Host regulation effects on Heliothis virescens (F.) larvae inducd by teratocytes of Cardiochiles nigriceps Viereck (Lepidoptera, Noctuidae-Hymenoptera, Braconidae)

@article{Pennacchio1992HostRE,
  title={Host regulation effects on Heliothis virescens (F.) larvae inducd by teratocytes of Cardiochiles nigriceps Viereck (Lepidoptera, Noctuidae-Hymenoptera, Braconidae)},
  author={Francesco Pennacchio and S. Bradleigh. Vinson and E. Tremblay},
  journal={Archives of Insect Biochemistry and Physiology},
  year={1992},
  volume={19},
  pages={177-192}
}
Teratocytes deriving from the serosal membrane of Cardiochiles nigriceps Viereck, obtained “in vitro” from embryos hatched on a semidefined medium, were injected at different numbers and in different developmental stages of nonparasitized Heliothis virescens (F.) last instar larvae. Host development was affected by teratocyte injections and the responses registered ranged from normal to complete inhibition of pupation, according to the number of teratocytes injected and the developmental stage… Expand
Biochemical and developmental alterations of Heliothis virescens (F.) (lepidoptera, noctuidae) larvae induced by the endophagous parasitoid Cardiochiles nigriceps viereck (Hymenoptera, braconidae)
TLDR
The data suggest that the host ecdysteroid hormones are not directly involved in the regulation of the parasitoid molt, although high juvenile hormone (JH) levels probably prevent it. Expand
Alteration of ecdysone metabolism in Heliothis virescens (F.) (Lepidoptera: Noctuidae) larvae induced by Cardiochiles nigriceps Viereck (Hymenoptera: Braconidae) teratocytes
TLDR
It is suggested that the inhibition of host pupation observed in parasitized H. virescens larvae is due in part to 20-hydroxyecdysone inactivation through the formation of polar metabolites and C. nigriceps teratocytes seem to play an important role in this biochemical transformation. Expand
REGULATION OF HELIOTHIS VIRESCENS PROTHORACIC GLANDS BY CARDIOCHILES NIGRICEPS POLYDNAVIRUS
TLDR
The results provide further evidence in support of the hypothesis that these cellular activities in prothoracic gland cells are functionally correlated in steroidogenic responses and indirectly demonstrates that C. nigriceps polydnavirus is the major regulating factor involved in the host prothornic gland inactivation. Expand
Prothoracic gland inactivation in Heliothis virescens (F.) (Lepidoptera:Noctuidae) larvae parasitized by Cardiochiles nigriceps Viereck (Hymenoptera:Braconidae).
TLDR
Host C. nigriceps polydnavirus plays a major role in the inactivation of pupally committed host prothoracic glands, while putative factors occurring in the host haemolymph do not seem to be of particular importance at that developmental stage. Expand
Suppression of juvenile hormone esterase in Heliothis virescens by Microplitis demolitor calyx fluid
TLDR
The role of teratocytes in altering host development and the effects of calyx fluid on juvenile hormone esterase activity in H. virescens was investigated and it was suggested that the reduction in host JH ester enzyme activity was not due to a factor in the hemolymph. Expand
Dose‐dependent influence of Microplitis rufiventris factors on developmental rate and growth of last‐instar Spodoptera littoralis larvae
TLDR
Development of supernumerary individuals of the parasitoid in the host larva leads to dose‐related adverse effects on host growth and development and the present study may provide interesting opportunities for studying the physiological bases of host–parasitoid interactions and parasitoids intra‐specific competition in the biological system considered. Expand
Polydnavirus of Microplitis croceipes prolongs the larval period and changes hemolymph protein content of the host, Heliothis virescens
TLDR
Polydnaviruses from certain parasitoid Hymenoptera have been reported to interfere with both host immunity and host development, while teratocytes primarily impacted larvae at the time when larval-pupal transformation processes are initiated. Expand
Developmental changes in teratocytes of the braconid wasp Cotesia congregata in larvae of the tobacco hornworm, Manduca sexta.
TLDR
The endoparasitic wasp Cotesia congregata develops in the hemocoel of larval stages of the tobacco hornworm, Manduca sexta, and teratocytes within a host appeared heterogeneous with respect to their morphological appearance. Expand
Teratocytes of the solitary endoparasitoid Meteorus gyrator (Hymenoptera: Braconidae): morphology, numbers and possible functions
TLDR
The development of teratocytes derived from the eggs of the parasitoid Meteous gyrator (Thun.) in its host, the tomato moth Lacanobia oleracea, indicated that these cells were a source of at least two parasitism-specific proteins. Expand
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References

SHOWING 1-10 OF 38 REFERENCES
Microplitis croceipes teratocytes cause developmental arrest of Heliothis virescens larvae
TLDR
Treatment with hemocyte-and teratocyte-free hemolymph from parasitized larvae, hemocytes from nonparasitized H. virescens, unfertilized M. croceipes eggs, Cotesia congregata teratocytes, or Micrococcus lysodeikticus cells all had very little effect either on larval growth or development time. Expand
Ecdysteroid-titre reduction and developmental arrest of last-instar Heliothis virescens larvae by calyx fluid from the parasitoid Campoletis sonorensis
TLDR
Fifth-instar Heliothis virescens larvae did not pupate after injections of Campoletis sonorensis calyx fluid in or before the burrow-digging stage of development and ecdysteroid production ceased for up to 10 days, indicating that C. sonoracic glands of 5th- instar H. vires censored may be affected by calyx-fluid injection. Expand
Development and possible functions of teratocytes in the host-parasite association☆
TLDR
Parasitism of Heliothis virescens by the parasitoid Cardiochiles nigriceps results in the production of about 200 teratocytes, which grow even when injected into hosts in the absence of the larval parasitoids. Expand
Contributing factors to reduced ecdysteroid titers in Heliothis virescens parasitized by Microplitis croceipes
TLDR
Examination of factors which might contribute to the Heliothis virescens syndrome by comparing parasitized and nonparasitized larvae at specific and correspondingly similar physiological points in their development shows that ecdysone 20-monooxygenase and sterol precursors are not limiting factors, with the possible exception of limited hemolymph sterol at the end of parasitoid development. Expand
Developmental pathology of Heliothis virescens larvae parasitized by Microplitis croceipes: Parasite-mediated host developmental arrest
TLDR
The developmental pathology of Heliothis virescens larvae parasitized by the braconid wasp Microplitis croceipes was examined and parasite larvae were adversely affected by host neck ligation with their pupal plus cocoon weight being proportional to the age of the host at the time of ligation. Expand
The parasitoid Apanteles kariyai inhibits pupation of its host, Pseudaletia separata, via disruption of prothoracicotropic hormone release.
TLDR
Results show that parasitization inhibits secretion and/or synthesis of PTTH and also delays the larval-pupal commitment of the integument by keeping the ecdysteroid level low. Expand
Ultrastructural and functional maturation of teratocytes of Apanteles kariyai
TLDR
During early parasitization of the host, teratocytes function in conjunction with calyx and venom fluids injected into the host with the parasitoid egg to prevent its encapsulation by host hemocytes. Expand
Teratocytes as a source of juvenile hormone activity in a parasitoid-host relationship.
TLDR
It is shown for the first time that ether extracts of teratocytes of Cardiochiles nigriceps Viereck in its host Heliothis virescens (F.) do indeed exert juvenile hormone activity in the galleria wax test. Expand
Correlating pathological symptoms in Heliothis virescens eggs with development of the parasitoid Telenomus heliothidis
TLDR
The parasitoid Telenomus heliothidis was able to develop successfully in Heliothis virescens eggs throughout nearly all phases of host embryogenesis, and its larva did not appear to have an active role in host pathogenesis. Expand
Degeneration of last instar Heliothis virescens prothoracic glands by Campoletis sonorensis polydnavirus
TLDR
Results indicate that C. sonorensis polydnavirus stimulates prothoracic gland degeneration, which may account for the previously reported observation that injection of calyx fluid causes a drastic reduction in hemolymph ecdysteroid titer and consequent developmental arrest. Expand
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