A larval specific OBP able to bind the major female sex pheromone component in Spodoptera exigua (Hübner)
Odorant binding proteins (OBPs) in insects are postulated to solubilize and transport the hydrophobic odorants across the hydrophilic antennal lymph to the olfactory receptors (ORs) located on the dendrite membrane of the sensory neurons. OBPs in adult insects have been intensively reported, but tho...
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KeAi Communications Co., Ltd.
2015-07-01
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| Series: | Journal of Integrative Agriculture |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2095311914608492 |
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| author | Rong JIN Nai-yong LIU Yan LIU Shuang-lin DONG |
| author_facet | Rong JIN Nai-yong LIU Yan LIU Shuang-lin DONG |
| author_sort | Rong JIN |
| collection | DOAJ |
| description | Odorant binding proteins (OBPs) in insects are postulated to solubilize and transport the hydrophobic odorants across the hydrophilic antennal lymph to the olfactory receptors (ORs) located on the dendrite membrane of the sensory neurons. OBPs in adult insects have been intensively reported, but those in larvae are rarely addressed. In our study, a full-length OBP cDNA, namely SexiOBP13, was cloned by RT-PCR and RACE strategy from the heads of Spodoptera exigua larvae. The quantitative real-time PCR (qPCR) measurement indicated that SexiOBP13 was highly expressed in larval head, but very low in other parts of larva and was not detected in any tissues of adult. The binding affinities of SexiOBP13 to plant volatiles and female sex pheromone components were measured by competitive binding assays. Interestingly, SexiOBP13 displayed a high binding affinity (Ki=3.82 μmol L−1) to Z9,E12–14:Ac, the major sex pheromone component of S. exigua, while low affinities to the tested host plant volatiles (Ki>27 μmol L−1). The behavioral tests further confirmed that Z9,E12–14:Ac was indeed active to elicit the behavioral activity of the third instar larvae of S. exigua. Taken together, our results suggest that SexiOBP13 may play a role in reception of female sex pheromone in S. exigua larvae. The ecological significance of the larvae preference to the adult female sex pheromone was discussed. |
| format | Article |
| id | doaj-art-9593d7e4b6d14f149bab5fb38df81493 |
| institution | Kabale University |
| issn | 2095-3119 |
| language | English |
| publishDate | 2015-07-01 |
| publisher | KeAi Communications Co., Ltd. |
| record_format | Article |
| series | Journal of Integrative Agriculture |
| spelling | doaj-art-9593d7e4b6d14f149bab5fb38df814932025-08-20T03:57:04ZengKeAi Communications Co., Ltd.Journal of Integrative Agriculture2095-31192015-07-011471356136610.1016/S2095-3119(14)60849-2A larval specific OBP able to bind the major female sex pheromone component in Spodoptera exigua (Hübner)Rong JIN0Nai-yong LIU1Yan LIU2Shuang-lin DONG3Key Laboratory of Integrated Management of Crop Diseases and Pests, Ministry of Education/College of Plant Protection, Nanjing Agricultural University, Nanjing 210095, P.R.ChinaKey Laboratory of Integrated Management of Crop Diseases and Pests, Ministry of Education/College of Plant Protection, Nanjing Agricultural University, Nanjing 210095, P.R.ChinaKey Laboratory of Integrated Management of Crop Diseases and Pests, Ministry of Education/College of Plant Protection, Nanjing Agricultural University, Nanjing 210095, P.R.ChinaCorrespondence DONG Shuang-lin, Tel: +86-25-84399062; Key Laboratory of Integrated Management of Crop Diseases and Pests, Ministry of Education/College of Plant Protection, Nanjing Agricultural University, Nanjing 210095, P.R.ChinaOdorant binding proteins (OBPs) in insects are postulated to solubilize and transport the hydrophobic odorants across the hydrophilic antennal lymph to the olfactory receptors (ORs) located on the dendrite membrane of the sensory neurons. OBPs in adult insects have been intensively reported, but those in larvae are rarely addressed. In our study, a full-length OBP cDNA, namely SexiOBP13, was cloned by RT-PCR and RACE strategy from the heads of Spodoptera exigua larvae. The quantitative real-time PCR (qPCR) measurement indicated that SexiOBP13 was highly expressed in larval head, but very low in other parts of larva and was not detected in any tissues of adult. The binding affinities of SexiOBP13 to plant volatiles and female sex pheromone components were measured by competitive binding assays. Interestingly, SexiOBP13 displayed a high binding affinity (Ki=3.82 μmol L−1) to Z9,E12–14:Ac, the major sex pheromone component of S. exigua, while low affinities to the tested host plant volatiles (Ki>27 μmol L−1). The behavioral tests further confirmed that Z9,E12–14:Ac was indeed active to elicit the behavioral activity of the third instar larvae of S. exigua. Taken together, our results suggest that SexiOBP13 may play a role in reception of female sex pheromone in S. exigua larvae. The ecological significance of the larvae preference to the adult female sex pheromone was discussed.http://www.sciencedirect.com/science/article/pii/S2095311914608492odorant binding proteinfemale sex pheromonelarval specificitybinding affinitybehavioral response |
| spellingShingle | Rong JIN Nai-yong LIU Yan LIU Shuang-lin DONG A larval specific OBP able to bind the major female sex pheromone component in Spodoptera exigua (Hübner) Journal of Integrative Agriculture odorant binding protein female sex pheromone larval specificity binding affinity behavioral response |
| title | A larval specific OBP able to bind the major female sex pheromone component in Spodoptera exigua (Hübner) |
| title_full | A larval specific OBP able to bind the major female sex pheromone component in Spodoptera exigua (Hübner) |
| title_fullStr | A larval specific OBP able to bind the major female sex pheromone component in Spodoptera exigua (Hübner) |
| title_full_unstemmed | A larval specific OBP able to bind the major female sex pheromone component in Spodoptera exigua (Hübner) |
| title_short | A larval specific OBP able to bind the major female sex pheromone component in Spodoptera exigua (Hübner) |
| title_sort | larval specific obp able to bind the major female sex pheromone component in spodoptera exigua hubner |
| topic | odorant binding protein female sex pheromone larval specificity binding affinity behavioral response |
| url | http://www.sciencedirect.com/science/article/pii/S2095311914608492 |
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