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  • 1
    Electronic Resource
    Electronic Resource
    Interaction of Proteins With Lipid Headgroups: Lessons from Protein Kinase C (1993)
    Palo Alto, Calif. : Annual Reviews
    Annual Review of Biophysics and Biomolecular Structure 22 (1993), S. 1-25 
    Details
    ISSN: 1056-8700
    Source: Annual Reviews Electronic Back Volume Collection 1932-2001ff
    Topics: Biology , Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1146/annurev.bb.22.060193.000245
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  • 2
    Electronic Resource
    Electronic Resource
    Susceptibility of oat cultivars to groat discoloration: causes and remedies (2003)
    Oxford, UK : Blackwell Publishing Ltd
    Plant breeding 122 (2003), S. 0 
    Details
    ISSN: 1439-0523
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Fungal isolations and fungicide efficacy trials were carried out to determine the possible causes of discoloration in oat groats and potential control measures. Alternaria species and Microdochium nivale were isolated from field samples, and Fusarium poae was found in glasshouse tests. Symptoms could be induced reliably in the field through the use of a mist irrigation system. The cultivar ‘Gerald’ was most resistant followed by ‘Jalna’. Cultivar ‘Image’ was most severely affected by discoloration and ‘Millennium’ was of intermediate susceptibility. None of the 28 fungicide-timing combinations used in the field trials affected the occurrence of discoloured groats. It was concluded that the best strategy for minimizing risk of discoloured groats would be screening new cultivars or breeding material in mist-irrigated field trials for genetically based resistance.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1046/j.1439-0523.2003.00779.x
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  • 3
    Electronic Resource
    Electronic Resource
    The effect of humidity on the expression of partial resistance to powdery mildew in barley (1993)
    Oxford, UK : Blackwell Publishing Ltd
    Plant pathology 42 (1993), S. 0 
    Details
    ISSN: 1365-3059
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Seedling leaves of four cultivars of barley, three of which express partial resistance, were inoculated with powdery mildew (Erysiphe graminis f.sp. hordei) and enclosed in an apparatus which enabled accurate control of humidity, air speed and temperature. Infection frequency was always greater at high humidity (〉95%) than at low humidity (40–50%). Cultivar 7204 (Ethiopian) showed a greater reduction in infection frequency at both 12 and 16°C, and more reduction in biomass per colony at 16°C under low humidity than the other cultivars. The potential for exploiting such differences in barley breeding is discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-3059.1993.tb01513.x
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  • 4
    Electronic Resource
    Electronic Resource
    Characteristics of strains of Septoria nodorum adapted to wheat or to barley (1991)
    Oxford, UK : Blackwell Publishing Ltd
    Plant pathology 40 (1991), S. 0 
    Details
    ISSN: 1365-3059
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Sixty-four strains of Septoria which had been isolated from a range of hosts at different locations and in different years were characterized for their adaptation to wheat or barley, growth at near-maximum temperature, fluorescence, colony morphology, conidial (pycnidiospore) length and hexokinase and alkaline phosphatase isozymes. For each character except conidial length, the strains could be divided into two or three discrete groups. The variation in these six characters was strongly associated, such that 60 strains could be classified into two groups, designated W-type and B-type. W-type strains are adapted to wheat, produce large colonies at 31 C, fluoresce, produce brown-pigmented colonies, and have fast isozymes. B-type strains are adapted to barley, produce small colonies at 31 C, do not fluoresce, produce pink-pigmented colonies, and have slow isozymes. A few strains differed from these norms in one of the six characters, but only one showed an atypical host adaptation. The four unclassified strains differed from W- or B-type in two or more characters. The many differences between the W- and B-types suggest they are genetically distinct populations within Septoria nodorum.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-3059.1991.tb02418.x
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  • 5
    Electronic Resource
    Electronic Resource
    Detection of components of partial resistance to mildew (Erysiphe graminis f.sp. hordei) incorporated into advanced breeding lines of barley using measurement of fungal cell wall sterol (1990)
    Oxford, UK : Blackwell Publishing Ltd
    Plant pathology 39 (1990), S. 0 
    Details
    ISSN: 1365-3059
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Characters for partial resistance to mildew (Erysiphe graminis f.sp. hordei) derived from primitive barley lines were tested and found to have been transmitted to F9 progeny of crosses with the susceptible cultivar Golden Promise with varying degrees of efficiency, and putative transgressive segregation was observed. Derived sterol extracts from mildew cell walls were used, in conjunction with infection frequency data, to quantify the mildew present, and this sterol was characterized as being of MW 470, probably (3.beta)-ergosta-5,24(28)dienol (C31.H54.0.SI SILANE).
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-3059.1990.tb02539.x
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  • 6
    Electronic Resource
    Electronic Resource
    Variation for isozymes and double-stranded RNA among isolates of Puccinia striiformis and two other cereal rusts (1985)
    Oxford, UK : Blackwell Publishing Ltd
    Plant pathology 34 (1985), S. 0 
    Details
    ISSN: 1365-3059
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Gel electrophoresis was used to examine the variation in isozymes and dsRNA within and between the rust species Puccinia striiformis, P. recondita and P. hordei. No differences in isozyme phenotype were found among 29 diverse isolates of the wheat-attacking form of P. striiformis (WYR). Smaller numbers of isolates of the barley-attacking form (BYR) of P. recondita and of P. hordei showed similar intra-group uniformity. There were major differences in isozyme phenotypes between the three species, while WYR and BYR differed for two of 12 enzymes. Double-stranded RNA was detected in each species and in all 26 isolates examined. For WYR and BYR, all isolates within each group had the same or a similar phenotype. In contrast, each isolate of P. recondita and P. hordei had a unique phenotype. There were differences in dsRNA phenotypes both between the three species and between WYR and BYR.The uniformity of these rust populations and species for isozyme phenotype is contrasted with their variability in pathogenicity and with the variability in isozymes encountered in higher organisms. Uniformity may result from a feature of the biology of the rust species and populations examined, or from the relative homogeneity of the environment of biotrophic pathogens. Consistent differences in isozyme and dsRNA phenotype between the WYR and BYR isolates of P. striiformis indicate that these are two discrete populations, supporting the view that they should be recognized as f.sp. tritici and f.sp. hordei, respectively.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-3059.1985.tb01355.x
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  • 7
    Electronic Resource
    Electronic Resource
    Measuring the sterol content of barley leaves infected with powdery mildew as a means of assessing partial resistance to Erysiphe graminis f.sp. hordei (1989)
    Oxford, UK : Blackwell Publishing Ltd
    Plant pathology 38 (1989), S. 0 
    Details
    ISSN: 1365-3059
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Barley leaf segments of several partially resistant cultivars were inoculated with different strains and combinations of strains of Erysiphe graminis. Infection level was assessed by counting colony number, by measuring sporulating area using an image analyser, and by extracting and quantifying sterols. Good correlations were obtained between data from all three methods. One cultivar contained less sterol than expected from the number of colonies present but some of the resistance in that cultivar was known to be due to reduced colony size. Image analysis was unable to discern the reduced colony size component of resistance. Scanning electron microscopy revealed that single colonies may originate from more than one conidial infection. Sterol analysis was the most representative method of comparing the reaction of diverse host genotypes to mildew infection.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-3059.1989.tb01448.x
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  • 8
    Electronic Resource
    Electronic Resource
    Somatic recombination in Rhynchosporium secalis (1989)
    Oxford, UK : Blackwell Publishing Ltd
    Plant pathology 38 (1989), S. 0 
    Details
    ISSN: 1365-3059
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Drug-resistant mutants were induced in strains of Rhynchosporium secalis. Two mutants resistant to hygromycin-B and 5-fluorouracil, respectively, were stable and easily selected in culture. Mixtures of the two mutants failed to yield any recombinants, whether under selection pressure or not, on agar and on barley leaves. After protoplast production and fusion, followed by selection on media containing both drugs, two recombinants were isolated. Single-spore derivatives expressed the drug resistances of both parental strains.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-3059.1989.tb01429.x
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  • 9
    Electronic Resource
    Electronic Resource
    Temporary partial breakdown of mlo-resistance in spring barley by sudden relief of soil water-stress under field conditions: the effects of genetic background and mlo allele (1998)
    Oxford, U.K. and Cambridge, USA : Blackwell Science Ltd
    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: This study, carried out under field conditions, assessed the extent to which temporary breakdown of mlo-resistance, following relief of water-stress, was determined by genetic background and mlo allele. Commercial barley cultivars expressing the mlo gene for resistance to powdery mildew (Erysiphe graminis (Blumeria graminis) f.sp. hordei) were tested as well as doubled haploid progeny from spring barley genotypes, a proportion of which were sown in the field in two successive years. Plants were protected from natural rain by a mobile rain shelter and either watered by trickle-irrigation or allowed to dry. Percentage mildew infection resulting from natural inoculum was recorded and the doubled haploid genotypes were classified as resistant, intermediate or susceptible on the basis of their control (watered) treatment scores. In each of the three designated classes, particular genotypes developed infection levels, following relief of water-stress, that were higher than those observed on the well-watered controls. This was found not to be related to the mlo allele as there was no significant difference between the increases observed on resistant plants carrying mlo9 and resistant plants carrying mlo11. Differences in the degree of breakdown of resistance were attributed to genetic background rather than to the specific mlo allele.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1046/j.1365-3059.1998.00261.x
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  • 10
    Electronic Resource
    Electronic Resource
    Attempted somatic hybridization of Puccinia striiformis f. sp. tritici and P. striiformis f. sp. hordei (1986)
    Oxford, UK : Blackwell Publishing Ltd
    Plant pathology 35 (1986), S. 0 
    Details
    ISSN: 1365-3059
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Attempts were made to produce somatic hybrids between isolates of Puccinia striiformis f. sp. tritici and f. sp. hordei. A mixed infection was produced on a common susceptible barley host, Fong Tien, using white-spored isolates of P. striiformis f. sp. tritici and yellow-spored isolates off. sp. hordei. Selection was made for non-parental spore colour on selective wheat and barley hosts, and variants thus isolated were analysed for virulence markers, and for isozyme and double-stranded RNA (dsRNA) markers, all of which clearly differentiated the parental isolates. Two white-spored (non-parental) isolates were found on the selective barley host which otherwise resembled the parental f. sp. hordei isolate in virulence, isozyme and dsRNA markers. The most likely explanation of the origin of these isolates is mutation to white spore colour in the f. sp. hordei isolate.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-3059.1986.tb01988.x
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