentration in the atmosphere of Kütahya was determined by gravimetry with a Durham sampler in 1996. During this study, 23 taxa of arboreal and 14 taxa of herbaceous pollen grains were collected and identified. Pollen from the following taxa were also found to be prevalent in the atmosphere of Kütahya: Pinus L., Cupressaceae, Platanus orientalis L., Quercus L., Oleaceae, Gramineae, Urticaceae, Chenopodiaceae/ Amaranthaceae, Compositae and Plantago L. The effects of meteorological factors (temperature, humidity, wind speed, rainfall) on pollen production, dispersal and concentration in the atmosphere of Kütahya were observed.