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  • 1
    Electronic Resource
    Electronic Resource
    Reduced chlamydospore formation and enhanced lysis of chlamydospores ofFusarium oxysporum in soil with added urea or ammonium chloride (1986)
    Springer
    Biology and fertility of soils 2 (1986), S. 1-6 
    Details
    ISSN: 1432-0789
    Keywords: Fusarium oxysporum ; Chlamydospore formation and lysis ; Nitrite and ammonia effects
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Geosciences , Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Summary Addition of 0.1% NH4Cl or 0.1% urea to one of two soils tested had little or no effect in one soil, but resulted in fewer chlamydospores ofFusarium oxysporum present after 6 weeks in the other soil. This was due to reduced formation of chlamydospores and, particularly, to enhanced lysis of chlamydospores. The hypothesis that ammonia was the causal factor was tested. Ammonia evolved from NH4Cl and urea in both soils to the same amount. Since the effects of NH4Cl and urea were different in the two soils, it is concluded that ammonia was not responsible for the reduced number of chlamydospores. Possibly nitrite is involved.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00638954
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  • 2
    Electronic Resource
    Electronic Resource
    RETENTION OF ASCORBIC ACID IN RASPBERRIES DURING FREEZING, FROZEN STORAGE, PURÉEING, AND MANUFACTURE INTO VELVA FRUIT (1946)
    Oxford, UK : Blackwell Publishing Ltd
    Journal of food science 11 (1946), S. 0 
    Details
    ISSN: 1750-3841
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition , Process Engineering, Biotechnology, Nutrition Technology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-2621.1946.tb16382.x
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  • 3
    Electronic Resource
    Electronic Resource
    RETENTION OF ASCORBIC ACID IN STRAWBERRIES DURING PROCESSING, FROZEN STORAGE, AND MANUFACTURE OF VELVA FRUIT (1946)
    Oxford, UK : Blackwell Publishing Ltd
    Journal of food science 11 (1946), S. 0 
    Details
    ISSN: 1750-3841
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition , Process Engineering, Biotechnology, Nutrition Technology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-2621.1946.tb16328.x
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  • 4
    Electronic Resource
    Electronic Resource
    Fusarium resistance in Gladiolus: Selection in seedling populations (1997)
    Oxford, UK : Blackwell Publishing Ltd
    Plant breeding 116 (1997), S. 0 
    Details
    ISSN: 1439-0523
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: A test to select Fusarium resistant seedlings of Gladiolus is described. Seedlings of 37 populations, obtained from an incomplete diallel between eight parents with different levels of Fusarium resistance, were used. Significant differences in Fusarium infection between and within populations were detected. Most of the descendants selected had a resistant G. dalenii genotype as one of the parents. The resistance level of the parents was associated with the general combining ability for Fusarium resistance based on the seedling test. Implications for resistance breeding are discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1439-0523.1997.tb00997.x
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  • 5
    Electronic Resource
    Electronic Resource
    Processing of Orange Juice (1941)
    s.l. : American Chemical Society
    Industrial & engineering chemistry 33 (1941), S. 1308-1314 
    Details
    ISSN: 1520-5045
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/ie50382a024
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  • 6
    Electronic Resource
    Electronic Resource
    Determination of Air in Citrus Juices (1940)
    s.l. : American Chemical Society
    Industrial and engineering chemistry 12 (1940), S. 533-534 
    Details
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/ac50149a016
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  • 7
    Electronic Resource
    Electronic Resource
    Ascorbic Acid (1942)
    s.l. : American Chemical Society
    Industrial and engineering chemistry 14 (1942), S. 846-849 
    Details
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/i560111a003
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  • 8
    Electronic Resource
    Electronic Resource
    Screening of Tomato Somaclones for Resistance to Bacterial Canker (Clavibacter michiganensis subsp. michiganensis) (1991)
    Oxford, UK : Blackwell Publishing Ltd
    Plant breeding 107 (1991), S. 0 
    Details
    ISSN: 1439-0523
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: To facilitate testing large numbers of tomato soma-clones for resistance to bacterial canker, a fast screening procedure was developed. Two inoculation methods were investigated, i.e. excision with an infected scalpel of I) one cotyledon of 2-week-old seedlings, and II) the first true leaf of 3-week-old seedlings, followed by applying a drop of inoculum on the wound. Inoculation by method II discriminated well between populations of partially resistant and susceptible tomato genotypes. A criterion for the selection of single, putatively resistant plants, based on rating scores of the severity of wilting symptoms, was proposed and tested with plants of a Lycopersicon peruvianum accession with a relatively high level of resistance to bacterial canker. Progenies of 279 somaclones, derived from tissue explants of the susceptible tomato cultivar ‘Moneymaker’, were evaluated for resistance. The presence of somaclonal variation for morphological characters in these populations was previously shown. However, no differences were detected between the somaclone population and controls in either mean susceptibility or distribution of plants over disease severity categories. Moreover, plants with major increases in resistance were not detected. These results suggest that the potential of somaclonal variation as a source of resistance to bacterial canker may be limited.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1439-0523.1991.tb01206.x
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  • 9
    Electronic Resource
    Electronic Resource
    Nitrite as a factor in the decline of Fusarium oxysporum f. sp. dianthi in soil supplemented with urea or ammonium chloride (1986)
    Springer
    European journal of plant pathology 92 (1986), S. 153-162 
    Details
    ISSN: 1573-8469
    Keywords: Ammonia ; Nitrapyrine
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Description / Table of Contents: Samenvatting Toevoeging van 0.1% ureum of 0.1% NH4Cl verminderde de populatie vanF. oxysporum f. sp.dianthi in een van de twee getoetste gronden. Ammoniak lijkt niet verantwoordelijk voor deze afname, aangezien ammoniak in beide gronden gelijkelijk ontwikkelde na toevoeging van ureum of NH4Cl. Toevoeging van Nitrapyrine tesamen met ureum of NH4Cl aan de ‘actieve’ grond verhoogde de concentratie ammoniak in de grond, maar verlaagde het remmend effect. Toevoeging van nitraat in hoeveelheden die overeenkoment met die welke gemeten worden na volledige omzetting van ureum had geen effect op de populatie vanF. oxysporum f. sp.dianthi. Toevoeging van nitriet in hoeveelheden die overeenkomen met die welke gemeten worden na volledige afbraak van ureum verminderde de populatie wel. In vitro remde nitriet de chlamydosporevorming vanF. oxysporum f. sp.dianthi. Toediening van 0.1% ureum aan de grond gaf een 10 tot 100 maal hogere nitrietaccumulatie in de ‘actieve’ gron dan in de ‘niet-actieve’ grond. Daarom wordt de conclusie getrokken, dat nitriet veeleer dan ammoniak verantwoordelijk is voor de vermindering van de populatie vanF. oxysporum f. sp.dianthi in grond waaraan ammoniak-genererende verbindingen zijn toegevoegd.
    Notes: Abstract Addition of 1 g urea or NH4Cl per kg dry soil (0.1%) reduced the population ofFusarium oxysporum f. sp.dianthi in one of two soils tested. Ammonia does not seem to be the responsible factor since it accumulated similarly in both soils upon addition of NH4Cl or urea. Addition of Nitrapyrine in combination with 0.1% urea or NH4Cl increased ammonia concentrations in soil but decreased the population-declining effect. Addition of nitrate in amounts corresponding to those measured after decomposition of urea in soil had no effect on population development. Addition of nitrite in amounts corresponding to those measured during decomposition of urea in soil decreased the population ofF. oxysporum f. sp.dianthi. In vitro, nitrite inhibited chlamydospore formation. Upon addition of 0.1% urea, nitrite accumulated 10 to 100 times more in the susceptible soil than in the not-susceptible soil. It is concluded that nitrite rather then ammonia is responsible for the decline effect of ammonia-generating compounds on populations ofF. oxysporum f. sp.dianthi in soil.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01999797
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  • 10
    Electronic Resource
    Electronic Resource
    Effect of phytotoxic compounds produced by Clavibacter michiganensis subsp. michiganensis on resistant and susceptible tomato plants (1989)
    Springer
    European journal of plant pathology 95 (1989), S. 107-117 
    Details
    ISSN: 1573-8469
    Keywords: bacterial canker ; Lycopersicon esculentum ; Lycopersicon peruvianum ; virulence ; bioassay ; non-specific toxin
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Description / Table of Contents: Samenvatting Een fytotoxische fractie werd geïsoleerd uit cultuurfiltraat vanClavibacter michiganensis subsp.michiganensis, de veroorzaker van de bacterieverwelkingsziekte bij tomaat. Een eerste karakterisering toonde aan dat deze toxische fractie hoog-moleculaire component(en) bevat, bestaande uit polysacchariden en een gering percentage eiwit. Dit is in overeenstemming met toxines vanC. michiganensis subsp.michiganensis die al eerder beschreven zijn. Deze hoogmoleculaire toxische fractie was in staat verwelking te induceren van stengeltoppen van verschillendeLycopersicon esculentum enL. peruvianum genotypen in een bioassay. Gewichtsverandering van de stengeltoppen, uitgedrukt als percentage ten opzichte van het begingewicht, werd gebruikt als parameter voor verwelking. De toxische fractie reageerde niet-specifiek in de bioassay, want er werd geen verschil gevonden in respons van (partieel) resistente en gevoelige genotypen. Er bleek geen correlatie te zijn tussen de mate van virulentie van verschillende isolaten vanC. michiganensis subsp.michiganensis en de hoeveelheid van de toxische fractie geproduceerd in vitro. Het mogelijke gebruik van deze hoogmoleculaire toxische fractie als selectief agens bij in vitro selectie zal nader onderzocht worden.
    Notes: Abstract A phytotoxic fraction of high molecular weight was isolated from the culture filtrate ofClavibacter michiganensis subsp.michiganensis, the causal agent of bacterial canker of tomato, and partly purified. This high molecular weight fraction consists of sugars and a minor protein moiety and is therefore probably of similar nature to that of the toxin fromC. michiganensis subsp.michiganensis reported earlier in literature. The high molecular weight fraction was albe to induce wilting, the predominant symptom of the disease, as shown in a bioassay with tomato cuttings. However, this wilting reaction turned out to be non-specific in the bioassay, since (partially) resistant and susceptible genotypes responded similarly. No correlation could be found between the degree of virulence of fiveC. michiganensis subsp.michiganensis strains and the amount of the phytotoxic high molecular weight fraction produced in vitro. As the isolated high molecular weight fraction showed a phytotoxic effect on tomato plants it is worthwhile to test its potential for use as a selective agent in in vitro selection.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01997478
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