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Xie J, Liu J, Khashaveh A, Tang H, Liu X, Zhao D, Wang Q, Shi W, Liu T, Zhang Y. Two Structural Analogs of Kairomones are Detected by an Odorant Receptor HvarOR28 in the Coccinellid Hippodamia variegata. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2024. [PMID: 39300682 DOI: 10.1021/acs.jafc.4c05493] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 09/22/2024]
Abstract
In natural environments, general plant volatiles and herbivore-induced plant volatiles (HIPVs) serve as critical clues for predatory natural enemies in the search for prey. The insect olfactory system plays a vital role in perceiving plant volatiles including HIPVs. In this study, we found that HIPV (E,E)-4,8,12-trimethyl-1,3,7,11-tridecatetraene (TMTT) and the plant volatile geranyl acetate (GA), two structurally similar chemicals, displayed electrophysiological activities on the antennae of the ladybird Hippodamia variegata, but were only attractive to adult females in behavior. Moreover, mated female ladybirds laid a significantly higher number of eggs on TMTT-treated and GA-treated cotton leaves compared to controls. Screening of female-biased odorant receptors (ORs) from the antennal transcriptomes, performing Xenopus oocytes expression coupled with two-electrode voltage clamp recordings, suggested that HvarOR28 specifically tuned to TMTT and GA. Molecular docking and site-directed mutagenesis revealed that the amino acid residues Tyr143 and Phe81 of HvarOR28 are the key site for binding with TMTT and GA. Furthermore, RNA interference (RNAi) assay demonstrated that HvarOR28-silenced individuals demonstrated a notable decrease in electrophysiological responses, even female adults almost lost behavioral preference for the two compounds. Thus, it could be concluded that HvarOR28 in H. variegata contributes to facilitating egg laying through the perception of TMTT and GA. These findings may help to develop new olfactory modulators based on the behaviorally active ligands of HvarOR28.
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Affiliation(s)
- Jiaoxin Xie
- College of Animal Science, Shanxi Agricultural University, Taigu 030801, China
- State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing 100193, China
| | - Jingtao Liu
- State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing 100193, China
- Sichuan University of Arts and Science, Dazhou 635000, China
| | - Adel Khashaveh
- State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing 100193, China
| | - Haoyu Tang
- State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing 100193, China
- Key Laboratory of Entomology and Pest Control Engineering, College of Plant Protection, Southwest University, Chongqing 400716, China
| | - Xiaoxu Liu
- State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing 100193, China
- College of Plant Protection, Hebei Agricultural University, Baoding 071001, China
| | - Danyang Zhao
- State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing 100193, China
- School of Resources and Environment, Henan Institute of Science and Technology, Xinxiang 453003, China
| | - Qingnan Wang
- State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing 100193, China
| | - Wangpeng Shi
- Department of Entomology, China Agricultural University, Beijing 100193, China
| | - Tinghui Liu
- College of Plant Protection, Hebei Agricultural University, Baoding 071001, China
| | - Yongjun Zhang
- State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing 100193, China
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Yi C, Teng D, Xie J, Tang H, Zhao D, Liu X, Liu T, Ding W, Khashaveh A, Zhang Y. Volatiles from cotton aphid ( Aphis gossypii) infested plants attract the natural enemy Hippodamia variegata. FRONTIERS IN PLANT SCIENCE 2023; 14:1326630. [PMID: 38173929 PMCID: PMC10761428 DOI: 10.3389/fpls.2023.1326630] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/23/2023] [Accepted: 12/07/2023] [Indexed: 01/05/2024]
Abstract
The Aphis gossypii is a major threat of cotton worldwide due to its short life cycle and rapid reproduction. Chemical control is the primary method used to manage the cotton aphid, which has significant environmental impacts. Therefore, prioritizing eco-friendly alternatives is essential for managing the cotton aphid. The ladybird, Hippodamia variegata, is a predominant predator of the cotton aphid. Its performance in cotton plantation is directly linked to chemical communication, where volatile compounds emitted from aphid-infested plants play important roles in successful predation. Here, we comprehensively studied the chemical interaction between the pest, natural enemy and host plants by analyzing the volatile profiles of aphid-infested cotton plants using gas chromatography-mass spectrometry (GC-MS). We then utilized the identified volatile compounds in electrophysiological recording (EAG) and behavioral assays. Through behavioral tests, we initially demonstrated the clear preference of both larvae and adults of H. variegata for aphid-infested plants. Subsequently, 13 compounds, namely α-pinene, cis-3-hexenyl acetate, 4-ethyl-1-octyn-3-ol, β-ocimene, dodecane, E-β-farnesene, decanal, methyl salicylate, β-caryophyllene, α-humulene, farnesol, DMNT, and TMTT were identified from aphid-infested plants. All these compounds were electrophysiologically active and induced detectable EAG responses in larvae and adults. Y-tube olfactometer assays indicated that, with few exceptions for larvae, all identified chemicals were attractive to H. variegata, particularly at the highest tested concentration (100 mg/ml). The outcomes of this study establish a practical foundation for developing attractants for H. variegata and open avenues for potential advancements in aphid management strategies by understanding the details of chemical communication at a tritrophic level.
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Affiliation(s)
- Chaoqun Yi
- State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing, China
- Key Laboratory of Entomology and Pest Control Engineering, College of Plant Protection, Southwest University, Chongqing, China
| | - Dong Teng
- State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing, China
- Key Laboratory of Integrated Management of Crop Diseases and Pests (Ministry of Education), College of Plant Protection, Nanjing Agricultural University, Nanjing, China
| | - Jiaoxin Xie
- State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing, China
- College of Animal Science, Shanxi Agricultural University, Jinzhong, China
| | - Haoyu Tang
- State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing, China
- Key Laboratory of Entomology and Pest Control Engineering, College of Plant Protection, Southwest University, Chongqing, China
| | - Danyang Zhao
- State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing, China
- School of Resources and Environment, Henan Institute of Science and Technology, Xinxiang, China
| | - Xiaoxu Liu
- State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing, China
- National Key Laboratory of Green Pesticide, College of Plant Protection, South China Agricultural University, Guangzhou, China
| | - Tinghui Liu
- College of Plant Protection, Hebei Agricultural University, Baoding, China
| | - Wei Ding
- Key Laboratory of Entomology and Pest Control Engineering, College of Plant Protection, Southwest University, Chongqing, China
| | - Adel Khashaveh
- State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing, China
| | - Yongjun Zhang
- State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing, China
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