Holighaus, Gerrit

[["dc.bibliographiccitation.firstpage","271"],["dc.bibliographiccitation.issue","5"],["dc.bibliographiccitation.journal","Chemoecology"],["dc.bibliographiccitation.lastpage","283"],["dc.bibliographiccitation.volume","25"],["dc.contributor.author","Stoetefeld, Laura"],["dc.contributor.author","Holighaus, Gerrit"],["dc.contributor.author","Schuetz, Stefan"],["dc.contributor.author","Rohlfs, Marko"],["dc.date.accessioned","2018-11-07T09:51:22Z"],["dc.date.available","2018-11-07T09:51:22Z"],["dc.date.issued","2015"],["dc.description.abstract","In analogy to herbivores, fungivorous animals may find suitable host fungi using fungal volatiles as infochemicals and to distinguish between fungi of varying suitability. This study tests the influence of volatiles emitted by micro-fungi, yeast and mould, on the foraging behaviour of facultative fungivorous Drosophila melanogaster larvae. We hypothesised that establishing or avoiding contact with edible yeast (host fungus) and inedible, toxic mould (non-host fungus) is regulated by fungus-specific variation in volatile production. In particular, we expected the non-host fungus to produce specific volatiles that repel fly larvae and thus contribute to signal inedibility. By quantifying innate variation in arrival of individual D. melanogaster larvae at colonies of the mutualist yeast Candida californica or of the antagonistic mould Penicillium expansum, we found the yeast to attract more rapidly a larger number of larvae than the mould did. The developmental stage (young, vegetative vs. old, sporulating) of P. expansum did not affect arrival of larvae at fungal colonies. We used gas chromatography coupled with mass spectrometry (GC-MS) to identify the composition of fungal volatiles. Four compounds appeared to be yeast-specific, twenty to be mould-specific volatiles. Eight volatiles were consistently produced by both young and old P. expansum. Two compounds, 3-methyl-1-butanol and 2-methyl-1-propanol, were released by P. expansum (young and old) as well as C. californica. Time-dependent behavioural response profiles of similar to 750 D. melanogaster larvae revealed innate attraction to three alcohols produced by yeast and/or moulds and to two yeast-specific organic acids. We found no indication of a repellent effect of mould-specific compounds, including terpenoids like geosmin known to elicit strong avoidance behaviour of adult D. melanogaster in response to harmful microbes. Also, synthetic mould and yeast-specific blends of attractive compounds were equally attractive to the larvae. With respect to the species combinations investigated in this study, we hypothesize that qualitative differences in fungal volatile profiles are of minor relevance in how Drosophila larvae locate and probably discriminate between fungi of varying suitability."],["dc.description.sponsorship","DFG (German Research Foundation) [RO3523/3-1, RO3523/3-2]"],["dc.identifier.doi","10.1007/s00049-015-0197-2"],["dc.identifier.isi","000360846200005"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/35897"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.publisher","Springer"],["dc.publisher.place","Basel"],["dc.relation.issn","1423-0445"],["dc.relation.issn","0937-7409"],["dc.title","Volatile-mediated location of mutualist host and toxic non-host microfungi by Drosophila larvae"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.status","published"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","477"],["dc.bibliographiccitation.issue","6"],["dc.bibliographiccitation.journal","Journal of Applied Entomology"],["dc.bibliographiccitation.lastpage","486"],["dc.bibliographiccitation.volume","141"],["dc.contributor.author","Balakrishnan, K."],["dc.contributor.author","Holighaus, Gerrit"],["dc.contributor.author","Weissbecker, Bernhard"],["dc.contributor.author","Schuetz, Stefan"],["dc.date.accessioned","2018-11-07T10:22:24Z"],["dc.date.available","2018-11-07T10:22:24Z"],["dc.date.issued","2017"],["dc.description.abstract","The red flour beetle Tribolium castaneum Herbst (Coleoptera: Tenebrionidae) is the most encountered and destructive stored product insect pest of cereal grains and seeds. Although this beetle has been used as a model organism for many decades, there is no systematic knowledge about antennal detection of host and non-host volatiles. Electroantennogram responses to 94 selected volatile organic compounds including alkanes, alkenes, alcohols, aldehydes, ketones, carboxylic acids, esters, terpenoids and aromatic compounds were recorded from both sexes of T.castaneum. Overall, female and male T.castaneum exhibited similar electroantennography (EAG) responses. Compounds eliciting the strongest EAG responses within compound groups of chemical similarity were undecane, 1-hexen-3-ol, octanal, 2-heptanone, hexanoic acid and ethyl hexanoate. Comparison of vapour pressure and EAG amplitudes within homologous series of compounds revealed responses to undecane, octadecane, octanal, nonanal, 2-heptanone, hexanoic acid and octanoic acid as outstanding. Given that systematic EAG screenings have not been conducted before, these are the best candidates for evaluation in future behavioural studies to unravel their potential for application in integrated pest management strategies of T.castaneum."],["dc.identifier.doi","10.1111/jen.12366"],["dc.identifier.isi","000402677200007"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/42265"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","PUB_WoS_Import"],["dc.publisher","Wiley"],["dc.relation.issn","1439-0418"],["dc.relation.issn","0931-2048"],["dc.title","Electroantennographic responses of red flour beetle Tribolium castaneum Herbst (Coleoptera: Tenebrionidae) to volatile organic compounds"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.status","published"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","57"],["dc.bibliographiccitation.issue","2"],["dc.bibliographiccitation.journal","Chemoecology"],["dc.bibliographiccitation.lastpage","66"],["dc.bibliographiccitation.volume","24"],["dc.contributor.author","Holighaus, Gerrit"],["dc.contributor.author","Weissbecker, Bernhard"],["dc.contributor.author","von Fragstein, Maximilian"],["dc.contributor.author","Schuetz, Stefan"],["dc.date.accessioned","2018-11-07T09:42:13Z"],["dc.date.available","2018-11-07T09:42:13Z"],["dc.date.issued","2014"],["dc.description.abstract","An enormous variety of volatile substances are released in distinctive blends by fungal substrates that should be recognisable for fungivores. Certain compounds dominate in most of the fungal species. Fungal oxylipins as the eight-carbon volatiles are the most prominent. This raises the question whether such are specific enough to qualify as appropriate host cues for a fungivore. We could demonstrate differentiated responses of the fungivorous beetle Bolitophagus reticulatus to eight-carbon volatiles: Nine eight-carbon volatiles were identified with GC-MS from its host fungus Fomes fomentarius. 1-Octen-3-ol, 3-octanone and 3-octanol induced contrasting behaviour of beetles in olfactometer bioassays. Electroantennographic experiments investigating the beetle olfactory sense revealed distinguishable antennal responses. Moreover, their individual release from F. fomentarius fruiting bodies changes not only considerably, but also independently over successive stages of beetle colonisation. Concentrations of attractive and repellent eight-carbon volatiles correlate to frequency of beetles in the field and further substantiate their relevance as host cues. Our results show that a specialist fungivore is able to differentiate the most common eight-carbon volatiles of fungi to assess host quality. Key roles and marked similarities of fungal to plant oxylipins suggest a comparable importance of eight-carbon volatiles to fungivores as green leaf volatiles have to herbivores."],["dc.identifier.doi","10.1007/s00049-014-0151-8"],["dc.identifier.isi","000332758600003"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/33907"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.publisher","Springer"],["dc.publisher.place","Basel"],["dc.relation.issn","1423-0445"],["dc.relation.issn","0937-7409"],["dc.title","Ubiquitous eight-carbon volatiles of fungi are infochemicals for a specialist fungivore"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.status","published"],["dspace.entity.type","Publication"]]