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Gao Y, Li JN, Pu JJ, Tao KX, Zhao XX, Yang QQ. Genome-wide identification and characterization of the HSP gene superfamily in apple snails (Gastropoda: Ampullariidae) and expression analysis under temperature stress. Int J Biol Macromol 2022; 222:2545-2555. [DOI: 10.1016/j.ijbiomac.2022.10.038] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2022] [Revised: 09/28/2022] [Accepted: 10/02/2022] [Indexed: 11/05/2022]
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Stockton DG, Loeb GM. Winter warm-up frequency and the degree of temperature fluctuations affect survival outcomes of spotted-wing drosophila winter morphotypes. JOURNAL OF INSECT PHYSIOLOGY 2021; 131:104246. [PMID: 33930409 DOI: 10.1016/j.jinsphys.2021.104246] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/06/2020] [Revised: 04/22/2021] [Accepted: 04/23/2021] [Indexed: 06/12/2023]
Abstract
Among overwintering Drosophila suzukii, discrete environmental changes in temperature and photoperiod induce a suite of biochemical changes conferring cold tolerance. However, little is known regarding how temperature fluctuations, which can influence metabolic and cellular repair activity, affect survival outcomes in this species. For that reason, we designed three experiments to test the effects of intermittent warm-up periods and the degree of temperature fluctuation on winter-morphotype (WM) D. suzukii survival. We found that at 5 °C, a temperature sufficient to induce reproductive diapause, but warm enough to allow foraging, increasing warm-up frequency (warmed to 25 °C at various interval schedules) was associated with decreased survival. In contrast, when the nightly low temperature was 0 °C, daily fluctuations that warmed the environment to temperatures above freezing (5, or 15 °C) appeared beneficial and resulted in improved survival compared to flies held at 0 °C during day and night. When we next evaluated cold tolerance using a 24-hour stress test assay (-5 °C), we found that again, thermal fluctuations improved survival compared to static freezing conditions. However, we also found that WM D. suzukii exposed to freezing temperatures during acclimation were less cold tolerant, regardless of the thermal fluctuation schedule, indicating that there may be tradeoffs between adequate acclimation temperature, which is required to induce cold tolerance, and the ensuing effects of incidental chill injury. Moving forward, these data, which account for the nuanced interactions between the thermal environment and in the internal physiology of D. suzukii, may help refine seasonal populations models, which aim to forecast pest pressure based on conditions the previous winter.
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Affiliation(s)
- Dara G Stockton
- Department of Entomology, Cornell AgriTech, Geneva, NY 14424, USA.
| | - Gregory M Loeb
- Department of Entomology, Cornell AgriTech, Geneva, NY 14424, USA.
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Tonina L, Giomi F, Sancassani M, Ajelli M, Mori N, Giongo L. Texture features explain the susceptibility of grapevine cultivars to Drosophila suzukii (Diptera: Drosophilidae) infestation in ripening and drying grapes. Sci Rep 2020; 10:10245. [PMID: 32581287 PMCID: PMC7314830 DOI: 10.1038/s41598-020-66567-9] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2019] [Accepted: 05/13/2020] [Indexed: 12/22/2022] Open
Abstract
Grapevine is a well-known host plant of the invasive pest Drosophila suzukii, but its susceptibility to pest oviposition and development greatly depends on the cultivar. To address environmental sustainability during viticultural zoning planning, new vineyard plantation and Integrated Pest Management programmes, it is essential to take pest pressure and cultivar susceptibility into account. To determine the different grapevine cultivars susceptibility to D. suzukii, we tested twelve widely spread cultivars during the ripening period. We also tested three cultivars during the drying period for raisin wine production. The infestation and emergence rates were consequently related to chemical and texture features of the berries to explain the role of skin and pulp characteristics in determining the nature of the susceptibility. Our results showed that susceptibility to D. suzukii infestation varies across cultivars. On ripening grapes, infestation is primarily influenced by skin and pulp firmness, elasticity and consistency. Suitability for egg development resulted mainly related to skin and pulp deformation. In a drying loft, infestation may also occur in relation to skin and pulp consistency. Lastly, we discuss the practical implication of the underestimated role of berry texture in D. suzukii oviposition and emergence success, in both ripening and drying grapes.
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Affiliation(s)
- Lorenzo Tonina
- Università di Padova - Legnaro (Pd), Italy-Department of Agronomy, Food, Natural resources, Animals and Environment (DAFNAE), Legnaro, PD, Italy.
| | - Folco Giomi
- Università di Padova - Legnaro (Pd), Italy-Department of Agronomy, Food, Natural resources, Animals and Environment (DAFNAE), Legnaro, PD, Italy
| | - Manuel Sancassani
- Università di Padova - Legnaro (Pd), Italy-Department of Agronomy, Food, Natural resources, Animals and Environment (DAFNAE), Legnaro, PD, Italy
| | - Matteo Ajelli
- Fondazione Edmund Mach - San Michele all'Adige (Tn), Italy - Genomics and Biology Fruit Crops Department, Research and Innovation Centre, San Michele all'Adige, TN, Italy
| | - Nicola Mori
- Università di Padova - Legnaro (Pd), Italy-Department of Agronomy, Food, Natural resources, Animals and Environment (DAFNAE), Legnaro, PD, Italy.,Università di Verona - Italy - Department of Biotechnology, Verona, Italy
| | - Lara Giongo
- Fondazione Edmund Mach - San Michele all'Adige (Tn), Italy - Genomics and Biology Fruit Crops Department, Research and Innovation Centre, San Michele all'Adige, TN, Italy
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Population genomic and phenotype diversity of invasive Drosophila suzukii in Hawai‘i. Biol Invasions 2020. [DOI: 10.1007/s10530-020-02217-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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Varón-González C, Fraimout A, Debat V. Drosophila suzukii wing spot size is robust to developmental temperature. Ecol Evol 2020; 10:3178-3188. [PMID: 32273979 PMCID: PMC7141071 DOI: 10.1002/ece3.5902] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2019] [Revised: 11/14/2019] [Accepted: 11/15/2019] [Indexed: 12/21/2022] Open
Abstract
Phenotypic plasticity is an important mechanism allowing adaptation to new environments and as such it has been suggested to facilitate biological invasions. Under this assumption, invasive populations are predicted to exhibit stronger plastic responses than native populations. Drosophila suzukii is an invasive species whose males harbor a spot on the wing tip. In this study, by manipulating developmental temperature, we compare the phenotypic plasticity of wing spot size of two invasive populations with that of a native population. We then compare the results with data obtained from wild-caught flies from different natural populations. While both wing size and spot size are plastic to temperature, no difference in plasticity was detected between native and invasive populations, rejecting the hypothesis of a role of the wing-spot plasticity in the invasion success. In contrast, we observed a remarkable stability in the spot-to-wing ratio across temperatures, as well as among geographic populations. This stability suggests either that the spot relative size is under stabilizing selection, or that its variation might be constrained by a tight developmental correlation between spot size and wing size. Our data show that this correlation was lost at high temperature, leading to an increased variation in the relative spot size, particularly marked in the two invasive populations. This suggests: (a) that D. suzukii's development is impaired by hot temperatures, in agreement with the cold-adapted status of this species; (b) that the spot size can be decoupled from wing size, rejecting the hypothesis of an absolute constraint and suggesting that the wing color pattern might be under stabilizing (sexual) selection; and (c) that such sexual selection might be relaxed in the invasive populations. Finally, a subtle but consistent directional asymmetry in spot size was detected in favor of the right side in all populations and temperatures, possibly indicative of a lateralized sexual behavior.
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Affiliation(s)
- Ceferino Varón-González
- Institut de Systématique, Evolution, Biodiversité (ISYEB) Muséum National d'Histoire Naturelle CNRS Sorbonne Université EPHE Université des Antilles Paris France
| | - Antoine Fraimout
- Institut de Systématique, Evolution, Biodiversité (ISYEB) Muséum National d'Histoire Naturelle CNRS Sorbonne Université EPHE Université des Antilles Paris France
- Present address: Ecological Genetics Research Unit Organismal and Evolutionary Biology Research Programme Faculty of Biology and Environmental Sciences Biocenter 3 University of Helsinki Helsinki Finland
| | - Vincent Debat
- Institut de Systématique, Evolution, Biodiversité (ISYEB) Muséum National d'Histoire Naturelle CNRS Sorbonne Université EPHE Université des Antilles Paris France
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Varón-González C, Fraimout A, Delapré A, Debat V, Cornette R. Limited thermal plasticity and geographical divergence in the ovipositor of Drosophila suzukii. ROYAL SOCIETY OPEN SCIENCE 2020; 7:191577. [PMID: 32218976 PMCID: PMC7029920 DOI: 10.1098/rsos.191577] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/23/2019] [Accepted: 11/27/2019] [Indexed: 06/10/2023]
Abstract
Phenotypic plasticity has been repeatedly suggested to facilitate adaptation to new environmental conditions, as in invasions. Here, we investigate this possibility by focusing on the worldwide invasion of Drosophila suzukii: an invasive species that has rapidly colonized all continents over the last decade. This species is characterized by a highly developed ovipositor, allowing females to lay eggs through the skin of ripe fruits. Using a novel approach based on the combined use of scanning electron microscopy and photogrammetry, we quantified the ovipositor size and three-dimensional shape, contrasting invasive and native populations raised at three different developmental temperatures. We found a small but significant effect of temperature and geographical origin on the ovipositor shape, showing the occurrence of both geographical differentiation and plasticity to temperature. The shape reaction norms are in turn strikingly similar among populations, suggesting very little difference in shape plasticity among invasive and native populations, and therefore rejecting the hypothesis of a particular role for the plasticity of the ovipositor in the invasion success. Overall, the ovipositor shape seems to be a fairly robust trait, indicative of stabilizing selection. The large performance spectrum rather than the flexibility of the ovipositor would thus contribute to the success of D. suzukii worldwide invasion.
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Affiliation(s)
- Ceferino Varón-González
- Institut de Systématique, Evolution, Biodiversité (ISYEB), Muséum National d'Histoire Naturelle, CNRS, Sorbonne Université, EPHE, Université des Antilles, 57 rue Cuvier, CP 50, 75005 Paris, France
| | - Antoine Fraimout
- Centre de Biologie pour la Gestion des Populations, UMR CBGP, INRA, CIRAD, IRD, Montpellier SupAgro, University of Montpellier, 755 avenue du Campus Agropolis CS 30016, 34988 Montferrier sur Lez cedex, France
| | - Arnaud Delapré
- Institut de Systématique, Evolution, Biodiversité (ISYEB), Muséum National d'Histoire Naturelle, CNRS, Sorbonne Université, EPHE, Université des Antilles, 57 rue Cuvier, CP 50, 75005 Paris, France
| | - Vincent Debat
- Institut de Systématique, Evolution, Biodiversité (ISYEB), Muséum National d'Histoire Naturelle, CNRS, Sorbonne Université, EPHE, Université des Antilles, 57 rue Cuvier, CP 50, 75005 Paris, France
| | - Raphaël Cornette
- Institut de Systématique, Evolution, Biodiversité (ISYEB), Muséum National d'Histoire Naturelle, CNRS, Sorbonne Université, EPHE, Université des Antilles, 57 rue Cuvier, CP 50, 75005 Paris, France
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