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Colizzi FS, Martínez-Torres D, Helfrich-Förster C. The circadian and photoperiodic clock of the pea aphid. J Comp Physiol A Neuroethol Sens Neural Behav Physiol 2024; 210:627-639. [PMID: 37482577 PMCID: PMC11226554 DOI: 10.1007/s00359-023-01660-8] [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: 04/28/2023] [Revised: 07/13/2023] [Accepted: 07/14/2023] [Indexed: 07/25/2023]
Abstract
The pea aphid, Acyrthosiphon pisum, is a paradigmatic photoperiodic species that exhibits a remarkable annual life cycle, which is tightly coupled to the seasonal changes in day length. During spring and summer, characterised by longer days, aphid populations consist exclusively of viviparous females that reproduce parthenogenetically. When autumn comes and the days shorten, aphids switch their reproductive mode and generate males and oviparous sexual females, which mate and produce cold-resistant eggs that overwinter and survive the unfavourable season. While the photoperiodic responses have been well described, the nature of the timing mechanisms which underlie day length discrimination are still not completely understood. Experiments from the 1960's suggested that aphids rely on an 'hourglass' clock measuring the elapsed time during the dark night by accumulating a biochemical factor, which reaches a critical threshold at a certain night length and triggers the switch in reproduction mode. However, the photoperiodic responses of aphids can also be attributed to a strongly dampened circadian clock. Recent studies have uncovered the molecular components and the location of the circadian clock in the brain of the pea aphid and revealed that it is well connected to the neurohormonal system controlling aphid reproduction. We provide an overview of the putative mechanisms of photoperiodic control in aphids, from the photoreceptors involved in this process to the circadian clock and the neuroendocrine system.
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Affiliation(s)
- Francesca Sara Colizzi
- University of Würzburg, Neurobiology and Genetics, Biocenter, Am Hubland, 97074, Würzburg, Germany
| | - David Martínez-Torres
- Institut de Biologia Integrativa de Sistemes, Parc Cientific Universitat de València, C/ Catedrático José Beltrán nº 2, 46980, Paterna,, València, Spain
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Cuti P, Barberà M, Veenstra JA, Martínez-Torres D. Progress in the characterization of insulin-like peptides in aphids: Immunohistochemical mapping of ILP4. INSECT BIOCHEMISTRY AND MOLECULAR BIOLOGY 2021; 136:103623. [PMID: 34246764 DOI: 10.1016/j.ibmb.2021.103623] [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: 03/26/2021] [Revised: 07/07/2021] [Accepted: 07/07/2021] [Indexed: 06/13/2023]
Abstract
Aphids were the first animals described as photoperiodic due to their seasonal switch from viviparous parthenogenesis to sexual reproduction (cyclical parthenogenesis) caused by the shortening of the photoperiod in autumn. This switch produces a single sexual generation of oviparous females and males that mate and lay diapausing cold-resistant eggs that can overcome the unfavourable environmental conditions typical of winter in temperate regions. Previous studies have hinted at a possible implication of two insulin-like peptides (ILP1 and ILP4) in the aphid seasonal response, changing their expression levels between different photoperiodic conditions. Moreover, in situ localization of their transcripts in particular neurosecretory cells (NSCs) in the aphid brain supported the idea that these neuropeptides could correspond to the formerly called virginoparin, an uncharacterized factor originally proposed to be transported directly to the aphid embryos to promote their development as parthenogenetic individuals. To further investigate the fate of these ILPs, we raised a specific antiserum against one of them (ILP4) and mapped this neuropeptide by immunohistochemistry (IHC) in Acyrthosiphon pisum and Megoura viciae aphids. Coincident with in situ localization, our results show that ILP4 is synthesized in two groups (one in each brain hemisphere) of four neurosecretory cells in the pars intercerebralis (NSC group I) and then it is transported outside the brain to the corpora cardiaca. From there, three nerves (two laterals and one medial) transport it to the abdomen. Although no precise site of release has been found, the terminations of these nerves near the germaria would be compatible with the proposal of a direct connection between group I of NSCs and the reproductive system by localized release. In addition, we detected some collateral arborizations originating from the eight NSCs going to the pars lateralis, where clock neurons and some photoreceptors have been previously localized, suggesting a possible communication between the circadian and photoperiodic systems.
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Affiliation(s)
- Paolo Cuti
- Institut de Biologia Integrativa de Sistemes, Parc Cientific, Universitat de València, C/ Catedràtic Agustín Escardino Benlloch, 9, 46980, Paterna, València, Spain
| | - Miquel Barberà
- Institut de Biologia Integrativa de Sistemes, Parc Cientific, Universitat de València, C/ Catedràtic Agustín Escardino Benlloch, 9, 46980, Paterna, València, Spain
| | - Jan A Veenstra
- Université de Bordeaux, INCIA CNRS UMR, 5287, Talence, France
| | - David Martínez-Torres
- Institut de Biologia Integrativa de Sistemes, Parc Cientific, Universitat de València, C/ Catedràtic Agustín Escardino Benlloch, 9, 46980, Paterna, València, Spain.
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Matsuda N, Numata H, Udaka H. Transcriptomic changes in the pea aphid, Acyrthosiphon pisum: Effects of the seasonal timer and photoperiod. COMPARATIVE BIOCHEMISTRY AND PHYSIOLOGY D-GENOMICS & PROTEOMICS 2020; 36:100740. [PMID: 32906053 DOI: 10.1016/j.cbd.2020.100740] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/02/2020] [Revised: 07/28/2020] [Accepted: 08/27/2020] [Indexed: 12/11/2022]
Abstract
Many insect species use photoperiod as a cue for induction of seasonal responses, including seasonal polyphenism. Although most aphid species viviparously produce parthenogenetic and sexual morphs under long and short days, respectively, a seasonal timer suppresses the sexual morph production over several successive generations during a few months following hatching of a sexually produced diapause egg. To reveal the relative influences of photoperiod and the seasonal timer on the reproductive polyphenism at the gene expression level, we performed RNA sequencing-based transcriptome analyses in the pea aphid, Acyrthosiphon pisum (Hemiptera: Aphididae). Under short days, aphids with an expired seasonal timer showed a higher expression level in hundreds of genes than those with an operative seasonal timer. In contrast, aphids with an operative seasonal timer did not show upregulation in most of these genes. Functional annotations based on gene ontology showed that histone modifications and small non-coding RNA pathways were enriched in aphids with an expired seasonal timer under short-day conditions, suggesting that these epigenetic regulations on gene expression might be involved in a mechanism of maternal switching from the parthenogenetic to sexual morph production.
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Affiliation(s)
- Naoki Matsuda
- Graduate School of Science, Kyoto University, Sakyo, Kyoto 606-8502, Japan
| | - Hideharu Numata
- Graduate School of Science, Kyoto University, Sakyo, Kyoto 606-8502, Japan
| | - Hiroko Udaka
- Graduate School of Science, Kyoto University, Sakyo, Kyoto 606-8502, Japan.
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Wieczorek K, Kanturski M, Sempruch C, Świątek P. The reproductive system of the male and oviparous female of a model organism-the pea aphid, Acyrthosiphon pisum (Hemiptera, Aphididae). PeerJ 2019; 7:e7573. [PMID: 31534847 PMCID: PMC6727839 DOI: 10.7717/peerj.7573] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2019] [Accepted: 07/29/2019] [Indexed: 01/21/2023] Open
Abstract
The structure of the reproductive system of the sexual generation-males and oviparous females-of the pea aphid Acyrthosiphon pisum (Harris) (Hemiptera, Aphididae), a serious pest of cultivated plants of Fabaceae, was investigated. For the first time we describe the morphology, histology and ultrastructure of the reproductive system in both morphs of the sexual generation of aphids within one species, using light and fluorescent microscopy, as well as transmission and scanning electron microscopy. The results revealed that males have testes composed of three follicles fused by the upper ends of the vasa efferentia, the vasa deferentia run independently, the accessory glands are asymmetric and the ejaculatory duct shortened. Oviparous females have ovaries composed of seven ovarioles each. The lateral oviducts join to a short common oviduct connected with the unpaired spermatheca and paired accessory glands. Yolky eggs with an aggregation of symbiotic bacteria at the posterior pole are produced. Histologically, the components of genital tracts are broadly similar: the epithelial cells of the walls of the vasa deferentia and accessory glands of the male and oviparous female have secretory functions which correlate with the age of the studied morphs. We also found symbiotic bacteria within the vasa deferentia epithelial cells in males and within the cells of the lateral oviducts of females. Because the pea aphid is listed among the 14 species that are of the greatest economic importance, our results will be useful for managing aphid populations, protecting plants and ensuring global food security.
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Affiliation(s)
- Karina Wieczorek
- Department of Zoology, University of Silesia in Katowice, Katowice, Poland
| | - Mariusz Kanturski
- Department of Zoology, University of Silesia in Katowice, Katowice, Poland
| | - Cezary Sempruch
- Department of Biochemistry and Molecular Biology, Siedlce University of Natural Sciences and Humanities, Siedlce, Poland
| | - Piotr Świątek
- Department of Animal Histology and Embryology, University of Silesia in Katowice, Katowice, Poland
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Collantes-Alegre JM, Mattenberger F, Barberà M, Martínez-Torres D. Characterisation, analysis of expression and localisation of the opsin gene repertoire from the perspective of photoperiodism in the aphid Acyrthosiphon pisum. JOURNAL OF INSECT PHYSIOLOGY 2018; 104:48-59. [PMID: 29203177 DOI: 10.1016/j.jinsphys.2017.11.009] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/27/2017] [Revised: 10/19/2017] [Accepted: 11/30/2017] [Indexed: 06/07/2023]
Abstract
Organisms exhibit a wide range of seasonal responses as adaptions to predictable annual changes in their environment. These changes are originally caused by the effect of the Earth's cycles around the sun and its axial tilt. Examples of seasonal responses include floration, migration, reproduction and diapause. In temperate climate zones, the most robust variable to predict seasons is the length of the day (i.e. the photoperiod). The first step to trigger photoperiodic driven responses involves measuring the duration of the light-dark phases, but the molecular clockwork performing this task is poorly characterized. Photopigments such as opsins are known to participate in light perception, being part of the machinery in charge of providing information about the luminous state of the surroundings. Aphids (Hemiptera: Aphididae) are paradigmatic photoperiodic insects, exhibiting a strong induction to diapause when the light regime mimics autumn conditions. The availability of the pea aphid (Acyrthosiphon pisum) genome has facilitated molecular approaches to understand the effect of light stimulus in the photoperiodic induction process. We have identified, experimentally validated and characterized the expression of the full opsin gene repertoire in the pea aphid. Among identified opsin genes in A. pisum, arthropsin is absent in most insects sequenced to date (except for dragonflies and two other hemipterans) but also present in a crustacean, an onychophoran and chelicerates. We have quantified the expression of these genes in aphids exposed to different photoperiodic conditions and at different times of the day and localized their transcripts in the aphid brain. Clear differences in expression patterns were found, thus relating opsin expression with the photoperiodic response.
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Affiliation(s)
- Jorge Mariano Collantes-Alegre
- Institut de Biologia Integrativa de Sistemes, Parc Científic Universitat de València, C/Catedrático José Beltrán n° 2, 46980 Paterna, València, Spain
| | - Florian Mattenberger
- Institut de Biologia Integrativa de Sistemes, Parc Científic Universitat de València, C/Catedrático José Beltrán n° 2, 46980 Paterna, València, Spain; Department of Abiotic Stress, Instituto de Biología Molecular y Celular de Plantas, Consejo Superior de Investigaciones Científicas-Universidad Politécnica de Valencia, Valencia 46022, Spain
| | - Miquel Barberà
- Institut de Biologia Integrativa de Sistemes, Parc Científic Universitat de València, C/Catedrático José Beltrán n° 2, 46980 Paterna, València, Spain
| | - David Martínez-Torres
- Institut de Biologia Integrativa de Sistemes, Parc Científic Universitat de València, C/Catedrático José Beltrán n° 2, 46980 Paterna, València, Spain.
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Barberà M, Martínez-Torres D. Identification of the prothoracicotropic hormone (Ptth) coding gene and localization of its site of expression in the pea aphid Acyrthosiphon pisum. INSECT MOLECULAR BIOLOGY 2017; 26:654-664. [PMID: 28677913 DOI: 10.1111/imb.12326] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Insect hormones control essential aspects of physiology, behaviour and development in insects. The majority of insect hormones are peptide hormones that perform a highly diverse catalogue of functions. Prothoracicotropic hormone (PTTH) is a brain neuropeptide hormone whose main function is to stimulate the secretion of ecdysone (the moulting hormone) by the prothoracic glands in insect larvae thus playing a key role in the control of moulting and metamorphosis. Moreover, both PTTH release or blockade have been reported to act as a switch to terminate or initiate larval and pupal diapauses. In insects, diapause is a prevalent response often regulated by the photoperiod. It has been shown that PTTH participates as an output of the circadian clock and a role in photoperiodic processes is suggested in some insect species. Aphids (Hemiptera: Aphididae) reproduce by cyclical parthenogenesis with a sexual phase, induced by short photoperiods, that leads to the production of diapausing eggs. With the availability of the pea aphid (Acyrthosiphon pisum) genome, efforts to identify and characterize genes relevant to essential aspects of aphid biology have multiplied. In spite of its relevance, several genomic and transcriptomic studies on aphid neuropeptides failed to detect aphid PTTH amongst them. Here we report on the first identification of the aphid PTTH coding gene and the neuroanatomical localization of its expression in the aphid brain.
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Affiliation(s)
- M Barberà
- Institut de Biologia Integrativa de Sistemes & Institut Cavanilles de Biodiversitat i Biologia Evolutiva, Parc Cientific Universitat de Valencia, Paterna, València, Spain
| | - D Martínez-Torres
- Institut de Biologia Integrativa de Sistemes & Institut Cavanilles de Biodiversitat i Biologia Evolutiva, Parc Cientific Universitat de Valencia, Paterna, València, Spain
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Mathers TC, Chen Y, Kaithakottil G, Legeai F, Mugford ST, Baa-Puyoulet P, Bretaudeau A, Clavijo B, Colella S, Collin O, Dalmay T, Derrien T, Feng H, Gabaldón T, Jordan A, Julca I, Kettles GJ, Kowitwanich K, Lavenier D, Lenzi P, Lopez-Gomollon S, Loska D, Mapleson D, Maumus F, Moxon S, Price DRG, Sugio A, van Munster M, Uzest M, Waite D, Jander G, Tagu D, Wilson ACC, van Oosterhout C, Swarbreck D, Hogenhout SA. Rapid transcriptional plasticity of duplicated gene clusters enables a clonally reproducing aphid to colonise diverse plant species. Genome Biol 2017; 18:27. [PMID: 28190401 PMCID: PMC5304397 DOI: 10.1186/s13059-016-1145-3] [Citation(s) in RCA: 172] [Impact Index Per Article: 24.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2016] [Accepted: 12/22/2016] [Indexed: 12/04/2022] Open
Abstract
Background The prevailing paradigm of host-parasite evolution is that arms races lead to increasing specialisation via genetic adaptation. Insect herbivores are no exception and the majority have evolved to colonise a small number of closely related host species. Remarkably, the green peach aphid, Myzus persicae, colonises plant species across 40 families and single M. persicae clonal lineages can colonise distantly related plants. This remarkable ability makes M. persicae a highly destructive pest of many important crop species. Results To investigate the exceptional phenotypic plasticity of M. persicae, we sequenced the M. persicae genome and assessed how one clonal lineage responds to host plant species of different families. We show that genetically identical individuals are able to colonise distantly related host species through the differential regulation of genes belonging to aphid-expanded gene families. Multigene clusters collectively upregulate in single aphids within two days upon host switch. Furthermore, we demonstrate the functional significance of this rapid transcriptional change using RNA interference (RNAi)-mediated knock-down of genes belonging to the cathepsin B gene family. Knock-down of cathepsin B genes reduced aphid fitness, but only on the host that induced upregulation of these genes. Conclusions Previous research has focused on the role of genetic adaptation of parasites to their hosts. Here we show that the generalist aphid pest M. persicae is able to colonise diverse host plant species in the absence of genetic specialisation. This is achieved through rapid transcriptional plasticity of genes that have duplicated during aphid evolution. Electronic supplementary material The online version of this article (doi:10.1186/s13059-016-1145-3) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Thomas C Mathers
- Earlham Institute, Norwich Research Park, Norwich, NR4 7UZ, UK.,The International Aphid Genomics Consortium, Miami, USA
| | - Yazhou Chen
- John Innes Centre, Norwich Research Park, Norwich, NR4 7UH, UK.,The International Aphid Genomics Consortium, Miami, USA
| | | | - Fabrice Legeai
- The International Aphid Genomics Consortium, Miami, USA.,INRA, UMR 1349 IGEPP (Institute of Genetics Environment and Plant Protection), Domaine de la Motte, 35653, Le Rheu Cedex, France.,IRISA/INRIA, GenOuest Core Facility, Campus de Beaulieu, Rennes, 35042, France
| | - Sam T Mugford
- John Innes Centre, Norwich Research Park, Norwich, NR4 7UH, UK.,The International Aphid Genomics Consortium, Miami, USA
| | - Patrice Baa-Puyoulet
- The International Aphid Genomics Consortium, Miami, USA.,Univ Lyon, INSA-Lyon, INRA, BF2I, UMR0203, F-69621, Villeurbanne, France
| | - Anthony Bretaudeau
- The International Aphid Genomics Consortium, Miami, USA.,INRA, UMR 1349 IGEPP (Institute of Genetics Environment and Plant Protection), Domaine de la Motte, 35653, Le Rheu Cedex, France.,IRISA/INRIA, GenOuest Core Facility, Campus de Beaulieu, Rennes, 35042, France
| | | | - Stefano Colella
- The International Aphid Genomics Consortium, Miami, USA.,Univ Lyon, INSA-Lyon, INRA, BF2I, UMR0203, F-69621, Villeurbanne, France.,Present Address: INRA, UMR1342 IRD-CIRAD-INRA-SupAgro-Université de Montpellier, Laboratoire des Symbioses Tropicales et Méditéranéennes, Campus International de Baillarguet, TA-A82/J, F-34398, Montpellier cedex 5, France
| | - Olivier Collin
- IRISA/INRIA, GenOuest Core Facility, Campus de Beaulieu, Rennes, 35042, France
| | - Tamas Dalmay
- School of Biological Sciences, University of East Anglia, Norwich Research Park, Norwich, NR4 7TJ, UK
| | - Thomas Derrien
- CNRS, UMR 6290, Institut de Génétique et Developpement de Rennes, Université de Rennes 1, 2 Avenue du Pr. Léon Bernard, 35000, Rennes, France
| | - Honglin Feng
- The International Aphid Genomics Consortium, Miami, USA.,Department of Biology, University of Miami, Coral Gables, FL, 33146, USA
| | - Toni Gabaldón
- The International Aphid Genomics Consortium, Miami, USA.,Centre for Genomic Regulation (CRG), The Barcelona Institute of Science and Technology, Dr. Aiguader 88, Barcelona, 08003, Spain.,Universitat Pompeu Fabra (UPF), 08003, Barcelona, Spain.,Institució Catalana de Recerca i Estudis Avançats (ICREA), Pg. Lluís Companys 23, 08010, Barcelona, Spain
| | - Anna Jordan
- John Innes Centre, Norwich Research Park, Norwich, NR4 7UH, UK
| | - Irene Julca
- The International Aphid Genomics Consortium, Miami, USA.,Centre for Genomic Regulation (CRG), The Barcelona Institute of Science and Technology, Dr. Aiguader 88, Barcelona, 08003, Spain.,Universitat Pompeu Fabra (UPF), 08003, Barcelona, Spain
| | - Graeme J Kettles
- John Innes Centre, Norwich Research Park, Norwich, NR4 7UH, UK.,Present address: Rothamsted Research, Harpenden, Hertforshire, ALF5 2JQ, UK
| | - Krissana Kowitwanich
- John Innes Centre, Norwich Research Park, Norwich, NR4 7UH, UK.,Present address: J. R. Simplot Company, Boise, ID, USA
| | - Dominique Lavenier
- IRISA/INRIA, GenOuest Core Facility, Campus de Beaulieu, Rennes, 35042, France
| | - Paolo Lenzi
- John Innes Centre, Norwich Research Park, Norwich, NR4 7UH, UK.,Present address: Alson H. Smith Jr. Agriculture and Extension Center, Virginia Tech, Winchester, 22602, VA, USA
| | - Sara Lopez-Gomollon
- School of Biological Sciences, University of East Anglia, Norwich Research Park, Norwich, NR4 7TJ, UK.,Present address: Department of Plant Sciences, University of Cambridge, Downing Street, Cambridge, CB2 3EA, UK
| | - Damian Loska
- The International Aphid Genomics Consortium, Miami, USA.,Centre for Genomic Regulation (CRG), The Barcelona Institute of Science and Technology, Dr. Aiguader 88, Barcelona, 08003, Spain.,Universitat Pompeu Fabra (UPF), 08003, Barcelona, Spain
| | - Daniel Mapleson
- Earlham Institute, Norwich Research Park, Norwich, NR4 7UZ, UK
| | - Florian Maumus
- The International Aphid Genomics Consortium, Miami, USA.,Unité de Recherche Génomique-Info (URGI), INRA, Université Paris-Saclay, 78026, Versailles, France
| | - Simon Moxon
- Earlham Institute, Norwich Research Park, Norwich, NR4 7UZ, UK
| | - Daniel R G Price
- The International Aphid Genomics Consortium, Miami, USA.,Department of Biology, University of Miami, Coral Gables, FL, 33146, USA.,Present address: Moredun Research Institute, Pentlands Science Park, Bush Loan, Penicuik, Midlothian, EH26 0PZ, UK
| | - Akiko Sugio
- John Innes Centre, Norwich Research Park, Norwich, NR4 7UH, UK.,INRA, UMR 1349 IGEPP (Institute of Genetics Environment and Plant Protection), Domaine de la Motte, 35653, Le Rheu Cedex, France
| | - Manuella van Munster
- The International Aphid Genomics Consortium, Miami, USA.,INRA, UMR BGPI, CIRAD TA-A54K, Campus International de Baillarguet, 34398, Montpellier Cedex 5, France
| | - Marilyne Uzest
- The International Aphid Genomics Consortium, Miami, USA.,INRA, UMR BGPI, CIRAD TA-A54K, Campus International de Baillarguet, 34398, Montpellier Cedex 5, France
| | - Darren Waite
- Earlham Institute, Norwich Research Park, Norwich, NR4 7UZ, UK
| | - Georg Jander
- The International Aphid Genomics Consortium, Miami, USA.,Boyce Thompson Institute for Plant Research, Ithaca, NY, 14853, USA
| | - Denis Tagu
- The International Aphid Genomics Consortium, Miami, USA.,INRA, UMR 1349 IGEPP (Institute of Genetics Environment and Plant Protection), Domaine de la Motte, 35653, Le Rheu Cedex, France
| | - Alex C C Wilson
- The International Aphid Genomics Consortium, Miami, USA.,Department of Biology, University of Miami, Coral Gables, FL, 33146, USA
| | - Cock van Oosterhout
- The International Aphid Genomics Consortium, Miami, USA.,School of Environmental Sciences, University of East Anglia, Norwich Research Park, Norwich, NR4 7TJ, UK
| | - David Swarbreck
- Earlham Institute, Norwich Research Park, Norwich, NR4 7UZ, UK. .,The International Aphid Genomics Consortium, Miami, USA. .,School of Environmental Sciences, University of East Anglia, Norwich Research Park, Norwich, NR4 7TJ, UK.
| | - Saskia A Hogenhout
- John Innes Centre, Norwich Research Park, Norwich, NR4 7UH, UK. .,The International Aphid Genomics Consortium, Miami, USA. .,School of Environmental Sciences, University of East Anglia, Norwich Research Park, Norwich, NR4 7TJ, UK.
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Chen ZZ, Liu LY, Liu SY, Cheng LY, Wang XH, Xu YY. Response of Chrysoperla nipponensis (Okamoto) (Neuroptera: Chrysopidae) Under Long and Short Photoperiods. JOURNAL OF INSECT SCIENCE (ONLINE) 2017; 17:3061611. [PMID: 28355473 PMCID: PMC5416781 DOI: 10.1093/jisesa/iex005] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/30/2016] [Indexed: 05/15/2023]
Abstract
Photoperiod is an important factor influencing many biological processes including population dynamics of many insect species in temperate zones. To determine the population response of Chrysoperla nipponensis under altered conditions (high temperature and short photoperiod) and to test whether the short photoperiod was suitable for artificial storage, the life table data of were collected at 25 °C under a long photoperiod, 15:9 h (L:D), and a short photoperiod, 9:15 h (L:D) and analyzed using the age-stage, two-sex life table approach. We found that developed faster under long photoperiod than under the short photoperiod. The shorter developmental time, higher fecundity, and higher proportion of females found during the long photoperiod resulted in higher intrinsic and net reproductive rates, but a shorter mean generation time and life expectancy compared to those reared during the short photoperiod. Individuals reared under the short photoperiod also had a high reproductive value. Population projection demonstrated that reared at long photoperiod would complete four generations in 150 d, while reared under short photoperiod would just be entering the second generation. Our results demonstrated that the different fitness values obtained for individuals by varying photoperiod lengths, were readily distinguishable when using the age-stage, two-sex life table.
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Affiliation(s)
- Zhen Z. Chen
- Department of Entomology, Shandong Agricultural University, Taian, Shandong, 271018, P. R. China
| | - L. Y. Liu
- Department of Entomology, Shandong Agricultural University, Taian, Shandong, 271018, P. R. China
| | - S. Y. Liu
- Department of Entomology, Shandong Agricultural University, Taian, Shandong, 271018, P. R. China
| | - L. Y. Cheng
- Department of Entomology, Shandong Agricultural University, Taian, Shandong, 271018, P. R. China
| | - X. H. Wang
- The State Key Laboratory of Integrated Management of Pest Insects and Rodents, Institute of Zoology, Chinese Academy of Sciences, Beijing, 100101, P. R. China ()
| | - Y. Y. Xu
- Department of Entomology, Shandong Agricultural University, Taian, Shandong, 271018, P. R. China
- Corresponding author, e-mail:
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Integrative Genomic Approaches to Studying Epigenetic Mechanisms of Phenotypic Plasticity in the Aphid. SHORT VIEWS ON INSECT GENOMICS AND PROTEOMICS 2015. [DOI: 10.1007/978-3-319-24235-4_5] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
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10
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A comparative proteomic analysis of parthenogenetic lines and amphigenetic lines of silkworm. BIOTECHNOL BIOPROC E 2014. [DOI: 10.1007/s12257-014-0099-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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11
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Dubreuil G, Deleury E, Crochard D, Simon JC, Coustau C. Diversification of MIF immune regulators in aphids: link with agonistic and antagonistic interactions. BMC Genomics 2014. [PMID: 25193628 DOI: 10.1186/1471.2164.15.762] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/26/2023] Open
Abstract
BACKGROUND The widespread use of genome sequencing provided evidences for the high degree of conservation in innate immunity signalling pathways across animal phyla. However, the functioning and evolutionary history of immune-related genes remains unknown for most invertebrate species. A striking observation coming from the analysis of the pea aphid Acyrthosiphon pisum genome is the absence of important conserved genes known to be involved in the antimicrobial responses of other insects. This reduction in antibacterial immune defences is thought to be related to their long-term association with beneficial symbiotic bacteria and to facilitate symbiont maintenance. An additional possibility to avoid elimination of mutualistic symbionts is a fine-tuning of the host immune response. To explore this hypothesis we investigated the existence and potential involvement of immune regulators in aphid agonistic and antagonistic interactions. RESULTS In contrast to the limited antibacterial arsenal, we showed that the pea aphid Acyrthosiphon pisum expresses 5 members of Macrophage Migration Inhibitory Factors (ApMIF), known to be key regulators of the innate immune response. In silico searches for MIF members in insect genomes followed by phylogenetic reconstruction suggest that evolution of MIF genes in hemipteran species has been shaped both by differential losses and serial duplications, raising the question of the functional importance of these genes in aphid immune responses. Expression analyses of ApMIFs revealed reduced expression levels in the presence, or during the establishment of secondary symbionts. By contrast, ApMIFs expression levels significantly increased upon challenge with a parasitoid or a Gram-negative bacteria. This increased expression in the presence of a pathogen/parasitoid was reduced or missing, in the presence of facultative symbiotic bacteria. CONCLUSIONS This work provides evidence that while aphid's antibacterial arsenal is reduced, other immune genes widely absent from insect genomes are present, diversified and differentially regulated during antagonistic or agonistic interactions.
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Affiliation(s)
| | | | | | | | - Christine Coustau
- Sophia Agrobiotech Institute, INRA-CNRS-UNS, UMR 7254, 400 Route des Chappes, 06 903 Sophia Antipolis, France.
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Diversification of MIF immune regulators in aphids: link with agonistic and antagonistic interactions. BMC Genomics 2014; 15:762. [PMID: 25193628 PMCID: PMC4169804 DOI: 10.1186/1471-2164-15-762] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2014] [Accepted: 08/18/2014] [Indexed: 12/03/2022] Open
Abstract
Background The widespread use of genome sequencing provided evidences for the high degree of conservation in innate immunity signalling pathways across animal phyla. However, the functioning and evolutionary history of immune-related genes remains unknown for most invertebrate species. A striking observation coming from the analysis of the pea aphid Acyrthosiphon pisum genome is the absence of important conserved genes known to be involved in the antimicrobial responses of other insects. This reduction in antibacterial immune defences is thought to be related to their long-term association with beneficial symbiotic bacteria and to facilitate symbiont maintenance. An additional possibility to avoid elimination of mutualistic symbionts is a fine-tuning of the host immune response. To explore this hypothesis we investigated the existence and potential involvement of immune regulators in aphid agonistic and antagonistic interactions. Results In contrast to the limited antibacterial arsenal, we showed that the pea aphid Acyrthosiphon pisum expresses 5 members of Macrophage Migration Inhibitory Factors (ApMIF), known to be key regulators of the innate immune response. In silico searches for MIF members in insect genomes followed by phylogenetic reconstruction suggest that evolution of MIF genes in hemipteran species has been shaped both by differential losses and serial duplications, raising the question of the functional importance of these genes in aphid immune responses. Expression analyses of ApMIFs revealed reduced expression levels in the presence, or during the establishment of secondary symbionts. By contrast, ApMIFs expression levels significantly increased upon challenge with a parasitoid or a Gram-negative bacteria. This increased expression in the presence of a pathogen/parasitoid was reduced or missing, in the presence of facultative symbiotic bacteria. Conclusions This work provides evidence that while aphid’s antibacterial arsenal is reduced, other immune genes widely absent from insect genomes are present, diversified and differentially regulated during antagonistic or agonistic interactions. Electronic supplementary material The online version of this article (doi:10.1186/1471-2164-15-762) contains supplementary material, which is available to authorized users.
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Comparative transcriptional analysis of asexual and sexual morphs reveals possible mechanisms in reproductive polyphenism of the cotton aphid. PLoS One 2014; 9:e99506. [PMID: 24915491 PMCID: PMC4051768 DOI: 10.1371/journal.pone.0099506] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2014] [Accepted: 05/15/2014] [Indexed: 12/27/2022] Open
Abstract
Aphids, the destructive insect pests in the agriculture, horticulture and forestry, are capable of reproducing asexually and sexually upon environmental change. However, the molecular basis of aphid reproductive mode switch remains an enigma. Here we report a comparative analysis of differential gene expression profiling among parthenogenetic females, gynoparae and sexual females of the cotton aphid Aphis gossypii, using the RNA-seq approach with next-generation sequencing platforms, followed by RT-qPCR. At the cutoff criteria of fold change ≥2 and P<0.01, we identified 741 up- and 879 down-regulated genes in gynoparae versus parthenogenetic females, 2,101 up- and 2,210 down-regulated genes in sexual females compared to gynoparae, and 1,614 up- and 2,238 down-regulated genes in sexual females relative to parthenogenetic females. Gene ontology category and KEGG pathway analysis suggest the involvement of differentially expressed genes in multiple cellular signaling pathways into the reproductive mode transition, including phototransduction, cuticle composition, progesterone-mediated oocyte maturation and endocrine regulation. This study forms a basis for deciphering the molecular mechanisms underlying the shift from asexual to sexual reproduction in the cotton aphid. It also provides valuable resources for future studies on this host-alternating aphid species, and the insight into the understanding of reproductive mode plasticity in different aphid species.
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Ogawa K, Miura T. Aphid polyphenisms: trans-generational developmental regulation through viviparity. Front Physiol 2014; 5:1. [PMID: 24478714 PMCID: PMC3900772 DOI: 10.3389/fphys.2014.00001] [Citation(s) in RCA: 73] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2013] [Accepted: 01/01/2014] [Indexed: 12/15/2022] Open
Abstract
Polyphenism, in which multiple discrete phenotypes develop from a single genotype, is considered to have contributed to the evolutionary success of aphids. Of the various polyphenisms observed in the complex life cycle of aphids, the reproductive and wing polyphenisms seen in most aphid species are conspicuous. In reproductive polyphenism, the reproductive modes can change between viviparous parthenogenesis and sexual reproduction in response to the photoperiod. Under short-day conditions in autumn, sexual morphs (males and oviparous females) are produced parthenogenetically. Winged polyphenism is observed in viviparous generations during summer, when winged or wingless (flightless) aphids are produced depending on a variety of environmental conditions (e.g., density, predators). Here, we review the physiological mechanisms underlying reproductive and wing polyphenism in aphids. In reproductive polyphenism, morph determination (male, oviparous or viviparous female) within mother aphids is regulated by juvenile hormone (JH) titers in the mothers. In wing polyphenism, although JH is considered to play an important role in phenotype determination (winged or wingless), the role is still controversial. In both cases, the acquisition of viviparity in Aphididae is considered to be the basis for maternal regulation of these polyphenisms, and through which environmental cues can be transferred to developing embryos through the physiological state of the mother. Although the mechanisms by which mothers alter the developmental programs of their progeny have not yet been clarified, continued developments in molecular biology will likely unravel these questions.
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Affiliation(s)
- Kota Ogawa
- Laboratory of Ecological Genetics, Graduate School of Environmental Science, Hokkaido University Sapporo, Japan
| | - Toru Miura
- Laboratory of Ecological Genetics, Graduate School of Environmental Science, Hokkaido University Sapporo, Japan
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15
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Barberà M, Mengual B, Collantes-Alegre JM, Cortés T, González A, Martínez-Torres D. Identification, characterization and analysis of expression of genes encoding arylalkylamine N-acetyltransferases in the pea aphid Acyrthosiphon pisum. INSECT MOLECULAR BIOLOGY 2013; 22:623-634. [PMID: 23919438 DOI: 10.1111/imb.12050] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
Most organisms exhibit some kind of rhythmicity in their behaviour and/or physiology as an adaptation to the cyclical movements of the Earth. In addition to circadian rhythms, many organisms have an annual rhythmicity in certain activities, such as reproduction, migration or induction of diapause. Current knowledge of the molecular basis controlling seasonal rhythmicity, especially in insects, is scarce. One element that seems to play an essential role in the maintenance of both circadian and seasonal rhythms in vertebrates is the hormone melatonin. In vertebrates, the limiting enzyme in its synthesis is the arylalkylamine N-acetyltransferase (AANAT). Melatonin is also present in insects but the precise biochemical pathway and the enzymes involved in its synthesis are unknown. Insects possess phylogenetically distant arylalkylamine N-acetyltransferases but their involvement in melatonin synthesis still needs to be fully demonstrated. Aphids have a seasonally rhythmical life cycle, reproducing parthenogenetically by viviparity in favourable seasons but, in unfavourable seasons, they produce a single generation of sexual individuals. The length of the photoperiod is the main environmental factor that controls the mode of reproduction in aphids. Taking advantage of the availability of the genome of the aphid Acyrthosiphon pisum, we searched for genes encoding aphid arylalkylamine N-acetyltransferase homologues that could be candidates for participation in seasonal rhythmicity. We identified four AANAT genes, of which at least two (Ap-AANAT1 and Ap-AANAT3) showed highly significant variation in transcription levels depending on the photoperiod conditions. These results are discussed in the context of how seasonality can be controlled in aphids.
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Affiliation(s)
- M Barberà
- Institut Cavanilles de Biodiversitat i Biologia Evolutiva, Universitat de València, Valencia, Spain
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16
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Le Trionnaire G, Jaubert-Possamai S, Bonhomme J, Gauthier JP, Guernec G, Le Cam A, Legeai F, Monfort J, Tagu D. Transcriptomic profiling of the reproductive mode switch in the pea aphid in response to natural autumnal photoperiod. JOURNAL OF INSECT PHYSIOLOGY 2012; 58:1517-1524. [PMID: 22967755 DOI: 10.1016/j.jinsphys.2012.07.009] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/07/2012] [Revised: 07/10/2012] [Accepted: 07/16/2012] [Indexed: 06/01/2023]
Abstract
Aphids are among the rare organisms that can change their reproductive mode across their life cycle. During spring and summer they reproduce clonally and efficiently by parthenogenesis. At the end of summer aphids perceive the shortening of day length which triggers the production of sexual individuals - males and oviparous females - that will mate and lay overwintering cold-resistant eggs. Recent large scale transcriptomic studies allowed the discovery of transcripts and functions such as nervous and hormonal signaling involved in the early steps of detection and transduction of the photoperiodic signal. Nevertheless these experiments were performed under controlled conditions when the photoperiod was the only varying parameter. To characterize the response of aphids under natural conditions, aphids were reared outdoor both in summer and autumn and material was collected to compare their transcriptomic profile using a cDNA microarray containing around 7000 transcripts. Statistical analyses revealed that close to 5% of these transcripts (367) were differentially expressed at two developmental stages of the process in response to the autumnal environmental conditions. Functional classification of regulated transcripts confirmed the putative contribution of the neuro-endocrine system in the process. Furthermore, these experiments revealed the regulation of transcripts involved in juvenile hormone synthesis and signaling pathway, confirming the key role played by these molecules in the reproductive mode switch. Aphids placed under outdoor conditions were confronted to a range of abiotic factors such as temperature fluctuations which was confirmed by the differential expression of an important proportion of heat shock protein transcripts between the two seasons. Finally, this original approach completed the understanding of genetic programs involved in aphid phenotypic plasticity.
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Srinivasan DG, Brisson JA. Aphids: a model for polyphenism and epigenetics. GENETICS RESEARCH INTERNATIONAL 2012; 2012:431531. [PMID: 22567389 PMCID: PMC3335499 DOI: 10.1155/2012/431531] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/14/2011] [Accepted: 12/01/2011] [Indexed: 01/21/2023]
Abstract
Environmental conditions can alter the form, function, and behavior of organisms over short and long timescales, and even over generations. Aphid females respond to specific environmental cues by transmitting signals that have the effect of altering the development of their offspring. These epigenetic phenomena have positioned aphids as a model for the study of phenotypic plasticity. The molecular basis for this epigenetic inheritance in aphids and how this type of inheritance system could have evolved are still unanswered questions. With the availability of the pea aphid genome sequence, new genomics technologies, and ongoing genomics projects in aphids, these questions can now be addressed. Here, we review epigenetic phenomena in aphids and recent progress toward elucidating the molecular basis of epigenetics in aphids. The discovery of a functional DNA methylation system, functional small RNA system, and expanded set of chromatin modifying genes provides a platform for analyzing these pathways in the context of aphid plasticity. With these tools and further research, aphids are an emerging model system for studying the molecular epigenetics of polyphenisms.
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Affiliation(s)
| | - Jennifer A. Brisson
- School of Biological Sciences, University of Nebraska-Lincoln, Lincoln, NE 68588, USA
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18
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Wang MH, Marinotti O, Vardo-Zalik A, Boparai R, Yan G. Genome-wide transcriptional analysis of genes associated with acute desiccation stress in Anopheles gambiae. PLoS One 2011; 6:e26011. [PMID: 21991392 PMCID: PMC3186805 DOI: 10.1371/journal.pone.0026011] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2011] [Accepted: 09/15/2011] [Indexed: 01/24/2023] Open
Abstract
Malaria transmission in sub-Saharan Africa varies seasonally in intensity. Outbreaks of malaria occur after the beginning of the rainy season, whereas, during the dry season, reports of the disease are less frequent. Anopheles gambiae mosquitoes, the main malaria vector, are observed all year long but their densities are low during the dry season that generally lasts several months. Aestivation, seasonal migration, and local adaptation have been suggested as mechanisms that enable mosquito populations to persist through the dry season. Studies of chromosomal inversions have shown that inversions 2La, 2Rb, 2Rc, 2Rd, and 2Ru are associated with various physiological changes that confer aridity resistance. However, little is known about how phenotypic plasticity responds to seasonally dry conditions. This study examined the effects of desiccation stress on transcriptional regulation in An. gambiae. We exposed female An. gambiae G3 mosquitoes to acute desiccation and conducted a genome-wide analysis of their transcriptomes using the Affymetrix Plasmodium/Anopheles Genome Array. The transcription of 248 genes (1.7% of all transcripts) was significantly affected in all experimental conditions, including 96 with increased expression and 152 with decreased expression. In general, the data indicate a reduction in the metabolic rate of mosquitoes exposed to desiccation. Transcripts accumulated at higher levels during desiccation are associated with oxygen radical detoxification, DNA repair and stress responses. The proportion of transcripts within 2La and 2Rs (2Rb, 2Rc, 2Rd, and 2Ru) (67/248, or 27%) is similar to the percentage of transcripts located within these inversions (31%). These data may be useful in efforts to elucidate the role of chromosomal inversions in aridity tolerance. The scope of application of the anopheline genome demonstrates that examining transcriptional activity in relation to genotypic adaptations greatly expands the number of candidate regions involved in the desiccation response in this important malaria vector.
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Affiliation(s)
- Mei-Hui Wang
- Program in Public Health, University of California Irvine, Irvine, California, United States of America.
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Genomic identification of a putative circadian system in the cladoceran crustacean Daphnia pulex. COMPARATIVE BIOCHEMISTRY AND PHYSIOLOGY D-GENOMICS & PROTEOMICS 2011; 6:282-309. [PMID: 21798832 DOI: 10.1016/j.cbd.2011.06.002] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/12/2011] [Revised: 06/09/2011] [Accepted: 06/09/2011] [Indexed: 11/22/2022]
Abstract
Essentially nothing is known about the molecular underpinnings of crustacean circadian clocks. The genome of Daphnia pulex, the only crustacean genome available for public use, provides a unique resource for identifying putative circadian proteins in this species. Here, the Daphnia genome was mined for putative circadian protein genes using Drosophila melanogaster queries. The sequences of core clock (e.g. CLOCK, CYCLE, PERIOD, TIMELESS and CRYPTOCHROME 2), clock input (CRYPTOCHROME 1) and clock output (PIGMENT DISPERSING HORMONE RECEPTOR) proteins were deduced. Structural analyses and alignment of the Daphnia proteins with their Drosophila counterparts revealed extensive sequence conservation, particularly in functional domains. Comparisons of the Daphnia proteins with other sequences showed that they are, in most cases, more similar to homologs from other species, including vertebrates, than they are to those of Drosophila. The presence of both CRYPTOCHROME 1 and 2 in Daphnia suggests the organization of its clock may be more similar to that of the butterfly Danaus plexippus than to that of Drosophila (which possesses CRYPTOCHROME 1 but not CRYPTOCHROME 2). These data represent the first description of a putative circadian system from any crustacean, and provide a foundation for future molecular, anatomical and physiological investigations of circadian signaling in Daphnia.
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Pan Z, Wang J, Kang B, Lu L, Han C, Tang H, Li L, Xu F, Zhou Z, Lv J. Screening and identification of differentially expressed genes in goose hepatocytes exposed to free fatty acid. J Cell Biochem 2011; 111:1482-92. [PMID: 20872794 DOI: 10.1002/jcb.22878] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
The overaccumulation of triglycerides in hepatocytes induces hepatic steatosis; however, little is known about the mechanism of goose hepatic steatosis. The aim of this study was to define an experimental model of hepatocellular steatosis with TG overaccumulation and minimal cytotoxicity, using a mixture of various proportions of oleate and palmitate free fatty acids (FFAs) to induce fat-overloading, then using suppressive subtractive hybridization and a quantitative PCR approach to identify genes with higher or lower expression levels after the treatment of cells with FFA mixtures. Overall, 502 differentially expressed clones, representing 21 novel genes and 87 known genes, were detected by SSH. Based on functional clustering, up- and down-regulated genes were mostly related to carbohydrate and lipid metabolism, enzyme activity and signal transduction. The expression of 20 selected clones involved with carbohydrate and lipid metabolism pathways was further studied by quantitative PCR. The data indicated that six clones similar to the genes ChREBP, FoxO1, apoB, IHPK2, KIF1B, and FSP27, which participate in de novo synthesis of fatty acid and secretion of very low density lipoproteins, had significantly lower expression levels in the hepatocytes treated with FFA mixtures. Meanwhile, 13 clones similar to the genes DGAT-1, ACSL1, DHRS7, PPARα, L-FABP, DGAT-2, PCK, ACSL3, CPT-1, A-FABP, PPARβ, MAT, and ALDOB had significantly higher expression levels in the hepatocytes treated with FFA mixtures. These results suggest that several metabolic pathways are altered in goose hepatocytes, which may be useful for further research into the molecular mechanism of goose hepatic steatosis.
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Affiliation(s)
- Zhixiong Pan
- Key Laboratory of Animal Genetic Resources, College of Animal Science and Technology, Sichuan Agricultural University, Ya'an, Sichuan 625014, PR China
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21
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Simon JC, Stoeckel S, Tagu D. Evolutionary and functional insights into reproductive strategies of aphids. C R Biol 2010; 333:488-96. [DOI: 10.1016/j.crvi.2010.03.003] [Citation(s) in RCA: 41] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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Cortés T, Ortiz-Rivas B, Martínez-Torres D. Identification and characterization of circadian clock genes in the pea aphid Acyrthosiphon pisum. INSECT MOLECULAR BIOLOGY 2010; 19 Suppl 2:123-39. [PMID: 20482645 DOI: 10.1111/j.1365-2583.2009.00931.x] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
The molecular basis of circadian clocks is highly evolutionarily conserved and has been best characterized in Drosophila and mouse. Analysis of the Acyrthosiphon pisum genome revealed the presence of orthologs of the following genes constituting the core of the circadian clock in Drosophila: period (per), timeless (tim), Clock, cycle, vrille, and Pdp1. However, the presence in A. pisum of orthologs of a mammal-type in addition to a Drosophila-type cryptochrome places the putative aphid clockwork closer to the ancestral insect system than to the Drosophila one. Most notably, five of these putative aphid core clock genes are highly divergent and exhibit accelerated rates of change (especially per and tim orthologs) suggesting that the aphid circadian clock has evolved to adapt to (unknown) aphid-specific needs. Additionally, with the exception of jetlag (absent in the aphid) other genes included in the Drosophila circadian clock repertoire were found to be conserved in A. pisum. Expression analysis revealed circadian rhythmicity for some core genes as well as a significant effect of photoperiod in the amplitude of oscillations.
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Affiliation(s)
- T Cortés
- Institut Cavanilles de Biodiversitat i Biologia Evolutiva, Universitat de València, Spain
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Gallot A, Rispe C, Leterme N, Gauthier JP, Jaubert-Possamai S, Tagu D. Cuticular proteins and seasonal photoperiodism in aphids. INSECT BIOCHEMISTRY AND MOLECULAR BIOLOGY 2010; 40:235-240. [PMID: 20018241 DOI: 10.1016/j.ibmb.2009.12.001] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/13/2009] [Revised: 11/27/2009] [Accepted: 12/01/2009] [Indexed: 05/28/2023]
Abstract
For poikilotherm animals such as insects, extreme temperatures can be a severe issue in continental regions. Aphids, which reproduce in spring and summer by viviparity, are prone to death in hard winter conditions. These species exhibit reproductive plasticity adapted to winter by producing oviparous females in autumn, which lay overwintering eggs. This switch is driven by photoperiodism, and long nights are sufficient to trigger the change in reproductive mode. Global transcriptomic analyses applied to the pea aphid Acyrthosiphon pisum for which genomic resources are now available have allowed the identification of several genetic programs regulated by photoperiod shortening. Unexpectedly, one of these genetic programs concerns cuticle proteins and cuticle structure. This opens new tracks for investigations and poses new hypotheses on the link between cuticle modification and neuronal signalisation of photoperiod in aphids in response to seasonal photoperiodism. This review focuses on the description of cuticular protein genes in the pea aphid and their regulation during the change of reproductive mode.
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Affiliation(s)
- Aurore Gallot
- INRA, UMR BiO3P, BP 35327, 35653 Le Rheu cedex, France
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Differential gene expression profiling in the developed ovaries between the parthenogenetic and bisexual female rice water weevils, Lissorhoptrus oryzophilus Kuschel (Coleoptera: Curculionidae). ACTA ACUST UNITED AC 2009. [DOI: 10.1007/s11434-009-0537-0] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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25
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Le Trionnaire G, Francis F, Jaubert-Possamai S, Bonhomme J, De Pauw E, Gauthier JP, Haubruge E, Legeai F, Prunier-Leterme N, Simon JC, Tanguy S, Tagu D. Transcriptomic and proteomic analyses of seasonal photoperiodism in the pea aphid. BMC Genomics 2009; 10:456. [PMID: 19788735 PMCID: PMC2763885 DOI: 10.1186/1471-2164-10-456] [Citation(s) in RCA: 40] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2008] [Accepted: 09/29/2009] [Indexed: 12/04/2022] Open
Abstract
Background Aphid adaptation to harsh winter conditions is illustrated by an alternation of their reproductive mode. Aphids detect photoperiod shortening by sensing the length of the night and switch from viviparous parthenogenesis in spring and summer, to oviparous sexual reproduction in autumn. The photoperiodic signal is transduced from the head to the reproductive tract to change the fate of the future oocytes from mitotic diploid embryogenesis to haploid formation of gametes. This process takes place in three consecutive generations due to viviparous parthenogenesis. To understand the molecular basis of the switch in the reproductive mode, transcriptomic and proteomic approaches were used to detect significantly regulated transcripts and polypeptides in the heads of the pea aphid Acyrthosiphon pisum. Results The transcriptomic profiles of the heads of the first generation were slightly affected by photoperiod shortening. This suggests that trans-generation signalling between the grand-mothers and the viviparous embryos they contain is not essential. By analogy, many of the genes and some of the proteins regulated in the heads of the second generation are implicated in visual functions, photoreception and cuticle structure. The modification of the cuticle could be accompanied by a down-regulation of the N-β-alanyldopamine pathway and desclerotization. In Drosophila, modification of the insulin pathway could cause a decrease of juvenile hormones in short-day reared aphids. Conclusion This work led to the construction of hypotheses for photoperiodic regulation of the switch of the reproductive mode in aphids.
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Mateo Leach I, Hesseling A, Huibers WHC, Witsenboer H, Beukeboom LW, van de Zande L. Transcriptome and proteome analysis of ovaries of arrhenotokous and thelytokous Venturia canescens. INSECT MOLECULAR BIOLOGY 2009; 18:477-482. [PMID: 19453764 DOI: 10.1111/j.1365-2583.2009.00890.x] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
Under arrhenotoky, unfertilized haploid eggs develop as males but under thelytoky they develop into diploid females after they have undergone diploidy restoration. In the parasitoid wasp Venturia canescens both reproductive modes occur. Thelytoky is genetically determined but the underlying genetics of diploidy restoration remain unknown. In this study we aim to identify the genes and/or proteins that control thelytoky. cDNA-amplified fragment length polymorphism (cDNA-AFLP) analysis of total ovarian RNA and two-dimensional protein electrophoresis in combination with mass spectrometry revealed putative transcripts and proteins involved in arrhenotokous and thelytokous development. The detected tubulin and actin protein differences are most likely functionally related to the two types of reproduction.
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Affiliation(s)
- I Mateo Leach
- Evolutionary Genetics, Center for Ecological and Evolutionary Studies, University of Groningen, NL-9750 AA Haren, The Netherlands.
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