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  • 1
    Electronic Resource
    Electronic Resource
    Extreme intraspecific chemical variability in soldier defense secretions of allopatric and sympatric colonies ofLongipeditermes longipes (1984)
    Springer
    Journal of chemical ecology 10 (1984), S. 929-944 
    Details
    ISSN: 1573-1561
    Keywords: Termites ; Isoptera ; Termitidae ; Longipeditermes longipes ; defense secretions ; intraspecific variability ; diterpenes
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology
    Notes: Abstract The chemical defense secretions of major and minor soldiers of over 18 colonies of the primitive glue-squirting nasute termiteLongipeditermes longipes (Isoptera, Termitidae, Nasutitermitinae) were analyzed chormatographically. The colonies, collected from four rainforest sites in peninsular Malaysia, showed monoterpene patterns rich in pinenes and limonene but with few quantitative differences between colonies. In marked contrast, the diterpene chemistry is high variable, and includes tricyclic (trinervitane), tetracyclic (rippertane), bicyclic (secotrinervitane), and a new spirotetracyclic (longipane) skeleton. Three new natural products are included in this remarkable and unprecedented example of structural diversity among different colonies of a single species.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00987974
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  • 2
    Electronic Resource
    Electronic Resource
    Soldier defense secretions of the genusHospitalitermes in Peninsular Malaysia (1986)
    Springer
    Journal of chemical ecology 12 (1986), S. 701-712 
    Details
    ISSN: 1573-1561
    Keywords: Termites ; Isoptera ; Termitidae ; defense secretions ; interspecific variations ; Hospitalitermes species ; diterpenes
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology
    Notes: Abstract Soldier defense secretions of the genusHospitalitermes (Isoptera, Termitidae, Nasutitermitinae) were chemically analyzed by GC-MS and were found to contain volatile monoterpenes and polyoxygenated diterpenes. Interspecific and intraspecific chemical variations forH. umbrinus, H. hospitalis, H. flaviventris, andH. bicolor are described. Interspecific variations in monoterpene and diterpene structures and compositions were evident. A remarkable example of large intraspecific variation from a single species was observed inH. umbrinus, indicating that colonies of this species can be separable into two chemically distinct groups. The diterpenes found in one of these groups have unusually high molecular weights.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01012103
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  • 3
    Electronic Resource
    Electronic Resource
    Interspecific variation in defense secretions of malaysian termites from the genusNasutitermes (Isoptera, nasutitermitinae) (1989)
    Springer
    Journal of chemical ecology 15 (1989), S. 549-563 
    Details
    ISSN: 1573-1561
    Keywords: Isoptera ; Termitidae ; defense secretions ; interspecific variations ; Nasutitermes ; diterpenes
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology
    Notes: Abstract The defense secretions of five species of MalaysianNasutitermes,N. longinasus, N. matangensis, N, havilandi, N. johoricus, andNasutitermes species 01, are compared.N. longinasus andN. species 01 provide trinervitene alcohols,N. havilandi mainly tricyclic trinervitene and tetracyclic kempane alcohols and acetates, whereasN. matangensis furnish acetyl/propionyl derivatives of trinervita-11(12),15(17)-dien-3α,9β,13α-triol (XXI and XXII). A new diterpene, assigned as trinervita-11(12),15(17)-dien-3α,13α-diol-3,13-O-diacetate (XVII), is isolated fromN. havilandi. The mono- and diterpenoid compositions, being species-specific, are useful for chemotaxonomic and phylogenetic studies.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01014700
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  • 4
    Electronic Resource
    Electronic Resource
    Soldier defense secretions of malaysian free-ranging termite of the genusLacessititermes (Isoptera, Nasutitermitinae) (1990)
    Springer
    Journal of chemical ecology 16 (1990), S. 619-630 
    Details
    ISSN: 1573-1561
    Keywords: Isoptera ; Termitidae ; defense secretions ; interspecific variations ; Lacessititermes ; diterpenes
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology
    Notes: Abstract Soldiers of free-ranging termites of the genusLacessititermes (Isoptera, Nasutitermitinae) secrete from their frontal glands a mixture of monoterpenes, sesquiterpenes, and diterpenes.Lacessititermes ransoneti, L. laborator, andL. species A produce species-specific secretions, the composition being most complex forL. laborator. Apart from known mono- and dihydroxytrinervitadienes, the following new diterpenes were isolated and tentatively assigned as trinervita-1(15),8(19)-dien-2β,3α,9α,14α-tetraol 2,3,14-O-triacetate, trinervita-1(15),8(19)-dien-2β,3α,9β,14α-tetraol 2,3,14-O-triacetate, 2β,3α,9α, 14α-tetraacetoxy-1 (15), 8(19)-trinervitadiene, and 2β,3α,11α,13α-tetraacetoxy-1(15),8(19)-trinervitadiene. Data on intragenus chemical variations were subjected to canonical discriminant analysis and genetic distances among the species were calculated to depict intragenus identities and affinities.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01021792
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