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  • 1
    Electronic Resource
    Electronic Resource
    Changes in content of sterols, alkaloids, and phenols in flue-cured tobacco during conditions favoring infestation by molds (1969)
    s.l. : American Chemical Society
    Journal of agricultural and food chemistry 17 (1969), S. 331-334 
    Details
    ISSN: 1520-5118
    Source: ACS Legacy Archives
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition , Process Engineering, Biotechnology, Nutrition Technology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/jf60162a011
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Effects of curing on polyamine content of leaves of Nicotiana tabacum L. genotypes with different alkaloids levels (1985)
    s.l. : American Chemical Society
    Journal of agricultural and food chemistry 33 (1985), S. 1182-1185 
    Details
    ISSN: 1520-5118
    Source: ACS Legacy Archives
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition , Process Engineering, Biotechnology, Nutrition Technology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/jf00066a040
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Morphological and Physiological Effects of Maleic Hydrazide on Tobacco (1974)
    Oxford, UK : Blackwell Publishing Ltd
    Physiologia plantarum 32 (1974), S. 0 
    Details
    ISSN: 1399-3054
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: Tobacco plants (Nicotiana tabacum cv. Burley 21) were cultured in the greenhouse to the 18-leaf stage. The apical meristem was removed and subsequent axillary bud growth was removed by hand (controls) or axillary bud development was inhibited by application of maleic hydrazide. Compared with the controls, maleic hydrazide treated plants had a decreased stem diameter and stem weight, but an increased leaf weight and leaf weight/area. Plant height and leaf area were the same for both treatments. Maleic hydrazide inhibited translocation of 14C from a single leaf exposed to 14CO2. Respiration was greater than in the controls three days after application of maleic hydrazide, but 9 and 14 days after application there were no differences in respiration between the two treatments. Maleic hydrazide did not affect photosynthetic activity.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1399-3054.1974.tb03744.x
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  • 4
    Electronic Resource
    Electronic Resource
    Influence of endophyte infection, plant age and harvest interval on Rhopalosiphum padi survival and its relation to quantity of N-formyl and N-acetyl loline in tall fescue (1991)
    Springer
    Entomologia experimentalis et applicata 60 (1991), S. 29-38 
    Details
    ISSN: 1570-7458
    Keywords: Festuca arundinacea ; pyrrolizidine alkaloids ; Acremonium coenophialum ; host plant resistance
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Rhopalosiphum padi L. (Homoptera: Aphididae) is sensitive to loline alkaloids present in tall fescue, Festuca arundinacea Shreb., infected with the endophytic fungus, Acremonium coenophialum Morgan-Jones & Gams. Aphid survival was higher on endophyte-free plants regardless of plant age after germination or age of regrowth tissue after clipping. Survival of aphids on endophyte-infected grass was lower on young tissue but increased as plants aged, although it never reached the same level on endophyte-free plants. Both N-formyl and N-acetyl loline increased as uncut or regrowth tissue aged; however, this was influenced by the age of the plant at the initial cut and the clipping frequency. Although even small amounts of loline cause high aphid mortality, the aphids are able to survive on endophyte-infected plants if the tillers have senescing leaves which contain lower amounts of loline. Preference for senescing leaves may help R. padi avoid plant parts containing high amounts of toxic allelochemicals, thus contributing to higher numbers of aphids on older, endophyte-infected plants.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00164956
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  • 5
    Electronic Resource
    Electronic Resource
    Different Levels of Protective Alkaloids in Grasses with Stroma-forming and Seed-transmitted Epichloë/Neotyphodium Endophytes (2000)
    Springer
    Journal of chemical ecology 26 (2000), S. 1025-1036 
    Details
    ISSN: 1573-1561
    Keywords: Mutualistic symbiosis ; herbivory ; peramine ; loline ; ergovaline ; Epichloë ; Neotyphodium ; European grasses
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology
    Notes: Abstract The three alkaloid groups—lolines, ergopeptides, and peramine— are typically associated with endophyte infection of grasses, with the main function to protect hosts against herbivores. We determined levels of N-formylloline, N-acetylloline, ergovaline, and peramine in 18 European grasses naturally infected with seed-transmitted Neotyphodium endophytes or sexual Epichloë species. Peramine was the most common alkaloid, whereas lolines and ergovaline were only detected in Festuca hosts infected with E. festucae, N. coenophialum, or N. uncinatum. Only ten of the grass species analyzed contained detectable amounts of one or more of these alkaloids. There was a clear tendency for plants associated with stroma-forming Epichloë species to be free of alkaloids, and those that did produce alkaloids contained only small levels of peramine. In contrast, plants infected with seed-transmitted Neotyphodium endophytes often contained extremely high levels of lolines. Lolines enhance host survival through increased protection from herbivores and, thus, may be particularly favored in asexual endophytes that depend on host seed-production for their dispersal.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1005489032025
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    Paper (German National Licenses)
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  • 6
    Electronic Resource
    Electronic Resource
    Fungal endophyte-infected grasses: Alkaloid accumulation and aphid response (1990)
    Springer
    Journal of chemical ecology 16 (1990), S. 3301-3315 
    Details
    ISSN: 1573-1561
    Keywords: Endophyte-infected grasses ; Acremonium ; endophytes ; Epichloe typhina ; grass alkaloids ; lolines ; ergovaline ; peramine ; lolitrem B ; aphid responses ; plant resistance to herbivory ; Rhopalosiphum padi ; Schizaphis graminum ; Homoptera ; Aphididae
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology
    Notes: Abstract The occurrence of the alkaloidsN-formyl andN-acetyl loline, peramine, lolitrem B, and ergovaline and the response of aphids to plants containing these compounds were determined in species and cultivars ofFestuca,Lolium, and other grass genera infected with fungal endophytes (Acremonium spp., andEpichloe typhina). Twenty-nine of 34 host-fungus associations produced one or more of the alkaloids, most frequently peramine or ergovaline. Three alkaloids (lolines, peramine, and ergovaline) were found in tall fescue and in perennial ryegrass infected withA. coenophialum, while peramine, lolitrem B, and ergovaline were present in perennial ryegrass and in tall fescue infected withA. lolii and inF. longifolia infected withE. typhina. WhileA. coenophialum andA. lolii produced similar patterns of alkaloids regardless of the species or cultivar of grass they infected, isolates ofE. typhina produced either no alkaloids or only one or two different alkaloids in the grasses tested. Aphid bioassays indicated thatRhopalosiphum padi andSchizaphis graminum did not survive on grasses containing loline alkaloids and thatS. graminum did not survive on peramine-containing grasses. Ergovaline-containing grasses did not affect either aphid.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00982100
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