Innate immunity: Eggs of Manduca sexta are able to respond to parasitism by Trichogramma evanescens

Abdel-latief, Mohatmed; Hilker, Monika

doi:10.1016/j.ibmb.2007.10.001

Cited by 46 publications

(30 citation statements)

References 63 publications

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“…Previously, egg immune gene induction has been found for Manduca sexta (Gorman et al, 2004) and this immune response also decreases the number of eggs successfully parasitized by a parasitoid wasp (Abdel-latief and Hilker, 2008). We have previously also shown that the eggs of Tribolium castaneum can defend against infection, and that this defense limits bacterial growth rate (Jacobs et al, 2014a;.…”

Section: Discussionmentioning

confidence: 77%

Endogenous egg immune defenses in the yellow mealworm beetle (Tenebrio molitor)

Jacobs

Gallagher

Evison

et al. 2017

Developmental & Comparative Immunology

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In order to survive microbe encounters, insects rely on both physical barriers as well as local and systemic immune responses. Most research focusses on adult or larval defenses however, whereas insect eggs are also in need of protection. Lately, the defense of eggs against microbes has received an increasing amount of attention, be it through endogenous egg defenses, trans-generational immune priming (TGIP) or parental investment. Here we studied the endogenous immune response in eggs and adults of Tenebrio molitor. We show that many immune genes are induced in both adults and eggs. Furthermore, we show that eggs reach comparable levels of immune gene expression as adults. These findings show that the eggs of Tenebrio are capable of an impressive endogenous immune response, and indicate that such inducible egg defenses are likely common in insects.

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Section: Discussionmentioning

confidence: 77%

Endogenous egg immune defenses in the yellow mealworm beetle (Tenebrio molitor)

Jacobs

Gallagher

Evison

et al. 2017

Developmental & Comparative Immunology

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“…On the other hand, H. halys eggs could have developed a defensive response against parasitoid eggs and larvae, similar to the encapsulation/melanisation immune response. Although host-immune response in the egg stage is relatively rare, it has been observed and described for Avetianella longoi (Hymenoptera: Encyrtidae) attacking eggs of the Cerambicidae Phoracantha semipunctata F. and P. recurva Newman and for Trichogramma evanescens Westwood (Hymenoptera: Trichogrammatidae) attacking eggs of Manduca sexta (L.) (Lepidoptera: Sphingidae) (Reed et al 2007;Abdel-Latief and Hilker 2008).…”

Section: Discussionmentioning

confidence: 99%

Can native egg parasitoids adopt the invasive brown marmorated stink bug, Halyomorpha halys (Heteroptera: Pentatomidae), in Europe?

et al. 2015

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Halyomorpha halys was accidentally introduced into Switzerland around 2004 and has recently spread to several additional areas in Europe, with established populations documented in France, Italy, Greece and Hungary. To test whether generalist egg parasitoids of European Pentatomidae have the potential to control H. halys, and whether these could be as effective as their related Asian species, sentinel egg masses of H. halys and six native European pentatomids were exposed in two regions of Switzerland. Freeze-killed sentinel egg masses of H. halys were attacked by the platygastrid Trissolcus cultratus and the eupelmid Anastatus bifasciatus, whereas fresh egg masses of native Pentatomidae occassionally yielded four Scelionidae species: Trissolcus semistriatus, T. scutellaris, T. cultratus and Telenomus chloropus. In no-choice tests, T. chloropus and T. semistratus produced no offspring from fresh H. halys eggs, whereas T. cultratus and T. scutellaris were sporadically able to complete development. Stopping embryogenesis by freezing egg masses of H. halys at -80°C enabled T. cultratus and T. semistriatus to produce a high number of offspring without influencing the behaviour of the parasitoids. In contrast to European platygastrids, the Asian parasitoids Trissolcus japonicus and T. cultratus (Chinese strain) caused significantly higher parasitism of fresh H. halys eggs. Differences in developmental success may be related to less efficient venom of European scelionids injected during oviposition. To date, A. bifasciatus is the only potential candidate for augmentaive biological control of H. halys in Europe as it was the only European parasitoid capable of consistent, successful development on fresh H. halys eggs.

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“…Distinct result was observed when pupae individualized of Bombyx mori L., 1758 (Lepidoptera: Bombycidae) was parasitized by only one female of Palmistichus elaeisis Delvare & LaSalle, 1993 (Hymenoptera: Eulophidae) with 72.72% of pu pae of this host parasitized and no emergence of prog eny (Pereira et al 2010). This suggests that hosts can present defense mechanisms against parasitoids, as in pupae of B. mori, requiring a greater num ber of indi viduals to neutralize its immune system (Ibrahim and Kim 2006, Abdel-latief and Hilker 2007, Strand 2008. The survival of parasitoids is related to the host's ability to provide adequate nutrients for their survival, and the ability of parasitoids to overcome the host immune re sponse (Andrade et al 2010).…”

Section: Discussionmentioning

confidence: 99%

Density ofTrichospilus diatraeae(Hymenoptera: Eulophidae) ParasitizingDiaphania hyalinata(Lepidoptera: Crambidae) Pupae

Silva

Zanuncio

Pereira

et al. 2014

Annals of the Entomological Society of America

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Diaphania hyalinata L. (Lepidoptera: Crambidae) is a key pest of plants in the family Cucurbitaceae, defoliating and reducing photosynthetic area and yield. Trichospilus diatraeae Margabandhu & Cherian, 1942 (Hymenoptera: Eulophidae) parasitizes the pupae of this pest, but its biological and reproductive parameters with this host are unknown. The objective of our study was to characterize the reproduction of T. diatraeae in D. hyalinata pupae with different densities of this parasitoid. Individual D. hyalinata pupae (48 h old) were exposed to different densities of 7'. diatraeae (1:1, 4:1, 8:1, 12:1, 16:1, 20:1, and 24:1). The parasitoid density did not affect the parasitism and emergence rate of this natural enemy. The progeny, sex ratio, longevity, and head capsule width of T. diatraeae males and females decreased with increasing density, and its life cycle was proportional to density increase of T. diatraeae. Densities of up to eight T. diatraeae individuals per D. hyalinata pupae are favorable for the development of this parasitoid.

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Innate immunity: Eggs of Manduca sexta are able to respond to parasitism by Trichogramma evanescens

Cited by 46 publications

References 63 publications

Endogenous egg immune defenses in the yellow mealworm beetle (Tenebrio molitor)

Endogenous egg immune defenses in the yellow mealworm beetle (Tenebrio molitor)

Can native egg parasitoids adopt the invasive brown marmorated stink bug, Halyomorpha halys (Heteroptera: Pentatomidae), in Europe?

Density ofTrichospilus diatraeae(Hymenoptera: Eulophidae) ParasitizingDiaphania hyalinata(Lepidoptera: Crambidae) Pupae

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