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  • 1
    Electronic Resource
    Electronic Resource
    A rapid laboratory method for assessing the biological control potential of Penicillium oxalicum against Fusarium wilt of tomato (1997)
    Oxford, UK : Blackwell Science Ltd
    Plant pathology 46 (1997), S. 0 
    Details
    ISSN: 1365-3059
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: A rapid, simple and reliable procedure was developed to evaluate biological control of Fusarium wilt of tomato by Penicillium oxalicum. The method consists in growing tomato plants in flasks with nutrient solution in a growth chamber. Plants were previously treated in the seedbed with a conidial suspension (107 conidia mL−1) of P. oxalicum 7 days before transplanting. Fusarium oxysporum f.sp. lycopersici (race 2) was added to the Hoagland solution just before transplanting. Different concentrations and several isolates of F. oxysporum f.sp. lycopersici were tested. Using this method, plants showed typical symptoms of the disease and the effect of the biocontrol agent was clear. Consumption of nutrient solution was reduced in diseased plants, and this reduction was diminished by treatment with P.oxalicum. Consumption of nutrient solution was correlated with other disease-related parameters (AUDPC, weight of aerial parts, stunting) and was an easy and objective parameter to measure.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1046/j.1365-3059.1997.d01-55.x
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  • 2
    Electronic Resource
    Electronic Resource
    Involvement of resistance induction by Penicillum oxalicum in the biocontrol of tomato wilt (1997)
    Oxford, U.K. and Cambridge, USA : Blackwell Science Ltd
    Plant pathology 46 (1997), S. 0 
    Details
    ISSN: 1365-3059
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Penicillium oxalicum, a biocontrol agent for Fusarium oxysporum f.sp. lycopersici, was tested for its ability to induce resistance against tomato wilt. P. oxalicum and F. oxysporum f.sp. lycopersici were placed at separate sites on tomato plants or in soil, avoiding a direct interaction between the fungi. P. oxalicum induced resistance as expressed by a reduction in disease severity, area under disease progress curve and stunting induced by the pathogen. P. oxalicum colonized the tomato rhizosphere during the experiments but it was not detected inside stems, demonstrating that P. oxalicum and Fusarium oxysporum f.sp. lycopersici remained spatially separated. Biological control was observed both in sensitive and ‘resistant’ cultivars, indicating the role of a general resistance mechanism. In both cultivars P. oxalicum treatment alone did not produce disease symptoms. Therefore P. oxalicum could be a suitable biocontrol agent in cases of cultivar resistance failure. These results suggest that P. oxalicum can trigger defence mechanisms in the plant.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1046/j.1365-3059.1997.d01-204.x
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  • 3
    Electronic Resource
    Electronic Resource
    Biological control of Fusarium oxysporum f. sp. lycopersici (1995)
    Oxford, UK : Blackwell Publishing Ltd
    Plant pathology 44 (1995), S. 0 
    Details
    ISSN: 1365-3059
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Fungi known to produce lytic enzymes were used in an attempt to control wilt of tomato caused by Fusarium oxysporum f. sp. lycopersici (FOL). Some of the fungal species (Penicillium oxalicum, Penicillium purpurogenum and Aspergillus nidulans) damaged hyphae of FOL in vitro and reduced the numbers of microconidia in the soil. Treatments with fungi did not result in a reduction in either chlamydospores of FOL in soil or populations of FOL in the rhizosphere of tomato. P. oxalicum was the most effective agent of biocontrol, and it reduced disease severity in both non-autoclaved (20% decrease) and sterile soil. In sterile soil, P. oxalicum reduced disease with different levels of severity (27% decrease at high levels and 50% decrease at low levels). Disease control by A. nidulans and P purpurogenum was only achieved when disease severity was low in sterile soil (55% and 45%, respectively).
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-3059.1995.tb02750.x
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  • 4
    Electronic Resource
    Electronic Resource
    Biological control of peach twig blight (Monilinia laxa) with Epicoccum nigrum (1994)
    Oxford, UK : Blackwell Publishing Ltd
    Plant pathology 43 (1994), S. 0 
    Details
    ISSN: 1365-3059
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Various preparations of spores and mycelium of the antagonist Epicoccum nigrum, alone or in combination with Captan, were applied in four different field trials to peach trees inoculated with Monilinia laxa, the cause of twig blight. Biocontrol obtained after application of E. nigrum was variable each year, depending on the releative disease severity in the first 2–3 weeks after infection and the climatic conditions. In three out of four trials, treatments with E. nigrum were comparable with Captan in reducing disease severity and combinations of E. nigrum and Captan gave a level of disease suppression similar to that given by the antagonist or chemical alone. In the remaining trial, combinations of E. nigrum and Captan were necessary to obtain successful disease suppression.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-3059.1994.tb01590.x
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  • 5
    Electronic Resource
    Electronic Resource
    Hepatic coccidiosis of the blue whiting, Micromesistius poutassou (Risso), and horse mackerel, Trachurus trachurus (L.), from Galician waters (2001)
    Oxford UK : Blackwell Science Ltd
    Journal of fish diseases 24 (2001), S. 0 
    Details
    ISSN: 1365-2761
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology , Medicine
    Notes: The aetiology, epidemiology and pathology of coccidiosis in commercially-exploited populations of Micromesistius poutassou and Trachurus trachurus from Galician waters were investigated. Sporogonic stages of Goussia clupearum and G. cruciata were found in the liver. Although the descriptive statistics of Goussia infrapopulations and demographic infection values were always higher in M. poutassou than in T. trachurus, parasite distribution was highly skewed for both coccidian species. In both fish species, the number of oöcysts showed a similar cumulative effect as parasite counts increased with increasing length and weight of fish, but did not change with host sex or sexual maturity. Pathological changes in infected liver parenchyma of both species were moderate (in T. trachurus) to severe (in M. poutassou), with greatly reduced livers in the most heavily infected fish. Large areas of liver tissue were replaced with oöcysts. Host response to infection included the formation of a fibrous capsule prior to infiltration by melanin and lymphocytes. Although post-recruit individuals of both fish species apparently tolerate a severe infection, there was statistical evidence of a serious contribution by the parasite to poor body condition in M. poutassou shown by changes in the hepatosomatic and K-Fulton indices and in the length- to-weight relationship.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1046/j.1365-2761.2001.00298.x
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  • 6
    Electronic Resource
    Electronic Resource
    Parasites and zoos
    Amsterdam : Elsevier
    Parasitology Today 10 (1994), S. 357 
    Details
    ISSN: 0169-4758
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Biology , Medicine
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1016/0169-4758(94)90250-X
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  • 7
    Electronic Resource
    Electronic Resource
    Induction of submerged conidiation of the biocontrol agent Penicillium oxalicum (1997)
    Springer
    Applied microbiology and biotechnology 48 (1997), S. 389-392 
    Details
    ISSN: 1432-0614
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Abstract Induction of submerged conidiation of Penicillium oxalicum has been examined using a range of synthetic and complex media and complex media supplemented with by-products of the brewing industry. Only one method (Morton's method), consisting of growth in a glucose/salts-based medium (C:N ratio 62.5, medium A) for 24 h and then transference to the same medium without a nitrogen source (medium B), induced conidiation. Levels of sporulation were significantly (P = 0.05) increased by addition of calcium or poly(ethylene glycol) 6000 to medium B. The optimum age for transference of the mycelium was 24 h and the optimum pH was 6. Calcium was an induction factor when added to medium A (C:N ratio 62.5) of Morton's method. It was concluded that nitrogen depletion and calcium addition to a medium with high C:N ratio are the factors inducing conidiation of P. oxalicum. Maximum levels of conidiation (35 × 106 spores ml−1) were obtained when the nitrogen level in medium A of Morton's method was further reduced (C:N ratio 142.9) and calcium (20 mM) was added. These results are the essential starting point to investigate liquid fermentation systems for the biocontrol agent P. oxalicum.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s002530051068
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  • 8
    Electronic Resource
    Electronic Resource
    Aggregata sagittata n. sp. (Apicomplexa: Aggregatidae), a coccidian parasite from the European flying squid Todarodes sagittatus (Mollusca: Cephalopoda) (2000)
    Springer
    Systematic parasitology 47 (2000), S. 203-206 
    Details
    ISSN: 1573-5192
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Abstract A new species of the coccidian genus Aggregata Frenzel, 1885 (Apicomplexa, Aggregatidae) is described from the digestive tract of Todarodes sagittatus (Lamarck), an ommastrephid squid that lives in temperate waters in the northeastern Atlantic Ocean. Using light microscopy, oöcysts were 225–333 μm in length and 220–323 μm in width. Each oöcyst contained 600–1,000 sporocysts. Sporocysts were 16–18 μm in length and 15–17μm in width, with a smooth surface and thick wall. Each sporocyst contained 4–8 sporozoites each with a length of 11–13 μm. This paper presents the description of a new Aggregata species in a nerito-oceanic flying squid. Moreover, it extends the distribution of Aggregata to oceanic cephalopod host species. A. sagittata represents the third named species in the genus Aggregata in European waters and the seventh worldwide.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1006400619047
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  • 9
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    Bounded phase phenomena in the optically injected laser (2012)
    American Physical Society (APS)
    Details
    Publication Date: 2012-04-19
    Description: Author(s): B. Kelleher, D. Goulding, B. Baselga Pascual, S. P. Hegarty, and G. Huyet Two routes to phase-locking in the optically injected laser system are investigated both involving limit cycles where the phase of the slave laser is unlocked but is nevertheless bounded. We use an experimental phase-resolving technique to unambiguously demonstrate the phenomenon via explicit phasor... [Phys. Rev. E 85, 046212] Published Wed Apr 18, 2012
    Keywords: Chaos and pattern formation
    Print ISSN: 1539-3755
    Electronic ISSN: 1550-2376
    Topics: Physics
    Published by American Physical Society (APS)
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  • 10
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    Study of resonant reactions with radioactive ion beams (2000)
    Elsevier
    Details
    Publication Date: 2000-10-01
    Print ISSN: 0168-583X
    Electronic ISSN: 1872-9584
    Topics: Physics
    Published by Elsevier
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