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  • 1
    Online Resource
    Online Resource
    Insect egg deposition induces defence responses in Pinus sylvestris : characterisation of the elicitor
    The Company of Biologists ; 2005
    In:  Journal of Experimental Biology Vol. 208, No. 10 ( 2005-05-15), p. 1849-1854
    Details
    In: Journal of Experimental Biology, The Company of Biologists, Vol. 208, No. 10 ( 2005-05-15), p. 1849-1854
    Abstract: Egg deposition by the phytophagous sawfly Diprion pini L.(Hymenoptera, Diprionidae) is known to induce locally and systemically the emission of volatiles in Scots pine (Pinus sylvestris L.) that attract the egg parasitoid Chrysonotomyia ruforum Krausse(Hymenoptera, Eulophidae). The egg parasitoids kill the eggs and thus prevent damage to the plant from feeding sawfly larvae. The elicitor inducing the pine's response is known to be located in the oviduct secretion which the female sawfly applies to the eggs when inserting them into a slit in the pine needle using the sclerotized ovipositor valves. In this study we have characterized the elicitor. The elicitor was still active when isolated from the oviduct and applied directly to slits made in the pine needles. However,as soon as the oviduct secretion was dissolved in Aqua dest. and stored for 3 h at room temperature or kept frozen at -80°C, its activity was lost. In contrast, oviduct secretion kept its eliciting activity, when dissolved in Ringer solution (pH 7.2) both after storage at room temperature and after freezing. The activity of the elicitor vanished after treatment of the oviduct secretion with proteinase K, which destroyed all proteins. This suggests that the elicitor in the oviduct secretion is a peptide or protein, or a component bound to these. SDS-PAGE revealed a similar, but not identical protein pattern from hemolymph and oviduct secretion. Hemolymph itself has no eliciting effect. The elicitor in the oviduct secretion is only active when transferred to slit pine needles, since its application on undamaged needles did not induce the emission of attractive volatiles.
    Type of Medium: Online Resource
    ISSN: 1477-9145 , 0022-0949
    URL: Article
    DOI: 10.1242/jeb.01578
    Language: English
    Publisher: The Company of Biologists
    Publication Date: 2005
    detail.hit.zdb_id: 1482461-9
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  • 2
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    Anti-aphrodisiac Compounds of Male Butterflies Increase the Risk of Egg Parasitoid Attack by Inducing Plant Synomone Production
    Springer Science and Business Media LLC ; 2009
    In:  Journal of Chemical Ecology Vol. 35, No. 11 ( 2009-11), p. 1373-1381
    Details
    In: Journal of Chemical Ecology, Springer Science and Business Media LLC, Vol. 35, No. 11 ( 2009-11), p. 1373-1381
    Type of Medium: Online Resource
    ISSN: 0098-0331 , 1573-1561
    URL: Article
    DOI: 10.1007/s10886-009-9714-5
    Language: English
    Publisher: Springer Science and Business Media LLC
    Publication Date: 2009
    detail.hit.zdb_id: 2016744-1
    SSG: 12
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  • 3
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    Courtship Pheromones in Parasitic Wasps: Comparison of Bioactive and Inactive Hydrocarbon Profiles by Multivariate Statistical Methods
    Springer Science and Business Media LLC ; 2007
    In:  Journal of Chemical Ecology Vol. 33, No. 4 ( 2007-3-13), p. 825-838
    Details
    In: Journal of Chemical Ecology, Springer Science and Business Media LLC, Vol. 33, No. 4 ( 2007-3-13), p. 825-838
    Type of Medium: Online Resource
    ISSN: 0098-0331 , 1573-1561
    URL: Article
    DOI: 10.1007/s10886-007-9265-6
    Language: English
    Publisher: Springer Science and Business Media LLC
    Publication Date: 2007
    detail.hit.zdb_id: 2016744-1
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  • 4
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    Variation in natural plant products and the attraction of bodyguards involved in indirect plant defenseThe present review is one in the special series of reviews on animal–plant interactions.
    Canadian Science Publishing ; 2010
    In:  Canadian Journal of Zoology Vol. 88, No. 7 ( 2010-07), p. 628-667
    Details
    In: Canadian Journal of Zoology, Canadian Science Publishing, Vol. 88, No. 7 ( 2010-07), p. 628-667
    Abstract: Plants can respond to feeding or egg deposition by herbivorous arthropods by changing the volatile blend that they emit. These herbivore-induced plant volatiles (HIPVs) can attract carnivorous natural enemies of the herbivores, such as parasitoids and predators, a phenomenon that is called indirect plant defense. The volatile blends of infested plants can be very complex, sometimes consisting of hundreds of compounds. Most HIPVs can be classified as terpenoids (e.g., (E)-β-ocimene, (E,E)-α-farnesene, (E)-4,8-dimethyl-1,3,7-nonatriene), green leaf volatiles (e.g., hexanal, (Z)-3-hexen-1-ol, (Z)-3-hexenyl acetate), phenylpropanoids (e.g., methyl salicylate, indole), and sulphur- or nitrogen-containing compounds (e.g., isothiocyanates or nitriles, respectively). One highly intriguing question has been which volatiles out of the complex blend are the most important ones for the carnivorous natural enemies to locate "suitable host plants. Here, we review the methods and techniques that have been used to elucidate the carnivore-attracting compounds. Electrophysiological methods such as electroantennography have been used with parasitoids to elucidate which compounds can be perceived by the antennae. Different types of elicitors and inhibitors have widely been applied to manipulate plant volatile blends. Furthermore, transgenic plants that were genetically modified in specific steps in one of the signal transduction pathways or biosynthetic routes have been used to find steps in HIPV emission crucial for indirect plant defense. Furthermore, we provide an overview on biotic and abiotic factors that influence the emission of HIPVs and how this can affect the interactions between members of different trophic levels. Consequently, we review the progress that has been made in this exciting research field during the past 30 years since the first studies on HIPVs emerged and we highlight important issues to be addressed in the future.
    Type of Medium: Online Resource
    ISSN: 0008-4301 , 1480-3283
    URL: Article
    DOI: 10.1139/Z10-032
    RVK:
    WA 15000
    Language: English
    Publisher: Canadian Science Publishing
    Publication Date: 2010
    detail.hit.zdb_id: 1490831-1
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  • 5
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    Metabolic responses of Eucalyptus species to different temperature regimes
    Wiley ; 2018
    In:  Journal of Integrative Plant Biology Vol. 60, No. 5 ( 2018-05), p. 397-411
    Details
    In: Journal of Integrative Plant Biology, Wiley, Vol. 60, No. 5 ( 2018-05), p. 397-411
    Abstract: Species and hybrids of Eucalyptus are the world's most widely planted hardwood trees. They are cultivated across a wide range of latitudes and therefore environmental conditions. In this context, comprehensive metabolomics approaches have been used to assess how different temperature regimes may affect the metabolism of three species of Eucalyptus , E. dunnii, E. grandis and E. pellita . Young plants were grown for 53 d in the greenhouse and then transferred to growth chambers at 10°C, 20°C or 30°C for another 7 d. In all three species the leaf chlorophyll content was positively correlated to temperature, and in E. pellita the highest temperature also resulted in a significant increase in stem biomass. Comprehensive metabolomics was performed using untargeted gas chromatography mass spectrometry (GC‐MS) and liquid chromatography (LC)‐MS. This approach enabled the comparison of the relative abundance of 88 polar primary metabolites from GC‐MS and 625 semi‐polar secondary metabolites from LC‐MS. Using principal components analysis, a major effect of temperature was observed in each species which was larger than that resulting from the genetic background. Compounds mostly affected by temperature treatment were subsequently selected using partial least squares discriminant analysis and were further identified. These putative annotations indicated that soluble sugars and several polyphenols, including tannins, triterpenes and alkaloids were mostly influenced.
    Type of Medium: Online Resource
    ISSN: 1672-9072 , 1744-7909
    URL: Issue
    URL: Article
    DOI: 10.1111/jipb.v60.5
    DOI: 10.1111/jipb.12626
    Language: English
    Publisher: Wiley
    Publication Date: 2018
    detail.hit.zdb_id: 2130095-1
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  • 6
    Online Resource
    Online Resource
    Differences in acidity of apples are probably mainly caused by a malic acid transporter gene on LG16
    Springer Science and Business Media LLC ; 2013
    In:  Tree Genetics & Genomes Vol. 9, No. 2 ( 2013-4), p. 475-487
    Details
    In: Tree Genetics & Genomes, Springer Science and Business Media LLC, Vol. 9, No. 2 ( 2013-4), p. 475-487
    Type of Medium: Online Resource
    ISSN: 1614-2942 , 1614-2950
    URL: Article
    DOI: 10.1007/s11295-012-0571-y
    Language: English
    Publisher: Springer Science and Business Media LLC
    Publication Date: 2013
    detail.hit.zdb_id: 2180926-4
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    SSG: 23
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  • 7
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    Quantitative resistance against Bemisia tabaci in Solanum pennellii : Genetics and metabolomics
    Wiley ; 2016
    In:  Journal of Integrative Plant Biology Vol. 58, No. 4 ( 2016-04), p. 397-412
    Details
    In: Journal of Integrative Plant Biology, Wiley, Vol. 58, No. 4 ( 2016-04), p. 397-412
    Abstract: The whitefly Bemisia tabaci is a serious threat in tomato cultivation worldwide as all varieties grown today are highly susceptible to this devastating herbivorous insect. Many accessions of the tomato wild relative Solanum pennellii show a high resistance towards B. tabaci . A mapping approach was used to elucidate the genetic background of whitefly‐resistance related traits and associated biochemical traits in this species. Minor quantitative trait loci (QTLs) for whitefly adult survival (AS) and oviposition rate (OR) were identified and some were confirmed in an F 2 BC 1 population, where they showed increased percentages of explained variance (more than 30%). Bulked segregant analyses on pools of whitefly‐resistant and ‐susceptible F 2 plants enabled the identification of metabolites that correlate either with resistance or susceptibility. Genetic mapping of these metabolites showed that a large number of them co‐localize with whitefly‐resistance QTLs. Some of these whitefly‐resistance QTLs are hotspots for metabolite QTLs. Although a large number of metabolite QTLs correlated to whitefly resistance or susceptibility, most of them are yet unknown compounds and further studies are needed to identify the metabolic pathways and genes involved. The results indicate a direct genetic correlation between biochemical‐based resistance characteristics and reduced whitefly incidence in S. pennellii .
    Type of Medium: Online Resource
    ISSN: 1672-9072 , 1744-7909
    URL: Issue
    URL: Article
    DOI: 10.1111/jipb.v58.4
    DOI: 10.1111/jipb.12449
    Language: English
    Publisher: Wiley
    Publication Date: 2016
    detail.hit.zdb_id: 2130095-1
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  • 8
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    Significance of terpenoids in induced indirect plant defence against herbivorous arthropods
    Wiley ; 2008
    In:  Plant, Cell & Environment Vol. 31, No. 4 ( 2008-04), p. 575-585
    Details
    In: Plant, Cell & Environment, Wiley, Vol. 31, No. 4 ( 2008-04), p. 575-585
    Abstract: Many plants respond to herbivory by arthropods with an induced emission of volatiles such as green leaf volatiles and terpenoids. These herbivore‐induced plant volatiles (HIPVs) can attract carnivores, for example, predators and parasitoids. We investigated the significance of terpenoids in attracting herbivores and carnivores in two tritrophic systems where we manipulated the terpenoid emission by treating the plants with fosmidomycin, which inhibits one of the terpenoid biosynthetic pathways and consequently terpenoid emission. In the ‘lima bean’ system, volatiles from spider‐mite‐infested fosmidomycin‐treated plants were less attractive to the predatory mite Phytoseiulus persimilis than from infested control plants. In the ‘cabbage’ system, fosmidomycin treatment did not alter the attractiveness of Brussels sprouts to two Pieris butterflies for oviposition. The parasitoid Cotesia glomerata did not discriminate between the volatiles of fosmidomycin‐treated and water‐treated caterpillar‐infested cabbage. Both P. persimilis and C. glomerata preferred volatiles from infested plants to uninfested ones when both were treated with fosmidomycin. Chemical analysis showed that terpenoid emission was inhibited more strongly in infested lima bean plants than in Brussels sprouts plants after fosmidomycin treatment. This study shows an important role of terpenoids in the indirect defence of lima bean, which is discussed relative to the role of other HIPVs.
    Type of Medium: Online Resource
    ISSN: 0140-7791 , 1365-3040
    URL: Issue
    URL: Article
    DOI: 10.1111/pce.2008.31.issue-4
    DOI: 10.1111/j.1365-3040.2008.01783.x
    RVK:
    WA 15000
    Language: English
    Publisher: Wiley
    Publication Date: 2008
    detail.hit.zdb_id: 391893-2
    detail.hit.zdb_id: 2020843-1
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  • 9
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    Choosy egg parasitoids: Specificity of oviposition‐induced pine volatiles exploited by an egg parasitoid of pine sawflies
    Wiley ; 2005
    In:  Entomologia Experimentalis et Applicata Vol. 115, No. 1 ( 2005-04), p. 217-225
    Details
    In: Entomologia Experimentalis et Applicata, Wiley, Vol. 115, No. 1 ( 2005-04), p. 217-225
    Abstract: Generalist parasitoids are well‐known to be able to cope with the high genotypic and phenotypic plasticity of plant volatiles by learning odours during their host encounters. In contrast, specialised parasitoids often respond innately to host‐specific cues. Previous studies have shown that females of the specialised egg parasitoid Chrysonotomyia ruforum Krausse (Hymenoptera: Eulophidae) are attracted to volatiles from Pinus sylvestris L. induced by the egg deposition of its host Diprion pini L. (Hymenoptera: Diprionidae), when they have previously experienced pine twigs with host eggs. In this study we investigated by olfactometer bioassays how specifically C. ruforum responded to oviposition‐induced plant volatiles. Furthermore, we studied whether parasitoids show an innate response to oviposition‐induced pine volatiles. Naïve parasitoids were not attracted to oviposition‐induced pine volatiles. The attractiveness of volatiles from pines carrying eggs was shown to be specific for the pine and herbivore species, respectively (species specificity). We also tested whether not only oviposition, but also larval feeding, induces attractive volatiles (developmental stage specificity). The feeding of D. pini larvae did not induce the emission of P. sylvestris volatiles attractive to the egg parasitoid. Our results show that a specialist egg parasitoid does not innately show a positive response to oviposition‐induced plant volatiles, but needs to learn them. Furthermore, the results show that C. ruforum as a specialist does not learn a wide range of volatiles as some generalists do, but instead learns only a very specific oviposition‐induced plant volatile pattern, i.e., a pattern induced by the most preferred host species laying eggs on the most preferred food plant.
    Type of Medium: Online Resource
    ISSN: 0013-8703 , 1570-7458
    URL: Issue
    URL: Article
    DOI: 10.1111/eea.2005.115.issue-1
    DOI: 10.1111/j.1570-7458.2005.00262.x
    RVK:
    WA 15000
    Language: English
    Publisher: Wiley
    Publication Date: 2005
    detail.hit.zdb_id: 2015286-3
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  • 10
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    Resistance factors in pepper inhibit larval development of thrips (Frankliniella occidentalis)
    Wiley ; 2012
    In:  Entomologia Experimentalis et Applicata Vol. 145, No. 1 ( 2012-10), p. 62-71
    Details
    In: Entomologia Experimentalis et Applicata, Wiley, Vol. 145, No. 1 ( 2012-10), p. 62-71
    Type of Medium: Online Resource
    ISSN: 0013-8703
    URL: Issue
    URL: Article
    DOI: 10.1111/eea.2012.145.issue-1
    DOI: 10.1111/j.1570-7458.2012.01304.x
    RVK:
    WA 15000
    Language: English
    Publisher: Wiley
    Publication Date: 2012
    detail.hit.zdb_id: 2015286-3
    SSG: 12
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