Journal of insect physiology最新文献_第2页

Three antenna-specific odorant binding proteins in Protaetia brevitarsis (Coleoptera: Scarabaeoidea) involve in recognition of floral volatiles 白衣原甲（鞘翅目：金盏花总科）中三种触角特异性气味结合蛋白参与了花挥发物的识别。

IF 2.3 2区农林科学

Journal of insect physiology Pub Date : 2025-05-24 DOI: 10.1016/j.jinsphys.2025.104823

Panjing Liu , Xiaofang Zhang , Yubo Wang , Beibei Xiao , Qianfu Su , Tao Zhang , Hongyi Wei

{"title":"Three antenna-specific odorant binding proteins in Protaetia brevitarsis (Coleoptera: Scarabaeoidea) involve in recognition of floral volatiles","authors":"Panjing Liu , Xiaofang Zhang , Yubo Wang , Beibei Xiao , Qianfu Su , Tao Zhang , Hongyi Wei","doi":"10.1016/j.jinsphys.2025.104823","DOIUrl":"10.1016/j.jinsphys.2025.104823","url":null,"abstract":"<div><div>Odorant binding proteins (OBPs) play a vital role in the insect olfactory recognition system, as they bind and transport specific semiochemicals to chemosensory receptors for further processing. The agricultural and horticultural pest, white-spotted flower chafer (WSFC), <em>Protaetia brevitarsis</em> (Coleoptera, Scarabaeoidea), has significantly harmed numerous crops and fruits in China. It is hypothesized that WSFCs rely on specific OBPs and chemosensory receptors to identify palatable food sources and optimal oviposition sites. Twenty-three putative OBPs (PbreOBPs) were identified from the WSFC genome in our research. Based on phylogenetic analysis, PbreOBPs exhibited high degree of similarity to those of <em>Holotrichia parallela</em> and <em>Anomala corpulenta</em>. Tissue expression profiles showed that ten PbreOBPs exhibited antenna-biased expression. We recombined and purified three antenna-specific PbreOBPs: PbreOBP8, PbreOBP9, and PbreOBP18. Fluorescence competitive binding assays revealed that they had higher binding affinities to <em>β</em>-ionone, phenethyl salicylate, phenylacetaldehyde, and benzyl benzoate — compounds commonly found in floral volatiles. Additionally, PbreOBP8 showed the ability to bind microbial volatiles, such as 3-octanol, 3-methyl-1-butanol, and 1-octen-3-ol, suggesting a role in locating food or oviposition sites. Forthermore, we also predicted the key acid residues which involved in the binding of three PbreOBPs towards floral and microbial volatiles. The present investigation demonstrated that the antenna-specific PbreOBP8, PbreOBP9 and PbreOBP18 were likely involved in mediating the recognition of floral volatiles. The findings introduce possible avenues for further research into PbreOBPs and provide potential targets for creating olfactory-based control methods for WSFC populations.</div></div>","PeriodicalId":16189,"journal":{"name":"Journal of insect physiology","volume":"164 ","pages":"Article 104823"},"PeriodicalIF":2.3,"publicationDate":"2025-05-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144150644","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

First study on the effect of UV radiation on spiders: biochemical analysis 紫外线辐射对蜘蛛影响的首次研究：生化分析。

IF 2.3 2区农林科学

Journal of insect physiology Pub Date : 2025-05-23 DOI: 10.1016/j.jinsphys.2025.104821

A. Laino , C. Gabellone , M. Gómez Lobato , F. Arrighetti , J. Tau , S. Rodríguez Gil , C.F. Garcia

{"title":"First study on the effect of UV radiation on spiders: biochemical analysis","authors":"A. Laino , C. Gabellone , M. Gómez Lobato , F. Arrighetti , J. Tau , S. Rodríguez Gil , C.F. Garcia","doi":"10.1016/j.jinsphys.2025.104821","DOIUrl":"10.1016/j.jinsphys.2025.104821","url":null,"abstract":"<div><div>Ultraviolet radiation is one of the environmental factors that impacts all living beings and can cause various types of damage. In this study, the effects of UV-B and UV-C radiation on the antioxidant response, reactive oxygen species levels, and potential histological and chromosomal damage were evaluated for the first time in the spider <em>Misumenops maculissparsus</em> at three developmental stages (juveniles J3, J4, and adults). Juveniles exhibited significant inhibition of the antioxidant enzymes superoxide dismutase, catalase, and glutathione-S-transferase under UV radiation exposure. In adults, no enzymatic activity changes were observed, but there were increases in ROS levels, particularly under UV-C exposure, and alterations in the cellular population analyzed by flow cytometry. Histological analysis revealed substantial pigment accumulation beneath the cuticle in juveniles and, to a lesser extent, in adults, which could serve as a natural barrier and antioxidant defense against UV radiation. Cytogenetic analysis determined for the first time in this species a diploid chromosome number of 2n = 23 and identified chromatin granules in UV radiation-exposed adults, suggesting UV radiation-induced chromatin damage. These multidisciplinary findings enhance our understanding of the physiological defenses that spiders employ when exposed to UV radiation at different developmental stages.</div></div>","PeriodicalId":16189,"journal":{"name":"Journal of insect physiology","volume":"163 ","pages":"Article 104821"},"PeriodicalIF":2.3,"publicationDate":"2025-05-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144142715","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Assessing nanoparticle-enabled dsRNA delivery for oral RNAi in two orthopteran pests: Schistocerca gregaria and Melanoplus sanguinipes 评估纳米颗粒使dsRNA在两种直足动物害虫中的口服RNAi递送：grestocerca gregaria和Melanoplus sanguinipes。

IF 2.3 2区农林科学

Journal of insect physiology Pub Date : 2025-05-22 DOI: 10.1016/j.jinsphys.2025.104825

Seema Rana , Changsun Kang , Seonghyun Ryu , Derek A. Woller , Dongin Kim , Hojun Song

{"title":"Assessing nanoparticle-enabled dsRNA delivery for oral RNAi in two orthopteran pests: Schistocerca gregaria and Melanoplus sanguinipes","authors":"Seema Rana , Changsun Kang , Seonghyun Ryu , Derek A. Woller , Dongin Kim , Hojun Song","doi":"10.1016/j.jinsphys.2025.104825","DOIUrl":"10.1016/j.jinsphys.2025.104825","url":null,"abstract":"<div><div>Locusts and pest grasshoppers (Orthoptera: Acrididae) cause significant economic losses to agricultural crops and rangeland forage and can even cause humanitarian crises during periodic plagues. Current management methods for these insects rely heavily on broad-spectrum chemical insecticides and growth regulators, which can affect non-target organisms and may eventually develop resistance in the targeted species. Therefore, we assessed the potential of RNA interference (RNAi)-based alternative strategies that could supplement the current management methods. In insects, RNAi efficiency is known to vary with the method of double-stranded RNA (dsRNA) delivery. In this study, we tested two different delivery methods (injection and oral feeding) in the desert locust (<em>Schistocerca gregaria</em>) and the migratory grasshopper (<em>Melanoplus sanguinipes</em>) and showed that both species are sensitive to the injection but not to the oral feeding of dsRNA, likely due to high nuclease activity or poor uptake in the midgut. To address these limitations, we explored the utility of using nanoparticles that are often used for drug delivery in humans as a carrier (poly lactic-co-glycolic acid [PLGA] and poly(L-arginine)-polyethylene glycol [PLA-PEG]) for orally delivering dsRNA to the insect pests. Although the PLGA nanoparticles successfully permeated the digestive system into the hemolymph and the PLA-PEG-dsRNA complexes remained stable in the midgut juice and were detected in the fat body, neither dsRNA-encapsulating nanoparticle elicited gene knockdown upon oral feeding. These results suggest that nanoparticle-based oral delivery improves dsRNA stability and midgut permeation. However, additional barriers must be overcome to achieve efficient oral RNAi in these orthopteran pest species.</div></div>","PeriodicalId":16189,"journal":{"name":"Journal of insect physiology","volume":"163 ","pages":"Article 104825"},"PeriodicalIF":2.3,"publicationDate":"2025-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144142712","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Termite queen physogastry and associated mechanisms shaping a high lifetime fecundity 白蚁蚁后的生理和相关机制塑造了高的终身繁殖力。

IF 2.3 2区农林科学

Journal of insect physiology Pub Date : 2025-05-21 DOI: 10.1016/j.jinsphys.2025.104824

Ana Maria Costa-Leonardo , Vanelize Janei , Ana Cristina Ignatti , Iago Bueno da Silva

{"title":"Termite queen physogastry and associated mechanisms shaping a high lifetime fecundity","authors":"Ana Maria Costa-Leonardo , Vanelize Janei , Ana Cristina Ignatti , Iago Bueno da Silva","doi":"10.1016/j.jinsphys.2025.104824","DOIUrl":"10.1016/j.jinsphys.2025.104824","url":null,"abstract":"<div><div>Termites are eusocial insects whose colonies are usually headed by a pair of reproductives (queen and king). During its lifespan, the royal couple faces an age-dependent increase in fecundity. In queens, it reflects on the disproportional development of the ovaries and enlargement of the abdominal cuticle, a phenomenon referred to as physogastry. Beyond the impact on the ovaries and egg production, physogastry requires the morphological and physiological reprogramming of other systems such as the digestive, tracheal, muscular, and circulatory, resulting in a process that takes years to happen. Given the sampling difficulty and the absence of physogastric queens in some model species, such a topic is overlooked, and a comprehensive review has not been provided to date. Here we aim to review the process of physogastry in termite queens, from the pioneer studies on the morphological changes accompanying this process to recent advances in the molecular mechanisms underlying fecundity and the remarkable longevity reached by mature queens (e.g., TI-J-LiFe framework). Intrinsic and extrinsic factors driving this phenomenon, its impact on colony growth, and the current knowledge gaps are also discussed. We expect that our approach paves the way for further studies of termite physogastry, especially given the advances of molecular tools and recent termite phylogenies, and comparative analyses with other eusocial insects and the mechanisms driving this phenomenon in the different groups. Physogastry is a rare process in adult insects and remarkable in termite queens, offering aunique opportunity to unravel the basis of a highly fecund life.</div></div>","PeriodicalId":16189,"journal":{"name":"Journal of insect physiology","volume":"163 ","pages":"Article 104824"},"PeriodicalIF":2.3,"publicationDate":"2025-05-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144132425","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Do bumble bees make optimal nutritional choices? 大黄蜂能做出最佳的营养选择吗？

IF 2.3 2区农林科学

Journal of insect physiology Pub Date : 2025-05-20 DOI: 10.1016/j.jinsphys.2025.104822

Etya Amsalem, Anna Cressman, Seyed Ali Modarres Hasani

{"title":"Do bumble bees make optimal nutritional choices?","authors":"Etya Amsalem, Anna Cressman, Seyed Ali Modarres Hasani","doi":"10.1016/j.jinsphys.2025.104822","DOIUrl":"10.1016/j.jinsphys.2025.104822","url":null,"abstract":"<div><div>Nutrition is crucial for bees, impacting their health, survival, and pollination performance in ecosystems and agriculture. Bees get essential nutrients such as carbohydrates, proteins, lipids, vitamins, and minerals, primarily from nectar and pollen. Many bee species are experiencing declines linked partially to nutritional stress, often exacerbated by climate change, pesticides, and pathogens, highlighting the need to understand and support optimal bee nutrition to mitigate these stressors. Bumble bees, such as <em>Bombus impatient</em> and <em>Bombus terrestris</em>, essential pollinators in agriculture, are known to regulate their nutrient intake. However, whether their dietary choices improve fitness is poorly understood. We tested diets with varying protein, lipid, and carbohydrate compositions, analyzing impacts on consumption, body mass, egg laying, and ovarian activation. Results showed that bees overconsumed pollen on protein-enriched diets and under consumed it on lipid-enriched and glucose-based diets. Nectar overconsumption was observed on low-concentration sucrose diets. These patterns, however, did not correspond to improved fitness, as egg laying and body mass were negatively correlated with consumption in diets enriched with protein and sugar. Ovarian activation was largely unaffected across most diets, indicating it may not be a reliable indicator of diet quality. These findings raise doubts about whether bees make optimal nutritional choices and suggest that diet consumption alone may not be a reliable indicator of their optimal diet. Alternatively, bees made the best possible decisions under circumstances that presented a lose-lose tradeoff across all the diets provided. These data can inform future studies on nutritional stress, enhance interpretations of bee diet preferences in bioassays, and guide bumble bee management practices.</div></div>","PeriodicalId":16189,"journal":{"name":"Journal of insect physiology","volume":"163 ","pages":"Article 104822"},"PeriodicalIF":2.3,"publicationDate":"2025-05-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144107790","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Leaving the web: Testing the link between predation style and resting metabolic rate using closely related spiders with contrasting lifestyles 离开蛛网：用生活方式截然不同的近亲蜘蛛来测试捕食方式和静息代谢率之间的联系。

IF 2.3 2区农林科学

Journal of insect physiology Pub Date : 2025-05-16 DOI: 10.1016/j.jinsphys.2025.104819

Kathryn Nagel , Caroline Williams , Rosemary Gillespie

{"title":"Leaving the web: Testing the link between predation style and resting metabolic rate using closely related spiders with contrasting lifestyles","authors":"Kathryn Nagel , Caroline Williams , Rosemary Gillespie","doi":"10.1016/j.jinsphys.2025.104819","DOIUrl":"10.1016/j.jinsphys.2025.104819","url":null,"abstract":"<div><div>Resting metabolic rate is influenced by numerous biotic and abiotic factors, as well as complex interactions between these factors. Behavior and lifestyle traits have significant influence on metabolic rates, but they closely interact with other influential factors, such as environmental conditions and evolutionary history. This makes distinguishing the influence of behavior and lifestyle on metabolism independent of any other factors difficult. Spiders are an ideal system for studying predation behavior, as they broadly exhibit two methods of prey capture: web-building and cursorial hunting. A spider’s web represents a large energy sink, and the loss of web-building is expected to have a significant effect on energy budget and allocation. In order to determine the influence of predation style on resting metabolic rate, we use two co-occurring, closely related clades of Hawaiian long-jawed orb weaver spiders (<em>Tetragnatha</em>, Tetragnathidae), one that builds webs, and one that adopts a cursorial lifestyle. Using stop-flow respirometry, we measured the resting metabolic rates of four species, two web-building and two cursorial, at 20 °C. As predicted, the cursorial <em>Tetragnatha</em> species have higher resting metabolic rates than the web-building species. By using this unique natural system and eliminating confounding factors, our results show that predation style has a direct influence on spider metabolism.</div></div>","PeriodicalId":16189,"journal":{"name":"Journal of insect physiology","volume":"163 ","pages":"Article 104819"},"PeriodicalIF":2.3,"publicationDate":"2025-05-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144094058","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Sugar response and gustatory gene expression in the stingless bee Tetragonisca fiebrigi 无刺蜜蜂糖反应及味觉基因表达

IF 2.3 2区农林科学

Journal of insect physiology Pub Date : 2025-05-11 DOI: 10.1016/j.jinsphys.2025.104818

María Sol Balbuena , Jose M. Latorre-Estivalis , Walter M. Farina

{"title":"Sugar response and gustatory gene expression in the stingless bee Tetragonisca fiebrigi","authors":"María Sol Balbuena , Jose M. Latorre-Estivalis , Walter M. Farina","doi":"10.1016/j.jinsphys.2025.104818","DOIUrl":"10.1016/j.jinsphys.2025.104818","url":null,"abstract":"<div><div>Sugar detection and gustatory responsiveness are critical for foraging success in bees, influencing their ability to locate and exploit nectar and pollen sources. Here, we investigated the sugar response thresholds and the expression of two candidate gustatory receptor genes (<em>TfieGr1</em> and <em>TfieGr3</em>) in the antennae and proboscises of foragers of the stingless bee <em>Tetragonisca fiebrigi</em>. Proboscis extension assays revealed that returning pollen foragers (PF) exhibited lower sugar response thresholds and higher sensitivity to sucrose, glucose, and fructose than returning nonpollen foragers (NPF), suggesting that NPF could be mainly engaged in finding high-quality nectar sources. In addition, more than 60 % of PF responded to all sugars tested, while NPF showed a strong preference for sucrose and glucose, with only 4 % responding to fructose. Molecular experiments revealed no significant differences in <em>TfieGr1</em> and <em>TfieGr3</em> expression levels between PF and NPF in either sensory tissue. These findings suggest that other gustatory receptors or mechanisms, such as central processing or internal nutrient sensing, may underlie the observed behavioral differences. Our results highlight potential species-specific adaptations in sugar detection mechanisms and underscore the importance of integrating behavioral, molecular, and ecological approaches to understanding foraging strategies in stingless bees.</div></div>","PeriodicalId":16189,"journal":{"name":"Journal of insect physiology","volume":"163 ","pages":"Article 104818"},"PeriodicalIF":2.3,"publicationDate":"2025-05-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143946528","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Ultraviolet reflection in mayfly wings 蜉蝣翅膀上的紫外线反射。

IF 2.3 2区农林科学

Journal of insect physiology Pub Date : 2025-05-11 DOI: 10.1016/j.jinsphys.2025.104817

Manuela Rebora , Silvana Piersanti , Lorenzo Giulivi , Alexander Kovalev , Stanislav Gorb , Gianandrea Salerno

{"title":"Ultraviolet reflection in mayfly wings","authors":"Manuela Rebora , Silvana Piersanti , Lorenzo Giulivi , Alexander Kovalev , Stanislav Gorb , Gianandrea Salerno","doi":"10.1016/j.jinsphys.2025.104817","DOIUrl":"10.1016/j.jinsphys.2025.104817","url":null,"abstract":"<div><div>In the present study it is shown for the first time that the transparent membranous wings of mayflies (<em>Ecdyonurus</em> gr. <em>venosus</em>) can reflect UV light at both the <em>imago</em> and <em>subimago</em> stage. In the <em>imago,</em> reflectance spectra from male and female wings are significantly different with female wing reflection in the UV wavelengths higher than that of males. In the <em>subimago</em> the wing reflectance spectra of both sexes are similar and the intensity of reflection is lower compared to the <em>imago</em>. Higher UV reflection in female wings corresponds to wavelengths of the maximum sensitivity of male compound eye (recorded in other mayfly species), thus making wings a potentially important visual cue for recognition and mating. The UV reflection in the wing of <em>E.</em> gr. <em>venosus</em> is angle dependent, thus revealing its structural nature. Wax crystals in the form of rods in the wings of the <em>imago</em> have an important role in shaping the pattern of the reflectance spectra owing to their omnidirectional antireflection properties. This study can contribute to understand the role of UV light sensitivity as part of the integrated visual system of many animals, a research field so far disregarded owing to our anthropocentric dimension and to unravel the functional role of nanostructures of insect surfaces with special optical properties which can inspire new biomimetic surfaces.</div></div>","PeriodicalId":16189,"journal":{"name":"Journal of insect physiology","volume":"163 ","pages":"Article 104817"},"PeriodicalIF":2.3,"publicationDate":"2025-05-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144024459","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Development time integrates temperature and host plant cues for eyespot size in three tropical satyrine butterflies 发育时间综合了温度和寄主植物对三种热带斑蝶眼斑大小的影响

IF 2.3 2区农林科学

Journal of insect physiology Pub Date : 2025-05-07 DOI: 10.1016/j.jinsphys.2025.104814

Indukala Prasannakumar , Freerk Molleman , Dheeraj Chandavarkar , Ullasa Kodandaramaiah

{"title":"Development time integrates temperature and host plant cues for eyespot size in three tropical satyrine butterflies","authors":"Indukala Prasannakumar , Freerk Molleman , Dheeraj Chandavarkar , Ullasa Kodandaramaiah","doi":"10.1016/j.jinsphys.2025.104814","DOIUrl":"10.1016/j.jinsphys.2025.104814","url":null,"abstract":"<div><div>Many tropical butterflies have distinct wet and dry season adult morphs differing in the size of wing eyespots. Eyespot size is influenced by the environment experienced by developing larvae, and this plasticity is adaptive because the morphs have higher survival in their respective seasons. Higher temperature during the larval phase produces adults with larger eyespots in many species. This reaction norm is adaptive when high temperatures precede the wet season, which is not the case in all regions. Therefore, butterflies may rely on another environmental cue such as host plant species, and may also integrate information from multiple environmental variables through their combined effect on larval developmental time. To test this, we manipulated developmental time of sympatric populations of three butterflies − <em>Ypthima huebneri, Mycalesis mineus</em> and <em>Melanitis leda −</em> using combinations of temperatures and host plant species. Higher rearing temperature correlated with larger eyespot size in all species. Host plant species independently affected eyespot size. The effects of temperature and host plant differed between species, sexes, and between the forewing and hindwing, suggesting differential selection pressures on eyespots. Nevertheless, information about temperature and host plant species may be integrated through developmental time, because shorter larval development time was correlated with larger eyespots in adults. However, there were exceptions within specific treatments, species, and eyespots. Our results highlight the complex control of eyespot size, which is likely influenced by a network of interacting factors. Our study also demonstrates how sympatric populations of different species interpret similar environmental cues differently.</div></div>","PeriodicalId":16189,"journal":{"name":"Journal of insect physiology","volume":"163 ","pages":"Article 104814"},"PeriodicalIF":2.3,"publicationDate":"2025-05-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143924371","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Nutritional optima for life-history traits vary with temperature and across locally-adapted populations 生活史性状的营养最佳值随温度和适应当地的种群而变化

IF 2.3 2区农林科学

Journal of insect physiology Pub Date : 2025-05-05 DOI: 10.1016/j.jinsphys.2025.104815

Brooke Zanco , Juliano Morimoto , Fiona Cockerell , Christen Mirth , Carla M. Sgrò

{"title":"Nutritional optima for life-history traits vary with temperature and across locally-adapted populations","authors":"Brooke Zanco , Juliano Morimoto , Fiona Cockerell , Christen Mirth , Carla M. Sgrò","doi":"10.1016/j.jinsphys.2025.104815","DOIUrl":"10.1016/j.jinsphys.2025.104815","url":null,"abstract":"<div><div>As the climate changes, populations must overcome more frequent and more extreme exposure to a wide range of stressors. However, our knowledge of how locally-adapted populations respond to combinations of stressors remains incomplete. Recent studies show that elevated temperatures can interact with nutrition to accentuate the negative effects of a poor diet, suggesting higher costs of nutritional stress when individuals experience temperatures outside of their locally-adapted conditions. This can translate into reduced nutrient optima under thermal stress in life-history trait landscapes, a hypothesis that remains to be tested. Here, we used the Geometric Framework for Nutrition to test this hypothesis using two locally-adapted populations of <em>Drosophila melanogaster</em> from opposing ends of a well-characterised adaptive gradient along the east coast of Australia (tropical vs. temperate). We found that the negative effects of nutritional stress were significantly greater in the tropical population under warmer temperatures. In contrast, the temperate population was able to utilise a broader nutritional space to maintain high viability and a large wing size across the range of fluctuating temperatures. Our findings reveal the ways in which local adaptation impacts how populations navigate and explore the nutritional space in response to increasingly stressful thermal conditions. These data suggest that certain populations may be better able to cope with increasingly stressful and variable environments, while others may be more vulnerable to local extinctions.</div></div>","PeriodicalId":16189,"journal":{"name":"Journal of insect physiology","volume":"163 ","pages":"Article 104815"},"PeriodicalIF":2.3,"publicationDate":"2025-05-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143918050","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0