Siphephelo M. Phungula, K. Krüger, R. S. Nofemela, C. Weldon
{"title":"Developmental diet, life stage and thermal acclimation affect thermal tolerance of the fall armyworm, Spodoptera frugiperda","authors":"Siphephelo M. Phungula, K. Krüger, R. S. Nofemela, C. Weldon","doi":"10.1111/phen.12414","DOIUrl":"https://doi.org/10.1111/phen.12414","url":null,"abstract":"","PeriodicalId":20081,"journal":{"name":"Physiological Entomology","volume":"26 1","pages":""},"PeriodicalIF":1.5,"publicationDate":"2023-07-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88055758","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Siphephelo M. Phungula, Kerstin Krüger, Robert S. Nofemela, Christopher W. Weldon
{"title":"Developmental diet, life stage and thermal acclimation affect thermal tolerance of the fall armyworm, Spodoptera frugiperda","authors":"Siphephelo M. Phungula, Kerstin Krüger, Robert S. Nofemela, Christopher W. Weldon","doi":"10.1111/phen.12414","DOIUrl":"https://doi.org/10.1111/phen.12414","url":null,"abstract":"Insect thermal tolerance affects survival and distribution of species but can vary within and between individuals due to the environmental conditions they experience. The fall armyworm (FAW), Spodoptera frugiperda (J. E. Smith) (Lepidoptera: Noctuidae), recently invaded Africa and its local hotspots are associated with weather and crop phenology. We investigated the effects of larval diet (maize plants, wheat plants or chickpea‐based artificial diet), life stages and acclimation temperature on thermal tolerance traits of FAW to explore how these variables might contribute to its presence in the field. First and sixth instar larvae and adults reared on each diet at 25°C were acclimated for 24 h at 20, 25 or 30°C. We then recorded the critical thermal minimum (CTmin) and critical thermal maximum (CTmax) of individuals. Sixth instars had the highest CTmin but the effects of acclimation and diet on this trait depended on the life stage being tested. CTmin of first instars increased with acclimation temperature when fed on an artificial diet, but sixth instars and adults were not affected by acclimation or larval diet. CTmax was lowest among adults but acclimation and diet again had effects that differed between life stages. CTmax of first instars and adults increased with acclimation temperature but not in sixth instars. Sixth instars and adults reared on the artificial diet had the highest CTmax but diet had no effect on first instar CTmax. Our results show the complexity of thermal tolerance across FAW life stages and suggest the need to consider local temperature variation and available dietary resources when predicting their potential distribution.","PeriodicalId":20081,"journal":{"name":"Physiological Entomology","volume":"48 4","pages":"122-131"},"PeriodicalIF":1.5,"publicationDate":"2023-07-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"71986215","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Zhongjuan Di, Jiahui Tian, Muhammad Yasir Ali, Biyun Zhang, Shiyong Yang, Yuejun Fu, Fengqi Li, Chen Luo
{"title":"Diversity, domain duplication, birth-and-death and adaptive evolution of fatty acyl-CoA reductase genes in Hemiptera","authors":"Zhongjuan Di, Jiahui Tian, Muhammad Yasir Ali, Biyun Zhang, Shiyong Yang, Yuejun Fu, Fengqi Li, Chen Luo","doi":"10.1111/phen.12413","DOIUrl":"https://doi.org/10.1111/phen.12413","url":null,"abstract":"<p>Fatty acyl-CoA reductases (FARs) play an important role in the synthesis of fatty alcohols in various organisms. Based on the important function of FAR genes, they can be used as a potential molecular target for controlling agricultural pests. Although the FAR genes have been studied in a number of insects, the gain, loss, and molecular evolution of FAR genes between different Hemipteran species still require comprehensive and systematic study. This study systematically identified and analysed 352 FAR genes from 12 Hemipteran species, including six typical true bug species, <i>Cimex lectularius</i>, <i>Apolygus lucorum</i>, <i>Halyomorpha halys</i>, <i>Oncopeltus fasciatus</i>, <i>Rhodnius prolixus</i> and <i>Gerris buenoi</i>. The number of FAR genes per species ranged from 17 to 43, and a phylogenetic analysis showed that the identified FAR genes of Hemiptera can be classified into 11 clades. The gain and loss of FAR genes have occurred in some Hemipteran species. These FAR genes conform to the birth-and-death model in the evolutionary process. Through selection pressure analysis, we determined that <i>G. buenoi</i> in clade 11 evolved under the pressure of positive selection, with the evolutionary sites of A at position 214 and T at position 451, thus clarifying the differences in amino acids among species and providing a better understanding of the molecular evolutionary mechanism of Hemipteran FAR. In addition, structural analysis of the FAR genes revealed duplication of the two conservative domains, the Rossmann-fold domain and the sterile domain, of the FAR in four species, namely <i>Bemisia tabaci</i>, <i>Diaphorina citri</i>, <i>R. prolixus</i> and <i>Trialeurodes vaporariorum</i>. This study lays a foundation for further studies on the molecular functions of Hemiptera FAR, and provides a possible new target for the control of Hemiptera, especially the stink bugs.</p>","PeriodicalId":20081,"journal":{"name":"Physiological Entomology","volume":"48 2-3","pages":"97-106"},"PeriodicalIF":1.5,"publicationDate":"2023-06-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"50146711","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Eco-evolutionary implications for a possible contribution of cuticle hardening system in insect evolution and terrestrialisation","authors":"Tsunaki Asano, Kosei Hashimoto, R. Craig Everroad","doi":"10.1111/phen.12406","DOIUrl":"https://doi.org/10.1111/phen.12406","url":null,"abstract":"<p>Previously we proposed one aspect of how insects could adapt to terrestrial environments during their evolution. The hypothesis is based on a theory that insects have evolved an insect-specific system for cuticle formation mediated by an insect-specific enzyme. This enzyme, multicopper oxidase-2 (MCO2), catalyses the oxidation of catecholamines using molecular oxygen as the acceptor of electrons from the substrates. A potential advantage of this MCO2-mediated system is the utilization of molecular oxygen abundant in the atmosphere, which is different from the case in crustaceans (close relatives of insects) that utilize calcium ions. Accumulation of calcium ions leads to an increase in weight, but the lightweight cuticle without calcification might have been a critical factor enabling insects to evolve flight first in the history of Metazoa. Our theory also provides a simple explanation to a long-standing question of why insects are so rare in marine environments. In previous reviews, we have mainly focused on the details of the biochemical processes occurring in arthropod cuticles, but here only the essence of our theory is extracted and briefly summarized with newly added information.</p>","PeriodicalId":20081,"journal":{"name":"Physiological Entomology","volume":"48 2-3","pages":"55-60"},"PeriodicalIF":1.5,"publicationDate":"2023-04-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/phen.12406","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"50135472","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Giovanna do Prado Ribeiro, Samir Moura Kadri, Luis Antônio Justulin, Paulo Eduardo Martins Ribolla, Ricardo de Oliveira Orsi
{"title":"Zinc methionine or zinc sulphate supplementation modulate the development of the hypopharyngeal gland and expression of major royal jelly protein genes in Apis mellifera L. bees","authors":"Giovanna do Prado Ribeiro, Samir Moura Kadri, Luis Antônio Justulin, Paulo Eduardo Martins Ribolla, Ricardo de Oliveira Orsi","doi":"10.1111/phen.12407","DOIUrl":"https://doi.org/10.1111/phen.12407","url":null,"abstract":"<p>We analysed whether the source of zinc (inorganic and organic) influences the morphology of the hypopharyngeal gland (HPG) and the relative expression of major royal jelly protein (MRJP) genes in nursing bees at 6 days of age. For this, 15 colonies of <i>Apis mellifera</i> bees were subjected to the following treatments: Zn0 (control), zinc methionine (50 ppm) and zinc sulphate monohydrate (50 ppm) during the off-season (characterized by food reduction). MRJP1 and MRJP5 gene expression was analysed using real-time PCR and HPG sections under a microscope. Bee mortality and population development were also evaluated for 30 days. It was observed that the honeybees consumed all sugar syrup containing zinc both in its organic and inorganic forms, which did not promote mortality or affect population development. Regarding HPG morphometry, it was observed that zinc, regardless of the source, promoted the acini area significantly greater than that of the control. Zn methionine promoted a significant increase in HPG area compared with that of an inorganic source. The relative expression of MRJP1 and MRJP5 was not significantly affected compared with the control. We conclude that the mineral Zn promotes an increase in the HPG area and does not alter the pattern of expression of the MRJP1 and MRJP5 genes, and that the organic source of the mineral presents the best results.</p>","PeriodicalId":20081,"journal":{"name":"Physiological Entomology","volume":"48 2-3","pages":"90-96"},"PeriodicalIF":1.5,"publicationDate":"2023-04-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"50139911","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Sunil Shivananjappa, Kevin D. Floate, Paul G. Fields, Robert A. Laird
{"title":"Retrogressive moulting in khapra beetle, Trogoderma granarium (Coleoptera: Dermestidae)\u0000 ಖಾಪ್ರ ಜೀರುಂಡೆಯಲ್ಲಿ ಹಿಮ್ಮುಖ ಪೊರೆ ಬಿಡುವಿಕೆ","authors":"Sunil Shivananjappa, Kevin D. Floate, Paul G. Fields, Robert A. Laird","doi":"10.1111/phen.12404","DOIUrl":"https://doi.org/10.1111/phen.12404","url":null,"abstract":"<p>Insect larvae typically moult to grow, but here we investigate insect larvae that moult to shrink; that is, retrogressive moulting or retrogressive development. We demonstrate this phenomenon in khapra beetle, <i>Trogoderma granarium</i> Everts (Dermestidae), among the world's most invasive pests of stored grains and cereal products, and a quarantine pest of interest for many countries. Larvae survived a 3-month period of starvation, moulting up to six times and reducing their body mass by about half, on average. When reprovisioned with food, most larvae resumed the normal trajectory of development and pupated within a month. Thus, retrogressive development is a mechanism that may favour species whose resources exhibit feast-or-famine dynamics. By enabling survival during periods of privation, retrogressive development contributes to the invasiveness of the khapra beetle by allowing them to persist for long periods in empty storage facilities or empty containers used for international grain shipments.</p>","PeriodicalId":20081,"journal":{"name":"Physiological Entomology","volume":"48 2-3","pages":"75-82"},"PeriodicalIF":1.5,"publicationDate":"2023-01-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"50143396","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}