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Chelonus sp. near curvimaculatus venom proteins: Analysis of their potential role and processing during development of host Trichoplusia ni
Author(s) -
Leluk Jacek,
Jones Davy
Publication year - 1989
Publication title -
archives of insect biochemistry and physiology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.576
H-Index - 66
eISSN - 1520-6327
pISSN - 0739-4462
DOI - 10.1002/arch.940100102
Subject(s) - trichoplusia , biology , venom , host (biology) , hatching , metamorphosis , zoology , parasitoid , trypsin , larva , proteolytic enzymes , parasite hosting , enzyme , parasitism , botany , microbiology and biotechnology , biochemistry , ecology , noctuidae , world wide web , computer science
The venom that Chelonus sp. near curvimaculatus injects into each parasitized Trichoplusia ni egg is entirely injected within the first 8 s of the 19‐s oviposition period, before deposition of the parasitoid egg that is injected during the final 1‐2 s of the oviposition. The parasitization factor, causing precocious metamorphosis of the host, is injected after the venom, but before the parasite egg. The venom by itself does not cause developmental redirection of the host. Chelonus venom proteins are very stable in the host egg during the first 2 days of egg development. Then, on the last day before hatching, they are rapidly degraded by the proteolytic enzymes appearing in 3‐day‐old T. ni eggs. Among those that degrade the venom proteins are serine‐type proteinases, and at least one seems to be a trypsin‐like enzyme.