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  • 1
    Electronic Resource
    Electronic Resource
    Physiology of Tree Resistance to Insects (1975)
    Palo Alto, Calif. : Annual Reviews
    Annual Review of Entomology 20 (1975), S. 75-95 
    Details
    ISSN: 0066-4170
    Source: Annual Reviews Electronic Back Volume Collection 1932-2001ff
    Topics: Biology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1146/annurev.en.20.010175.000451
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    Paper (German National Licenses)
    Fulltext
  • 2
    Electronic Resource
    Electronic Resource
    A Comparison of Phenolic Constituents of Pinus monticola Resistant and Susceptible to Cronartium ribicola (1966)
    Oxford, UK : Blackwell Publishing Ltd
    Physiologia plantarum 19 (1966), S. 0 
    Details
    ISSN: 1399-3054
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: Polyphenols and simple phenols in Pinus monticola Dougl. foliage and hark were studied in relation to host resistance to Cronartium ribicola J. C. Fisch. ex Rabenh. More than 50 phenolic substances were detected but no qualitative differences were found between resistant and susceptible trees. Some evidence is given for a quantitative relationship between one polyphenol in white pine foliage and resistance to blister rust. This compound may be a guaiacyl derivative. Differences in phenolics due to tree-to-tree variation, needle age, tissue (foliage versus bark), and season of year are also reported.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1399-3054.1966.tb07042.x
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Changes in terpene production following nitrogen fertilization of grand fir (Abies grandis (Dougl.) Lindl.) seedlings (1989)
    Springer
    Oecologia 80 (1989), S. 485-489 
    Details
    ISSN: 1432-1939
    Keywords: Monoterpene ; Sesquiterpene ; Grand fir ; Nitrogen ; Allocation
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary Of ten terpenes that comprise most of the volatiles of grand fir foliage only four were affected by addition of nitrogen. Levels of beta-phellandrene, camphene and bornyl acetate and terpinolene were significantly reduced with nitrogen added to the equivalent amount of 44.8 g/m2. A quantity of 22.4 g/m2 did not affect terpene production. Several populations were examined and these did not respond consistently on a regional basis, yet a significant interaction effect was apparent between treatment and local population response. Overall, total yield of terpenes as a function of fertilization was not altered.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00380070
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    Paper (German National Licenses)
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  • 4
    Electronic Resource
    Electronic Resource
    Comparison of techniques for extracting volatile compounds from conifer needles (1990)
    Springer
    Journal of chemical ecology 16 (1990), S. 2713-2722 
    Details
    ISSN: 1573-1561
    Keywords: Monoterpenes ; Abies grandis ; Picea pungens ; steam distillation ; extraction ; secondary chemicals ; grand fir ; blue spruce ; coefficient of variation ; MANOVA
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology
    Notes: Abstract Five extraction techniques were used to obtain quantitative measurements of monoterpenes from blue spruce and grand fir needles. Multivariate analysis of variance indicated that there was a significant difference in the amount of each monoterpene extracted by using different techniques. For both species, an 8-hr steam distillation of 10 g of material yielded the greatest amount of each monoterpene. This technique was also the most reproducible in that the coefficients of variation were lowest. A rapid steam distillation was relatively effective for grand fir, but not for blue spruce. A CO2 extraction was unreliable for both species.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00988080
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    Paper (German National Licenses)
    Fulltext
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