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Li C, Wang H, Bian F, Yao J, Shi L, Chen X. Pupal and Adult Experience Affect Adult Response to Food Odour Components in the Flower-Visiting Butterfly Tirumala limniace. INSECTS 2024; 15:231. [PMID: 38667361 PMCID: PMC11050233 DOI: 10.3390/insects15040231] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/20/2024] [Revised: 03/26/2024] [Accepted: 03/26/2024] [Indexed: 04/28/2024]
Abstract
Butterflies have the ability to learn to associate olfactory information with abundant food sources during foraging. How the co-occurrence of both food and food odours affects the learning behaviour of adults and whether butterflies perceive the odour of their surroundings and develop a preference for that odour during the pupal stage have rarely been tested. We examined the effect of experience with food odour components (α-pinene and ethyl acetate) during the pupal and adult stages on the foraging behaviour of the flower-visiting butterfly Tirumala limniace. We found that α-pinene exposure during the pupal stage changed the foraging preference of newly emerged adults. T. limniace exhibits olfactory learning in the adult stage, and adult learning may influence their previous pupal memory. Moreover, adults' odour preference did not continue to increase over multiple training times. The learning ability of adults for floral odours (α-pinene) was greater than that for non-floral odours (ethyl acetate). In contrast to previous studies, we found that males learned odours more efficiently than females did. This could be attributed to differences in antennal sensilla, affecting sensitivity to compounds and nectar demand between males and females. Our study provides further insight into how olfactory learning helps flower-visiting butterflies use food odours to forage better.
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Affiliation(s)
- Chengzhe Li
- The Key Laboratory for Quality Improvement of Agricultural Products of Zhejiang Province, College of Advanced Agricultural Sciences, Zhejiang A & F University, Hangzhou 311300, China;
| | - Hua Wang
- Department of Ecology, School of Life Sciences, Nanjing University, Nanjing 210023, China;
| | - Fangyuan Bian
- Key Laboratory of State Forestry and Grassland Administration on Bamboo Forest Ecology and Resource Utilization, China National Bamboo Research Center, Hangzhou 310012, China;
| | - Jun Yao
- Institute of Highland Forest Science, Chinese Academy of Forestry, Kunming 650224, China;
| | - Lei Shi
- Institute of Highland Forest Science, Chinese Academy of Forestry, Kunming 650224, China;
| | - Xiaoming Chen
- Research Center of Resource Insect, Chinese Academy of Forestry, Kunming 650224, China
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Yang Y, Ding L, Wang T, Liao H, Tang C. Morphological Characterization of the Antenna and Scent Patch of Three Danaus Species (Papilionoidea: Nymphalidae, Danainae). INSECTS 2024; 15:121. [PMID: 38392540 PMCID: PMC10889466 DOI: 10.3390/insects15020121] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/28/2023] [Revised: 02/04/2024] [Accepted: 02/05/2024] [Indexed: 02/24/2024]
Abstract
The scent system of Danaus is important for the study of butterfly sexual communication and relevant investigations in biomimetics due to its involvement with mimicry. Using light, scanning, and transmission electron microscopy, the morphological characteristics of Danaus' antennae and scent patches of the scent system for three species, D. chrysippus, D. genutia, and D. plexippus, were investigated herein. Their apical clubs of the flagellums contain sensilla trichodea, sensilla chaetica, and sensilla coeloconica. The scent patch scales typically have a tree-like structure in its lumen at the nano-scale. Comparisons were made between the androconial scales and the other scales in scent patches. Rank sum tests showed significant differences in scent patch scales' characteristics between the species, as well as in the ultrastructure of antennal segments between species and sexes. Spearman's correlation tests showed significant correlations between the morphological characteristics of androconial scales in scent patches. Moreover, the antennal characteristics were significantly correlated. The morphological characteristics of the females' antennae were significantly correlated with those of the males' antennae and androconial scales. However, the significance and coefficient of these correlations were inconsistent across species and sexes. This study provides fundamental morphological information that helps in understanding the pheromone recognition system of Danaus.
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Affiliation(s)
- Yaqi Yang
- College of Biotechnology, Jiangsu University of Science and Technology, Zhenjiang 212100, China
- Institute of Leisure Agriculture, Jiangsu Academy of Agricultural Sciences, Nanjing 210014, China
| | - Linyun Ding
- Central Laboratory, Jiangsu Academy of Agricultural Sciences, Nanjing 210014, China
| | - Tong Wang
- Central Laboratory, Jiangsu Academy of Agricultural Sciences, Nanjing 210014, China
| | - Huaijian Liao
- College of Biotechnology, Jiangsu University of Science and Technology, Zhenjiang 212100, China
- Institute of Leisure Agriculture, Jiangsu Academy of Agricultural Sciences, Nanjing 210014, China
| | - Chufei Tang
- Institute of Leisure Agriculture, Jiangsu Academy of Agricultural Sciences, Nanjing 210014, China
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Kor G, Mengal K, Buřič M, Kozák P, Niksirat H. Comparative ultrastructure of the antennae and sensory hairs in six species of crayfish. PeerJ 2023; 11:e15006. [PMID: 36908819 PMCID: PMC10000303 DOI: 10.7717/peerj.15006] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2023] [Accepted: 02/14/2023] [Indexed: 03/09/2023] Open
Abstract
Background Antennae in crayfish are essential for gaining information about the local topography and localising food, chemicals, conspecifics or predator. There are still gaps in the research on the morphology of antennae in decapods compared to other arthropods. Methodology Biometrical and ultrastructural methods were applied using light and cryo-scanning electron microscopies to study the morphology of antennae in six different crayfish species, including marbled crayfish Procambarus virginalis, Mexican dwarf crayfish Cambarellus patzcuarensis, red swamp crayfish Procambarus clarkii, signal crayfish Pacifastacus leniusculus, common yabby Cherax destructor, and spiny-cheek crayfish Faxonius limosus to find their potential morphological differences. Results Significant differences in the antenna length, length and width of each segment to carapace length ratios, and the number of segments were found in the six crayfish species. The ultrastructure revealed differences in the distribution of sensory hairs on the antenna and the morphology of the antennal surface. Conclusions The different morphology of antennae might reflect adaptation to the conditions of their specific habitats. In addition, results showed that a combination of differences in the morphological features and biometrical measurements of antennae could be used for the distinguishment of different studied crayfish species.
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Affiliation(s)
- Golara Kor
- Faculty of Fisheries and Protection of Waters, South Bohemian Research Centre of Aquaculture and Biodiversity of Hydrocenoses, University of South Bohemia in České Budějovice, Vodňany, Czech Republic
| | - Kifayatullah Mengal
- Faculty of Fisheries and Protection of Waters, South Bohemian Research Centre of Aquaculture and Biodiversity of Hydrocenoses, University of South Bohemia in České Budějovice, Vodňany, Czech Republic
| | - Miloš Buřič
- Faculty of Fisheries and Protection of Waters, South Bohemian Research Centre of Aquaculture and Biodiversity of Hydrocenoses, University of South Bohemia in České Budějovice, Vodňany, Czech Republic
| | - Pavel Kozák
- Faculty of Fisheries and Protection of Waters, South Bohemian Research Centre of Aquaculture and Biodiversity of Hydrocenoses, University of South Bohemia in České Budějovice, Vodňany, Czech Republic
| | - Hamid Niksirat
- Faculty of Fisheries and Protection of Waters, South Bohemian Research Centre of Aquaculture and Biodiversity of Hydrocenoses, University of South Bohemia in České Budějovice, Vodňany, Czech Republic
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Chen XL, Li BL, Chen YX, Li GW, Wu JX. Functional analysis of the odorant receptor coreceptor in odor detection in Grapholita molesta (lepidoptera: Tortricidae). ARCHIVES OF INSECT BIOCHEMISTRY AND PHYSIOLOGY 2021; 108:e21837. [PMID: 34293199 DOI: 10.1002/arch.21837] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/18/2021] [Revised: 06/28/2021] [Accepted: 07/02/2021] [Indexed: 06/13/2023]
Abstract
The olfactory system must detect and discriminate various semiochemicals in the environment. In response to such diversity, insects have evolved a family of odorant-gated ion channels composed of a common receptor (coreceptor, Orco) and a ligand-binding tuning odorant receptor (OR) that confers odour specificity. This study aims to examine the expression pattern of Orco gene of Grapholita molesta (GmolOrco) and to elucidate the role of GmolOrco in detecting G. molesta sex pheromone and green leaf volatiles by using gene silencing via RNA interference (RNAi) coupled antennal electrophysiological (EAG). Multiple sequence alignment showed that GmolOrco shared high sequence similarities with the Orco ortholog of lepidopterans. The results of real-time quantitative PCR detection demonstrated that GmolOrco was predominantly expressed in adult antennae and had the highest expression quantity in adult period among the different developmental stages. Compared with the noninjected controls, GmolOrco expression in GmolOrcodouble-stranded RNA (dsRNA)-injected males was reduced to 39.92% and that in females was reduced to 40.43%. EAG assays showed that the responses of GmolOrco-dsRNA injected males to sex pheromones (Z)-8-dodecenyl acetate (Z8-12:OAc) and (Z)-8-dodecenyl alcohol (Z8-12:OH) were significantly reduced, and the GmolOrco-dsRNA-injected female to green leaf volatile (Z)-3-hexenyl acetate also significantly declined. We inferred that Orco-mediated olfaction was different in male and female G. molesta adults and was mainly involved in recognizing the sex pheromones released by female moths.
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Affiliation(s)
- Xiu-Lin Chen
- Shaanxi Province Key Laboratory of Jujube, College of Life Science, Yan'an University, Yan'an, Shaanxi, China
| | - Bo-Liao Li
- Shaanxi Province Key Laboratory of Jujube, College of Life Science, Yan'an University, Yan'an, Shaanxi, China
| | - Yu-Xin Chen
- Shaanxi Province Key Laboratory of Jujube, College of Life Science, Yan'an University, Yan'an, Shaanxi, China
| | - Guang-Wei Li
- Shaanxi Province Key Laboratory of Jujube, College of Life Science, Yan'an University, Yan'an, Shaanxi, China
| | - Jun-Xiang Wu
- Key Laboratory of Plant Protection Resources & Pest Management of the Ministry of Education, College of Plant Protection, Northwest A&F University, Yangling, Shaanxi, China
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Zhang F, Chen J, Ma M, Lu P, Liu S, Guo K, Xu R, Qiao H, Xu CQ. Morphology and distribution of antennal sensilla in the gall midge Gephyraulus lycantha (Diptera: Cecidomyiidae). Micron 2021; 145:103061. [PMID: 33773439 DOI: 10.1016/j.micron.2021.103061] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2020] [Revised: 03/13/2021] [Accepted: 03/17/2021] [Indexed: 11/26/2022]
Abstract
The gall midge Gephyraulus lycantha (Diptera: Cecidomyiidae) is a serious gall-forming pest that causes devastating damage in the wolfberry, Lycium barbarum (Solanaceae) in Northwest China. In the present study, the external morphology and ultrastructure of the antennae and the antennal sensilla of G. lycantha were examined by scanning electron microscopy. The results show that the moniliform antenna of G. lycantha consisted of a scape, pedicel, and flagellum, and exhibited obvious sexual dimorphism. The male antennae were significantly longer than those of females. Moreover, male flagellomeres were spheroidal nodes separated by slender internodes, whereas those of females were cylindrical with no obvious internodes. There were sex and individual differences in antennal segment number. Male antennae had 10 - 16 flagellomeres, most of which had 15, while female antennae consisted of 8 - 14 flagellomeres, most of which had 12. Moreover, a pair of antennae in the same individual had different numbers of flagellomeres. Four types of sensilla were observed along the surface of the antennae, including sensilla chaetica, sensilla trichodea, sensilla coeloconica, and sensilla circumfila. Among the types of sensilla, sensilla chaetica were the longest and most prominent sensilla discovered on the antennal flagellum in both sexes. Sensilla trichodea were widely distributed over the antennal surface, including the scape, pedicel, and flagellum. Sensilla coeloconica were categorized into four subtypes: sensilla coeloconica Ⅰ, sensilla coeloconica Ⅱ, sensilla coeloconica Ⅲ, and sensilla coeloconica IV; however, sensilla coeloconica IV was absent in females. Sensilla circumfila were found only on cecidomyiidae insect antennae and were attached to the surface by a series of stalks, forming loops around each flagellomere. The numbers of all four types of sensilla on the male antennal windward side were significantly higher than those on the leeward side. The probable biological functions of these sensilla were discussed herein based on their morphology and ultrastructure. These results provide an important basis for further research on chemical communication and strategies for the control of G. lycantha, and it will be able to serve future group Taxonomy studies (species of cecidomyiidae), providing new taxonomic characters (general ultrastructural morphology, number of sensilla and antennal segments, distribution of different types of setae, types and subtypes sensilla), which varies between species and subspecies.
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Affiliation(s)
- Fan Zhang
- Institute of Medicinal Plant Development, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, 100193, China
| | - Jun Chen
- Institute of Medicinal Plant Development, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, 100193, China
| | - Mei Ma
- Key Laboratory for Silviculture and Conservation of Ministry of Education, Beijing Forestry University, Beijing, 100083, China
| | - Pengfei Lu
- Key Laboratory for Silviculture and Conservation of Ministry of Education, Beijing Forestry University, Beijing, 100083, China
| | - Sai Liu
- Institute of Medicinal Plant Development, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, 100193, China
| | - Kun Guo
- Institute of Medicinal Plant Development, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, 100193, China
| | - Rong Xu
- Institute of Medicinal Plant Development, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, 100193, China
| | - Haili Qiao
- Institute of Medicinal Plant Development, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, 100193, China.
| | - Chang-Qing Xu
- Institute of Medicinal Plant Development, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, 100193, China.
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