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Exploitation of Herbivore-Induced Plant Odors by Host-Seeking Parasitic Wasps
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. Expand
Airborne signals prime plants against insect herbivore attack.
Green leafy volatiles (GLV), six-carbon aldehydes, alcohols, and esters commonly emitted by plants in response to mechanical damage or herbivory, induced intact undamaged corn seedlings to rapidlyExpand
An Elicitor of Plant Volatiles from Beet Armyworm Oral Secretion
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. Expand
Diurnal cycle of emission of induced volatile terpenoids by herbivore-injured cotton plant.
The diurnal pattern of emission of volatile terpenoids was determined by collecting and analyzing the volatile compounds emitted by cotton plants subjected to feeding damage by beet armyworm larvae in situ, and volatile emission was monitored continuously. Expand
Herbivore-infested plants selectively attract parasitoids
The production by phylogenetically diverse plant species and the exploitation by parasitoids of highly specific chemical signals, keyed to individual herbivore species, indicates that the interaction between plants and the natural enemies of the herbivores that attack them is more sophisticated than previously realized. Expand
Simultaneous analysis of phytohormones, phytotoxins, and volatile organic compounds in plants
Phytohormones regulate the protective responses of plants against both biotic and abiotic stresses by means of synergistic or antagonistic actions referred to as signaling crosstalk. A bottleneck inExpand
Learning of Host-Finding Cues by Hymenopterous Parasitoids
To confront the challenge of finding the often-inconspicuous, well-hidden hosts, parasitoids have developed various sophisticated searching strategies that depend on a vast array of environmental cues. Expand
How caterpillar-damaged plants protect themselves by attracting parasitic wasps.
The studies on the phenomena of herbivore-induced emissions of volatiles in corn and cotton plants and studies conducted by others indicate that the clarity of the volatile signals is high, as they are unique for herbivor damage, produced in relatively large amounts, and easily distinguishable from background odors. Expand
An herbivore elicitor activates the gene for indole emission in maize.
Gene-sequence analysis indicates that Igl and Bx1 are evolutionarily related to the tryptophan synthase alpha subunit, and IGL's enzymatic properties are similar to BX1, a maize enzyme that serves as the entry point to the secondary defense metabolites DIBOA and DIMBOA. Expand
Caterpillar-induced nocturnal plant volatiles repel conspecific females
The demonstration that tobacco plants release temporally different volatile blends and that lepidopteran herbivores use induced plant signals released during the dark phase to choose sites for oviposition adds a new dimension to the understanding of the role of chemical cues in mediating tritrophic interactions. Expand