Morphological and ultrastructural characterization of olfactory sensilla in Drosophila suzukii: Scanning and transmission electron microscopy |
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| Affiliation: | 1. Korea Research Institute of Bioscience & Biotechnology, Jeongeup 56212, Republic of Korea;2. Department of Biological Science and Biotechnology, Hannam University, Daejeon 34054, Republic of Korea;3. Korea Research Institute of Bioscience & Biotechnology, Daejeon 34141, Republic of Korea;4. The New Zealand Institute for Plant and Food Research, Christchurch 8140, New Zealand;1. State Key Laboratory of Biocontrol, School of Life Sciences/School of Ecology, Sun Yat-sen University, Guangzhou 510275, China;2. Universidade Federal do Espírito Santo, Departamento de Ciências Biológicas, Av. Fernando Ferrari 514, Goiabeiras, 29.075-910, Vitória, ES, Brazil;1. College of Life and Environmental Sciences, Hangzhou Normal University, Hangzhou 311121, Zhejiang, PR China;2. College of Education, Hangzhou Normal University, Hangzhou 311121, Zhejiang, PR China;1. Department of Plant Protection, Science and Research Branch, Islamic Azad University, Tehran, Iran;2. Department of Plant Protection, Isfahan Research and Education Center for Agriculture and Natural Resources, AREEO, Isfahan, Iran;3. Department of Entomology, Tarbiat Modarres University, Tehran, Iran;4. Department of Physics, Science and Research Branch, Islamic Azad University, Tehran, Iran;1. Entomology Research Museum, Department of Entomology, University of California, Riverside, CA 92521, USA;2. Applied Zoology Division, Taiwan Agricultural Research Institute, Council of Agriculture, Executive Yuan, 189 Chung-Cheng Road, Wufeng, Taichung 41362, Taiwan, ROC;3. Department of Plant Protection, Chiayi Agricultural Experiment Station, Taiwan Agricultural Research Institute, 2 Minquan Road, Chiayi 60044, Taiwan, ROC;1. The Botanical Gardens, Graduate School of Science, The University of Tokyo, Tokyo 112–0001, Japan;2. Department of Applied Entomology, Faculty of Agriculture, Alexandria University, Alexandria, Egypt;3. Department of Entomology, National Chung Hsing University, Taichung, Taiwan;4. Laboratory of Systems Ecology, Faculty of Agriculture, Saga University, Saga 840–8502, Japan |
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| Abstract: | Drosophila suzukii is a serious horticultural and quarantine pest, damaging various berry crops. Although the active use of olfactory communication in D. suzukii is well-known, their olfactory sensory system has not been comprehensively reported. Therefore, the present study was carried out to understand the morphology, distribution and ultrastructure of olfactory sensilla present in the antennae and maxillary palps of D. suzukii, through scanning electron microscopy (SEM) and transmission electron microscopy (TEM). The olfactory sensilla on the antennae of D. suzukii in both sexes could be classified into three major morphological types, basiconic, trichoid and coeloconic sensilla, according to their shapes. The antennal basiconic sensilla were further divided into three subtypes and the antennal trichoid sensilla into two subtypes, respectively, according to the size of individual sensillum. In contrast to the antennal olfactory sensilla showing diverse morphology, basiconic sensilla was the only type of olfactory sensilla in the maxillary palps of D. suzukii. The basiconic sensilla in the maxillary palps could be further classified into three subtypes, based on their size. Our SEM and TEM observations indicated that multiple nanoscale pores are present on the surface of all types of olfactory sensilla in the antennae and maxillary palps, except coeloconic sensilla. The difference in the morphological types and the distribution of olfactory sensilla suggests that their olfactory functions are different between antennae and maxillary palps in D. suzukii. The results of this study provide useful information for further studies to determine the function of olfactory sensilla in D. suzukii and to understand their chemical communication system. |
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| Keywords: | Antenna Basiconica Coeloconica Maxillay palp Olfactory sensilla Scanning electron microscopy Transmission electron microscopy Trichodea Wall pore |
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