Journal
INTERNATIONAL JOURNAL OF BIOLOGICAL SCIENCES
Volume 11, Issue 7, Pages 737-751Publisher
IVYSPRING INT PUBL
DOI: 10.7150/ijbs.11786
Keywords
Microplitis mediator; chemosensory receptor gene; odorant receptor; ionotropic receptor; gustatory receptor; expression profile
Categories
Funding
- China National Basic Research Program [2012CB114104]
- National Natural Science Foundation of China [31171858, 31272048, 31321004]
- [31111130203]
- [JP100849]
- Biotechnology and Biological Sciences Research Council [BBS/E/C/00005194] Funding Source: researchfish
- BBSRC [BBS/E/C/00005194] Funding Source: UKRI
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Host-seeking, ovipositional behavior and mating of insects are controlled mainly by odor perception through sensory organs such as antennae. Antennal chemoreception is extremely important for insect survival. Several antennal chemosensory receptors are involved in mediating the odor detection in insects, especially the odorant receptors (ORs) and ionotropic receptors (IRs), to ensure the specificity of the olfactory sensory neuron responses. In the present study, we identified the chemosensory receptor gene repertoire of the parasitoid wasp Microplitis mediator, a generalist endoparasitoid that infests more than 40 types of Lepidopterous larvae and is widely distributed in the Palaearctic region. By transcriptome sequencing of male and female antennae we identified 60 candidate odorant receptors, six candidate ionotropic receptors and two gustatory receptors in M. mediator. The full-length sequences of these putative chemosensory receptor genes were obtained by using the rapid amplification of cDNA ends PCR (RACE-PCR) method. We also conducted reverse transcription PCR (RT-PCR) combined with real-time quantitative PCR (qPCR) for investigating the expression profiles of these chemosensory receptor genes in olfactory and non-olfactory tissues. The tissue-and sex-biased expression patterns may provide insights into the roles of the chemosensory receptor in M. mediator. Our findings support possible future study of the chemosensory behavior of M. mediator at the molecular level.
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