TY  - JOUR
AU  - Schwartzberg, E.G.
AU  - Kunert, G.
AU  - Stephan, C.
AU  - David, A.
AU  - Röse, U. S. R.
AU  - Gershenzon, J.
AU  - Weisser, W. W.
TI  - Real-time analysis of alarm pheromone emission by the pea aphid (Acyrthosiphon Pisum) unter predation
JO  - Journal of chemical ecology
VL  - 34
SN  - 0098-0331
CY  - New York, NY [u.a.]
PB  - Springer Science + Business Media B.V.
M1  - PreJuSER-62749
SP  - 76 - 81
PY  - 2008
N1  - Record converted from VDB: 12.11.2012
AB  - Upon attack by predators or parasitoids, aphids emit volatile chemical alarm signals that warn other aphids of a potential risk of predation. Release rate of the major constituent of the alarm pheromone in pea aphids (Acyrthosiphon pisum), (E)-b-farnesene (EBF), was measured for all nymphal and the adult stage as aphids were attacked individually by lacewing (Chrysoperla carnae) larvae. Volatilization of EBF from aphids under attack was quantified continuously for 60 min at 2-min intervals with a rapid gas chromatography technique (zNose) to monitor headspace emissions. After an initial burst, EBF volatilization declined exponentially, and detectable amounts were still present after 30 min in most cases. Total emission of EBF averaged 16.33 +/- 1.54 ng and ranged from 1.18 to 48.85 ng. Emission was higher in nymphs as compared to adults. No differences between pea aphid life stages were detected for their speed of alarm signal emission in response to lacewing larvae attack. This is the first time that alarm pheromone emission from single aphids has been reported.
KW  - Animals
KW  - Chromatography, Gas
KW  - Insects: physiology
KW  - Larva: physiology
KW  - Pheromones: metabolism
KW  - Predatory Behavior
KW  - Sesquiterpenes: metabolism
KW  - Volatilization
KW  - Pheromones (NLM Chemicals)
KW  - Sesquiterpenes (NLM Chemicals)
KW  - beta-farnesene (NLM Chemicals)
KW  - J (WoSType)
LB  - PUB:(DE-HGF)16
C6  - pmid:18092189
C2  - pmc:PMC2758399
UR  - <Go to ISI:>//WOS:000252768400010
DO  - DOI:10.1007/s10886-007-9397-8
UR  - https://juser.fz-juelich.de/record/62749
ER  -