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  • 1
    Electronic Resource
    Electronic Resource
    Revisiting Putative Functional Properties of the Plasmodium falciparum Pf155/RESA Protein Using Genetically Engineered Parasites (2005)
    Oxford, UK : Blackwell Science Inc
    The @journal of eukaryotic microbiology 52 (2005), S. 0 
    Details
    ISSN: 1550-7408
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: Pf155/RESA (Ring Infected Erythrocyte Surface Antigen), is a Plasmodium falciparum protein discharged by the dense granules of merozoites during invasion and exported to the inner face of the erythrocyte membrane, where it interacts with spectrin in the young stages. Chromosome 1 subtelomeric deletion, eliminating amongst others the resa gene, may occur during adaptation of parasite isolates to in vitro culture. This is accompanied by erythrocyte membrane modifications of the red blood cell, such as increased adhesion and effect on membrane rigidity. It has been proposed that RESA was likely to contribute to these functional and rheological modifications. To assess this, we have constructed resa knock-out parasites in the FUP/CB strain. This results in negativating the erythrocyte membrane immunofluorescence of glutaraldehyde-fixed red blood cells (EMIF), indicating that RESA is critical for EMIF reactivity of hyperimmune human sera. Phenotypic and functional analysis of resa k.o. parasites indicated that loss of RESA expression neither affects membrane rigidity nor CD36 binding under flow conditions. Furthermore, infection of Saimiri sciureus monkeys showed that resa gene deletion does not account on its own for the greater adaptation and parasite virulence in this model.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1550-7408.2005.05202003_3_9.x
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  • 2
    Electronic Resource
    Electronic Resource
    Studies on dispersal of Septoria tritici pycnidiospores in wheat–clover intercrops (1998)
    Oxford, U.K. and Cambridge, USA : Blackwell Publishers
    Plant pathology 47 (1998), S. 0 
    Details
    ISSN: 1365-3059
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Four experiments studied the effects of a clover understorey on pycnidiospore dispersal of Septoria tritici in a wheat–clover intercrop under simulated rain. Clover significantly reduced the dispersal of spores in a horizontal direction by 33% at a distance of 15 cm from a line inoculum source compared with a wheat monocrop. The clover also reduced the vertical movement of spores from infected leaves at the base of wheat plants by an average of 63% compared to the monocrop, and this suggests that the main movement of spores was from the base upwards. Splash experiments using blue colour marker showed the vertical decline of splash and the number of drops per cm2 with height caught on paper adjacent to trays of clover was described by the exponential decline model. The effect of clover in reducing vertical splash approached an asymptote as the leaf area index of the understorey increased. Simulated rain-splash increased the level of disease on the flag leaf and, in one experiment, there was a significant interaction between rain-splash and clover in reducing the number of lesions on the flag leaf. The level of disease resulting from one splash event was low, indicating that subsequent pathogen multiplication is probably required to bring about high severities of disease.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1046/j.1365-3059.1998.00200.x
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  • 3
    Electronic Resource
    Electronic Resource
    Evidence for two independent pathways in the stimulation of steroidogenesis by luteinizing hormone involving chloride channels and cyclic AMP
    Amsterdam : Elsevier
    FEBS Letters 261 (1990), S. 402-404 
    Details
    ISSN: 0014-5793
    Keywords: Calcium ; Chloride channel ; Cyclic AMP ; Leydig cell ; Luteinizing hormone ; Steroidogenesis
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Biology , Chemistry and Pharmacology , Physics
    Type of Medium: Electronic Resource
    URL: http://linkinghub.elsevier.com/retrieve/pii/0014-5793(90)80602-F
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  • 4
    Electronic Resource
    Electronic Resource
    NEW OR UNUSUAL RECORDS: A seedling blight of barley caused by Septoria nodorum (1983)
    Oxford, UK : Blackwell Publishing Ltd
    Plant pathology 32 (1983), S. 0 
    Details
    ISSN: 1365-3059
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-3059.1983.tb01322.x
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  • 5
    Electronic Resource
    Electronic Resource
    A Field Inoculation Method for Septoria tritici and Septoria nodorum (1970)
    Oxford, UK : Blackwell Publishing Ltd
    Plant pathology 19 (1970), S. 0 
    Details
    ISSN: 1365-3059
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: A method is described, using a Czapek Dox V-8 agar and continuous irradiation with near-ultraviolet light, which enables large numbers of spores of Septoria tritici and Septoria nodorum to be produced rapidly and also allows easy identification of the two pathogens by their colony morphology. Also, a simple field inoculation method is described which has proved successful both in experiments involving different inoculum concentrations and for the screening of spring and winter wheat cultivars for their reactions against both pathogens.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-3059.1970.tb00983.x
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  • 6
    Electronic Resource
    Electronic Resource
    Response of wheat and barley isolates of Septoria nodorum to passage through barley and wheat cultivars (1982)
    Oxford, UK : Blackwell Publishing Ltd
    Plant pathology 31 (1982), S. 0 
    Details
    ISSN: 1365-3059
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: A single-spore wheat isolate of S. nodorum was passaged once through barley and a barley isolate passaged once through wheat. Reisolations from barley leaves were designated as either ‘original-type wheat’ (OTW) and resembled the wheat isolate used for inoculations in morphology, or ‘sector-type barley’ (STB) resembling the known morphology of barley isolates. Reisolations from wheat were similarly designated either OTB or STW. Sub-cultures of STB were significantly more pathogenic to barley in a glasshouse experiment than OTW, and vice versa. Similarly STW was significantly more pathogenic to wheat than OTB, and vice versa.A single-spore wheat isolate was also passaged 0, 1, 2, 3 or 4 times through barley and a barley isolate passaged similarly through wheat. Disease assessment and yield data from a field experiment showed that the pathogenicity of the passaged wheat isolate remained largely unaltered from that of the original isolate. However, the barley isolate responded after the third wheat passage by causing significantly less disease and significantly higher yields in barley than the unpassaged isolate; conversely, on wheat, disease levels significantly increased and yield slgnficantly decreased after the second wheat passage.Data obtained are discussed in the context of cultural observations made on colony morphology during host passage sequences and possible genetic mechanisms responsible.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-3059.1982.tb01284.x
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  • 7
    Electronic Resource
    Electronic Resource
    Insensitivity of Botrytis cinerea to iprodione, procymidone and vinclozolin and their uptake by the fungus (1979)
    Oxford, UK : Blackwell Publishing Ltd
    Plant pathology 28 (1979), S. 0 
    Details
    ISSN: 1365-3059
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: An isolate of Botrytis cinerea Pers. ex Fr. insensitive to vinclozolin, procymidone and iprodione was obtained from strawberries which had been inoculated with a benomyl-insensitive isolate of the pathogen and sprayed with iprodione. This isolate maintained its insensitivity to benomyl and also showed resistance to quintozene and dicloran. Tests on detached strawberry fruits showed that the iprodione-insensitive isolate was as virulent as a sensitive isolate. No difference was found in the amounts of the fungicides taken up by the insensitive and sensitive isolates of the fungus.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-3059.1979.tb02926.x
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  • 8
    Electronic Resource
    Electronic Resource
    Effect of temperature on head blight of wheat caused by Fusarium culmorum and F. graminearum (2005)
    Oxford, UK : Blackwell Science Ltd
    Plant pathology 54 (2005), S. 0 
    Details
    ISSN: 1365-3059
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: The effect of small temperature differentials (16 vs. 20°C) on the pathogenicity of deoxynivalenol producing single isolates of Fusarium culmorum and F. graminearum and on the fusarium head blight (FHB) response of eight wheat cultivars was examined. Fusarium culmorum inoculation caused greater visual disease symptoms at 20°C than at 16°C, both overall and on an individual cultivar basis (overall AUDPC = 13·5 and 9·6, respectively) (P 〈 0·05). In contrast, F. graminearum inoculation caused greater overall visual disease symptoms at 16°C than at 20°C, both overall and at the individual cultivar level (overall AUDPC = 12·8 and 10·9, respectively) (P 〈 0·05). Results showed both F. culmorum and F. graminearum inoculations caused a greater loss in yield at 20°C (54·3 and 46·9% relative 1000-grain weight, respectively) compared with 16°C (73·3 and 66·9% relative 1000-grain weight, respectively) (P 〈 0·05). Fusarium culmorum-inoculated heads contained similar amounts of fungal DNA at both 16 and 20°C (1·9 and 1·7 ng mg−1 of plant material, respectively) (not significant), while for F. graminearum inoculation, plants contained higher amounts of fungal DNA at 20°C (2·0 and 1·0 ng mg−1 of plant material, respectively) (P 〈 0·05). Overall, there was a significant negative correlation between AUDPC and percentage relative 1000-grain weight at both 16 and 20°C (r =−0·693 and −0·794, respectively, P 〈 0·01).
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-3059.2005.01157.x
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  • 9
    Electronic Resource
    Electronic Resource
    HEAO 1 observations of high-energy X rays from 3C273 (1979)
    [s.l.] : Nature Publishing Group
    Nature 278 (1979), S. 234-235 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] The present observations were made with the 13-180 keV slat collimated detectors of the high energy X-ray and low energy ?-ray (A4) experiment on the HEAO 1 satellite7. These detectors each have areas of -100cm2 and fields of view of lx20 (FWHM). The narrow slats intersect on the +Y axis and are ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/278234a0
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  • 10
    Electronic Resource
    Electronic Resource
    Control of Steroidogenesis in Leydig Cells: Roles of Ca2+ and Lipoxygenase Products in LH and LHRH Agonist Action (1984)
    Oxford, UK : Blackwell Publishing Ltd
    Annals of the New York Academy of Sciences 438 (1984), S. 0 
    Details
    ISSN: 1749-6632
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Natural Sciences in General
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1749-6632.1984.tb38292.x
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