Role of ectoparasitoid venom in the regulation of haemolymph ecdysteroid titres in a host noctuid moth

Weaver, Robert J.; Marris, G. C.; Olieff, Sarah; Mosson, June H.; Edwards, John

doi:10.1002/(sici)1520-6327(1997)35:1/2<169::aid-arch15>3.3.co;2-j

Cited by 8 publications

(6 citation statements)

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“…In a second eulophid species E. pennicornis, biological tests have shown that the developmental arrest of the host Lacanobia oleracea was caused by one or several venom proteins whose molecular masses were comprised between 43 and 158 kDa (Weaver et al, 1997). Despite numerous works reporting the physiological effects of venoms from ectoparasitoids on growth and metabolism of their hosts (Bocchino and Sullivan, 1981;Shaw, 1981;Rivers et al, 1993;Denlinger, 1994a, b, 1995;Morales-Ramos et al, 1995;Nakamatsu and Tanaka, 2003), the precise molecular mechanisms by which venom proteins could cause such effects remain largely unknown.…”

Section: Proteins and Peptidessupporting

confidence: 84%

Advances and prospects on biosynthesis, structures and functions of venom proteins from parasitic wasps

Moreau

Guillot

2005

Insect Biochemistry and Molecular Biology

100

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Section: Proteins and Peptidessupporting

confidence: 84%

Advances and prospects on biosynthesis, structures and functions of venom proteins from parasitic wasps

Moreau

Guillot

2005

Insect Biochemistry and Molecular Biology

100

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“…Eulophus pennicornis can regulate the haemolymph ecdysteroid titre of host Lacanobia oleracea larvae and thus affect host development (Weaver et al, 1997). Marris et al (2001) found that attacks by the ectoparasitoid E. pennicornis prevented the larvae of L. oleracea from moulting.…”

Section: Koinobiont Parasitismsupporting

confidence: 66%

Ecological mechanisms and prospects for utilization of toxins from parasitic hymenopterans

Wang

Yang

2008

Front. For. China

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Insects in the order Hymenoptera defend themselves, attack prey and regulate hosts using toxins that are effective in small quantities. In this study, advances in the researches on parasitic hymenopteran toxins are summarized in terms of the production, categories, components, properties, ecological functions and mechanisms. The glands that produce venoms derive from the ectoderm tissue and evolve from the accessory glands of the reproductive system. Venoms are excreted by the poison gland or acid gland of mature female wasps and stored in reservoirs. The components of insect toxins are very complicated, and hymenopteran venoms contain alkanes, alcohols, aldehydes, ketones, organic acids, esters, lactones, proteins, polypeptides, enzymes, amines and other compounds. Toxins of parasitic hymenoptera play an important adaptive role. They can increase the probability of successful oviposition by paralyzing hosts, enhancing offspring survival by inhibiting host development and immunoreaction, and improving the nutrition available for their progeny by disturbing the hosts' physiological response. Venoms of the ectoparasitoids often lead to arrested development, permanent paralysis and even death of hosts. These toxins are usually broad-spectrum and act on the central nervous system or at the neuro-muscular junction. While most endoparasitoids are koinobionts, these parasitoids can regulate the physiology and development of the hosts, but no longer paralyze the hosts permanently. Also, they kill the hosts in a concealed but safe position after the hosts cocoon or build their pupal cells. Venoms of koinobiont parasitoids can contain polydnaviruses (PDV) that regulate the growth and development of the hosts by inhibiting the immune system and influencing the metamorphosis of hosts. Thus, PDVs are commensal and mutualistic, but non-pathogenic, with parasitoids at the molecular level. Promising prospects for the utilization of insect toxins, especially as medicines or specific bioinsecticides, are discussed. Because insect toxins are mixtures of complex ingredients and are usually produced in small quantities, isolation and purification of all the ingredients with bioactivity are needed for biochemical and toxicological research and for practical application.

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“…Absence of similar response to a needle prick (Þnal experiment of hormone manipulations) implies that wounding is probably not the causal agent. Other studies, mainly with parasitoids of caterpillars, have shown that venom from the wasp sting, salivary secretions from ectoparasitic larvae, or both can cause behavioral or developmental changes in a host (Coudron and Brandt 1996, Marris et al 1996, Doury et al 1997, Weaver et al 1997.…”

Section: Discussionmentioning

confidence: 72%

Behavioral Changes in Japanese Beetle and Masked Chafer Grubs (Coleoptera: Scarabaeidae) After Parasitism by Tiphiid Wasps (Hymenoptera: Tiphiidae)

Rogers¹,

Cole

Ramaswamy

et al. 2003

Environ Entomol

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Role of ectoparasitoid venom in the regulation of haemolymph ecdysteroid titres in a host noctuid moth

Cited by 8 publications

References 0 publications

Advances and prospects on biosynthesis, structures and functions of venom proteins from parasitic wasps

Advances and prospects on biosynthesis, structures and functions of venom proteins from parasitic wasps

Ecological mechanisms and prospects for utilization of toxins from parasitic hymenopterans

Behavioral Changes in Japanese Beetle and Masked Chafer Grubs (Coleoptera: Scarabaeidae) After Parasitism by Tiphiid Wasps (Hymenoptera: Tiphiidae)

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