Journal ArticleDOI
Identification of Semiochemicals Released During Aphid Feeding That Attract Parasitoid Aphidius ervi
Reads0
Chats0
TLDR
Volatiles obtained by air entrainment of aphid infested plants were more attractive to A. ervi than those from uninfested plants, in both behavioral bioassays and activity of pure compounds, which significantly increased parasitoid responses to these compounds.Abstract:
Herbivore induced release of plant volatiles mediating the foraging behavior of the aphid parasitoid Aphidius ervi was investigated using the pea aphid, Acyrthosiphon pisum, feeding on broad bean, Vicia faba. Behavioral responses were studied using an olfactometer and a wind tunnel. Volatiles obtained by air entrainment of aphid infested plants were more attractive to A. ervi than those from uninfested plants, in both behavioral bioassays. GC-EAG of both extracts showed a number of peaks associated with responses by A. ervi, but with some differences between extracts. Compounds giving these peaks were tentatively identified by GC-MS and confirmed by comparison with authentic samples on GC, using two columns of different polarity. The activity of pure compounds was further investigated by EAG and wind tunnel assays. Results showed that, of the compounds tested, 6-methyl-5-hepten-2-one was the most attractive for A. ervi females, with linalool, (Z)-3-hexen-1-yl acetate, (E)-β-ocimene, (Z)-3-hexen-1-ol, and (E)-β-farnesene all eliciting significantly more oriented flight behavior than a solvent control. Foraging experience significantly increased parasitoid responses to these compounds, with the exception of (E)-β-farnesene. Time-course GC analysis showed that feeding of A. pisum on V. faba induced or increased the release of several compounds. Release of two of these compounds (6-methyl-5-hepten-2-one and geranic acid) was not induced by the nonhost black bean aphid, Aphis fabae. During the analysis period, production of (E)-β-ocimene remained constant, but 6-methyl-5-hepten-2-one, linalool, geranic acid, and (E)-β-farnesene appeared during the first day after A. pisum infestation and increased in concentration with increasing time of aphid feeding.read more
Citations
More filters
Journal ArticleDOI
The Role of Root Exudates in Rhizosphere Interactions with Plants and Other Organisms
TL;DR: Recent advances in elucidating the role of root exudates in interactions between plant roots and other plants, microbes, and nematodes present in the rhizosphere are described.
Journal ArticleDOI
The Myriad Plant Responses to Herbivores.
TL;DR: Differential expression of plant genes in response to closely related insect species suggest that some elicitors generated by phloem-feeding insects are species-specific and are dependent on the herbivore's developmental stage.
Journal ArticleDOI
Insect host location: a volatile situation.
TL;DR: Paired or clustered olfactory receptor neurons might enable fine-scale spatio-temporal resolution of the complex signals encountered when ubiquitous compounds are used.
Journal ArticleDOI
Multitrophic effects of herbivore-induced plant volatiles in an evolutionary context
Marcel Dicke,Joop J. A. van Loon +1 more
TL;DR: The induction mechanism as well as the ecological consequences in a multitrophic and evolutionary context, and empirical evidence has been obtained that shows that the plant's response can increase plant fitness, in terms of seed production, due to a reduced consumption rate of parasitized herbivores.
Journal ArticleDOI
The effects of abiotic factors on induced volatile emissions in corn plants
TL;DR: Changes in all abiotic factors caused small but significant changes in the relative ratios among the different compounds (quality) in the induced odor blends, except for air humidity.
References
More filters
Journal ArticleDOI
Ecology of infochemical use by natural enemies in a tritrophic context.
Louise E. M. Vet,Marcel Dicke +1 more
TL;DR: It is shown that information from the first and second trophic levels differs in availability and in reliability, a difference that shapes the way infochemicals are used by a species.
Journal ArticleDOI
Exploitation of herbivore-induced plant odors by host-seeking parasitic wasps.
TL;DR: Corn seedlings release large amounts of terpenoid volatiles after they have been fed upon by caterpillars, and females of the parasitic wasp Cotesia marginiventris (Cresson) learn to take advantage of those plant-producedvolatiles to locate hosts when exposed to these volatile in association with hosts or host by-products.
Journal ArticleDOI
Genstat 5 release 3 reference manual
R. W. Payne,Peter W. Lane,P. G. N. Digby,S. A. Harding,P. K. Leech,G. W. Morgan,A. D. Todd,Robin Thompson,G. Tunnicliffe Wilson,S. J. Welham,Robin P. White +10 more
TL;DR: 1.1.
Journal ArticleDOI
An Elicitor of Plant Volatiles from Beet Armyworm Oral Secretion
Hans T. Alborn,Ted C. J. Turlings,Ted C. J. Turlings,Ted C. J. Turlings,T. H. Jones,T. H. Jones,T. H. Jones,G. Stenhagen,G. Stenhagen,G. Stenhagen,John H. Loughrin,John H. Loughrin,John H. Loughrin,James H. Tumlinson,James H. Tumlinson,James H. Tumlinson +15 more
TL;DR: The compound N -(17-hydroxylinolenoyl)-l-glutamine (named here volicitin) was isolated from oral secretions of beet armyworm caterpillars and induced the seedlings to emit volatile compounds that attract parasitic wasps and natural enemies of the herbivores.
Journal ArticleDOI
Host odor perception in phytophagous insects
TL;DR: In the present review selection was made mainly from the literature of the last 20 years.
Related Papers (5)
Herbivore-infested plants selectively attract parasitoids
Ecology of infochemical use by natural enemies in a tritrophic context.
Louise E. M. Vet,Marcel Dicke +1 more