Interaction of calyx fluid and venom from Microplitis croceipes (Braconidae) on developmental disruption of the natural host, Heliocoverpa zea, and two atypical hosts, Galleria mellonella and Spodoptera exigua

Gupta, P. R.; Ferkovich, Stephen M.

doi:10.1016/s0022-1910(98)00004-3

Cited by 30 publications

(15 citation statements)

References 30 publications

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“…The parasitoid Microplitis croceipes (Cresson) attacks H. zea and has been shown to decrease the growth rate of its host (Jones and Lewis 1971;Gupta and Ferkovich 1998). Using a concept similar to ours, Storer (1999) suggests that the cannibalistic interactions of corn earworm are genotype dependent when larvae are feeding on corn that expresses the toxin produced by Bacillus thuringiensis.…”

Section: Discussionmentioning

confidence: 96%

Interactions between parasitized and unparasitized conspecifics: parasitoids modulate competitive dynamics

Sisterson

Averill

2003

Oecologia

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Parasitism influences many aspects of a host's behavior and physiology. Therefore, parasitism is also likely to influence the competitive ability of the host. Field populations of phytophagous insects are often a mix of parasitized and unparasitized conspecifics and the inclusion of parasitism in their competitive dynamics may alter expected outcomes. We investigated the influence of parasitism by the hymenopteran parasitoid Phanerotoma franklini Gahan on the competitive interactions among larvae of its host Acrobasis vaccinii Riley. We found that parasitized larvae were poorer competitors and required less food to complete development compared to unparasitized larvae. To examine the influence of parasitism on the competitive dynamics of this system, we constructed an individual-based model parameterized with our laboratory data. The model examined the role of resource availability and parasitism rate on larval survival. The model suggests that parasitized larvae (and, hence parasitoids) experience higher levels of mortality from competition than unparasitized larvae. Further, the model also suggests that the decreased consumption of resources by parasitized larvae results in a decline in the occurrence of competition as the parasitism rate increases. We suggest that these observations may be general to many parasitoid-host systems.

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Section: Discussionmentioning

confidence: 96%

Interactions between parasitized and unparasitized conspecifics: parasitoids modulate competitive dynamics

Sisterson

Averill

2003

Oecologia

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“…In many instances, it has been shown that venom enhances the effects of PDVs (Kitano, 1986;Tanaka, 1987) or might provide protection for the eggs during the period between oviposition and expression of PDV genes (Webb and Luckhart, 1994). In addition to their synergistic effects together with PDVs, venom components affect host physiology and development (Digilio et al, 2000;Gupta and Ferkovich, 1998). In other endoparasitoids that do not produce PDVs, venom becomes the only factor in suppression or regulation of the host immune system (Richards and Parkinson, 2000).…”

Section: Introductionmentioning

confidence: 99%

Negative regulation of prophenoloxidase (proPO) activation by a clip-domain serine proteinase homolog (SPH) from endoparasitoid venom

Zhang

Jiang

et al. 2004

Insect Biochemistry and Molecular Biology

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“…Experiments showed that venom alone had no effect on growth, whereas calyx fluid injection produced effects resembling those of parasitism (Doucet and Cusson, 1996b). In Helicoverpa zea parasitized by Microplitis croceipes (Braconidae), venom alone had no effect on growth but synergized the action of calx fluid (Gupta and Ferkovich, 1998). However, when larvae of an atypical host, Galleria mellonella (Pyralidae), were injected with the venom alone, larval growth, pupation, and emergence were reduced indicating that venom might have different functions depending on the host.…”

Section: Venom and Humoral Immunitymentioning

confidence: 99%

Venom proteins from polydnavirus‐producing endoparasitoids: Their role in host‐parasite interactions

Asgari

2006

Arch Insect Biochem Physiol

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Endoparasitoid wasps have evolved various mechanisms to ensure successful development of their progeny, including co-injection of a cocktail of maternal secretions into the host hemocoel, including venom, calyx fluid, and polydnaviruses. The components of each type of secretion may influence host physiology and development independently or in a synergistic fashion. For example, venom fluid consists of several peptides and proteins that promote expression of polydnavirus genes in addition to other activities, such as inhibition of prophenoloxidase activation, inhibition of hemocytes spreading and aggregation, and inhibition of development. This review provides a brief overview of advances and prospects in the study of venom proteins from polydnavirus-producing endoparasitoid wasps with a special emphasis on the role of C. rubecula venom proteins in host-parasitoid interactions.

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Interaction of calyx fluid and venom from Microplitis croceipes (Braconidae) on developmental disruption of the natural host, Heliocoverpa zea, and two atypical hosts, Galleria mellonella and Spodoptera exigua

Cited by 30 publications

References 30 publications

Interactions between parasitized and unparasitized conspecifics: parasitoids modulate competitive dynamics

Interactions between parasitized and unparasitized conspecifics: parasitoids modulate competitive dynamics

Negative regulation of prophenoloxidase (proPO) activation by a clip-domain serine proteinase homolog (SPH) from endoparasitoid venom

Venom proteins from polydnavirus‐producing endoparasitoids: Their role in host‐parasite interactions

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