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Chemical Senses Advance Access originally published online on June 4, 2009
Chemical Senses 2009 34(6):503-512; doi:10.1093/chemse/bjp027
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© The Author 2009. Published by Oxford University Press. All rights reserved. For permissions, please e-mail: journals.permissions@oxfordjournals.org

Identification and Expression Pattern of Putative Odorant-Binding Proteins and Chemosensory Proteins in Antennae of the Microplitis mediator (Hymenoptera: Braconidae)

Shuai Zhang1,2, Yong-Jun Zhang1, Hong-Hua Su1, Xi-Wu Gao2 and Yu-Yuan Guo1

1 State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, West Yuanmingyuan Road, Beijing 100193, China 2 Department of Entomology, College of Agriculture and Biotechnology, China Agricultural University, Beijing 100193, China

Correspondence to be sent to: Yu-Yuan Guo, State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, West Yuanmingyuan Road, Beijing 100193, China. e-mail: yuyuanguo{at}hotmail.com


  Abstract

The parasitoids of Cotton Bollworm Microplitis mediator (Hymenoptera: Braconidae) find their hosts through the odor released by stressed plants. In this study, preliminary characterization and isolation of cDNAs from male M. mediator antennal libraries identified 8 putative odorant-binding proteins (OBPs). Real-time polymerase chain reaction method was used to study the expression pattern of these isolated genes. Their gene expression profiles under a wide range of conditions indicated that only 4 OBP genes in M. mediator were antenna specific. The remaining 4 genes are either expressed ubiquitously or strictly regulated in specialized tissues or during different developmental stages. Some OBP genes were gender specific. These findings support that OBPs play dynamic roles during development of M. mediator and are likely to be involved in broader physiological functions.

Key words: antennal cDNA library, expression pattern, Microplitis mediator, odorant-binding proteins

Shuai Zhang and Yong-Jun Zhang contributed equally to this work.

Accepted 26 April 2009


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