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Pagina 1 a partire dal 535 risultati
Sugar utilization by developing wild type and shrunken-2 maize kernels.
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To characterize the movement of sugars during kernel development in maize, a newly devised in vitro kernel development scheme was utilized. Viable seeds of wild type maize (Zea mays L.) as well as the mutant shrunken-2 (sh2) were found to mature when grown in culture with reducing sugars or sucrose
Stable endosperm cell suspension cultures from wild-type and opaque-2 maize.
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Stable cell suspension cultures have been established from immature endosperms of A69Y wild-type and opaque-2 maize (Zea mays L.). Cultured cells are capable of storage protein (zein) synthesis and accumulation throughout the growth period. Electrophoretic patterns of zeins show, for opaque-2 cells,
Seeds of the Wild Progenitor of Maize Possess Bacteria That Antagonize Foodborne Pathogens.
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Endophytes are microorganisms that inhabit plant tissues without causing disease. Some endophytes help their hosts to combat pathogens. Here we explored the hypothesis that the plant-derived foods consumed by humans and other animals host endophytes that also antagonize foodborne pathogens or
GISHGenomic in situ hybridization reveals cryptic genetic differences between maize and its putative wild progenitor Zea mays subsp. parviglumis.
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The aim of this paper is to test with genomic in situ hybridization the genomic affinities between maize and its putative progenitor Zea mays subsp. parviglumis. Blocking procedures were applied for the purpose of improving discrimination among chromosome regions. Unlabeled genomic DNA from Z. mays
Evolutionary Metabolomics Identifies Substantial Metabolic Divergence between Maize and Its Wild Ancestor, Teosinte.
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Maize (Zea mays subsp mays) was domesticated from its wild ancestor, teosinte (Zea mays subsp parviglumis). Maize's distinct morphology and adaptation to diverse environments required coordinated changes in various metabolic pathways. However, how the metabolome was
Development of wild type, shrunken-1 and shrunken-2 maize kernels grown in vitro.
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Kernels of wild type maize (Zea mays L.) and the mutants shrunken-1 and shrunken-2 developed as much as in vivo when excised at five days post-pollination and grown in culture using existing methods. Mature kernels from culture exhibited their expected phenotypes. Starch, sugar and enzyme levels of
Field trials of calciferol combined with warfarin against wild house-mice (Mus musclus L.).
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A combination of calciferol (vitamin D(2)) and warfarin, each at 0.025% in medium oatmeal bait, failed to control six of seven house-mouse (Mus musculus L.) populations infesting urban and farm buildings. In three further treatments with both calciferol and warfarin at 0.05% in dehusked canary seed
Indole-3-butyric acid (IBA) production in culture medium by wild strain Azospirillum brasilense.
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Some microorganisms found in the soil are able to produce substances which regulate plant growth. In this study, we show the presence of a substance associated with auxin activity, identified as indole-3-butyric acid (IBA), in Azospirillum brasilense UAP 154 growth medium. A. brasilense was grown
Dibenzo[def,p]chrysene transplacental carcinogenesis in wild-type, Cyp1b1 knockout, and CYP1B1 humanized mice.
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The cytochrome P450 (CYP) 1 family is active toward numerous environmental pollutants, including polycyclic aromatic hydrocarbons (PAHs). Utilizing a mouse model, null for Cyp1b1 and expressing human CYP1B1, we tested the hypothesis that hCYP1B1 is important for dibenzo[def,p]chrysene (DBC)
Speciation and domestication in maize and its wild relatives: evidence from the globulin-1 gene.
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The grass genus Zea contains the domesticate maize and several wild taxa indigenous to Central and South America. Here we study the genetic consequences of speciation and domestication in this group by sampling DNA sequences from four taxa-maize (Zea mays ssp. mays), its wild progenitor (Z. mays
Delayed neurotoxicity in the wild mallard duckling caused by the organophosphorus insecticides cyanofenphos and leptophos.
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The susceptibility of wild mallard ducklings to the delayed neurotoxic effect of the neurotoxic organophosphorus insecticides cyanofenphos and leptophos was evaluated following a daily dosing regimen. Ducklings were treated daily with either cyanofenphos or with leptophos at different dose levels
Ethylene-Mediated Programmed Cell Death during Maize Endosperm Development of Wild-Type and shrunken2 Genotypes.
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We characterized the progression of programmed cell death during maize (Zea mays L.) endosperm development of starchy (Su; wild-type) and shrunken2 (sh2) genotypes and tested the involve ment of ethylene in mediating this process. Histological and viability staining demonstrated that endosperm cell
β-Naphthoflavone treatment attenuates neonatal hyperoxic lung injury in wild type and Cyp1a2-knockout mice.
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Exposure to supraphysiological concentrations of oxygen (hyperoxia) leads to bronchopulmonary dysplasia (BPD), one of the most common pulmonary morbidities in preterm neonates, which is more prevalent in males than females. Beta-naphthoflavone (BNF) is protective against hyperoxic lung injury in
Genomic clones of a wild-type allele and a transposable element-induced mutant allele of the sucrose synthase gene of Zea mays L.
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In an attempt to isolate the transposable genetic element Ds from Zea mays L., we cloned DNA fragments hybridizing to a cDNA clone derived from the sucrose synthase gene in a lambda vector (lambda::Zm Sh). The fragments cloned from wild-type and from the Ds-induced mutant sh-m5933 (lambda::Zm
An exo-poly-alpha-D-galacturonosidase, PehB, is required for wild-type virulence of Ralstonia solanacearum.
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Ralstonia solanacearum, which causes bacterial wilt disease of many plant species, produces several extracellular plant cell wall-degrading enzymes that are suspected virulence factors. These include a previously described endopolygalacturonase (PG), PehA, and two exo-PGs. A gene encoding one of the
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