The Chemistry of Pheromones and Other Semiochemicals II
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39 Result(s)
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Article
Spider Pheromones – a Structural Perspective
Spiders use pheromones for sexual communication, as do other animals such as insects. Nevertheless, knowledge about their chemical structure, function, and biosynthesis is only now being unraveled. Many studie...
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Wax Lipids Signal Nest Identity in Bumblebee Colonies
The signalling functions of cuticular lipids, particularly cuticular hydrocarbons, have gained considerable attention in social insect communication. Information transfer between individuals by means of these ...
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Markierungsfreie Liganden-Identifizierung in menschlichem Plasma
The coupling of surface plasmon resonance imaging (SPRi) and matrixassisted laser desorption ionization mass spectrometry (MALDI-MS) is an innovative approach for biomarker discovery in biological fluids. Mult...
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The Biosynthesis of Hexahydrofarnesylacetone in the Butterfly Pieris brassicae
Hexahydrofarnesylacetone (6,10,14-trimethylpentadecan-2-one, 1) is a widespread ketone occurring in plants and insects. Several species use this compound or the respective alcohol as part of their pheromone bouqu...
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Pheromone-based Mating and Aggregation in the Sorghum Chafer, Pachnoda interrupta
Adults of the sorghum chafer, Pachnoda interrupta Olivier (Coleoptera: Scarabaeidae: Cetoniinae), form aggregations during the mating period in July, but also in October. The beetles aggregate on food sources, e....
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Defense by Volatiles in Leaf-Mining Insect Larvae
The defense strategy of an insect toward natural enemies can include a trait that appears at first sight to contradict its defensive function. We explored phylogeny, chemistry, and defense efficiency of a pecu...
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Fine Tuning of Social Integration by Two Myrmecophiles of the Ponerine Army Ant, Leptogenys distinguenda
Myrmecophiles are animals that live in close association with ants and that frequently develop elaborate mechanisms to infiltrate their well-defended host societies. We compare the social integration strategie...
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An Antiaphrodisiac in Heliconius melpomene Butterflies
Gilbert (1976) suggested that male-contributed odors of mated females of Heliconius erato could enforce monogamy. We investigated the pheromone system of a relative, Heliconius melpomene, using chemical analysis,...
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(Z)-Pentacos-12-ene, an Oviposition-deterring Pheromone of Cheilomenes sexmaculata
Larvae of the coccinellid beetle Cheilomenes sexmaculata (F.) produce an oviposition-deterring pheromone that inhibits egg laying of conspecific females on oviposition sites walked over by first-instar larvae. By...
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Chemical Ecology of Fruit Bat Foraging Behavior in Relation to the Fruit Odors of Two Species of Paleotropical Bat-Dispersed Figs (Ficus hispida and Ficus scortechinii)
We investigated the fruit odors of two bat-dispersed fig species in the Paleotropics, in relation to the foraging behavior of fruit bats, to test the following hypotheses: 1) fruit odor plays a critical role f...
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Biosynthesis of (3Z,6Z,9Z)-3,6,9-Octadecatriene: The Main Component of the Pheromone Blend of Erannis bajaria
The hydrocarbons (3Z,6Z,9Z)-3,6,9-octadecatriene (3Z,6Z,9Z-18:H) and (3Z,6Z,9Z)-3,6,9-nonadecatriene (3Z,6Z,9Z-19:H) constitute the pheromone of the winter moth, Erannis bajaria. These compounds belong to a large...
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Analysing traces of autoinducer-2 requires standardization of the Vibrio harveyi bioassay
Autoinducer-2 (furanosyl borate diester) is a biologically active compound whose role as a universal bacterial signalling molecule is currently under intense investigation. Because of its instability and the l...
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The Chafer Pheromone Buibuilactone and Ant Pyrazines are also Produced by Marine Bacteria
Headspace extracts obtained from agar plate cultures of two marine bacteria from the North Sea (Germany), Loktanella strain BIO-204 and Dinoroseobacter shibae strain DFL-27, were analyzed by GC-MS. Several γ-lact...
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Benzoic Acid Derivatives in a Hypogastrurid Collembolan: Temperature-Dependent Formation and Biological Significance as Deterrents
Two phenolic acids were identified in the collembolan Ceratophysella denticulata: 3-hydroxy-4,5 dimethoxy benzoic acid and 4-hydroxy-3,5-dimethoxybenzoic acid (syringic acid). These are localized on or in the int...
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Chemical Analysis of Volatiles Emitted by Pinus sylvestris After Induction by Insect Oviposition
Gas chromatography – mass spectrometry analyses of the headspace volatiles of Scots pine (Pinus sylvestris) induced by egg deposition of the sawfly Diprion pini were conducted. The odor blend of systemically ovip...
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Chemical Polymorphism of the Cuticular Lipids of the Cabbage White Pieris rapae
The epicuticular composition of different body parts of the Cabbage White, Pieris rapae L., was investigated using GC and GC/MS. The major group of components, hydrocarbons, occurs in two distinct classes, which ...
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Analysis of Volatiles Induced by Oviposition of Elm Leaf Beetle Xanthogaleruca luteola on Ulmus minor
Egg deposition of the elm leaf beetle Xanthogaleruca luteola causes the emission of volatiles from its food plant, Ulmus minor. These volatiles are exploited by the egg parasitoid, Oomyzus gallerucae, to locat...
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Male pheromone of swift moth,Hepialus hecta L. (Lepidoptera: Hepialidae)
(R)-6-Ethyl-2-methyl-2,3-dihydro-4H-pyran-4-one, (1R,3S,5R)-3-ethyl-1,8-dimethyl-2,9-dioxabicyclo[3.3. 1]non-7-ene, and (1R,3S,5R)-3-ethyl-1,8-dimethyl-2,9-dioxabicyclo[3.3.1]non-7-en-6-one represent the main ...
