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... Evaluation of toxic residue effect of Thiodan on Apis mellifera L. with regard to different application surfaces A new method for the laboratory testing of toxic effects of pesticide residues on the honeybee is described which permits to evaluate the influence of the leafsurface of different cultivated plants and other testing substrates. The newly designed device facilitates the simulation of spr ...
... Ubiquitin is a ubiquitous protein involved in targeting proteins for degradation. Maize pollen was previously reported (Callis and Bedinger 1994) to show extremely low levels of ubiquitin monomer, and developmental significance was attributed to this surprising feature of maize pollen. However, we had previously shown (Muschietti et al. 1994) that tomato pollen had high levels of ubiquitin monomer ...
... The influence of low application rates of chlorsulfuron on the growth and reproduction of four taxonomically diverse plant species (canola, smartweed, soybean, and sunflower) were examined. Exposures examined ranged from 1 X 10(-3) to 8 X 10-(3) of the recommended field rates for cereal crops and were approximately 1,000 times less than the highest exposure recommended by the U.S. Environmental Pr ...
Helianthus annuus; Brassica napus; measurement; chemical degradation; dose response; jasmonic acid; gene expression; Triticum aestivum; Nicotiana tabacum; esters; stereochemistry; enzyme activity; chemical structure; seed germination; transgenic plants; cotyledons; proteinase inhibitors; reporter genes; chemical constituents of plants; chlorophyll; beta-glucuronidase
Abstract:
... The importance of the two chiral centers at C-3 and C-7 in the molecular structure of jasmonic acid in plant responses was investigated. We separated methyl jasmonate (MeJA) into (3R)- and (3S)-isomers with a fixed stereochemistry at C-3, but epimerization at C-7 is possible. The four isomers of the nonepimerizable analog 7-methyl MeJA were synthesized. These six esters and their corresponding aci ...
... A protocol is described, for the rapid screening of a large number of putative transgenic shoots. Genomic DNA is isolated and screened by PCR. To validate the purity of the DNA, PCR amplification is done with primers homologous to an endogenous gene. Multiplex PCR is used to screen for the transgenic shoots with two sets of primers, one set against the endogenous gene (internal control) and the ot ...
... Summer fallow is commonly used to stabilize winter wheat (Triticum aestivum L.) production in the Central Great Plains, but summer fallow results in soil degradation, limits farm productivity and profitability, and stores soil water inefficiently. The objectives of this study were to quantify the production and economic consequences of replacing summer fallow with spring-planted crops on the subse ...
... Crop diversification and crop sequencing can influence plant disease risk in cropping systems. The objective of this research was to determine the effect of 10 previous crops on leaf spot diseases of barley (Hordeum vulgare L.) and hard red spring wheat (Triticum aestivum L.). Barley and spring wheat were direct-seeded (no till) in the crop residue of 10 crops {barley, canola (Brassica napus L.), ...
... Cattle (Bos taurus) producers can replace a part of the traditional diet of barley (Hordeum vulgare L.) grain/silage with sunflower (Helianthus annus L.) seeds or canola meal (Brassica napus L.)/oil to enhance conjugated linoleic acids (CLA) content in milk and meat for its positive health benefits. The objective of this study is to investigate the effects of feeding sunflower or canola to finishi ...
... The plasma membrane is most likely the major target for sensing of aluminium (Al), leading to inhibition of plant root-growth. As a result of high external Al, alterations in plasma membrane composition may be expected in order to maintain its properties. As sphingolipids are characteristic components of this membrane, their involvement in membrane adjustment to increased Al concentrations was inv ...
... BACKGROUND AND AIMS: The root apical meristems (RAM) of flowering plant roots are organized into recognizable pattern types. At present, there are no known ecological or physiological benefits to having one RAM organization type over another. Although there are phylogenetic distribution patterns in plant groups, the possible evolutionary advantages of different RAM organization patterns are not un ...
... In the present study we compared the changes in chlorophyllase (Chlase) activity and chlorophyll content during leaf senescence in eleven plant species, using an improved Chlase activity assay. Parsley (Petroselinum sativum L.), vinca (Vinca rosea L.), squash (Cucurbita pepo L.), tomato (Lycopersicon esculentum L.), canola (Brassica napus L.), tobacco (Nicotia ...
Brassica napus; Helianthus annuus; energy; leaves; light intensity; photosynthesis; photosynthetically active radiation; starch; surface area; thylakoids; ultraviolet radiation; New Hampshire
Abstract:
... Electromagnetic radiation (EMR) in the 400-700 nm bandwidth of photosynthetically active radiation (PAR) has been established as an important source of energy for photosynthesis and environmental signals regulating many aspects of green-plant life. Above-ambient levels of UV-B radiation (290-320 nm) under high-PAR conditions have been shown to elicit responses in chloroplasts of Brassica napus sim ...
... The efficiency with which developing sunflower embryos convert substrates into seed storage reserves was determined by labeling embryos with [U-¹⁴C₆]glucose or [U-¹⁴C₅]glutamine and measuring their conversion to CO₂, oil, protein and other biomass compounds. The average carbon conversion efficiency was 50%, which contrasts with a value of over 80% previously observed in Brassica napus embryos ( Go ...
... Weed management is evolving to include cultural tactics that reduce weed populations. This study near Brookings, SD, evaluated the effect of crop sequence and tillage on seedling emergence of common sunflower across years. In the third and fourth years of the study, seedling density was sevenfold greater after 2 yr of soybean with tillage compared with a 2-yr sequence of canola and winter wheat wi ...
... The 5S intergenic spacers were amplified using a common pair of primers and sequenced from four species (Brassica napus, Zea mays, Helianthus annuus, and Glycine max). Crop-specific assays were developed from primers designed from the spacers and tested to amplify corresponding DNAs in both conventional end-point and real-time polymerase chain reactions (PCRs). The high copy numbers of the 5S DNA ...
... Microfungi of the genus Alternaria are ubiquitous pathogens and saprophytes. Many species of the genus Alternaria commonly cause spoilage of various food crops in the field or post-harvest decay. Due to their growth even at low temperatures, they are also responsible for spoilage of these commodities during refrigerated transport and storage. Several Alternaria species are known producers of toxic ...
... Introduction: The quantity and composition of seed oil affects seed viability and storability and hence the value of a species as a resource for nutrition and plant conservation. Supercritical fluid extraction with carbon dioxide (SFE-CO₂) offers a rapid, environmentally friendly alternative to traditional solvent extraction.Objective: To develop a method using SFE-CO₂ to quantify the seed oil con ...
... Long term flux measurements of different crop species are necessary to improve our understanding of management and climate effects on carbon flux variability as well as cropland potential in terrestrial carbon sequestration. The main objectives of this study were to analyse the seasonal dynamics of CO₂ fluxes and to establish the effects of climate and cropland management on the annual carbon bala ...
... Using Life Cycle Assessment (LCA) the fossil energy benefits and avoided global warming emissions have been evaluated for the EU Biofuels goals in Spain. The Biofuels considered are cereal ethanol, biodiesel from residual oils, and from palm, sunflower, soybeans and rapeseed vegetable oils. Our findings are that the source of the cereal and vegetable oil influences the efficacy of the Biofuels and ...
... Solar radiation intercepted during grain filling affects growth of grain crops. Its effects on oil fatty acid composition have not been investigated. The objective of this work was to investigate the effect of intercepted solar radiation per plant on oil fatty acid composition in four crops. An experiment including a cultivar of soybean, maize and sunflower was sown at Balcarce, Argentina, during ...
Brassica napus; Helianthus annuus; Hordeum vulgare; Pisum sativum; Triticum aestivum; Vicia faba; air temperature; barley; beans; biomass; canola; carbon dioxide; climate change; crops; detectors; gas chromatography; gas emissions; gas exchange; greenhouse effect; growth chambers; ionization; leaf area; leaves; methane; peas; plant growth; stems; transpiration; ultraviolet radiation; water stress; water use efficiency; wheat
Abstract:
... We examined the effects of temperature, ultraviolet-B (UVB) radiation and watering regime on aerobic methane (CH₄) emission from six crops-faba bean, sunflower, pea, canola, barley and wheat. Plants were grown in controlled-environment growth chambers under two temperature regimes (24/20 and 30/26°C), three levels of UVB radiation [0 (zero), 5 (ambient) and 10 (enhanced) kJ m⁻² d⁻¹] and two wateri ...
... The accession of Hungary to the European Union is likely to result in the intensification of arable crop cultivation. As a result of market forces and rural development measures, small parcels of land will be consolidated into larger fields. It is also likely that the area of maize and oilseed rape, and to a lesser extent that of sunflower, will increase at the expense of cereals. Abandoned land, ...
... The fatty acid (FA) composition of oil crops is of some importance under technological as well as under nutritional aspects. The influence of temperature on this parameter in rapeseed, soybeans and sunflowers was investigated under practical agricultural conditions, whereby varietal variations were taken into account. The analysed plant material originated from variety testing trials located in di ...
... Kerman Province is a major agricultural centre in south‐eastern Iran and an increase in agricultural activities results in an increase in disease. We report phytoplasmal infections in Iran of five plant species; spinach (Spinacia oleracea L.), sunflower (Helianthus annuus L.), canola (Brassica napus L.), cucumber (Cucumis sativus L.) and Aegean wallflower (Erysimum cheiri (L.) Crantz; Family Brass ...
... Salinity level may affect early development of biofuel feedstock crops. The biofuel feedstock crops canola (Brassica napus L.), sorghum [Sorghum bicolor (L.) Moench], and sunflower (Helianthus annuus L.); and the potential feedstock crop sweet corn (Zea mays L.) were planted in media in pots and treated with aqueous solutions of 0, 0.1, 0.5 and 1.0 M NaCl once at: 1) planting; 2) 7-10 days after p ...
... Brown patches of the size from several square metres to hectares or individual dying plants appeared in otherwise green stands. Affected plants wilt and ripen sooner than healthy ones, causing them to have smaller seeds or none at all in the central part of the heads. Under extreme conditions the plants wilt and die in early summer when they are less than 50 cm high. No infective agent was found a ...
Helianthus annuus; energy crops; European Union; crop yield; Brassica napus; Hibiscus cannabinus; rapeseed; biogeochemical cycles; Cannabis sativa; kenaf; production technology; bioenergy; traditional farming; hemp; Brassica carinata; energy; disease control; soil; pests; biomass production; crop rotation; land productivity; power plants
Abstract:
... The area under energy crops has increased tenfold over the last 10 years, and there is large consensus that the demand for energy crops will further increase rapidly to cover several millions of hectares in the near future. Information about rotational systems and effects of energy crops should be therefore given top priority. Literature is poor and fragmentary on this topic, especially about rota ...
... Branched broomrape (Orobanche ramosa L.) is a chlorophyll-lacking, root parasitic plant that infects many crops and wild species (2). Plants are densely hairy with minute, glandular hairs, particularly on flowers and upper stems. Stems are erect, often branched just above the ground, and brown to straw yellow. Leaves are sparse, triangular, dark brown or purple, and arranged alternately mainly nea ...
Brassica juncea; Brassica napus; Helianthus annuus; Hordeum vulgare; Linum usitatissimum; canola; carbon footprint; farming systems; fertilizer rates; field crops; flax; grain yield; greenhouse gas emissions; greenhouse gases; growing season; nitrogen fertilizers; nutrient use efficiency; oilseed crops; pesticides; soil minerals; spring barley; stubble; system boundary; Saskatchewan
Abstract:
... PURPOSE: Carbon footprint of field crops can be lowered through improved cropping practices. The objective of this study was to determine the carbon footprint of spring barley (Hordeum vulgare L.) in relation to various preceding oilseed crops that were fertilized at various rates of inorganic N the previous years. System boundary was from cradle-to-farm gate. MATERIALS AND METHODS: Canola-quality ...
... The present study provides information about the comparison of mechanical behaviour of selected oil bearing crops namely rapeseeds (Brassica napus L.), sunflower seeds (Helianthus annus L.) and jatropha seeds (Jatropha curcas L.) under compression loading. In this research, the compression device ZDM 50 with a chart recorder and a pressing vessel with diameter 100 mm were used to determine the rel ...
... The polyphagous pathogen Sclerotinia sclerotiorum (Lib) de Bary causes significant diseases of sunflower and oil-seed rape while Diaporthe wilt, invoked by the pathogen Diaporthe (Phomopsis) helianthi Munt-Cvet. et al., is another important disease of sunflower in Slovakia. Since 2001 we have identified S. sclerotiorum on Iva xanthiifolia Nutt. in three locations and the infestation of I. xa ...
... Cropping systems in farmland areas of Iran are characterized by continuous cultivation of crops with consumption of chemical fertilizers leading to serious soil erosion and fertility decline. Information regarding the simultaneous evaluation of crop rotation and fertilization on the canola is lacking. Hence, field experiments were conducted during 2007–2010 using split–split plot design. Three cro ...
... The main aim of this study was to determine antioxidant properties and antibacterial activity of monofloral bee pollen samples to pathogenic bacteria. These samples were collected in different localities in Slovakia. The antioxidant properties of examined plant species were different and decreasing in the following order: Brassica napus subsp. napus L > Papaver somniferum L. > Helianthus annuus L. ...
... Under the influence of pollutants, enzyme activities in plant–microbe–soil systems undergo changes of great importance in predicting soil–plant–microbe interactions, regulation of metal and nutrient uptake, and, ultimately, improvement of soil health and fertility. We evaluated the influence of As on soil enzyme activities and the effectiveness of five field crops for As phytoextraction. The initi ...
... Environmental temperature directly influences the lipid profile produced by oilseeds. If growing temperatures increase, as is predicted by current models, the precise profile of lipids produced are likely to change. This paper develops models to predict lipid profiles as a function of growing temperature. Data relating to lipid profiles of soybean (Glycine max), spring canola (Brassica napus), spr ...
Brassica napus; Helianthus annuus; correlation; energy crops; gas chromatography-mass spectrometry; high performance liquid chromatography; insecticides; metazachlor; oxyfluorfen; quinmerac; quizalofop; runoff; soil; solid phase extraction
Abstract:
... QuEChERS and solid phase extraction (SPE) methods were applied for determining four herbicides (metazachlor, oxyfluorfen, quizalofop-p-ethyl, quinmerac) and one insecticide (α(±)-cypermethrin) in runoff water, soil, sunflower and oilseed rape plant matrices. Determination was performed using gas chromatography mass spectrometry (GC-MS), whereas high-pressure liquid chromatography mass spectrometry ...
Brassica napus; Glycine max; Helianthus annuus; Sorghum bicolor; Triticum aestivum; Zea mays; agronomy; biomass; canola; canopy; corn; cropping sequence; fallow; feed grains; flowering; genetic improvement; grain sorghum; grain yield; income; leaf area index; production functions; semiarid zones; soybeans; subhumid zones; water supply; water use efficiency; winter wheat
Abstract:
... Water supply frequently limits crop yield in semiarid cropping systems; water deficits can restrict yields in drought-affected subhumid regions. In semiarid wheat (Triticum aestivum L.)-based cropping systems, replacing an uncropped fallow period with a crop can increase precipitation use efficiency but reduce wheat productivity. Our objective was to analyze crop sequence and environmental effects ...
... The Better Fertiliser Decision for Crops (BFDC) National Database holds historic data for 356 potassium (K) fertiliser rate experiments (431 treatment series) for different rain-fed grain crops and soil types across Australia. Bicarbonate-extractable K (Colwell soil-test K) is the most extensively used soil test reported in the database. Data are available for several crop species grown on a range ...
... Wild bees (Apiformes) were studied in 4 crop fields and 8 refuge habitats for 2 - 5 years in agricultural landscapes in the Pleven and Plovdiv regions of Bulgaria. In total, 233 bee species were recorded. Bee forage plants visited by the honey bee and wild Apiformes are listed for each refuge habitat. Species composition is given for individual habitats, including fields of alfalfa (Medicago sativ ...
... The present work provides information regarding the statistical relationships among the palynological characteristics, sugars (fructose, glucose, sucrose, melezitose and maltose), moisture content and sugar ratios (F+G, F/G and G/W) of 136 different honey types (including bramble, chestnut, eucalyptus, heather, acacia, lime, rape, sunflower and honeydew). Results of the statistical analyses (multi ...