1
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Velikaneye BA, Kozak GM. Timing-dependent effects of elevated temperature on reproductive traits in the European corn borer moth. J Evol Biol 2024; 37:1076-1090. [PMID: 39037024 DOI: 10.1093/jeb/voae092] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2023] [Accepted: 07/18/2024] [Indexed: 07/23/2024]
Abstract
Elevated temperature often has life stage-specific effects on ectotherms because thermal tolerance varies throughout ontogeny. Impacts of elevated temperature may extend beyond the exposed life stage if developmental plasticity causes early exposure to carry-over or if exposure at multiple life stages cumulatively produces effects. Reproductive traits may be sensitive to different thermal environments experienced during development, but such effects have not been comprehensively measured in Lepidoptera. In this study, we investigate how elevated temperature at different life stages alters reproduction in the European corn borer moth, Ostrinia nubilalis. We tested effects of exposure to elevated temperature (28 °C) separately or additively during larval, pupal, and adult life stages compared to control temperatures (23 °C). We found that exposure to elevated pupal and adult temperature decreased the number of egg clusters produced, but exposure limited to a single stage did not significantly impact reproductive output. Furthermore, elevated temperature during the pupal stage led to a faster transition to the adult stage and elevated larval temperature altered synchrony of adult eclosion, either by itself or combined with pupal temperature exposure. These results suggest that exposure to elevated temperature during development alters reproduction in corn borers in multiple ways, including through carry-over and additive effects. Additive effects of temperature across life stages are thought to be less common than stage-specific or carry-over effects, but our results suggest thermal environments experienced at all life stages need to be considered when predicting reproductive responses of insects to heatwaves.
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Affiliation(s)
- Brittany A Velikaneye
- Department of Biology, University of Massachusetts Dartmouth, Dartmouth, MA, United States
| | - Genevieve M Kozak
- Department of Biology, University of Massachusetts Dartmouth, Dartmouth, MA, United States
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2
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Sales K, Thomas P, Gage MJG, Vasudeva R. Experimental heatwaves reduce the effectiveness of ejaculates at occupying female reproductive tracts in a model insect. ROYAL SOCIETY OPEN SCIENCE 2024; 11:231949. [PMID: 38721134 PMCID: PMC11076118 DOI: 10.1098/rsos.231949] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/19/2023] [Revised: 02/22/2024] [Accepted: 03/12/2024] [Indexed: 07/31/2024]
Abstract
Globally, heatwaves have become more common with hazardous consequences on biological processes. Research using a model insect (Tribolium castaneum) found that 5-day experimental heatwave conditions damaged several aspects of male reproductive biology, while females remained unaffected. However, females' reproductive fitness may still be impacted, as insects typically store sperm from multiple males in specialized organs for prolonged periods. Consequently, using males which produce sperm with green fluorescent protein (GFP)-tagged sperm nuclei, we visualized in vivo whether thermal stress affects the ejaculate occupancy across female storage sites under two scenarios; (i) increasing time since insemination and (ii) in the presence of defending competitor sperm. We reconfirmed that sperm from heatwave-exposed males sired fewer offspring with previously mated females and provided new scenarios for in vivo distributions of heat-stress-exposed males' sperm. Sperm from heatwave-exposed males occupied a smaller area and were at lower densities across the females' storage sites. Generally, sperm occupancy decreased with time since insemination, and sperm from the first male to mate dominated the long-term storage site. Reassuringly, although heated males' ejaculate was less successful in occupying female tracts, they were not lost from female storage at a faster rate and were no worse than control males in their offensive ability to enter storage sites occupied by competitor sperm. Future work should consider the potential site-specificity of factors influencing sperm storage where amenable.
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Affiliation(s)
- Kris Sales
- Forest Research, Inventory, Forecasting and Operational Support (IFOS), FarnhamGU10 4LH, UK
| | - Paul Thomas
- School of Biological Sciences, University of East Anglia, NorwichNR4 7TJ, UK
| | - Matthew J. G. Gage
- School of Biological Sciences, University of East Anglia, NorwichNR4 7TJ, UK
| | - Ramakrishnan Vasudeva
- School of Biological Sciences, University of East Anglia, NorwichNR4 7TJ, UK
- School of Biology, University of Leeds, LeedsLS2 9JT, UK
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3
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Planelló R, Aquilino M, Beaugeard L, Llorente L, Herrero Ó, Siaussat D, Lécureuil C. Unveiling Molecular Effects of the Secondary Metabolite 2-Dodecanone in the Model Hymenopteran Nasonia vitripennis. TOXICS 2024; 12:159. [PMID: 38393254 PMCID: PMC10892068 DOI: 10.3390/toxics12020159] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/21/2024] [Revised: 02/14/2024] [Accepted: 02/15/2024] [Indexed: 02/25/2024]
Abstract
Over the past decade, multiple studies have suggested that the secondary metabolites produced by plants against herbivorous insects could be used as biopesticides. However, as the molecular mechanism of action of these compounds remains unknown, it is difficult to predict how they would affect non-target insects; thus, their innocuity needs to be clarified. Here, we investigate, from the molecular level to the organism, the responses of a useful parasitic insect Nasonia vitripennis (Walker, 1836) being exposed at the pupae stage for 48 h (up to 6 days) to sublethal doses (5 µg/L and 500 µg/L) of 2-Dodecanone. 2-Dodecanone altered the gene expression of genes related to ecdysone-related pathways, biotransformation, and cell homeostasis. A significant induction of ecdysone response-genes (EcR, usp, E78, Hr4, Hr38) was detected, despite no significant differences in ecdysteroid levels. Regarding the cell homeostasis processes, the gene l(2)efl was differentially altered in both experimental conditions, and a dose-dependent induction of hex81 was observed. 2-Dodecanone also triggered an induction of Cyp6aQ5 activity. Finally, 2-Dodecanone exposure had a significant effect on neither development time, energy reserves, nor egg-laying capacity; no potential genotoxicity was detected. For the first time, this study shows evidence that 2-Dodecanone can modulate gene expression and interfere with the ecdysone signalling pathway in N. vitripennis. This could lead to potential endocrine alterations and highlight the suitability of this organism to improve our general understanding of the molecular effects of plant defences in insects. Our findings provide new insights into the toxicity of 2-Dodecanone that could potentially be explored in other species and under field conditions for plant protection and pest management as a means to reduce reliance on synthetic pesticides.
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Affiliation(s)
- Rosario Planelló
- Molecular Entomology, Biomarkers and Environmental Stress Group, Faculty of Science, National Distance education University (UNED), 28232 Las Rozas de Madrid, Spain; (M.A.); (L.L.); (Ó.H.)
| | - Mónica Aquilino
- Molecular Entomology, Biomarkers and Environmental Stress Group, Faculty of Science, National Distance education University (UNED), 28232 Las Rozas de Madrid, Spain; (M.A.); (L.L.); (Ó.H.)
| | - Laureen Beaugeard
- Institut de Recherche sur la Biologie de l’Insecte (IRBI), CNRS-Université de Tours, 37200 Tours, France;
| | - Lola Llorente
- Molecular Entomology, Biomarkers and Environmental Stress Group, Faculty of Science, National Distance education University (UNED), 28232 Las Rozas de Madrid, Spain; (M.A.); (L.L.); (Ó.H.)
| | - Óscar Herrero
- Molecular Entomology, Biomarkers and Environmental Stress Group, Faculty of Science, National Distance education University (UNED), 28232 Las Rozas de Madrid, Spain; (M.A.); (L.L.); (Ó.H.)
| | - David Siaussat
- Institute of Ecology and Environmental Sciences of Paris, Department of Sensory Ecology, Sorbonne Université, Campus Pierre et Marie Curie, 75005 Paris, France;
| | - Charlotte Lécureuil
- Institut de Recherche sur la Biologie de l’Insecte (IRBI), CNRS-Université de Tours, 37200 Tours, France;
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4
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Yang H, Cai X, Qiu M, Deng C, Xue H, Zhang J, Yang W, XianZhong W. Heat stress induces ferroptosis of porcine Sertoli cells by enhancing CYP2C9-Ras- JNK axis. Theriogenology 2024; 215:281-289. [PMID: 38103405 DOI: 10.1016/j.theriogenology.2023.11.027] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2023] [Revised: 11/16/2023] [Accepted: 11/28/2023] [Indexed: 12/19/2023]
Abstract
Heat stress leads to the accumulation of lipid peroxides in Sertoli cells. Unrestricted lipid peroxidation of catalyzed polyunsaturated fatty acids by Cytochrome P450 (CYP) drive the ferroptosis. However, little is known about the role of CYP cyclooxygenase in heat stress-induced ferroptosis in Sertoli cells. In this study, we investigated the relationship between CYP cyclooxygenase and heat stress-induced ferroptosis in porcine Sertoli cells, as well as whether Ras-JNK signaling is involved in the process. The results showed that heat stress significantly increased the expression of cytochrome P450 cyclooxygenase 2C9 (CYP2C9) and the content of epoxyeicosatrienoic acids (EETs), although there are no significant effect on the expression of cytochrome P450 cyclooxygenase 2J2 (CYP2J2) and cytochrome P450 cyclooxygenase 2C8 (CYP2C8). In addition, heat stress reduced the cell viability, the protein expression level of glutathione peroxidase 4 (GPX4) and Ferritin (all P < 0.01) while increased the level of intracellular reactive oxygen species (ROS) and the protein level of Transferrin receptor 1(TFR1) (both P < 0.01), as well as activating the Ras-JNK signaling pathway. Ferrostatin-1, a ferroptosis-specific inhibitor, reduced ROS levels and the protein level of TFR1 (both P < 0.01), but elevated the cell viability, the protein level of GPX4, and Ferritin (all P < 0.01). Sulfaphenazole, a specific inhibitor of CYP2C9 or two small interfering RNAs targaring CYP2C9 enhanced the cell viability (all P < 0.01), while reduced the content of EETs (all P < 0.01) and inhibited the Ras-JNK signaling and ferroptosis under heat stress. Salirasib, a specific inhibitor of Ras, significantly elevated the cell viability, whereas reduced the level of intracellular ROS and inhibited the phosphorylation of JNK, and alleviated heat stress-induced ferroptosis in porcine Sertoli cells. Notably, there is no effect on the expression of CYP2C9 and the content of EETs. These results indicate that heat stress can induce ferroptosis in Sertoli cells by increasing the expression of CYP2C9 and the content of EETs, which in true activates the Ras-JNK signaling pathway, but there is no feedback from Ras-JNK signaling to the expression of CYP2C9. Our study finds a novel heat stress-induced cell death model of Sertoli cells as well as providing the therapeutic potential for anti-ferroptosis.
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Affiliation(s)
- Huan Yang
- Chongqing Key Laboratory of Forage & Herbivore, College of Veterinary Medicine, Southwest University, Beibei, Chongqing, 400715, PR China
| | - XiaQing Cai
- Chongqing Key Laboratory of Forage & Herbivore, College of Veterinary Medicine, Southwest University, Beibei, Chongqing, 400715, PR China
| | - MeiJia Qiu
- Chongqing Key Laboratory of Forage & Herbivore, College of Veterinary Medicine, Southwest University, Beibei, Chongqing, 400715, PR China
| | - ChengChen Deng
- Chongqing Key Laboratory of Forage & Herbivore, College of Veterinary Medicine, Southwest University, Beibei, Chongqing, 400715, PR China
| | - HongYan Xue
- Chongqing Key Laboratory of Forage & Herbivore, College of Veterinary Medicine, Southwest University, Beibei, Chongqing, 400715, PR China
| | - JiaoJiao Zhang
- Chongqing Key Laboratory of Forage & Herbivore, College of Veterinary Medicine, Southwest University, Beibei, Chongqing, 400715, PR China
| | - Weirong Yang
- Institute of Ecology China West Normal University, Yuying Road No.81, Shunqing District, Nanchong City, Sichuan Province, PR China
| | - Wang XianZhong
- Chongqing Key Laboratory of Forage & Herbivore, College of Veterinary Medicine, Southwest University, Beibei, Chongqing, 400715, PR China.
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5
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Abarca M, Parker AL, Larsen EA, Umbanhowar J, Earl C, Guralnick R, Kingsolver J, Ries L. How development and survival combine to determine the thermal sensitivity of insects. PLoS One 2024; 19:e0291393. [PMID: 38289939 PMCID: PMC10826953 DOI: 10.1371/journal.pone.0291393] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2023] [Accepted: 08/28/2023] [Indexed: 02/01/2024] Open
Abstract
Thermal performance curves (TPCs) depict variation in vital rates in response to temperature and have been an important tool to understand ecological and evolutionary constraints on the thermal sensitivity of ectotherms. TPCs allow for the calculation of indicators of thermal tolerance, such as minimum, optimum, and maximum temperatures that allow for a given metabolic function. However, these indicators are computed using only responses from surviving individuals, which can lead to underestimation of deleterious effects of thermal stress, particularly at high temperatures. Here, we advocate for an integrative framework for assessing thermal sensitivity, which combines both vital rates and survival probabilities, and focuses on the temperature interval that allows for population persistence. Using a collated data set of Lepidopteran development rate and survival measured on the same individuals, we show that development rate is generally limiting at low temperatures, while survival is limiting at high temperatures. We also uncover differences between life stages and across latitudes, with extended survival at lower temperatures in temperate regions. Our combined performance metric demonstrates similar thermal breadth in temperate and tropical individuals, an effect that only emerges from integration of both development and survival trends. We discuss the benefits of using this framework in future predictive and management contexts.
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Affiliation(s)
- Mariana Abarca
- Department of Biological Sciences, Smith College, Northampton, Massachusetts, United States of America
| | - Anna L. Parker
- Department of Biology, Wake Forest University, Winston-Salem, North Carolina United States of America
| | - Elise A. Larsen
- Department of Biology, The University of North Carolina at Chapel Hill, Chapel Hill, North Carolina, United States of America
| | - James Umbanhowar
- Department of Biology, Georgetown University, Washington, District of Columbia, United States of America
| | - Chandra Earl
- Department of Natural Sciences, Bernice Pauahi Bishop Museum, Honolulu, Hawaii, United States of America
| | - Robert Guralnick
- Florida Museum of Natural History, University of Florida, Gainesville, Florida, United States of America
| | - Joel Kingsolver
- Department of Biology, Georgetown University, Washington, District of Columbia, United States of America
| | - Leslie Ries
- Department of Biology, The University of North Carolina at Chapel Hill, Chapel Hill, North Carolina, United States of America
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6
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Mak KW, Price TAR, Dougherty LR. The effect of short-term exposure to high temperatures on male courtship behaviour and mating success in the fruit fly Drosophila virilis. J Therm Biol 2023; 117:103701. [PMID: 37683356 DOI: 10.1016/j.jtherbio.2023.103701] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2023] [Revised: 08/25/2023] [Accepted: 08/25/2023] [Indexed: 09/10/2023]
Abstract
Human-induced climate change is leading to higher average global temperatures and increasingly extreme weather events. High temperatures can have obvious effects on animal survival, particularly in ectotherms. However, the temperature at which organisms become sterile may be significantly lower than the temperature at which other biological functions are impaired. In the fruit fly Drosophila virilis, males are sterilized at temperatures above 34 °C, but are still active and able to mate normally. We investigated the male behavioural changes associated with high-temperature fertility loss. We exposed males to a warming treatment of 34.4 °C or 36.6 °C for 4 h, and then recorded their mating behaviour after being allowed to recover for 24 h. Previous work in this species suggests that males exposed to 34.4 °C lose the ability to produce new sperm, but can utilize mature sperm produced before the heat shock. We therefore predicted that these males would increases their courtship rate, and reduce their choosiness, in order to try to ensure a mating before their remaining mature sperm die. In contrast, over two-thirds of males exposed to 36.6 °C are completely sterile. In standard mating trials, earlier exposure to 34.4 °C or 36.6 °C did not affect male courtship behaviour when compared to control males kept at 23 °C. Exposure to high temperatures also did not alter the extent to which males directed courtship toward females of the same species. However, males exposed to 36.6 °C were significantly slower to mate, and had a reduced likelihood of mating, when compared to control males. Overall, exposure to high temperatures did not alter male courtship behaviour, but did lower their likelihood of mating. This suggests that females can distinguish between normal and heat-sterilized males before mating, and that female mate choice may at least partly mitigate the population-level consequences of high-temperature induced male sterility in this species.
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Affiliation(s)
- Kwan Wai Mak
- Department of Evolution, Ecology and Behaviour, University of Liverpool, Crown Street, Liverpool, L69 7RB, UK
| | - Tom A R Price
- Department of Evolution, Ecology and Behaviour, University of Liverpool, Crown Street, Liverpool, L69 7RB, UK
| | - Liam R Dougherty
- Department of Evolution, Ecology and Behaviour, University of Liverpool, Crown Street, Liverpool, L69 7RB, UK.
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7
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Bressac C, El Sabrout A, Kifouche F, Anne M, Capdevielle-Dulac C, Mougel F, Kaiser L. Hot and cold waves decrease sperm production and bias sex ratio in the parasitoid wasp Cotesia typhae (Hymenoptera, Braconidae). JOURNAL OF INSECT PHYSIOLOGY 2023; 149:104553. [PMID: 37567362 DOI: 10.1016/j.jinsphys.2023.104553] [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: 03/31/2023] [Revised: 08/08/2023] [Accepted: 08/08/2023] [Indexed: 08/13/2023]
Abstract
Parasitoid wasps are haplodiploid, meaning that sperm stored by egg laying females are only used to produce daughters. Thus, the sex ratio of the offspring depends on the availability of sperm after mating. In these insects, males are sensitive to temperature at the pupal stage. This stress leads to subfertility due to a drastic reduction in the number of sperm produced and transferred to females. Experiments were conducted under controlled conditions on the parasitoid wasp Cotesia typhae (Hymenoptera, Braconidae), a natural enemy of the invading pest Sesamia nonagrioides (Lepidoptera, Noctuidae). At 25-27 °C, sperm production was measured for 7 days, and found to reach a plateau at the third day of adult life. It leads to a final amount around 25,000 sperm per male. A male can successfully inseminate at least 10 females, producing predominantly female offspring. Sperm production decreased significantly after 1 day of pupal exposure to heat at 34 or 36 °C and 7 days of cold at 0, 5 or 10 °C. This highlights that both cold and heat are stressful. After mating with one male treated at 10 or 34 °C, females store fewer sperm than the control, and produce fewer daughters. The sex ratio of the offspring is male biased when males experienced temperature stresses during development, like other parasitoid wasps. In the field, C. typhae populations would be affected by heat and cold, at least at the pupal stage. This lowers overwintering risk in case this biological agent was introduced in Europe. This risk is both economical, as companies seek to establish costly continuous production to sell beneficial insects, and ecological as the introduced population would not settle in the ecosystem. Lastly, the transport and storage of this insect of agronomic interest would need to consider temperature variations to ensure successful application.
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Affiliation(s)
- Christophe Bressac
- IRBI, UMR 7261 CNRS, Institut de Recherche sur la Biologie de l'Insecte, Faculté des Sciences et Techniques, Université de Tours, Tours, France.
| | - Ahmed El Sabrout
- IRBI, UMR 7261 CNRS, Institut de Recherche sur la Biologie de l'Insecte, Faculté des Sciences et Techniques, Université de Tours, Tours, France; Applied Entomology and Zoology Department, Faculty of Agriculture (El-Shatby), Alexandria University, 21526 Alexandria, Egypt
| | - Fatma Kifouche
- IRBI, UMR 7261 CNRS, Institut de Recherche sur la Biologie de l'Insecte, Faculté des Sciences et Techniques, Université de Tours, Tours, France
| | - Melissa Anne
- EGCE, Université Paris-Saclay, CNRS, IRD, UMR Évolution, Génomes, Comportement et Écologie, 91190 Gif-sur-Yvette, France
| | - Claire Capdevielle-Dulac
- EGCE, Université Paris-Saclay, CNRS, IRD, UMR Évolution, Génomes, Comportement et Écologie, 91190 Gif-sur-Yvette, France
| | - Florence Mougel
- EGCE, Université Paris-Saclay, CNRS, IRD, UMR Évolution, Génomes, Comportement et Écologie, 91190 Gif-sur-Yvette, France
| | - Laure Kaiser
- EGCE, Université Paris-Saclay, CNRS, IRD, UMR Évolution, Génomes, Comportement et Écologie, 91190 Gif-sur-Yvette, France
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8
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Simmons LW, Lovegrove M, Du X(B, Ren Y, Thomas ML. Humidity stress and its consequences for male pre- and post-copulatory fitness traits in an insect. Ecol Evol 2023; 13:e10244. [PMID: 37404700 PMCID: PMC10316369 DOI: 10.1002/ece3.10244] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2023] [Revised: 06/13/2023] [Accepted: 06/15/2023] [Indexed: 07/06/2023] Open
Abstract
Global declines in insect abundance are of significant concern. While there is evidence that climate change is contributing to insect declines, we know little of the direct mechanisms responsible for these declines. Male fertility is compromised by increasing temperatures, and the thermal limit to fertility has been implicated as an important factor in the response of insects to climate change. However, climate change is affecting both temperature and hydric conditions, and the effects of water availability on male fertility have rarely been considered. Here we exposed male crickets Teleogryllus oceanicus to either low or high-humidity environments while holding temperature constant. We measured water loss and the expression of both pre- and postmating reproductive traits. Males exposed to a low-humidity environment lost more water than males exposed to a high-humidity environment. A male's cuticular hydrocarbon profile (CHC) did not affect the amount of water lost, and males did not adjust the composition of their CHC profiles in response to hydric conditions. Males exposed to a low-humidity environment were less likely to produce courtship song or produced songs of low quality. Their spermatophores failed to evacuate and their ejaculates contained sperm of reduced viability. The detrimental effects of low-humidity on male reproductive traits will compromise male fertility and population persistence. We argue that limits to insect fertility based on temperature alone are likely to underestimate the true effects of climate change on insect persistence and that the explicit incorporation of water regulation into our modeling will yield more accurate predictions of the effects of climate change on insect declines.
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Affiliation(s)
- Leigh W. Simmons
- Centre for Evolutionary Biology, School of Biological SciencesThe University of Western AustraliaPerthWestern AustraliaAustralia
| | - Maxine Lovegrove
- Centre for Evolutionary Biology, School of Biological SciencesThe University of Western AustraliaPerthWestern AustraliaAustralia
| | - Xin (Bob) Du
- Harry Butler InstituteMurdoch UniversityPerthWestern AustraliaAustralia
| | - Yonglin Ren
- Harry Butler InstituteMurdoch UniversityPerthWestern AustraliaAustralia
| | - Melissa L. Thomas
- Harry Butler InstituteMurdoch UniversityPerthWestern AustraliaAustralia
- CSIRO Health and BiosecurityCSIRO Land and WaterFloreatWestern AustraliaAustralia
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9
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Augustin J, Bourgeois G, Brodeur J, Boivin G. Low and high temperatures decrease the mating success of an egg parasitoid and the proportion of females in the population. J Therm Biol 2022; 110:103382. [DOI: 10.1016/j.jtherbio.2022.103382] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2021] [Revised: 04/06/2022] [Accepted: 10/21/2022] [Indexed: 11/21/2022]
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10
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The role of ALOX15B in heat stress-induced apoptosis of porcine sertoli cells. Theriogenology 2022; 185:6-15. [DOI: 10.1016/j.theriogenology.2022.03.018] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2021] [Revised: 03/15/2022] [Accepted: 03/17/2022] [Indexed: 01/03/2023]
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11
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Nasehi SF, Fathipour Y, Asgari S, Mehrabadi M. Environmental Temperature, but Not Male Age, Affects Wolbachia and Prophage WO Thereby Modulating Cytoplasmic Incompatibility in the Parasitoid Wasp, Habrobracon Hebetor. MICROBIAL ECOLOGY 2022; 83:482-491. [PMID: 33969432 DOI: 10.1007/s00248-021-01768-x] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/15/2021] [Accepted: 04/27/2021] [Indexed: 06/12/2023]
Abstract
Wolbachia is an endosymbiotic bacterium found in many species of arthropods and manipulates its host reproduction. Cytoplasmic incompatibility (CI) is one of the most common manipulations that is induced when an uninfected female mates with a Wolbachia-infected male. The CI factors (cifA and cifB genes) are encoded by phage WO that naturally infects Wolbachia. Here, we questioned whether an environmental factor (temperature) or host factor (male age) affected the strength of the CI phenotype in the ectoparasitoid wasp, Habrobracon hebetor. We found that temperature, but not male age, results in reduced CI penetrance. Consistent with these results, we also found that the expression of the cif CI factors decreased in temperature-exposed males but was consistent across aging male wasps. Similar to studies of other insect systems, cifA showed a higher expression level than cifB, and male hosts showed increased cif expression relative to females. Our results suggest that prophage WO is present in the Wolbachia-infected wasps and expression of cif genes contributes to the induction of CI in this insect. It seems that male aging has no effect on the intensity of CI; however, temperature affects Wolbachia and prophage WO titers as well as expression levels of cif genes, which modulate the CI level.
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Affiliation(s)
- Seyede Fatemeh Nasehi
- Department of Entomology, Faculty of Agriculture, Tarbiat Modares University, Tehran, Iran
| | - Yaghoub Fathipour
- Department of Entomology, Faculty of Agriculture, Tarbiat Modares University, Tehran, Iran
| | - Sassan Asgari
- School of Biological Sciences, The University of Queensland, Brisbane, QLD, Australia
| | - Mohammad Mehrabadi
- Department of Entomology, Faculty of Agriculture, Tarbiat Modares University, Tehran, Iran.
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12
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Bawa SA, Gregg PC, Del Socorro AP, Miller C, Andrew NR. Exposure of Helicoverpa punctigera pupae to extreme temperatures for extended periods negatively impacts on adult population dynamics and reproductive output. J Therm Biol 2021; 101:103099. [PMID: 34879917 DOI: 10.1016/j.jtherbio.2021.103099] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2021] [Revised: 08/18/2021] [Accepted: 09/14/2021] [Indexed: 10/20/2022]
Abstract
Understanding the impact that heat stress has on critical life stages of an organism is essential when assessing population responses to extreme events. Heat stress may occur as repeated small-scale events or as a single prolonged event, which may cause different outcomes to the organism. Here, we subjected Helicoverpa punctigera (Wallengren) pupae to two temperatures (44.2 °C and 43 °C) and two exposure treatments - a single 3-h prolonged exposure prolonged and three repeated 1-h exposure period with 24 h recovery time between bouts - to assess the biological traits of individuals. The maximum temperatures were used as they were just below the critical thermal maximum (CTmax) 47.3 °C ± 0.3 °C of pupae for which they could survive exposure. Adults in the prolonged and repeated heat-stressed treatments had 1.70 and 3.34 more days to emergence and 1.57 and 3.30 days extended life span compared to those kept under a constant 25 °C temperature (control treatment). Both pre-oviposition and oviposition periods were extended in the heat-stressed groups. Fecundity in the prolonged and repeated heat-stressed females was reduced by 34.7% and 65.5% eggs in the 43 °C treatment group and by 94.3% and 93.6% eggs in the 44.2 °C treatment group compared to the control group. No eggs from females in either the prolonged and repeated heat-stress groups hatched. We establish that heat stress on pupae can influence the population dynamics of H. punctigera by reducing fecundity as well as extending the pre oviposition period, and affecting adult development. Also, as heat exposure on the parent generation resulted in no offspring production, it is critical to assess cross-generational responses to extreme heat stress.
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Affiliation(s)
- Samuel A Bawa
- Centre for Behavioural and Physiological Ecology, Zoology, University of New England, Armidale, NSW, 2351, Australia; Insect Ecology Lab, Natural History Museum, School of Environmental and Rural Science, University of New England, Armidale, NSW, 2351, Australia; Asuansi Agric. Station, Box 520, Cape Coast, Ghana.
| | - Peter C Gregg
- Agronomy, School of Environmental and Rural Science, University of New England, Armidale, NSW, 2351, Australia
| | - Alice P Del Socorro
- Agronomy, School of Environmental and Rural Science, University of New England, Armidale, NSW, 2351, Australia
| | - Cara Miller
- School of Science and Technology, University of New England, Armidale, NSW, 2351, Australia
| | - Nigel R Andrew
- Centre for Behavioural and Physiological Ecology, Zoology, University of New England, Armidale, NSW, 2351, Australia; Insect Ecology Lab, Natural History Museum, School of Environmental and Rural Science, University of New England, Armidale, NSW, 2351, Australia
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13
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Baur J, Jagusch D, Michalak P, Koppik M, Berger D. The mating system affects the temperature sensitivity of male and female fertility. Funct Ecol 2021. [DOI: 10.1111/1365-2435.13952] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Affiliation(s)
- Julian Baur
- Department of Ecology and Genetics Uppsala University Uppsala Sweden
| | - Dorian Jagusch
- Department of Ecology and Genetics Uppsala University Uppsala Sweden
- Organismal and Evolutionary Biology Research Program Faculty of Biological and Environmental Sciences University of Helsinki Helsinki Finland
| | - Piotr Michalak
- Department of Ecology and Genetics Uppsala University Uppsala Sweden
| | - Mareike Koppik
- Department of Ecology and Genetics Uppsala University Uppsala Sweden
| | - David Berger
- Department of Ecology and Genetics Uppsala University Uppsala Sweden
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14
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Przybyla K, Michez D, Zambra E, Anselmo A, Hennebert E, Rasmont P, Martinet B. Effects of Heat Stress on Mating Behavior and Colony Development in Bombus terrestris (Hymenoptera: Apidae). Front Ecol Evol 2021. [DOI: 10.3389/fevo.2021.748405] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Climate change is related to an increase in the frequency and intensity of extreme events such as heatwaves. In insect pollinators, heat exposure is associated with direct physiological perturbations, and in several species, could lead to a decrease of fitness related to a decrease in fertility. Here we developed a new experimental protocol in controlled conditions to assess if the exposure to high temperatures could modify the attractiveness and fertility of Bombus terrestris males. Our results show that virgin queens of B. terrestris do not have preferences between the pheromonal secretions of heat-exposed and control males. Moreover, mating with a heat-exposed male has no impact on the copulation behavior and the development of the nest (brood composition). We advise to extend trials to cover a range of wild and heat-sensitive species on multiple generations to better understand the impact of heat waves on the bumblebee communities.
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15
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Sperm Production Is Reduced after a Heatwave at the Pupal Stage in the Males of the Parasitoid Wasp Microplitisrufiventris Kok (Hymenoptera; Braconidae). INSECTS 2021; 12:insects12100862. [PMID: 34680631 PMCID: PMC8539703 DOI: 10.3390/insects12100862] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/21/2021] [Revised: 08/31/2021] [Accepted: 09/18/2021] [Indexed: 11/23/2022]
Abstract
Simple Summary Biocontrol with natural enemies of insect pests needs an optimal reproduction of beneficial insects. Most insects are sensitive to heat, and many males suffer from sperm decrease when exposed to warmth during their development. It is dramatic in hymenoptera because males are issued from the development of unfertilized oocytes and only females develop from fertilized eggs. The sex ratio of populations then results from the availability of sperm for egg laying females. Microplitisrufiventris is a parasite of the cotton worm; this moth is a major pest for cotton fields in Egypt. Because the temperature is high in Egypt, reproduction of M. rufiventris must be studied to optimize its use in the fields. We conducted experiments to measure the sperm number of males after heat periods during their development. It shows that M. rufiventris males have less sperm than controls when they were exposed to 36 °C and 40 °C short periods during their development. Moreover, those males live shorter than males that were maintained at 25 °C. In conclusion, we found, males to be sensitive to heat waves, which results in lower fertility, resulting in a lower availability of sperm for females leading to a sex ratio bias. It may lead to a decrease of the efficacy of biocontrol in cotton fields. Abstract Understanding reproduction is essential for controlling pests and supporting beneficial insects. Among the many factors allowing optimal reproduction, sperm availability is key to sex ratio control in hymenopteran parasitoids since males are haploid and only females come from fertilization. Microplitisrufiventris (Hymenoptera; Braconidae) is a solitary endoparasitoid of some noctuids. This insect could be used for the control of the cotton leafworm Spodopteralittoralis. Under controlled conditions, sperm quantity was measured in virgin males at 1, 5, 10, and 15 days; it increases in adult males until the fifth day. Sperm stock of control males increased from 2500 at one day to 6700 at 15 days. With the control climatic condition being 25 °C, we tested the effects of a time-limited increase of temperature that can be found in Egypt (36 and 40 °C) during one day at the early pupal stage. Emerging males had 1500 and 420 sperm at 36 and 40 °C, respectively; both lived shorter than the control. The sperm potential of males is dependent on both age and temperature during the early pupal stage. It could have dramatic consequences on the sex ratio of M. rufiventris in natural and controlled populations.
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16
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Zhang J, Tang Y, Huang J. The Effects of Temperature on the Development, Morphology, and Fecundity of Aenasius bambawalei (= Aenasius arizonensis). INSECTS 2021; 12:insects12090833. [PMID: 34564272 PMCID: PMC8471986 DOI: 10.3390/insects12090833] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/13/2021] [Revised: 09/08/2021] [Accepted: 09/08/2021] [Indexed: 11/17/2022]
Abstract
Simple Summary During biological invasions, insect pest outbreaks often occur because they escape the control of natural enemies from their place of origin. However, some natural enemies can migrate with pests to effectively inhibit their damage. Whether temperature changes can shorten or enhance the reproductive developmental period of accompanying natural enemies is an important determinant of whether they can effectively migrate with pests. Aenasius bambawalei is a predominant accompanying parasitoid of the important invasive pest Phenacoccus solenopsis. To understand the effect of temperature changes on the development of the reproductive systems of this parasitoid, we compared differences in its development, morphology, and fecundity under different temperatures. The results showed that high temperature could significantly shorten the pupal developmental duration, increase the length of the hind tibia, and accelerate gonad development. Our results indicated that moderately high temperature was conducive to the reproduction and development of the parasitoid and may be related to the more females offspring. This is the first report of the impact of high temperature on the pupal development, morphology, and fecundity of A. bambawalei. Abstract The effects of high temperature on the developmental, morphological, and fecundity characteristics of insects, including biological invaders and their accompanying natural enemies, are clear. Phenacoccus solenopsis (Homoptera: Pseudococcidae) is an aggressive invasive insect pest worldwide. Aenasius bambawalei (=Aenasius arizonensis Girault) (Hymenoptera: Encyrtidae) is a predominant accompanying parasitoid of this mealybug. Our previous studies showed that temperature change induced an increase in the female offspring ratio of A. bambawalei. However, whether this increase is the result of a shortened or enhanced development period of the reproductive systems of A. bambawalei remains unknown. Here, we compared the pupal development, hind tibia of female adults, and fecundity of A. bambawalei under different temperatures to clarify the development and morphological changes induced by high temperature and to better understand its potential as an accompanying natural enemy. Our results showed that, at a high temperature (36 °C), the pupal developmental duration of A. bambawalei was only 0.80 times that of the control, and the length of the hind tibia was 1.16 times that of the control. Moreover, high temperature accelerated the developmental rate of gonads and increased the numbers of eggs and sperm. These results indicated that experimental warming shortened the pupal developmental duration, altered the hind tibia length of female adults, and facilitated the fecundity of A. bambawalei. These findings will help to understand the adaptation mechanisms of accompanying natural enemies. Furthermore, these findings will help to make use of this behavior to effectively control invasive pests.
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Affiliation(s)
- Juan Zhang
- Zhejiang Institute of Landscape Plants and Flowers/Zhejiang Xiaoshan Institute of Cotton & Bast Fiber Crops, Hangzhou 311251, China; (J.Z.); (Y.T.)
| | - Yayuan Tang
- Zhejiang Institute of Landscape Plants and Flowers/Zhejiang Xiaoshan Institute of Cotton & Bast Fiber Crops, Hangzhou 311251, China; (J.Z.); (Y.T.)
| | - Jun Huang
- Zhejiang Institute of Landscape Plants and Flowers/Zhejiang Xiaoshan Institute of Cotton & Bast Fiber Crops, Hangzhou 311251, China; (J.Z.); (Y.T.)
- State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agro-Products, Institute of Plant Protection and Microbiology, Zhejiang Academy of Agricultural Sciences, Hangzhou 310021, China
- Correspondence: ; Tel.: +86-571-8641-9057
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17
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Shadmany J, Lee SF, Taylor PW. Real-time PCR-based Y-specific sperm quantification assay in Queensland fruit fly: Insights to patterns of sperm storage. INSECT MOLECULAR BIOLOGY 2021; 30:315-324. [PMID: 33527600 DOI: 10.1111/imb.12697] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/02/2020] [Revised: 12/23/2020] [Accepted: 01/06/2021] [Indexed: 06/12/2023]
Abstract
Studies of reproductive biology in insects often require quantification of sperm production, transfer or storage. Here, we develop a quantitative real-time PCR-based assay using a Y-specific marker for quantification of sperm from spermathecae of female Queensland fruit fly ('Q-fly'), overcoming constraints typical of traditional sperm quantification methods. The assay enables accurate and reliable quantification of as few as 50 sperms and provides a means to analyse large numbers of samples with flexible timing. The real-time PCR method enables revised understanding of how many sperms are stored by female Q-flies, the distribution of storage between the two spermathecae and the relationship between copula duration and sperm storage. Real-time PCR assays based on Y-specific markers provide an effective solution for sperm quantification in tephritid flies, as well as in other insects and potentially other animals with sperm storage organs.
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Affiliation(s)
- J Shadmany
- Applied BioSciences, Macquarie University, North Ryde, New South Wales, Australia
| | - S F Lee
- Applied BioSciences, Macquarie University, North Ryde, New South Wales, Australia
- Commonwealth Scientific and Industrial Research Organisation, Black Mountain, ACT, Australia
| | - P W Taylor
- Applied BioSciences, Macquarie University, North Ryde, New South Wales, Australia
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18
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Sales K, Vasudeva R, Gage MJG. Fertility and mortality impacts of thermal stress from experimental heatwaves on different life stages and their recovery in a model insect. ROYAL SOCIETY OPEN SCIENCE 2021; 8:201717. [PMID: 33959335 PMCID: PMC8074959 DOI: 10.1098/rsos.201717] [Citation(s) in RCA: 34] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/09/2020] [Accepted: 02/03/2021] [Indexed: 05/10/2023]
Abstract
With climate change creating a more volatile atmosphere, heatwaves that create thermal stress for living systems will become stronger and more frequent. Using the flour beetle Tribolium castaneum, we measure the impacts of thermal stress from experimental heatwaves in the laboratory on reproduction and survival across different insect life stages, and the extent and pace of any recovery. We exposed larvae, pupae, juvenile and mature adult male beetles to 5-day periods of heat stress where temperatures were maintained at either 40°C or 42°C, a few degrees above the 35°C optimum for this species' population productivity, and then measured survival and reproduction compared with controls at 30°C. Mortality due to thermal stress was greatest among juvenile life stages. Male reproductive function was specifically damaged by high temperatures, especially if experienced through pupal or immature life stages when complete sterility was shown at reproductive maturity; larval exposure did not damage adult male fertility. High temperatures impaired testis development and the production of viable sperm, with damage being strongest when experienced during pupal or juvenile adult stages. Despite this disruption, males recovered from heat stress and, depending on the stage of exposure, testis size, sperm production and fertility returned to normal 15-28 days after exposure. Our experiments reveal how thermal stress from heatwave conditions could impact on insect survival and reproduction across different life stages, and the potential and timescales of recovery.
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Affiliation(s)
- Kris Sales
- School of Biological Sciences, University of East Anglia, Norwich Research Park, Norwich NR4 7TJ, UK
| | - Ramakrishnan Vasudeva
- School of Biological Sciences, University of East Anglia, Norwich Research Park, Norwich NR4 7TJ, UK
| | - Matthew J. G. Gage
- School of Biological Sciences, University of East Anglia, Norwich Research Park, Norwich NR4 7TJ, UK
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19
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Martinet B, Zambra E, Przybyla K, Lecocq T, Anselmo A, Nonclercq D, Rasmont P, Michez D, Hennebert E. Mating under climate change: Impact of simulated heatwaves on the reproduction of model pollinators. Funct Ecol 2020. [DOI: 10.1111/1365-2435.13738] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Affiliation(s)
- Baptiste Martinet
- Laboratory of Zoology Research Institute of Biosciences University of Mons Mons Belgium
- Evolutionary Biology & Ecology Université Libre de Bruxelles Bruxelles Belgium
| | - Ella Zambra
- Laboratory of Zoology Research Institute of Biosciences University of Mons Mons Belgium
| | - Kimberly Przybyla
- Laboratory of Zoology Research Institute of Biosciences University of Mons Mons Belgium
| | - Thomas Lecocq
- Laboratory of Zoology Research Institute of Biosciences University of Mons Mons Belgium
- INRAEURAFPAUniversity of Lorraine Nancy France
| | - Abigaël Anselmo
- Laboratory of Zoology Research Institute of Biosciences University of Mons Mons Belgium
| | - Denis Nonclercq
- Laboratory of Histology Research Institute of BiosciencesUniversity of Mons Mons Belgium
| | - Pierre Rasmont
- Laboratory of Zoology Research Institute of Biosciences University of Mons Mons Belgium
| | - Denis Michez
- Laboratory of Zoology Research Institute of Biosciences University of Mons Mons Belgium
| | - Elise Hennebert
- Laboratory of Cell Biology Research Institute of BiosciencesUniversity of Mons Mons Belgium
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20
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Bredlau JP, El-Sabrout AM, Bressac C. Reproductive context of extremely short sperm in the parasitic wasp Cotesia congregata (Hymenoptera: Braconidae). Biol J Linn Soc Lond 2020. [DOI: 10.1093/biolinnean/blaa111] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
Abstract
Among adaptive traits under sexual selection, the length of spermatozoa shows high interspecific variation. In insects, extremes exist for both short and long sperm. The spermatozoa of the endoparasitic wasp Cotesia congregata (Say) are the shortest flagellated sperm described in animals, 6.6 µm in length. By comparison, the sperm of Drosophila bifurca are almost 6000 times longer. Thus, C. congregata has the potential to shed light on the selection pressures that drive variation in sperm length in relation to their production and use. The reproductive organs, sperm counts, controlled oviposition and sex ratios were investigated. The testes showed stratified differentiation stages of spermatogenesis, and sperm counts revealed continuous spermatogenesis in the late pupal stage. The small female spermatheca stored ~1000 sperm, resulting in an extremely high sperm concentration. The number of progeny per brood decreased over time until depletion of eggs. Females produced up to 370 daughters, corresponding to the effective use of 34% of the average sperm stock. Haploid males made up a greater proportion of broods in later parasitisms. Sperm miniaturization may be an adaptation to transfer increased quantities for the entire reproductive life of females in the absence of sperm competition but in the reduced space offered by the spermatheca.
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Affiliation(s)
- Justin P Bredlau
- Integrative Life Sciences, Virginia Commonwealth University, Richmond, VA, USA
| | - Ahmed M El-Sabrout
- Research Institute for Insect Biology, UMR CNRS 7261, University of Tours, Tours, France
- Department of Applied Entomology and Zoology, Faculty of Agriculture (El-shatby), Alexandria University, Alexandria, Egypt
| | - Christophe Bressac
- Research Institute for Insect Biology, UMR CNRS 7261, University of Tours, Tours, France
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21
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Chevrier C, Nguyen TM, Bressac C. Heat shock sensitivity of adult male fertility in the parasitoid wasp Anisopteromalus calandrae (Hymenoptera, Pteromalidae). J Therm Biol 2019; 85:102419. [PMID: 31657760 DOI: 10.1016/j.jtherbio.2019.102419] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2019] [Revised: 08/27/2019] [Accepted: 09/16/2019] [Indexed: 11/28/2022]
Abstract
In insects, decreased reproduction is a sublethal consequence of high temperatures, with males being more sensitive to this in many species. In hymenoptera, arrhenotokous parthenogenesis means that female offspring are produced using sperm and are thus diploid, while males are haploid. Consequently, sperm stocks in males and females (after copulation) are a key regulator of the sex ratio. Anisopteromalus calandrae is a parasitoid wasp in which males can suffer from subfertility due to a drastic decrease in sperm count after exposure to high temperatures during a critical early pupal stage. However, in this species spermatogenesis continues during adulthood, therefore the heat sensitivity of adult males remains to be studied. Laboratory studies were conducted on virgin and previously mated young adult males under control (30 °C) and heat shock (10 min at 48 °C) conditions to exhaust their initial sperm stock. After heat shock, in both virgin and already mated males, the individual sperm potential was half that of controls. Both groups continuously produced sperm, but sperm stock of heat shocked males' never reached that of the controls. Heat shock reduced survival at 10 days only in previously experienced males but had no impact on the mating ability in competition for a female compared to controls. Despite a reduced sperm count, heat shocked males had fully fertile spermatozoa. Such a physiological response to heat shock in a species with continuous sperm production could be of major interest for both wild populations in a context of temperature variations and parasitoid wasps introduced for agronomical purposes.
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22
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Hidalgo K, Beaugeard E, Renault D, Dedeine F, Lécureuil C. Physiological and biochemical responses to thermal stress vary among genotypes in the parasitic wasp Nasonia vitripennis. JOURNAL OF INSECT PHYSIOLOGY 2019; 117:103909. [PMID: 31295454 DOI: 10.1016/j.jinsphys.2019.103909] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/04/2019] [Revised: 06/26/2019] [Accepted: 06/28/2019] [Indexed: 06/09/2023]
Abstract
In ectotherm species such as insects, thermal fluctuations represent a major environmental factor driving development, survival and reproduction of individuals. Reproductive traits are particularly sensitive to heat stress that can induce a permanent sterility, or at least hypofertility, of adult males. This study aims to compare physiological and biochemical responses associated to male performances to an exposure of 24 h to moderately high temperature (36 °C) among three inbred lines of N. vitripennis (AsymC, Cor, Oul). Cor males showed very specific metabolic adjustments compared to the two other lines. By contrast, Oul males showed stronger phenotypic adjustment of its life cycle, and produced metabolic water to compensate water loss by heat stress. Finally, AsymC males had probably more difficulties to acclimate at 36 °C, even for a short period, as their adult longevity was significantly reduced. Thus, the ability of developmental plasticity in N. vitripennis males exposed to heat stress appears to be dependent of their genotypes.
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Affiliation(s)
- Kevin Hidalgo
- Institut de Recherche sur la Biologie de l'Insecte UMR 7261 CNRS Université de Tours, UFR Sciences et Techniques, Parc Grandmont, Tours, France
| | - Erika Beaugeard
- Institut de Recherche sur la Biologie de l'Insecte UMR 7261 CNRS Université de Tours, UFR Sciences et Techniques, Parc Grandmont, Tours, France
| | - David Renault
- Université de Rennes 1, UMR CNRS 6553 Ecobio, Campus de Beaulieu, 263 Avenue du Gal Leclerc, CS 74205 35042 Rennes Cedex, France; Institut Universitaire de France, 1 rue Descartes, 75231 Paris Cedex 05, France
| | - Franck Dedeine
- Institut de Recherche sur la Biologie de l'Insecte UMR 7261 CNRS Université de Tours, UFR Sciences et Techniques, Parc Grandmont, Tours, France
| | - Charlotte Lécureuil
- Institut de Recherche sur la Biologie de l'Insecte UMR 7261 CNRS Université de Tours, UFR Sciences et Techniques, Parc Grandmont, Tours, France.
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23
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Houston BJ, Nixon B, Martin JH, De Iuliis GN, Trigg NA, Bromfield EG, McEwan KE, Aitken RJ. Heat exposure induces oxidative stress and DNA damage in the male germ line. Biol Reprod 2019; 98:593-606. [PMID: 29351587 DOI: 10.1093/biolre/ioy009] [Citation(s) in RCA: 76] [Impact Index Per Article: 15.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2017] [Accepted: 01/15/2018] [Indexed: 12/13/2022] Open
Abstract
The reproductive consequences of global warming are not currently understood. In order to address this issue, we have examined the reproductive consequences of exposing male mice to a mild heat stress. For this purpose, adult male mice were exposed to an elevated ambient temperature of 35°C under two exposure models. The first involved acute exposure for 24 h, followed by recovery periods between 1 day and 6 weeks. The alternative heating regimen involved a daily exposure of 8 h for periods of 1 or 2 weeks. In our acute model, we identified elevated sperm mitochondrial ROS generation (P < 0.05), increased sperm membrane fluidity (P < 0.05), DNA damage in the form of single-strand breaks (P < 0.001), and oxidative DNA damage (P < 0.05), characteristic of an oxidative stress cascade. This DNA damage was detected in pachytene spermatocytes (P < 0.001) and round spermatids (P < 0.001) isolated from testes after 1 day heat recovery. Despite these lesions, the spermatozoa of heat-treated mice exhibited no differences in their ability to achieve hallmarks of capacitation or to fertilize the oocyte and support development of embryos to the blastocyst stage (all P > 0.05). Collectively, our acute heat stress model supports the existence of heat susceptible stages of germ cell development, with the round spermatids being most perturbed and spermatogonial stem cells exhibiting resistance to this insult. Such findings were complemented by our chronic heat stress model, which further supported the vulnerability of the round spermatid population.
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Affiliation(s)
- Brendan J Houston
- Priority Research Centre for Reproductive Science, School of Environmental and Life Sciences, Discipline of Biological Sciences, University of Newcastle, Callaghan, New South Wales, Australia
| | - Brett Nixon
- Priority Research Centre for Reproductive Science, School of Environmental and Life Sciences, Discipline of Biological Sciences, University of Newcastle, Callaghan, New South Wales, Australia
| | - Jacinta H Martin
- Priority Research Centre for Reproductive Science, School of Environmental and Life Sciences, Discipline of Biological Sciences, University of Newcastle, Callaghan, New South Wales, Australia
| | - Geoffry N De Iuliis
- Priority Research Centre for Reproductive Science, School of Environmental and Life Sciences, Discipline of Biological Sciences, University of Newcastle, Callaghan, New South Wales, Australia
| | - Natalie A Trigg
- Priority Research Centre for Reproductive Science, School of Environmental and Life Sciences, Discipline of Biological Sciences, University of Newcastle, Callaghan, New South Wales, Australia
| | - Elizabeth G Bromfield
- Priority Research Centre for Reproductive Science, School of Environmental and Life Sciences, Discipline of Biological Sciences, University of Newcastle, Callaghan, New South Wales, Australia
| | - Kristen E McEwan
- Priority Research Centre for Reproductive Science, School of Environmental and Life Sciences, Discipline of Biological Sciences, University of Newcastle, Callaghan, New South Wales, Australia
| | - R John Aitken
- Priority Research Centre for Reproductive Science, School of Environmental and Life Sciences, Discipline of Biological Sciences, University of Newcastle, Callaghan, New South Wales, Australia
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Kirk Green C, Moore PJ, Sial AA. Impact of heat stress on development and fertility of Drosophila suzukii Matsumura (Diptera: Drosophilidae). JOURNAL OF INSECT PHYSIOLOGY 2019; 114:45-52. [PMID: 30796949 DOI: 10.1016/j.jinsphys.2019.02.008] [Citation(s) in RCA: 32] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/16/2018] [Revised: 02/17/2019] [Accepted: 02/19/2019] [Indexed: 06/09/2023]
Abstract
Drosophila suzukii is a globally invasive fruit pest that costs millions in yield losses and increased pest management costs. Management practices for D. suzukii currently rely heavily on calendar-based applications of broad-spectrum insecticides, but decision-based applications are theoretically possible with refined population modeling and monitoring. Temperature conditions are strongly deterministic of insect growth rates, fecundity, fertility, and resulting population densities. Therefore, information about the effects of temperature can be incorporated into population modeling to accurately predict D. suzukii population densities in the field which is crucial to maximize pesticide application efficiency and improve sustainability. Here, we investigated the effects of chronic heat stress during all of juvenile development on egg-to-adult viability and fertility. We also investigated egg-to-adult viability under heat stress after heat shock of the maternal parent. We found that heat stress during development results in lower egg-to-adult viability, and reduced lifespan and fertility for surviving adults. However, heat-shock treatment of females prior to egg laying increased the egg-to-adult viability of their eggs under heat stress. Female flies that developed at 30 °C had smaller ovaries than the untreated group and male flies had less sperm in their testes, and no sperm in their seminal vesicles. We conclude that heat stress during development is likely to have negative effect on D. suzukii population dynamics in the field. However, the intensity of such negative impact will depend on the phenotypic state of their maternal parents.
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Affiliation(s)
- C Kirk Green
- Department of Entomology, College of Agricultural and Environmental Sciences, University of Georgia, 413 Biological Sciences, Athens, GA 30602-2603, USA
| | - Patricia J Moore
- Department of Entomology, College of Agricultural and Environmental Sciences, University of Georgia, 413 Biological Sciences, Athens, GA 30602-2603, USA
| | - Ashfaq A Sial
- Department of Entomology, College of Agricultural and Environmental Sciences, University of Georgia, 413 Biological Sciences, Athens, GA 30602-2603, USA.
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Poidatz J, Bressac C, Bonnard O, Thiéry D. Delayed sexual maturity in males of Vespa velutina. INSECT SCIENCE 2018; 25:679-689. [PMID: 28248003 DOI: 10.1111/1744-7917.12452] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/07/2016] [Revised: 01/03/2017] [Accepted: 01/24/2017] [Indexed: 06/06/2023]
Abstract
Vespa velutina var nigrithorax (Lepelletier, 1835) is an invasive predator of bees accidentally introduced in France in 2004, and it is having a serious impact on apiculture and ecosystems. Studying the reproduction of an invasive species is key to assess its population dynamic. This study explores the sexual maturation of V. velutina males and the evolution of their fertility. The main studied parameters were physiologic (spermiogenesis, spermatogenesis) and anatomic (testes size and structure, head width). Two populations of males were described based on their emergence period: early males in early summer or classic males in autumn. Each testis has an average of 108 testicular follicles. Spermatogenesis is synchronous, with only 1 sperm production wave, and completed, on average, at 10.3 d after emergence with the degeneration of the testes. The sperm counts in seminal vesicles of mature males are 3 × 106 in October/November and 0.8 × 106 in June. In comparison, females store 0.1 × 106 sperm in their spermathecae. The early males emerged from colonies made by fertilized queens. The reproductive potential of these early males seemed limited, and their function in the colony is discussed. The sperm stock evolution in autumn males suggests the occurrence of a reproductive pattern of male competition for the access to females and a single copulation per male. The synchronicity of male and foundress emergences and sexual maturation is of primary importance for the mating success and the future colony development.
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Affiliation(s)
- Juliette Poidatz
- INRA, UMR1065 Santé et Agroécologie du Vignoble, ISVV, Bordeaux Sciences Agro, Villenave d'Ornon, France
| | | | - Olivier Bonnard
- INRA, UMR1065 Santé et Agroécologie du Vignoble, ISVV, Bordeaux Sciences Agro, Villenave d'Ornon, France
| | - Denis Thiéry
- INRA, UMR1065 Santé et Agroécologie du Vignoble, ISVV, Bordeaux Sciences Agro, Villenave d'Ornon, France
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Husain M, Alwaneen WS, Mehmood K, Rasool KG, Tufail M, Aldawood AS. Biological Traits of Cadra cautella (Lepidoptera: Pyralidae) Reared on Khodari Date Fruits Under Different Temperature Regimes. JOURNAL OF ECONOMIC ENTOMOLOGY 2017; 110:1923-1928. [PMID: 28605547 DOI: 10.1093/jee/tox162] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/02/2017] [Indexed: 06/07/2023]
Abstract
The almond moth, Cadra cautella (Walker) (Lepidoptera: Pyralidae), is a serious worldwide pest of dates and other crops, both in the field and in storage. Infestation by this pest significantly limits the sale and export of dates. Modified atmospheres, the temperature manipulations, are the best eco-friendly alternatives in stored product protection. We examined temperature regulation as an ecologically friendly method of pest management in stored food commodities, in particular, its effects on characteristics of C. cautella biology, including development time, oviposition period, fecundity, fertility, and longevity of adults reared on date cultivar 'Khodari,' at temperatures of 15, 25, and 35 ± 1 °C, with 65 ± 5% relative humidity and a photoperiod of 15:9 (L:D) h. Six larval instars were recorded at each temperature. Larval development was sluggish at 15 °C; therefore, daily observations were terminated after 180 d of the larval span for this temperature. Total larval spans of 48.95 ± 0.76 and 32.12 ± 1.08 d were recorded at 25 °C and 35 °C, respectively. A mean ovipositional period of 5.80 ± 0.44 d yielding 213.60 ± 13.41 eggs per female, with hatchability of 85.94 ± 2.97%, was recorded at 25 °C, whereas at 35 °C, a mean ovipositional period of 1.60 ± 0.26 d yielded 19.80 ± 5.11 eggs per female, with no hatchability. These differences were highly significant. Our observations of poor development at 15 °C, lower numbers of eggs and absence of hatchability at 35 °C, together with head capsule measurements and growth ratios, can be of benefit when planning management strategies to reduce C. cautella infestation.
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Affiliation(s)
- Mureed Husain
- Economic Entomology Research Unit, Plant Protection Department, College of Food and Agriculture Sciences, King Saud University, Riyadh 11451, Saudi Arabia
| | - Waleed S Alwaneen
- National Center for Agricultural Technology (NCAT), King Abdul-Aziz City for Science and Technology (KACST), P.O. Box 6086, Riyadh, Kingdom of Saudi Arabia
| | - Khalid Mehmood
- Economic Entomology Research Unit, Plant Protection Department, College of Food and Agriculture Sciences, King Saud University, Riyadh 11451, Saudi Arabia
| | - Khawaja Ghulam Rasool
- Economic Entomology Research Unit, Plant Protection Department, College of Food and Agriculture Sciences, King Saud University, Riyadh 11451, Saudi Arabia
- Organization of Advanced Science and Technology, Kobe University, Kobe 657-8501, Japan
| | - Muhammad Tufail
- Economic Entomology Research Unit, Plant Protection Department, College of Food and Agriculture Sciences, King Saud University, Riyadh 11451, Saudi Arabia
- Organization of Advanced Science and Technology, Kobe University, Kobe 657-8501, Japan
| | - Abdulrahman Saad Aldawood
- Economic Entomology Research Unit, Plant Protection Department, College of Food and Agriculture Sciences, King Saud University, Riyadh 11451, Saudi Arabia
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Porcelli D, Gaston KJ, Butlin RK, Snook RR. Local adaptation of reproductive performance during thermal stress. J Evol Biol 2016; 30:422-429. [DOI: 10.1111/jeb.13018] [Citation(s) in RCA: 52] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2016] [Revised: 10/27/2016] [Accepted: 10/31/2016] [Indexed: 12/15/2022]
Affiliation(s)
- D. Porcelli
- Department of Animal and Plant Sciences; University of Sheffield; Sheffield UK
| | - K. J. Gaston
- Environment and Sustainability Institute; University of Exeter; Penryn UK
| | - R. K. Butlin
- Department of Animal and Plant Sciences; University of Sheffield; Sheffield UK
| | - R. R. Snook
- Department of Animal and Plant Sciences; University of Sheffield; Sheffield UK
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Chirault M, Van de Zande L, Hidalgo K, Chevrier C, Bressac C, Lécureuil C. The spatio-temporal partitioning of sperm by males of the prospermatogenic parasitoid Nasonia vitripennis is in line with its gregarious lifestyle. JOURNAL OF INSECT PHYSIOLOGY 2016; 91-92:10-17. [PMID: 27269614 DOI: 10.1016/j.jinsphys.2016.06.002] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/01/2015] [Revised: 06/01/2016] [Accepted: 06/03/2016] [Indexed: 06/06/2023]
Abstract
Male fitness depends on the number of lifetime progeny of their mates and could be constrained by the chance of finding a mate, lifespan and temporal patterns of sperm production and allocation. Here, we used the parasitic wasp Nasonia vitripennis with a two-week lifespan and a gregarious lifestyle, to analyze how the reproductive system is organized to allocate spermatozoa over consecutive matings. Results show that spermatogenesis is synchronized and completed one day before emergence so that males emerge with a full sperm complement. We also found a regulation of spermatozoa transfer between testis and seminal vesicles that allows males to partition small ejaculates over multiple matings. Overall, this study shows that for N. vitripennis, male fertilization potential is determined (1) at the pupal stage, when spermatogenesis takes place to generate a complete life-long stock, (2) on emergence, when transport of spermatozoa from testes to seminal vesicles is initiated and (3) in adulthood, during which spermatozoa are partitioned over successive copulations. Such life history-traits are consistent with the gregarious lifestyle of N. vitripennis.
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Affiliation(s)
- Marlène Chirault
- Institut de Recherche sur la Biologie de l'Insecte UMR 7261 CNRS - Université François-Rabelais, UFR Sciences et Techniques, Parc Grandmont, Tours, France
| | - Louis Van de Zande
- GELIFES (Groningen Institute for Evolutionary Life Sciences), University of Groningen, The Netherlands
| | - Kevin Hidalgo
- Institut de Recherche sur la Biologie de l'Insecte UMR 7261 CNRS - Université François-Rabelais, UFR Sciences et Techniques, Parc Grandmont, Tours, France
| | - Claude Chevrier
- Institut de Recherche sur la Biologie de l'Insecte UMR 7261 CNRS - Université François-Rabelais, UFR Sciences et Techniques, Parc Grandmont, Tours, France
| | - Christophe Bressac
- Institut de Recherche sur la Biologie de l'Insecte UMR 7261 CNRS - Université François-Rabelais, UFR Sciences et Techniques, Parc Grandmont, Tours, France
| | - Charlotte Lécureuil
- Institut de Recherche sur la Biologie de l'Insecte UMR 7261 CNRS - Université François-Rabelais, UFR Sciences et Techniques, Parc Grandmont, Tours, France.
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van Baaren J, Dufour CMS, Pierre JS, Martel V, Louâpre P. Evolution of life-history traits and mating strategy in males: a case study on two populations of aDrosophilaparasitoid. Biol J Linn Soc Lond 2015. [DOI: 10.1111/bij.12644] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Joan van Baaren
- University of Rennes 1; UMR CNRS 6553 EcoBio; Avenue du Général Leclerc Campus de Beaulieu 35042 Rennes Cedex France
| | - Claire M.-S. Dufour
- University of Rennes 1; UMR CNRS 6553 EcoBio; Avenue du Général Leclerc Campus de Beaulieu 35042 Rennes Cedex France
| | - Jean-Sébastien Pierre
- University of Rennes 1; UMR CNRS 6553 EcoBio; Avenue du Général Leclerc Campus de Beaulieu 35042 Rennes Cedex France
| | - Véronique Martel
- University of Rennes 1; UMR CNRS 6553 EcoBio; Avenue du Général Leclerc Campus de Beaulieu 35042 Rennes Cedex France
| | - Philippe Louâpre
- University of Rennes 1; UMR CNRS 6553 EcoBio; Avenue du Général Leclerc Campus de Beaulieu 35042 Rennes Cedex France
- Université de Bourgogne Franche-Comté; UMR CNRS 6282 Biogeosciences; 6 Bd Gabriel 21000 Dijon France
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