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Ludington WB. The importance of host physical niches for the stability of gut microbiome composition. Philos Trans R Soc Lond B Biol Sci 2024; 379:20230066. [PMID: 38497267 PMCID: PMC10945397 DOI: 10.1098/rstb.2023.0066] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2023] [Accepted: 12/04/2023] [Indexed: 03/19/2024] Open
Abstract
Gut bacteria are prevalent throughout the Metazoa and form complex microbial communities associated with food breakdown, nutrient provision and disease prevention. How hosts acquire and maintain a consistent bacterial flora remains mysterious even in the best-studied animals, including humans, mice, fishes, squid, bugs, worms and flies. This essay visits the evidence that hosts have co-evolved relationships with specific bacteria and that some of these relationships are supported by specialized physical niches that select, sequester and maintain microbial symbionts. Genetics approaches could uncover the mechanisms for recruiting and maintaining the stable and consistent members of the microbiome. This article is part of the theme issue 'Sculpting the microbiome: how host factors determine and respond to microbial colonization'.
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Affiliation(s)
- William B. Ludington
- Department of Biosphere Sciences and Engineering, Carnegie Institution for Science, Baltimore, MD 21218, USA
- Department of Biology, Johns Hopkins University, Baltimore, MD 21218, USA
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2
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Massey C, Nosker ME, Gale J, Scott S, Walker CJ, Cluff A, Wilcox S, Morrison A, Gottfredson Morgan SJ, Beltz J, Schmidt P, Chaston JM. Humidity determines penetrance of a latitudinal gradient in genetic selection on the microbiota by Drosophila melanogaster. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2024:2024.05.02.591907. [PMID: 38746372 PMCID: PMC11092659 DOI: 10.1101/2024.05.02.591907] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/16/2024]
Abstract
The fruit fly Drosophila melanogaster is a model for understanding how hosts and their microbial partners interact as the host adapts to wild environments. These interactions are readily interrogated because of the low taxonomic and numeric complexity of the flies' bacterial communities. Previous work has established that host genotype, the environment, diet, and interspecies microbial interactions can all influence host fitness and microbiota composition, but the specific processes and characters mediating these processes are incompletely understood. Here, we compared the variation in microbiota composition between wild-derived fly populations when flies could choose between the microorganisms in their diets and when flies were reared under environmental perturbation (different humidities). We also compared the colonization of the resident and transient microorganisms. We show that the ability to choose between microorganisms in the diet and the environmental condition of the flies can influence the relative abundance of the microbiota. There were also key differences in the abundances of the resident and transient microbiota. However, the microbiota only differed between populations when the flies were reared at humidities at or above 50% relative humidity. We also show that elevated humidity determined the penetrance of a gradient in host genetic selection on the microbiota that is associated with the latitude the flies were collected from. Finally, we show that the treatment-dependent variation in microbiota composition is associated with variation in host stress survival. Together, these findings emphasize that host genetic selection on the microbiota composition of a model animal host can be patterned with the source geography, and that such variation has the potential to influence their survival in the wild. Importance The fruit fly Drosophila melanogaster is a model for understanding how hosts and their microbial partners interact as hosts adapt in wild environments. Our understanding of what causes geographic variation in the fruit fly microbiota remains incomplete. Previous work has shown that the D. melanogaster microbiota has relatively low numerical and taxonomic complexity. Variation in the fly microbiota composition can be attributed to environmental characters and host genetic variation, and variation in microbiota composition can be patterned with the source location of the flies. In this work we explored three possible causes of patterned variation in microbiota composition. We show that host feeding choices, the host niche colonized by the bacteria, and a single environmental character can all contribute to variation in microbiota composition. We also show that penetrance of latitudinally-patterned host genetic selection is only observed at elevated humidities. Together, these results identify several factors that influence microbiota composition in wild fly genotypes and emphasize the interplay between environmental and host genetic factors in determining the microbiota composition of these model hosts.
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3
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Liu X, Yang M, Liu R, Zhou F, Zhu H, Wang X. The impact of Parkinson's disease-associated gut microbiota on the transcriptome in Drosophila. Microbiol Spectr 2023; 11:e0017623. [PMID: 37754772 PMCID: PMC10581176 DOI: 10.1128/spectrum.00176-23] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2023] [Accepted: 08/08/2023] [Indexed: 09/28/2023] Open
Abstract
Parkinson's disease (PD) is a common neurodegenerative disease in middle-aged and elderly people, and many studies have confirmed that the disorder of gut microbiota is involved in the pathophysiological process of PD. However, the molecular mechanism of gut microbiota in regulating the pathogenesis of PD is still lacking. In this study, to investigate the impact of PD-associated gut microbiota on host transcriptome, we established various PD models with fecal microbiota transplantation (FMT) in the model organism Drosophila followed by integrative data analysis of microbiome and transcriptome. We first constructed rotenone-induced PD models in Drosophila followed by FMT in different groups. Microbial analysis by 16S rDNA sequencing showed that gut microbiota from PD Drosophila could affect bacterial structure of normal Drosophila, and gut microbiota from normal Drosophila could affect bacterial structure of PD Drosophila. Transcriptome analysis revealed that PD-associated gut microbiota influenced expression patterns of genes enriched in neuroactive ligand-receptor interaction, lysosome, and diverse metabolic pathways. Importantly, to verify our findings, we transplanted Drosophila with fecal samples from clinical PD patients. Compared to the control, Drosophila transplanted with fecal samples from PD patients had reduced microbiota Acetobacter and Lactobacillus, and differentially expressed genes enriched in diverse metabolic pathways. In summary, our results reveal the influence of PD-associated gut microbiota on host gene expression, and this study can help better understand the link between gut microbiota and PD pathogenesis through gut-brain axis. IMPORTANCE Gut microbiota plays important roles in regulating host gene expression and physiology through complex mechanisms. Recently, it has been suggested that disorder of gut microbiota is involved in the pathophysiological process of Parkinson's disease (PD). However, the molecular mechanism of gut microbiota in regulating the pathogenesis of PD is still lacking. In this study, to investigate the impact of PD-associated gut microbiota on host transcriptome, we established various PD models with fecal microbiota transplantation in the model organism Drosophila followed by integrative data analysis of microbiome and transcriptome. We also verified our findings by transplanting Drosophila with fecal samples from clinical PD patients. Our results demonstrated that PD-associated gut microbiota can induce differentially expressed genes enriched in diverse metabolic pathways. This study can help better understand the link between gut microbiota and PD pathogenesis through gut-brain axis.
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Affiliation(s)
- Xin Liu
- South China Normal University-Panyu Central Hospital Joint Laboratory of Translational Medical Research, Guangzhou Panyu Central Hospital, Guangzhou, China
- Guangdong Provincial Key Laboratory of Insect Developmental Biology and Applied Technology, School of Life Sciences, South China Normal University, Guangzhou, China
| | - Meng Yang
- Guangdong Provincial Key Laboratory of Insect Developmental Biology and Applied Technology, School of Life Sciences, South China Normal University, Guangzhou, China
| | - Runzhou Liu
- Guangdong Provincial Key Laboratory of Insect Developmental Biology and Applied Technology, School of Life Sciences, South China Normal University, Guangzhou, China
| | - Fan Zhou
- Guangdong Provincial Key Laboratory of Insect Developmental Biology and Applied Technology, School of Life Sciences, South China Normal University, Guangzhou, China
| | - Haibing Zhu
- South China Normal University-Panyu Central Hospital Joint Laboratory of Translational Medical Research, Guangzhou Panyu Central Hospital, Guangzhou, China
- Department of Psychiatry, Guangzhou Panyu Central Hospital, Guangzhou, China
| | - Xiaoyun Wang
- South China Normal University-Panyu Central Hospital Joint Laboratory of Translational Medical Research, Guangzhou Panyu Central Hospital, Guangzhou, China
- Guangdong Provincial Key Laboratory of Insect Developmental Biology and Applied Technology, School of Life Sciences, South China Normal University, Guangzhou, China
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4
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Santos J, Matos M, Flatt T, Chelo IM. Microbes are potential key players in the evolution of life histories and aging in Caenorhabditis elegans. Ecol Evol 2023; 13:e10537. [PMID: 37753311 PMCID: PMC10518755 DOI: 10.1002/ece3.10537] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2023] [Revised: 08/07/2023] [Accepted: 09/01/2023] [Indexed: 09/28/2023] Open
Abstract
Microbes can have profound effects on host fitness and health and the appearance of late-onset diseases. Host-microbe interactions thus represent a major environmental context for healthy aging of the host and might also mediate trade-offs between life-history traits in the evolution of host senescence. Here, we have used the nematode Caenorhabditis elegans to study how host-microbe interactions may modulate the evolution of life histories and aging. We first characterized the effects of two non-pathogenic and one pathogenic Escherichia coli strains, together with the pathogenic Serratia marcescens DB11 strain, on population growth rates and survival of C. elegans from five different genetic backgrounds. We then focused on an outbred C. elegans population, to understand if microbe-specific effects on the reproductive schedule and in traits such as developmental rate and survival were also expressed in the presence of males and standing genetic variation, which could be relevant for the evolution of C. elegans and other nematode species in nature. Our results show that host-microbe interactions have a substantial host-genotype-dependent impact on the reproductive aging and survival of the nematode host. Although both pathogenic bacteria reduced host survival in comparison with benign strains, they differed in how they affected other host traits. Host fertility and population growth rate were affected by S. marcescens DB11 only during early adulthood, whereas this occurred at later ages with the pathogenic E. coli IAI1. In both cases, these effects were largely dependent on the host genotypes. Given such microbe-specific genotypic differences in host life history, we predict that the evolution of reproductive schedules and senescence might be critically contingent on host-microbe interactions in nature.
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Affiliation(s)
- Josiane Santos
- cE3c – Centre for Ecology, Evolution and Environmental Changes & CHANGE – Global Change and Sustainability InstituteLisboaPortugal
- Departamento de Biologia Animal, Faculdade de CiênciasUniversidade de LisboaLisboaPortugal
| | - Margarida Matos
- cE3c – Centre for Ecology, Evolution and Environmental Changes & CHANGE – Global Change and Sustainability InstituteLisboaPortugal
- Departamento de Biologia Animal, Faculdade de CiênciasUniversidade de LisboaLisboaPortugal
| | - Thomas Flatt
- Department of BiologyUniversity of FribourgFribourgSwitzerland
| | - Ivo M. Chelo
- cE3c – Centre for Ecology, Evolution and Environmental Changes & CHANGE – Global Change and Sustainability InstituteLisboaPortugal
- Departamento de Biologia Animal, Faculdade de CiênciasUniversidade de LisboaLisboaPortugal
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Téfit MA, Budiman T, Dupriest A, Yew JY. Environmental microbes promote phenotypic plasticity in reproduction and sleep behaviour. Mol Ecol 2023; 32:5186-5200. [PMID: 37577956 PMCID: PMC10544802 DOI: 10.1111/mec.17095] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/26/2022] [Revised: 06/13/2023] [Accepted: 07/25/2023] [Indexed: 08/15/2023]
Abstract
The microbiome has been hypothesized as a driving force of phenotypic variation in host organisms that is capable of extending metabolic processes, altering development and in some cases, conferring novel functions that are critical for survival. Only a few studies have directly shown a causal role for the environmental microbiome in altering host phenotypic features. To assess the extent to which environmental microbes induce variation in host life-history traits and behaviour, we inoculated axenic Drosophila melanogaster with microbes isolated from drosophilid populations collected from two different field sites and generated two populations with distinct bacterial and fungal profiles. We show that microbes isolated from environmental sites with modest abiotic differences induce large variation in host reproduction, fatty acid levels, stress tolerance and sleep behaviour. Importantly, clearing microbes from each experimental population removed the phenotypic differences. The results support the causal role of environmental microbes as drivers of host phenotypic plasticity and potentially, rapid adaptation and evolution.
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Affiliation(s)
- Mélisandre A Téfit
- School of Ocean and Earth Science and Technology, Pacific Biosciences Research Center, University of Hawai'i at Mānoa, Honolulu, Hawaii, USA
| | - Tifanny Budiman
- School of Ocean and Earth Science and Technology, Pacific Biosciences Research Center, University of Hawai'i at Mānoa, Honolulu, Hawaii, USA
| | - Adrianna Dupriest
- School of Ocean and Earth Science and Technology, Pacific Biosciences Research Center, University of Hawai'i at Mānoa, Honolulu, Hawaii, USA
| | - Joanne Y Yew
- School of Ocean and Earth Science and Technology, Pacific Biosciences Research Center, University of Hawai'i at Mānoa, Honolulu, Hawaii, USA
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6
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Tabbabi A, Mizushima D, Yamamoto DS, Kato H. Effects of host species on microbiota composition in Phlebotomus and Lutzomyia sand flies. Parasit Vectors 2023; 16:310. [PMID: 37653518 PMCID: PMC10472604 DOI: 10.1186/s13071-023-05939-2] [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: 05/24/2023] [Accepted: 08/21/2023] [Indexed: 09/02/2023] Open
Abstract
BACKGROUND Blood-sucking phlebotomine sand flies are vectors of the protozoan parasites Leishmania spp. Although the intestinal microbiota is involved in a wide range of biological and physiological processes and has the potential to alter vector competence, little is known about the factors that modify the gut microbiota composition of sand flies. As a key step toward addressing this issue, we investigated the impact of host species on the gut bacterial composition in Phlebotomus and Lutzomyia sand flies reared under the same conditions. METHODS Bacterial 16S rRNA gene amplification and Illumina MiSeq sequencing were used to characterize the overall bacterial composition of three laboratory-reared sandflies: Phlebotomus papatasi, Ph. duboscqi, and Lutzomyia longipalpis. RESULTS Our results showed that the larvae of the three sand fly species harbored almost the same microbes but had different relative abundances. Adult Ph. papatasi and Ph. duboscqi revealed similar microbiome compositions, which were distinct from that of adult Lu. longipalpis. Furthermore, we showed that Ph. papatasi and Ph. duboscqi are hosts for different bacterial genera. The experiment was repeated twice to improve accuracy and increase reliability of the data, and the same results were obtained even when a distinct composition of the microbiome among the same species was identified probably because of the use of different larvae food batch. CONCLUSIONS The present study provides key insights into the role of host species in the gut microbial content of different sand fly species reared under the same conditions, which may influence their susceptibility to Leishmania infection.
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Affiliation(s)
- Ahmed Tabbabi
- Division of Medical Zoology, Department of Infection and Immunity, Jichi Medical University, Shimotsuke, Tochigi, 329-0498, Japan
| | - Daiki Mizushima
- Division of Medical Zoology, Department of Infection and Immunity, Jichi Medical University, Shimotsuke, Tochigi, 329-0498, Japan
| | - Daisuke S Yamamoto
- Division of Medical Zoology, Department of Infection and Immunity, Jichi Medical University, Shimotsuke, Tochigi, 329-0498, Japan
| | - Hirotomo Kato
- Division of Medical Zoology, Department of Infection and Immunity, Jichi Medical University, Shimotsuke, Tochigi, 329-0498, Japan.
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7
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Bapteste E, Huneman P, Keller L, Teulière J, Lopez P, Teeling EC, Lindner AB, Baudisch A, Ludington WB, Franceschi C. Expanding evolutionary theories of ageing to better account for symbioses and interactions throughout the Web of Life. Ageing Res Rev 2023; 89:101982. [PMID: 37321383 PMCID: PMC10771319 DOI: 10.1016/j.arr.2023.101982] [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: 04/14/2023] [Revised: 05/26/2023] [Accepted: 06/11/2023] [Indexed: 06/17/2023]
Abstract
How, when, and why organisms age are fascinating issues that can only be fully addressed by adopting an evolutionary perspective. Consistently, the main evolutionary theories of ageing, namely the Mutation Accumulation theory, the Antagonistic Pleiotropy theory, and the Disposable Soma theory, have formulated stimulating hypotheses that structure current debates on both the proximal and ultimate causes of organismal ageing. However, all these theories leave a common area of biology relatively under-explored. The Mutation Accumulation theory and the Antagonistic Pleiotropy theory were developed under the traditional framework of population genetics, and therefore are logically centred on the ageing of individuals within a population. The Disposable Soma theory, based on principles of optimising physiology, mainly explains ageing within a species. Consequently, current leading evolutionary theories of ageing do not explicitly model the countless interspecific and ecological interactions, such as symbioses and host-microbiomes associations, increasingly recognized to shape organismal evolution across the Web of Life. Moreover, the development of network modelling supporting a deeper understanding on the molecular interactions associated with ageing within and between organisms is also bringing forward new questions regarding how and why molecular pathways associated with ageing evolved. Here, we take an evolutionary perspective to examine the effects of organismal interactions on ageing across different levels of biological organisation, and consider the impact of surrounding and nested systems on organismal ageing. We also apply this perspective to suggest open issues with potential to expand the standard evolutionary theories of ageing.
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Affiliation(s)
- Eric Bapteste
- Institut de Systématique, Evolution, Biodiversité (ISYEB), Sorbonne Université, CNRS, Museum National d'Histoire Naturelle, EPHE, Université des Antilles, Paris, France.
| | - Philippe Huneman
- Institut d'Histoire et de Philosophie des Sciences et des Techniques (CNRS/ Université Paris I Sorbonne), Paris, France
| | - Laurent Keller
- Department of Ecology and Evolution, University of Lausanne, 1015 Lausanne, Switzerland
| | - Jérôme Teulière
- Institut de Systématique, Evolution, Biodiversité (ISYEB), Sorbonne Université, CNRS, Museum National d'Histoire Naturelle, EPHE, Université des Antilles, Paris, France
| | - Philippe Lopez
- Institut de Systématique, Evolution, Biodiversité (ISYEB), Sorbonne Université, CNRS, Museum National d'Histoire Naturelle, EPHE, Université des Antilles, Paris, France
| | - Emma C Teeling
- School of Biology and Environmental Science, University College Dublin, Ireland
| | - Ariel B Lindner
- Université de Paris, INSERM U1284, Center for Research and Interdisciplinarity (CRI), Paris, France
| | - Annette Baudisch
- Interdisciplinary Centre on Population Dynamics, University of Southern Denmark, 5230 Odense M, Denmark
| | - William B Ludington
- Department of Embryology, Carnegie Institution for Science, Baltimore, MD 21218, USA; Department of Biology, Johns Hopkins University, Baltimore, MD 21218, USA
| | - Claudio Franceschi
- Department of Medical and Surgical Sciences, Alma Mater Studiorum University of Bologna, 40138 Bologna, Italy; Department of Applied Mathematics and Laboratory of Systems Medicine of Aging, Lobachevsky University, Nizhny Novgorod 603950, Russia
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8
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Medeiros MJ, Seo L, Macias A, Price DK, Yew JY. Bacterial and fungal components of the gut microbiome have distinct, sex-specific roles in Hawaiian Drosophila reproduction. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2023:2023.07.14.549088. [PMID: 37503295 PMCID: PMC10370118 DOI: 10.1101/2023.07.14.549088] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 07/29/2023]
Abstract
Gut microbiomes provide numerous physiological benefits for host animals. The role of bacterial members of microbiomes in host physiology is well-documented. However, much less is known about the contributions and interactions of fungal members of the microbiome even though fungi are significant components of many microbiomes, including those of humans and insects. Here, we used antibacterial and antifungal drugs to manipulate the gut microbiome of a Hawaiian picture-wing Drosophila species, D. grimshawi, and identified distinct, sex-specific roles for the bacteria and fungi in microbiome community stability and reproduction. Female oogenesis, fecundity and mating drive were significantly diminished when fungal communities were suppressed. By contrast, male fecundity was more strongly affected by bacterial but not fungal populations. For males and females, suppression of both bacteria and fungi severely reduced fecundity and altered fatty acid levels and composition, implicating the importance of interkingdom interactions on reproduction and lipid metabolism. Overall, our results reveal that bacteria and fungi have distinct, sexually-dimorphic effects on host physiology and interkingdom dynamics in the gut help to maintain microbiome community stability and enhance reproduction.
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Affiliation(s)
- Matthew J. Medeiros
- Pacific Biosciences Research Center, University of Hawaiʻi at Mānoa
- Department of Life Sciences, University of Nevada at Las Vegas
| | - Laura Seo
- Department of Life Sciences, University of Nevada at Las Vegas
| | - Aziel Macias
- Department of Life Sciences, University of Nevada at Las Vegas
| | - Donald K. Price
- Department of Life Sciences, University of Nevada at Las Vegas
| | - Joanne Y. Yew
- Pacific Biosciences Research Center, University of Hawaiʻi at Mānoa
- Department of Life Sciences, University of Nevada at Las Vegas
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9
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Alemany I, Pérez-Cembranos A, Pérez-Mellado V, Castro JA, Picornell A, Ramon C, Jurado-Rivera JA. Faecal Microbiota Divergence in Allopatric Populations of Podarcis lilfordi and P. pityusensis, Two Lizard Species Endemic to the Balearic Islands. MICROBIAL ECOLOGY 2023; 85:1564-1577. [PMID: 35482107 PMCID: PMC10167182 DOI: 10.1007/s00248-022-02019-3] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/27/2021] [Accepted: 04/19/2022] [Indexed: 05/10/2023]
Abstract
Gut microbial communities provide essential functions to their hosts and are known to influence both their ecology and evolution. However, our knowledge of these complex associations is still very limited in reptiles. Here we report the 16S rRNA gene faecal microbiota profiles of two lizard species endemic to the Balearic archipelago (Podarcis lilfordi and P. pityusensis), encompassing their allopatric range of distribution through a noninvasive sampling, as an alternative to previous studies that implied killing specimens of these IUCN endangered and near-threatened species, respectively. Both lizard species showed a faecal microbiome composition consistent with their omnivorous trophic ecology, with a high representation of cellulolytic bacteria taxa. We also identified species-specific core microbiota signatures and retrieved lizard species, islet ascription, and seasonality as the main factors in explaining bacterial community composition. The different Balearic Podarcis populations are characterised by harbouring a high proportion of unique bacterial taxa, thus reinforcing their view as unique and divergent evolutionary entities.
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Affiliation(s)
- Iris Alemany
- Department of Biology, University of the Balearic Islands, Ctra., Valldemossa km 7'5, 07122, Palma, Balearic Islands, Spain
| | | | | | - José A Castro
- Department of Biology, University of the Balearic Islands, Ctra., Valldemossa km 7'5, 07122, Palma, Balearic Islands, Spain
| | - Antonia Picornell
- Department of Biology, University of the Balearic Islands, Ctra., Valldemossa km 7'5, 07122, Palma, Balearic Islands, Spain
| | - Cori Ramon
- Department of Biology, University of the Balearic Islands, Ctra., Valldemossa km 7'5, 07122, Palma, Balearic Islands, Spain
| | - José A Jurado-Rivera
- Department of Biology, University of the Balearic Islands, Ctra., Valldemossa km 7'5, 07122, Palma, Balearic Islands, Spain.
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Dodge R, Jones EW, Zhu H, Obadia B, Martinez DJ, Wang C, Aranda-Díaz A, Aumiller K, Liu Z, Voltolini M, Brodie EL, Huang KC, Carlson JM, Sivak DA, Spradling AC, Ludington WB. A symbiotic physical niche in Drosophila melanogaster regulates stable association of a multi-species gut microbiota. Nat Commun 2023; 14:1557. [PMID: 36944617 PMCID: PMC10030875 DOI: 10.1038/s41467-023-36942-x] [Citation(s) in RCA: 7] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2022] [Accepted: 02/22/2023] [Indexed: 03/23/2023] Open
Abstract
The gut is continuously invaded by diverse bacteria from the diet and the environment, yet microbiome composition is relatively stable over time for host species ranging from mammals to insects, suggesting host-specific factors may selectively maintain key species of bacteria. To investigate host specificity, we used gnotobiotic Drosophila, microbial pulse-chase protocols, and microscopy to investigate the stability of different strains of bacteria in the fly gut. We show that a host-constructed physical niche in the foregut selectively binds bacteria with strain-level specificity, stabilizing their colonization. Primary colonizers saturate the niche and exclude secondary colonizers of the same strain, but initial colonization by Lactobacillus species physically remodels the niche through production of a glycan-rich secretion to favor secondary colonization by unrelated commensals in the Acetobacter genus. Our results provide a mechanistic framework for understanding the establishment and stability of a multi-species intestinal microbiome.
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Affiliation(s)
- Ren Dodge
- Department of Embryology, Carnegie Institution for Science, Baltimore, MD, 21218, USA
| | - Eric W Jones
- Department of Physics, Simon Fraser University, Burnaby, BC, V5A 1S6, Canada
- Department of Physics, University of California, Santa Barbara, CA, 93106, USA
| | - Haolong Zhu
- Department of Embryology, Carnegie Institution for Science, Baltimore, MD, 21218, USA
- Department of Biology, Johns Hopkins University, Baltimore, MD, 21218, USA
| | - Benjamin Obadia
- Molecular and Cell Biology Department, University of California, Berkeley, CA, 94720, USA
| | - Daniel J Martinez
- Department of Embryology, Carnegie Institution for Science, Baltimore, MD, 21218, USA
| | - Chenhui Wang
- Department of Embryology, Carnegie Institution for Science, Baltimore, MD, 21218, USA
- Howard Hughes Medical Institute, Baltimore, MD, 21218, USA
| | - Andrés Aranda-Díaz
- Department of Bioengineering, Stanford University, Stanford, CA, 94305, USA
| | - Kevin Aumiller
- Department of Embryology, Carnegie Institution for Science, Baltimore, MD, 21218, USA
- Department of Biology, Johns Hopkins University, Baltimore, MD, 21218, USA
| | - Zhexian Liu
- Department of Biology, Johns Hopkins University, Baltimore, MD, 21218, USA
| | - Marco Voltolini
- Lawrence Berkeley National Lab, Berkeley, CA, 94720, USA
- Dipartimento di Scienze della Terra, Università degli Studi di Milano, Milano, Italy
| | - Eoin L Brodie
- Lawrence Berkeley National Lab, Berkeley, CA, 94720, USA
| | - Kerwyn Casey Huang
- Department of Bioengineering, Stanford University, Stanford, CA, 94305, USA
- Department of Microbiology and Immunology, Stanford University School of Medicine, Stanford, CA, 94305, USA
- Chan Zuckerberg Biohub, San Francisco, CA, 94158, USA
| | - Jean M Carlson
- Department of Physics, University of California, Santa Barbara, CA, 93106, USA
| | - David A Sivak
- Department of Physics, Simon Fraser University, Burnaby, BC, V5A 1S6, Canada
| | - Allan C Spradling
- Department of Embryology, Carnegie Institution for Science, Baltimore, MD, 21218, USA
- Department of Biology, Johns Hopkins University, Baltimore, MD, 21218, USA
- Howard Hughes Medical Institute, Baltimore, MD, 21218, USA
| | - William B Ludington
- Department of Embryology, Carnegie Institution for Science, Baltimore, MD, 21218, USA.
- Department of Biology, Johns Hopkins University, Baltimore, MD, 21218, USA.
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11
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Ma Y, He J, Sieber M, von Frieling J, Bruchhaus I, Baines JF, Bickmeyer U, Roeder T. The microbiome of the marine flatworm Macrostomum lignano provides fitness advantages and exhibits circadian rhythmicity. Commun Biol 2023; 6:289. [PMID: 36934156 PMCID: PMC10024726 DOI: 10.1038/s42003-023-04671-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2022] [Accepted: 03/07/2023] [Indexed: 03/20/2023] Open
Abstract
The close association between animals and their associated microbiota is usually beneficial for both partners. Here, we used a simple marine model invertebrate, the flatworm Macrostomum lignano, to characterize the host-microbiota interaction in detail. This analysis revealed that the different developmental stages each harbor a specific microbiota. Studies with gnotobiotic animals clarified the physiological significance of the microbiota. While no fitness benefits were mediated by the microbiota when food was freely available, animals with microbiota showed significantly increased fitness with a reduced food supply. The microbiota of M. lignano shows circadian rhythmicity, affecting both the total bacterial load and the behavior of specific taxa. Moreover, the presence of the worm influences the composition of the bacterial consortia in the environment. In summary, the Macrostomum-microbiota system described here can serve as a general model for host-microbe interactions in marine invertebrates.
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Affiliation(s)
- Yuanyuan Ma
- Kiel University, Zoological Institute, Molecular Physiology, Kiel, Germany
| | - Jinru He
- Kiel University, Zoological Institute, Cell and Developmental Biology, Kiel, Germany
| | - Michael Sieber
- Max-Planck Institute for Evolutionary Biology, Dept. Evolutionary Theory, Plön, Germany
| | - Jakob von Frieling
- Kiel University, Zoological Institute, Molecular Physiology, Kiel, Germany
| | - Iris Bruchhaus
- Bernhard-Nocht Institute for Tropical Medicine, Hamburg, Germany
| | - John F Baines
- Kiel University, Medical Faculty, Institute for Experimental Medicine, Kiel, Germany
- Max-Planck Institute for Evolutionary Biology, Group Evolutionary Medicine, Plön, Germany
| | - Ulf Bickmeyer
- Alfred-Wegener-Institute, Biosciences, Ecological Chemistry, Bremerhaven, Germany
| | - Thomas Roeder
- Kiel University, Zoological Institute, Molecular Physiology, Kiel, Germany.
- German Center for Lung Research (DZL), Airway Research Center North, Kiel, Germany.
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12
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Neha SA, Salazar-Bravo J. Fine-scale spatial variation shape fecal microbiome diversity and composition in black-tailed prairie dogs (Cynomys ludovicianus). BMC Microbiol 2023; 23:51. [PMID: 36858951 PMCID: PMC9979494 DOI: 10.1186/s12866-023-02778-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2022] [Accepted: 01/19/2023] [Indexed: 03/03/2023] Open
Abstract
BACKGROUND Host associated gut microbiota are important in understanding the coevolution of host-microbe, and how they may help wildlife populations to adapt to rapid environmental changes. Mammalian gut microbiota composition and diversity may be affected by a variety of factors including geographic variation, seasonal variation in diet, habitat disturbance, environmental conditions, age, and sex. However, there have been few studies that examined how ecological and environmental factors influence gut microbiota composition in animals' natural environments. In this study, we explore how host habitat, geographical location and environmental factors affect the fecal microbiota of Cynomys ludovicianus at a small spatial scale. We collected fecal samples from five geographically distinct locations in the Texas Panhandle classified as urban and rural areas and analyzed them using high throughput 16S rRNA gene amplicon sequencing. RESULTS The results showed that microbiota of these fecal samples was largely dominated by the phylum Bacteroidetes. Fecal microbiome diversity and composition differed significantly across sampling sites and habitats. Prairie dogs inhabiting urban areas showed reduced fecal diversity due to more homogenous environment and, likely, anthropogenic disturbance. Urban prairie dog colonies displayed greater phylogenetic variation among replicates than those in rural habitats. Differentially abundant analysis revealed that bacterial species pathogenic to humans and animals were highly abundant in urban areas which indicates that host health and fitness might be negatively affected. Random forest models identified Alistipes shahii as the important species driving the changes in fecal microbiome composition. Despite the effects of habitat and geographic location of host, we found a strong correlation with environmental factors and that- average maximum temperature was the best predictor of prairie dog fecal microbial diversity. CONCLUSIONS Our findings suggest that reduction in alpha diversity in conjunction with greater dispersion in beta diversity could be indicative of declining host health in urban areas; this information may, in turn, help determine future conservation efforts. Moreover, several bacterial species pathogenic to humans and other animals were enriched in prairie dog colonies near urban areas, which may in turn adversely affect host phenotype and fitness.
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Affiliation(s)
- Sufia Akter Neha
- International Center for Arid and Semi-Arid Land Studies, Texas Tech University, Lubbock, TX, 79409, USA. .,Department of Biological Sciences, Texas Tech University, Lubbock, 79409, USA.
| | - Jorge Salazar-Bravo
- International Center for Arid and Semi-Arid Land Studies, Texas Tech University, Lubbock, TX, 79409, USA.,Department of Biological Sciences, Texas Tech University, Lubbock, 79409, USA
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13
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Theys C, Verheyen J, Delnat V, Janssens L, Tüzün N, Stoks R. Thermal and latitudinal patterns in pace-of-life traits are partly mediated by the gut microbiome. THE SCIENCE OF THE TOTAL ENVIRONMENT 2023; 855:158829. [PMID: 36116637 DOI: 10.1016/j.scitotenv.2022.158829] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/17/2022] [Revised: 08/16/2022] [Accepted: 09/13/2022] [Indexed: 06/15/2023]
Abstract
The integration of life-history, physiological and behavioural traits into the pace-of-life generates a powerful framework to understand trait variation in nature both along environmental gradients and in response to environmental stressors. While the gut microbiome has been hypothesized as a candidate mechanism to underlie differentiation in the pace-of-life, this has been rarely studied. We investigated the role of the gut microbiome in contributing to the differentiation in pace-of-life and in thermal adaptation between populations of Ischnura elegans damselfly larvae inhabiting warmer low latitudes and colder high latitudes. We carried out a common-garden experiment, whereby we manipulated the exposure of the damselfly larvae to two key global warming factors: 4 °C warming and a 30 °C heat wave. Comparing the bacterial composition of the food source and the bacterioplankton indicated that damselfly larvae differentially take up bacteria from the surrounding environment and have a resident and functionally relevant microbiome. The gut microbiome differed between larvae of both latitudes, and this was associated with the host's latitudinal differentiation in activity, a key pace-of-life trait. Under heat wave exposure, the gut microbial community composition of high-latitude larvae converged towards that of the low-latitude larvae, with an increase in bacteria that likely are important in providing energy to cope with the heat wave. This suggests an adaptive latitude-specific shift in the gut microbiota matching the better ability of low-latitude hosts to deal with heat extremes. In general, our study provides evidence for the gut microbiome contributing to latitudinal differentiation in both the pace-of-life and in heat adaptation in natural populations.
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Affiliation(s)
- Charlotte Theys
- Laboratory of Evolutionary Stress Ecology and Ecotoxicology, University of Leuven, Charles Deberiotstraat 32, B-3000 Leuven, Belgium.
| | - Julie Verheyen
- Laboratory of Evolutionary Stress Ecology and Ecotoxicology, University of Leuven, Charles Deberiotstraat 32, B-3000 Leuven, Belgium
| | - Vienna Delnat
- Laboratory of Evolutionary Stress Ecology and Ecotoxicology, University of Leuven, Charles Deberiotstraat 32, B-3000 Leuven, Belgium
| | - Lizanne Janssens
- Laboratory of Evolutionary Stress Ecology and Ecotoxicology, University of Leuven, Charles Deberiotstraat 32, B-3000 Leuven, Belgium
| | - Nedim Tüzün
- Laboratory of Evolutionary Stress Ecology and Ecotoxicology, University of Leuven, Charles Deberiotstraat 32, B-3000 Leuven, Belgium; Department of Evolutionary and Integrative Ecology, Leibniz Institute of Freshwater Ecology and Inland Fisheries (IGB), Müggelseedamm 301, 12587 Berlin, Germany
| | - Robby Stoks
- Laboratory of Evolutionary Stress Ecology and Ecotoxicology, University of Leuven, Charles Deberiotstraat 32, B-3000 Leuven, Belgium
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14
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Juottonen H, Moghadam NN, Murphy L, Mappes J, Galarza JA. Host's genetic background determines the outcome of reciprocal faecal transplantation on life-history traits and microbiome composition. Anim Microbiome 2022; 4:67. [PMID: 36564793 PMCID: PMC9789590 DOI: 10.1186/s42523-022-00210-y] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2022] [Accepted: 11/09/2022] [Indexed: 12/24/2022] Open
Abstract
BACKGROUND Microbes play a role in their host's fundamental ecological, chemical, and physiological processes. Host life-history traits from defence to growth are therefore determined not only by the abiotic environment and genotype but also by microbiota composition. However, the relative importance and interactive effects of these factors may vary between organisms. Such connections remain particularly elusive in Lepidoptera, which have been argued to lack a permanent microbiome and have microbiota primarily determined by their diet and environment. We tested the microbiome specificity and its influence on life-history traits of two colour genotypes of the wood tiger moth (Arctia plantaginis) that differ in several traits, including growth. All individuals were grown in the laboratory for several generations with standardized conditions. We analyzed the bacterial community of the genotypes before and after a reciprocal frass (i.e., larval faeces) transplantation and followed growth rate, pupal mass, and the production of defensive secretion. RESULTS After transplantation, the fast-growing genotype grew significantly slower compared to the controls, but the slow-growing genotype did not change its growth rate. The frass transplant also increased the volume of defensive secretions in the fast-growing genotype but did not affect pupal mass. Overall, the fast-growing genotype appeared more susceptible to the transplantation than the slow-growing genotype. Microbiome differences between the genotypes strongly suggest genotype-based selective filtering of bacteria from the diet and environment. A novel cluster of insect-associated Erysipelotrichaceae was exclusive to the fast-growing genotype, and specific Enterococcaceae were characteristic to the slow-growing genotype. These Enterococcaceae became more prevalent in the fast-growing genotype after the transplant, which suggests that a slower growth rate is potentially related to their presence. CONCLUSIONS We show that reciprocal frass transplantation can reverse some genotype-specific life-history traits in a lepidopteran host. The results indicate that genotype-specific selective filtering can fine-tune the bacterial community at specific life stages and tissues like the larval frass, even against a background of a highly variable community with stochastic assembly. Altogether, our findings suggest that the host's genotype can influence its susceptibility to being colonized by microbiota, impacting key life-history traits.
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Affiliation(s)
- Heli Juottonen
- grid.9681.60000 0001 1013 7965Department of Biological and Environmental Sciences, University of Jyväskylä, P.O. Box 35, 40014 Jyväskylä, Finland
| | - Neda N. Moghadam
- grid.9681.60000 0001 1013 7965Department of Biological and Environmental Sciences, University of Jyväskylä, P.O. Box 35, 40014 Jyväskylä, Finland
| | - Liam Murphy
- grid.9681.60000 0001 1013 7965Department of Biological and Environmental Sciences, University of Jyväskylä, P.O. Box 35, 40014 Jyväskylä, Finland
| | - Johanna Mappes
- grid.9681.60000 0001 1013 7965Department of Biological and Environmental Sciences, University of Jyväskylä, P.O. Box 35, 40014 Jyväskylä, Finland ,grid.7737.40000 0004 0410 2071Organismal and Evolutionary Biology Research Program, Faculty of Biological and Environmental Sciences, University of Helsinki, Viikki Biocenter 3, 00014 Helsinki, Finland
| | - Juan A. Galarza
- grid.9681.60000 0001 1013 7965Department of Biological and Environmental Sciences, University of Jyväskylä, P.O. Box 35, 40014 Jyväskylä, Finland ,grid.7737.40000 0004 0410 2071Organismal and Evolutionary Biology Research Program, Faculty of Biological and Environmental Sciences, University of Helsinki, Viikki Biocenter 3, 00014 Helsinki, Finland
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15
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Henry LP, Ayroles JF. Drosophila melanogaster microbiome is shaped by strict filtering and neutrality along a latitudinal cline. Mol Ecol 2022; 31:5861-5871. [PMID: 36094780 PMCID: PMC9643648 DOI: 10.1111/mec.16692] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2022] [Revised: 08/30/2022] [Accepted: 09/07/2022] [Indexed: 01/13/2023]
Abstract
Microbiomes affect many aspects of host biology, but the eco-evolutionary forces that shape their diversity in natural populations remain poorly understood. Geographical gradients, such as latitudinal clines, generate predictable patterns in biodiversity at macroecological scales, but whether these macroscale processes apply to host-microbiome interactions is an open question. To address this question, we sampled the microbiomes of 13 natural populations of Drosophila melanogaster along a latitudinal cline in the eastern United States. The microbiomes were surprisingly consistent across the cline, as latitude did not predict either alpha or beta diversity. Only a narrow taxonomic range of bacteria were present in all microbiomes, indicating that strict taxonomic filtering by the host and neutral ecological dynamics are the primary factors shaping the fly microbiome. Our findings reveal the complexity of eco-evolutionary interactions shaping microbial variation in D. melanogaster and highlight the need for additional sampling of the microbiomes in natural populations along environmental gradients.
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Affiliation(s)
- Lucas P Henry
- Department of Ecology and Evolutionary Biology, Princeton University, Princeton, New Jersey, USA
- Lewis-Sigler Institute for Integrative Genomics, Princeton University, Princeton, New Jersey, USA
| | - Julien F Ayroles
- Department of Ecology and Evolutionary Biology, Princeton University, Princeton, New Jersey, USA
- Lewis-Sigler Institute for Integrative Genomics, Princeton University, Princeton, New Jersey, USA
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16
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Aagaard A, Liu S, Tregenza T, Braad Lund M, Schramm A, Verhoeven KJF, Bechsgaard J, Bilde T. Adapting to climate with limited genetic diversity: Nucleotide, DNA methylation and microbiome variation among populations of the social spider Stegodyphus dumicola. Mol Ecol 2022; 31:5765-5783. [PMID: 36112081 PMCID: PMC9827990 DOI: 10.1111/mec.16696] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2022] [Revised: 09/01/2022] [Accepted: 09/06/2022] [Indexed: 02/06/2023]
Abstract
Understanding the role of genetic and nongenetic variants in modulating phenotypes is central to our knowledge of adaptive responses to local conditions and environmental change, particularly in species with such low population genetic diversity that it is likely to limit their evolutionary potential. A first step towards uncovering the molecular mechanisms underlying population-specific responses to the environment is to carry out environmental association studies. We associated climatic variation with genetic, epigenetic and microbiome variation in populations of a social spider with extremely low standing genetic diversity. We identified genetic variants that are associated strongly with environmental variation, particularly with average temperature, a pattern consistent with local adaptation. Variation in DNA methylation in many genes was strongly correlated with a wide set of climate parameters, thereby revealing a different pattern of associations than that of genetic variants, which show strong correlations to a more restricted range of climate parameters. DNA methylation levels were largely independent of cis-genetic variation and of overall genetic population structure, suggesting that DNA methylation can work as an independent mechanism. Microbiome composition also correlated with environmental variation, but most strong associations were with precipitation-related climatic factors. Our results suggest a role for both genetic and nongenetic mechanisms in shaping phenotypic responses to local environments.
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Affiliation(s)
- Anne Aagaard
- Section for Genetics, Ecology & Evolution, Department of BiologyAarhus UniversityAarhus CDenmark
| | - Shenglin Liu
- Section for Genetics, Ecology & Evolution, Department of BiologyAarhus UniversityAarhus CDenmark
| | - Tom Tregenza
- Centre for Ecology & Conservation, School of BiosciencesUniversity of ExeterPenryn CampusUK
| | - Marie Braad Lund
- Section for Microbiology, Department of BiologyAarhus UniversityAarhus CDenmark
| | - Andreas Schramm
- Section for Microbiology, Department of BiologyAarhus UniversityAarhus CDenmark
| | - Koen J. F. Verhoeven
- Terrestrial Ecology DepartmentNetherlands Institute of Ecology (NIOO‐KNAW)WageningenThe Netherlands
| | - Jesper Bechsgaard
- Section for Genetics, Ecology & Evolution, Department of BiologyAarhus UniversityAarhus CDenmark
| | - Trine Bilde
- Section for Genetics, Ecology & Evolution, Department of BiologyAarhus UniversityAarhus CDenmark
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17
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Burny C, Nolte V, Dolezal M, Schlötterer C. Genome-wide selection signatures reveal widespread synergistic effects of two different stressors in Drosophila melanogaster. Proc Biol Sci 2022; 289:20221857. [PMID: 36259211 PMCID: PMC9579754 DOI: 10.1098/rspb.2022.1857] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Experimental evolution combined with whole-genome sequencing (evolve and resequence (E&R)) is a powerful approach to study the adaptive architecture of selected traits. Nevertheless, so far the focus has been on the selective response triggered by a single stressor. Building on the highly parallel selection response of founder populations with reduced variation, we evaluated how the presence of a second stressor affects the genomic selection response. After 20 generations of adaptation to laboratory conditions at either 18°C or 29°C, strong genome-wide selection signatures were observed. Only 38% of the selection signatures can be attributed to laboratory adaptation (no difference between temperature regimes). The remaining selection responses are either caused by temperature-specific effects, or reflect the joint effects of temperature and laboratory adaptation (same direction, but the magnitude differs between temperatures). The allele frequency changes resulting from the combined effects of temperature and laboratory adaptation were more extreme in the hot environment for 83% of the affected genomic regions-indicating widespread synergistic effects of the two stressors. We conclude that E&R with reduced genetic variation is a powerful approach to study genome-wide fitness consequences driven by the combined effects of multiple environmental factors.
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Affiliation(s)
- Claire Burny
- Institut für Populationsgenetik, Vetmeduni Vienna, Veterinärplatz 1, Vienna 1210, Austria.,Vienna Graduate School of Population Genetics, Vetmeduni Vienna, Vienna 1210, Austria
| | - Viola Nolte
- Institut für Populationsgenetik, Vetmeduni Vienna, Veterinärplatz 1, Vienna 1210, Austria
| | - Marlies Dolezal
- Plattform Bioinformatik und Biostatistik, Vetmeduni Vienna, Vienna 1210, Austria
| | - Christian Schlötterer
- Institut für Populationsgenetik, Vetmeduni Vienna, Veterinärplatz 1, Vienna 1210, Austria
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18
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Heras J, Martin CH. Minimal overall divergence of the gut microbiome in an adaptive radiation of Cyprinodon pupfishes despite potential adaptive enrichment for scale-eating. PLoS One 2022; 17:e0273177. [PMID: 36112615 PMCID: PMC9481044 DOI: 10.1371/journal.pone.0273177] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2022] [Accepted: 08/03/2022] [Indexed: 11/18/2022] Open
Abstract
Adaptive radiations offer an excellent opportunity to understand the eco-evolutionary dynamics of gut microbiota and host niche specialization. In a laboratory common garden, we compared the gut microbiota of two novel derived trophic specialist pupfishes, a scale-eater and a molluscivore, to closely related and distant outgroup generalist populations, spanning both rapid trophic evolution within 10 kya and stable generalist diets persisting over 11 Mya. We predicted an adaptive and highly divergent microbiome composition in the trophic specialists reflecting their rapid rates of craniofacial and behavioral diversification. We sequenced 16S rRNA amplicons of gut microbiomes from lab-reared adult pupfishes raised under identical conditions and fed the same high protein diet. In contrast to our predictions, gut microbiota largely reflected phylogenetic distance among species, rather than generalist or specialist life history, in support of phylosymbiosis. However, we did find significant enrichment of Burkholderiaceae bacteria in replicated lab-reared scale-eater populations. These bacteria sometimes digest collagen, the major component of fish scales, supporting an adaptive shift. We also found some enrichment of Rhodobacteraceae and Planctomycetia in lab-reared molluscivore populations, but these bacteria target cellulose. Overall phylogenetic conservation of microbiome composition contrasts with predictions of adaptive radiation theory and observations of rapid diversification in all other trophic traits in these hosts, including craniofacial morphology, foraging behavior, aggression, and gene expression, suggesting that the functional role of these minor shifts in microbiota will be important for understanding the role of the microbiome in trophic diversification.
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Affiliation(s)
- Joseph Heras
- Department of Integrative Biology, University of California, Berkeley, Berkeley, CA, United States of America
- Museum of Vertebrate Zoology, University of California, Berkeley, Berkeley, CA, United States of America
- * E-mail:
| | - Christopher H. Martin
- Department of Integrative Biology, University of California, Berkeley, Berkeley, CA, United States of America
- Museum of Vertebrate Zoology, University of California, Berkeley, Berkeley, CA, United States of America
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19
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Bacterial Metabolism and Transport Genes Are Associated with the Preference of Drosophila melanogaster for Dietary Yeast. Appl Environ Microbiol 2022; 88:e0072022. [PMID: 35913151 PMCID: PMC9397100 DOI: 10.1128/aem.00720-22] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023] Open
Abstract
Many animal traits are influenced by their associated microorganisms ("microbiota"). To expand our understanding of the relationship between microbial genotype and host phenotype, we report an analysis of the influence of the microbiota on the dietary preference of the fruit fly Drosophila melanogaster. First, we confirmed through experiments on flies reared bacteria-free ("axenic") or in monoassociation with two different strains of bacteria that the microbiota significantly influences fruit fly dietary preference across a range of ratios of dietary yeast:dietary glucose. Then, focusing on microbiota-dependent changes in fly dietary preference for yeast (DPY), we performed a metagenome-wide association (MGWA) study to define microbial species specificity for this trait and to predict bacterial genes that influence it. In a subsequent mutant analysis, we confirmed that disrupting a subset of the MGWA-predicted genes influences fly DPY, including for genes involved in thiamine biosynthesis and glucose transport. Follow-up tests revealed that the bacterial influence on fly DPY did not depend on bacterial modification of the glucose or protein content of the fly diet, suggesting that the bacteria mediate their effects independent of the fly diet or through more specific dietary changes than broad ratios of protein and glucose. Together, these findings provide additional insight into bacterial determinants of host nutrition and behavior by revealing specific genetic disruptions that influence D. melanogaster DPY. IMPORTANCE Associated microorganisms ("microbiota") impact the physiology and behavior of their hosts, and defining the mechanisms underlying these interactions is a major gap in the field of host-microbe interactions. This study expands our understanding of how the microbiota can influence dietary preference for yeast (DPY) of a model host, Drosophila melanogaster. First, we show that fly preferences for a range of different dietary yeast:dietary glucose ratios vary significantly with the identity of the microbes that colonize the fruit flies. We then performed a metagenome-wide association study to identify candidate bacterial genes that contributed to some of these bacterial influences. We confirmed that disrupting some of the predicted genes, including genes involved in glucose transport and thiamine biosynthesis, resulted in changes to fly DPY and show that the influence of two of these genes is not through changes in dietary ratios of protein to glucose. Together, these efforts expand our understanding of the bacterial genetic influences on a feeding behavior of a model animal host.
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20
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Verheyen J, Delnat V, Theys C. Daily temperature fluctuations can magnify the toxicity of pesticides. CURRENT OPINION IN INSECT SCIENCE 2022; 51:100919. [PMID: 35390505 DOI: 10.1016/j.cois.2022.100919] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/14/2022] [Revised: 03/22/2022] [Accepted: 03/28/2022] [Indexed: 06/14/2023]
Abstract
We review the effect of daily temperature fluctuations (DTF), a key thermal factor predicted to increase under climate change, on pesticide toxicity. The effect of DTF on pesticide toxicity may be explained by: (i) a DTF-specific mechanism (caused by Jensen's inequality) and (ii) general mechanisms underlying an increased pesticide toxicity at both higher (increased energetic costs, pesticide uptake and metabolic conversion) and lower constant temperatures (lower organismal metabolic and associated elimination rates, increased sodium channel modulated nervous system vulnerability and energetic costs). Furthermore, DTF may enhance pesticide-induced reductions in heat tolerance due to stronger effects on oxygen demand (increase) and oxygen supply (decrease). Our literature review showed considerable support that DTF increase the negative impact of pesticides on insects, especially in terms of decreased survival. Therefore, we suggest that considering DTF in ecotoxicological studies may be of great importance to better protect biodiversity in our warming world.
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Affiliation(s)
- Julie Verheyen
- Evolutionary Stress Ecology and Ecotoxicology, Deberiotstraat 32, 3000 Leuven, Belgium.
| | - Vienna Delnat
- Evolutionary Stress Ecology and Ecotoxicology, Deberiotstraat 32, 3000 Leuven, Belgium
| | - Charlotte Theys
- Evolutionary Stress Ecology and Ecotoxicology, Deberiotstraat 32, 3000 Leuven, Belgium
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21
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Ørsted M, Yashiro E, Hoffmann AA, Kristensen TN. Population bottlenecks constrain host microbiome diversity and genetic variation impeding fitness. PLoS Genet 2022; 18:e1010206. [PMID: 35604942 PMCID: PMC9166449 DOI: 10.1371/journal.pgen.1010206] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2021] [Revised: 06/03/2022] [Accepted: 04/18/2022] [Indexed: 11/23/2022] Open
Abstract
It is becoming increasingly clear that microbial symbionts influence key aspects of their host’s fitness, and vice versa. This may fundamentally change our thinking about how microbes and hosts interact in influencing fitness and adaptation to changing environments. Here we explore how reductions in population size commonly experienced by threatened species influence microbiome diversity. Consequences of such reductions are normally interpreted in terms of a loss of genetic variation, increased inbreeding and associated inbreeding depression. However, fitness effects of population bottlenecks might also be mediated through microbiome diversity, such as through loss of functionally important microbes. Here we utilise 50 Drosophila melanogaster lines with different histories of population bottlenecks to explore these questions. The lines were phenotyped for egg-to-adult viability and their genomes sequenced to estimate genetic variation. The bacterial 16S rRNA gene was amplified in these lines to investigate microbial diversity. We found that 1) host population bottlenecks constrained microbiome richness and diversity, 2) core microbiomes of hosts with low genetic variation were constituted from subsets of microbiomes found in flies with higher genetic variation, 3) both microbiome diversity and host genetic variation contributed to host population fitness, 4) connectivity and robustness of bacterial networks was low in the inbred lines regardless of host genetic variation, 5) reduced microbial diversity was associated with weaker evolutionary responses of hosts in stressful environments, and 6) these effects were unrelated to Wolbachia density. These findings suggest that population bottlenecks reduce hologenomic variation (combined host and microbial genetic variation). Thus, while the current biodiversity crisis focuses on population sizes and genetic variation of eukaryotes, an additional focal point should be the microbial diversity carried by the eukaryotes, which in turn may influence host fitness and adaptability with consequences for the persistence of populations. It is becoming increasingly clear that organisms and the microbes that live on or in them–their microbiome–affect each other in profound ways that we are just beginning to understand. For instance, a diverse microbiome can help maintain metabolic functions or fight pathogens causing diseases. A disrupted microbiome may be especially critical for animals and plants that occur in low numbers because of threats from e.g. human exploitation or climate change, as they may already suffer from genetic challenges such as inbreeding and reduced evolutionary potential. The importance of such a reduction in population size, called a bottleneck, on the microbial diversity and the potential interactive effects on host health remains unexplored. Here we experimentally test these associations by investigating the microbiomes of 50 inbred or non-inbred populations of vinegar flies. We found that restricting the population size constrain the host’s genetic variation and simultaneously decreases the diversity of the microbiome that they harbor, and that both effects were detrimental to host fitness. The microbial communities in inbred host populations were less robust than in their non-inbred counterparts, suggesting that we should increasingly consider the microbiome diversity, which may ultimately influence the health and persistence of threatened species.
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Affiliation(s)
- Michael Ørsted
- Section for Zoophysiology, Department of Biology, Aarhus University, Aarhus, Denmark
- Section for Bioscience and Engineering, Department of Chemistry and Bioscience, Aalborg University, Aalborg, Denmark
- * E-mail:
| | - Erika Yashiro
- Section for Bioscience and Engineering, Department of Chemistry and Bioscience, Aalborg University, Aalborg, Denmark
- Institute for Plant Sciences, Department of Biology, University of Cologne, Cologne, Germany
| | - Ary A. Hoffmann
- Section for Bioscience and Engineering, Department of Chemistry and Bioscience, Aalborg University, Aalborg, Denmark
- School of Biosciences, Bio21 Molecular Science and Biotechnology Institute, University of Melbourne, Melbourne, Australia
| | - Torsten Nygaard Kristensen
- Section for Bioscience and Engineering, Department of Chemistry and Bioscience, Aalborg University, Aalborg, Denmark
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22
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Chandler JA, Innocent LV, Martinez DJ, Huang IL, Yang JL, Eisen MB, Ludington WB. Microbiome-by-ethanol interactions impact Drosophila melanogaster fitness, physiology, and behavior. iScience 2022; 25:104000. [PMID: 35313693 PMCID: PMC8933687 DOI: 10.1016/j.isci.2022.104000] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2021] [Revised: 06/24/2021] [Accepted: 02/25/2022] [Indexed: 02/07/2023] Open
Abstract
The gut microbiota can affect how animals respond to ingested toxins, such as ethanol, which is prevalent in the diets of diverse animals and often leads to negative health outcomes in humans. Ethanol is a complex dietary factor because it acts as a toxin, behavioral manipulator, and nutritional source, with both direct effects on the host as well as indirect ones through the microbiome. Here, we developed a model for chronic, non-intoxicating ethanol ingestion in the adult fruit fly, Drosophila melanogaster, and paired this with the tractability of the fly gut microbiota, which can be experimentally removed. We linked numerous physiological, behavioral, and transcriptional variables to fly fitness, including a combination of intestinal barrier integrity, stored triglyceride levels, feeding behavior, and the immunodeficiency pathway. Our results reveal a complex tradeoff between lifespan and fecundity that is microbiome-dependent and modulated by dietary ethanol and feeding behavior.
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Affiliation(s)
- James Angus Chandler
- Department of Molecular and Cell Biology, University of California, Berkeley, CA 94720, USA
| | - Lina Victoria Innocent
- Department of Molecular and Cell Biology, University of California, Berkeley, CA 94720, USA
| | | | - Isaac Li Huang
- Department of Molecular and Cell Biology, University of California, Berkeley, CA 94720, USA
| | - Jane Lani Yang
- Department of Molecular and Cell Biology, University of California, Berkeley, CA 94720, USA
| | - Michael Bruce Eisen
- Department of Molecular and Cell Biology, University of California, Berkeley, CA 94720, USA
- Department of Integrative Biology, University of California, Berkeley, CA 94720, USA
- Howard Hughes Medical Institute, Chevy Chase, MD, USA
| | - William Basil Ludington
- Department of Molecular and Cell Biology, University of California, Berkeley, CA 94720, USA
- Department of Embryology, Carnegie Institution for Science, Baltimore, MD 21218, USA
- Department of Biology, Johns Hopkins University, Baltimore, MD 21218, USA
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Boutry J, Mistral J, Berlioz L, Klimovich A, Tökölyi J, Fontenille L, Ujvari B, Dujon AM, Giraudeau M, Thomas F. Tumors (re)shape biotic interactions within ecosystems: Experimental evidence from the freshwater cnidarian Hydra. THE SCIENCE OF THE TOTAL ENVIRONMENT 2022; 803:149923. [PMID: 34487898 DOI: 10.1016/j.scitotenv.2021.149923] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/09/2021] [Revised: 08/22/2021] [Accepted: 08/22/2021] [Indexed: 05/25/2023]
Abstract
While it is often assumed that oncogenic processes in metazoans can influence species interactions, empirical evidence is lacking. Here, we use the cnidarian Hydra oligactis to experimentally explore the consequences of tumor associated phenotypic alterations for its predation ability, relationship with commensal ciliates and vulnerability to predators. Unexpectedly, hydra's predation ability was higher in tumorous polyps compared to non-tumorous ones. Commensal ciliates colonized preferentially tumorous hydras than non-tumorous ones, and had a higher replication rate on the former. Finally, in a choice experiment, tumorous hydras were preferentially eaten by a fish predator. This study, for the first time, provides evidence that neoplastic growth has the potential, through effect(s) on host phenotype, to alter biotic interactions within ecosystems and should thus be taken into account by ecologists.
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Affiliation(s)
- Justine Boutry
- CREEC/CANECEV (CREES), MIVEGEC, Unité Mixte de Recherches, IRD 224-CNRS 5290-Université de Montpellier, Montpellier, France.
| | - Juliette Mistral
- CREEC/CANECEV (CREES), MIVEGEC, Unité Mixte de Recherches, IRD 224-CNRS 5290-Université de Montpellier, Montpellier, France
| | - Laurent Berlioz
- CREEC/CANECEV (CREES), MIVEGEC, Unité Mixte de Recherches, IRD 224-CNRS 5290-Université de Montpellier, Montpellier, France
| | | | - Jácint Tökölyi
- MTA-DE Behavioural Ecology Research Group, Department of Evolutionary Zoology, University of Debrecen, 4032 Debrecen, Hungary
| | - Laura Fontenille
- AZELEAD, 377 Rue du Professeur Blayac, 34080 Montpellier, France
| | - Beata Ujvari
- CREEC/CANECEV (CREES), MIVEGEC, Unité Mixte de Recherches, IRD 224-CNRS 5290-Université de Montpellier, Montpellier, France; Centre for Integrative Ecology, School of Life and Environmental Sciences, Deakin University, Waurn Ponds, Victoria, Australia
| | - Antoine M Dujon
- CREEC/CANECEV (CREES), MIVEGEC, Unité Mixte de Recherches, IRD 224-CNRS 5290-Université de Montpellier, Montpellier, France; Centre for Integrative Ecology, School of Life and Environmental Sciences, Deakin University, Waurn Ponds, Victoria, Australia
| | - Mathieu Giraudeau
- CREEC/CANECEV (CREES), MIVEGEC, Unité Mixte de Recherches, IRD 224-CNRS 5290-Université de Montpellier, Montpellier, France; LIENSs, UMR 7266 CNRS-La Rochelle Université, 2 Rue Olympe de Gouges, 17000 La Rochelle, France
| | - Frédéric Thomas
- CREEC/CANECEV (CREES), MIVEGEC, Unité Mixte de Recherches, IRD 224-CNRS 5290-Université de Montpellier, Montpellier, France
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24
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Mazzucco R, Schlötterer C. Long-term gut microbiome dynamics in Drosophila melanogaster reveal environment-specific associations between bacterial taxa at the family level. Proc Biol Sci 2021; 288:20212193. [PMID: 34905708 PMCID: PMC8670958 DOI: 10.1098/rspb.2021.2193] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023] Open
Abstract
The influence of the microbiome on its host is well-documented, but the interplay of its members is not yet well-understood. Even for simple microbiomes, the interaction among members of the microbiome is difficult to study. Longitudinal studies provide a promising approach to studying such interactions through the temporal covariation of different taxonomic units. By contrast to most longitudinal studies, which span only a single host generation, we here present a post hoc analysis of a whole-genome dataset of 81 samples that follows microbiome composition for up to 180 host generations, which cover nearly 10 years. The microbiome diversity remained rather stable in replicated Drosophila melanogaster populations exposed to two different temperature regimes. The composition changed, however, systematically across replicates of the two temperature regimes. Significant associations between families, mostly specific to one temperature regime, indicate functional interdependence of different microbiome components. These associations also involve moderately abundant families, which emphasizes their functional importance, and highlights the importance of looking beyond the common constituents of the Drosophila microbiome.
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Affiliation(s)
- Rupert Mazzucco
- Institut für Populationsgenetik, Veterinärmedizinische Universität Wien, Veterinärplatz 1, Wien 1210, Austria
| | - Christian Schlötterer
- Institut für Populationsgenetik, Veterinärmedizinische Universität Wien, Veterinärplatz 1, Wien 1210, Austria
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25
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An altered microbiome in a Parkinson's disease model Drosophila melanogaster has a negative effect on development. Sci Rep 2021; 11:23635. [PMID: 34880269 PMCID: PMC8654912 DOI: 10.1038/s41598-021-02624-1] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2021] [Accepted: 11/08/2021] [Indexed: 11/30/2022] Open
Abstract
Parkinson’s disease (PD) is the second most common neurodegenerative disease, besides Alzheimer’s Disease, characterized by multiple symptoms, including the well-known motor dysfunctions. It is well-established that there are differences in the fecal microbiota composition between Parkinson’s disease (PD) patients and control populations, but the mechanisms underlying these differences are not yet fully understood. To begin to close the gap between description and mechanism we studied the relationship between the microbiota and PD in a model organism, Drosophila melanogaster. First, fecal transfers were performed with a D. melanogaster model of PD that had a mutation in the parkin (park25) gene. Results indicate that the PD model feces had a negative effect on both pupation and eclosion in both control and park25 flies, with a greater effect in PD model flies. Analysis of the microbiota composition revealed differences between the control and park25 flies, consistent with many human studies. Conversely, gnotobiotic treatment of axenic embryos with feces-derived bacterial cultures did not affect eclosure. We speculate this result might be due to similarities in bacterial prevalence between mutant and control feces. Further, we confirmed a bacteria-potentiated impact on mutant and control fly phenotypes by measuring eclosure rate in park25 flies that were mono-associated with members of the fly microbiota. Both the fecal transfer and the mono-association results indicate a host genotype-microbiota interaction. Overall, this study concludes functional effects of the fly microbiota on PD model flies, providing support to the developing body of knowledge regarding the influence of the microbiota on PD.
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26
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Vega NM, Ludington WB. From a parts list to assembly instructions and an operating manual: how small host models can re-write microbiome theory. Curr Opin Microbiol 2021; 64:146-151. [PMID: 34739919 DOI: 10.1016/j.mib.2021.10.006] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2021] [Revised: 08/10/2021] [Accepted: 10/08/2021] [Indexed: 10/20/2022]
Affiliation(s)
- Nic M Vega
- Biology Department, Emory University, Atlanta, GA, United States.
| | - William B Ludington
- Department of Embryology, Carnegie Institution of Washington, Baltimore, MD, United States
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27
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Matthews MK, Malcolm J, Chaston JM. Microbiota Influences Fitness and Timing of Reproduction in the Fruit Fly Drosophila melanogaster. Microbiol Spectr 2021; 9:e0003421. [PMID: 34585986 PMCID: PMC8557915 DOI: 10.1128/spectrum.00034-21] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2021] [Accepted: 08/21/2021] [Indexed: 11/20/2022] Open
Abstract
Associated microorganisms ("microbiota") play a central role in determining many animals' survival and reproduction characteristics. The impact of these microbial influences on an animal's fitness, or population growth, in a given environment has not been defined as clearly. We focused on microbiota-dependent host fitness by measuring life span and fecundity in Drosophila melanogaster fruit flies reared individually with 14 different bacterial species. Consistent with previous observations, the different bacteria significantly influenced the timing of fly life span and fecundity. Using Leslie matrices, we show that fly fitness was lowest when the microbes caused the flies to invest in life span over fecundity. Computational permutations showed that the positive fitness effect of investing in reproduction was reversed if fly survival over time was low, indicating that the observed fitness influences of the microbes could be context dependent. Finally, we showed that fly fitness is not influenced by bacterial genes that shape fly life span or fly triglyceride content, a trait that is related to fly survival and reproduction. Also, metagenome-wide association did not identify any microbial genes that were associated with variation in fly fitness. Therefore, the bacterial genetic basis for influencing fly fitness remains unknown. We conclude that bacteria influence a fly's reproductive timing more than total reproductive output and that (e.g., environmental) conditions that influence fly survival likely determine which bacteria benefit fly fitness. IMPORTANCE The ability of associated microorganisms ("microbiota") to influence animal life history traits has been recognized and investigated, especially in the past 2 decades. For many microbial communities, there is not always a clear definition of whether the microbiota or its members are beneficial, pathogenic, or relatively neutral to their hosts' fitness. In this study, we report the influence of individual members of the microbiota on Drosophila melanogaster fitness using Leslie matrices that combine the microbial influences on fly survival and reproduction into a single fitness measure. Our results are consistent with a previous report that, in the laboratory, acetic acid bacteria are more beneficial to the flies than many strains of lactic acid bacteria. We add to the previous finding by showing that this benefit depends on fly survival rate. Together, our work helps to show how the microbiota of a fly influences its laboratory fitness and how these effects may translate to a wild setting.
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Affiliation(s)
- Melinda K. Matthews
- Department of Plant and Wildlife Sciences, Brigham Young University, Provo, Utah, USA
| | - Jaanna Malcolm
- Department of Plant and Wildlife Sciences, Brigham Young University, Provo, Utah, USA
| | - John M. Chaston
- Department of Plant and Wildlife Sciences, Brigham Young University, Provo, Utah, USA
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28
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Horizontal gene transfer-mediated bacterial strain variation affects host fitness in Drosophila. BMC Biol 2021; 19:187. [PMID: 34565363 PMCID: PMC8474910 DOI: 10.1186/s12915-021-01124-y] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2021] [Accepted: 08/13/2021] [Indexed: 02/07/2023] Open
Abstract
Background How microbes affect host fitness and environmental adaptation has become a fundamental research question in evolutionary biology. To better understand the role of microbial genomic variation for host fitness, we tested for associations of bacterial genomic variation and Drosophila melanogaster offspring number in a microbial Genome Wide Association Study (GWAS). Results We performed a microbial GWAS, leveraging strain variation in the genus Gluconobacter, a genus of bacteria that are commonly associated with Drosophila under natural conditions. We pinpoint the thiamine biosynthesis pathway (TBP) as contributing to differences in fitness conferred to the fly host. While an effect of thiamine on fly development has been described, we show that strain variation in TBP between bacterial isolates from wild-caught D. melanogaster contributes to variation in offspring production by the host. By tracing the evolutionary history of TBP genes in Gluconobacter, we find that TBP genes were most likely lost and reacquired by horizontal gene transfer (HGT). Conclusion Our study emphasizes the importance of strain variation and highlights that HGT can add to microbiome flexibility and potentially to host adaptation. Supplementary Information The online version contains supplementary material available at 10.1186/s12915-021-01124-y.
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29
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McMullen JG, Bueno E, Blow F, Douglas AE. Genome-Inferred Correspondence between Phylogeny and Metabolic Traits in the Wild Drosophila Gut Microbiome. Genome Biol Evol 2021; 13:evab127. [PMID: 34081101 PMCID: PMC8358223 DOI: 10.1093/gbe/evab127] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 05/29/2021] [Indexed: 12/03/2022] Open
Abstract
Annotated genome sequences provide valuable insight into the functional capabilities of members of microbial communities. Nevertheless, most studies on the microbiome in animal guts use metagenomic data, hampering the assignment of genes to specific microbial taxa. Here, we make use of the readily culturable bacterial communities in the gut of the fruit fly Drosophila melanogaster to obtain draft genome sequences for 96 isolates from wild flies. These include 81 new de novo assembled genomes, assigned to three orders (Enterobacterales, Lactobacillales, and Rhodospirillales) with 80% of strains identified to species level using average nucleotide identity and phylogenomic reconstruction. Based on annotations by the RAST pipeline, among-isolate variation in metabolic function partitioned strongly by bacterial order, particularly by amino acid metabolism (Rhodospirillales), fermentation, and nucleotide metabolism (Lactobacillales) and arginine, urea, and polyamine metabolism (Enterobacterales). Seven bacterial species, comprising 2-3 species in each order, were well-represented among the isolates and included ≥5 strains, permitting analysis of metabolic functions in the accessory genome (i.e., genes not present in every strain). Overall, the metabolic function in the accessory genome partitioned by bacterial order. Two species, Gluconobacter cerinus (Rhodospirillales) and Lactiplantibacillus plantarum (Lactobacillales) had large accessory genomes, and metabolic functions were dominated by amino acid metabolism (G. cerinus) and carbohydrate metabolism (La. plantarum). The patterns of variation in metabolic capabilities at multiple phylogenetic scales provide the basis for future studies of the ecological and evolutionary processes shaping the diversity of microorganisms associated with natural populations of Drosophila.
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Affiliation(s)
- John G McMullen
- Department of Entomology, Cornell University, Ithaca, New York, USA
| | - Eduardo Bueno
- Department of Entomology, Cornell University, Ithaca, New York, USA
| | - Frances Blow
- Department of Entomology, Cornell University, Ithaca, New York, USA
| | - Angela E Douglas
- Department of Entomology, Cornell University, Ithaca, New York, USA
- Department of Molecular Biology and Genetics, Cornell University, Ithaca, New York, USA
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30
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Jaramillo A, Castañeda LE. Gut Microbiota of Drosophila subobscura Contributes to Its Heat Tolerance and Is Sensitive to Transient Thermal Stress. Front Microbiol 2021; 12:654108. [PMID: 34025608 PMCID: PMC8137359 DOI: 10.3389/fmicb.2021.654108] [Citation(s) in RCA: 20] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2021] [Accepted: 03/26/2021] [Indexed: 12/13/2022] Open
Abstract
The gut microbiota can contribute to host physiology leading to an increase of resistance to abiotic stress conditions. For instance, temperature has profound effects on ectotherms, and the role of the gut microbiota on the thermal tolerance of ectotherms is a matter of recent research. However, most of these studies have been focused on single static temperatures instead of evaluating thermal tolerance in a wide range of stressful temperatures. Additionally, there is evidence supporting that the gut microbiota is sensitive to environmental temperature, which induces changes in its composition and diversity. These studies have evaluated the effects of thermal acclimation (>2 weeks) on the gut microbiota, but we know little about the impact of transient thermal stress on the composition and diversity of the gut microbiota. Thus, we investigated the role of the gut microbiota on the heat tolerance of Drosophila subobscura by measuring the heat tolerance of conventional and axenic flies exposed to different heat stressful temperatures (35, 36, 37, and 38°C) and estimating the heat tolerance landscape for both microbiota treatments. Conventional flies exposed to mild heat conditions exhibited higher thermal tolerance than axenic flies, whereas at higher stressful temperatures there were no differences between axenic and conventional flies. We also assessed the impact of transient heat stress on the taxonomical abundance, diversity, and community structure of the gut microbiota, comparing non-stressed flies (exposed to 21°C) and heat-stressed flies (exposed to 34°C) from both sexes. Bacterial diversity indices, bacterial abundances, and community structure changed between non-stressed and heat-stressed flies, and this response was sex-dependent. In general, our findings provide evidence that the gut microbiota influences heat tolerance and that heat stress modifies the gut microbiota at the taxonomical and structural levels. These results demonstrate that the gut microbiota contributes to heat tolerance and is also highly sensitive to transient heat stress, which could have important consequences on host fitness, population risk extinction, and the vulnerability of ectotherms to current and future climatic conditions.
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Affiliation(s)
- Angélica Jaramillo
- Programa de Genética Humana, Instituto de Ciencias Biomédicas, Facultad de Medicina, Universidad de Chile, Santiago, Chile
| | - Luis E Castañeda
- Programa de Genética Humana, Instituto de Ciencias Biomédicas, Facultad de Medicina, Universidad de Chile, Santiago, Chile
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31
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Zhou F, Liu B, Liu X, Li Y, Wang L, Huang J, Luo G, Wang X. The Impact of Microbiome and Microbiota-Derived Sodium Butyrate on Drosophila Transcriptome and Metabolome Revealed by Multi-Omics Analysis. Metabolites 2021; 11:298. [PMID: 34066348 PMCID: PMC8148185 DOI: 10.3390/metabo11050298] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2021] [Revised: 04/15/2021] [Accepted: 04/20/2021] [Indexed: 12/19/2022] Open
Abstract
The host microbiome plays an important role in regulating physiology through microbiota-derived metabolites during host-microbiome interactions. However, molecular mechanism underly host-microbiome interactions remains to be explored. In this study, we used Drosophila as the model to investigate the influence of microbiome and microbiota-derived metabolite sodium butyrate on host transcriptome and metabolome. We established both a sterile Drosophila model and a conventional Drosophila model to demonstrate the role of sodium butyrate. Using multi-omics analysis, we found that microbiome and sodium butyrate could impact host gene expression patterns in both the sterile Drosophila model and the conventional Drosophila model. The analysis of gut microbial using 16S rRNA sequencing showed sodium butyrate treatment also influenced Drosophila bacterial structures. In addition, Drosophila metabolites identified by ultra-high performance liquid chromatography-MS/MS were shown to be affected by sodium butyrate treatment with lipids as the dominant changed components. Our integrative analysis of the transcriptome, the microbiome, and the metabolome data identified candidate transcripts that are coregulated by sodium butyrate. Taken together, our results reveal the impact of the microbiome and microbiota-derived sodium butyrate on host transcriptome and metabolome, and our work provides a better understanding of host-microbiome interactions at the molecular level with multi-omics data.
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Affiliation(s)
- Fan Zhou
- Guangdong Provincial Key Laboratory of Insect Developmental Biology and Applied Technology, Institute of Insect Science and Technology, School of Life Sciences, South China Normal University, Guangzhou 510631, China; (F.Z.); (X.L.); (L.W.); (J.H.)
| | - Biaodi Liu
- State Key Laboratory of Biocontrol, School of Life Sciences, Sun Yat-sen University, Guangzhou 510275, China; (B.L.); (Y.L.)
| | - Xin Liu
- Guangdong Provincial Key Laboratory of Insect Developmental Biology and Applied Technology, Institute of Insect Science and Technology, School of Life Sciences, South China Normal University, Guangzhou 510631, China; (F.Z.); (X.L.); (L.W.); (J.H.)
| | - Yan Li
- State Key Laboratory of Biocontrol, School of Life Sciences, Sun Yat-sen University, Guangzhou 510275, China; (B.L.); (Y.L.)
| | - Luoluo Wang
- Guangdong Provincial Key Laboratory of Insect Developmental Biology and Applied Technology, Institute of Insect Science and Technology, School of Life Sciences, South China Normal University, Guangzhou 510631, China; (F.Z.); (X.L.); (L.W.); (J.H.)
| | - Jia Huang
- Guangdong Provincial Key Laboratory of Insect Developmental Biology and Applied Technology, Institute of Insect Science and Technology, School of Life Sciences, South China Normal University, Guangzhou 510631, China; (F.Z.); (X.L.); (L.W.); (J.H.)
| | - Guanzheng Luo
- State Key Laboratory of Biocontrol, School of Life Sciences, Sun Yat-sen University, Guangzhou 510275, China; (B.L.); (Y.L.)
| | - Xiaoyun Wang
- Guangdong Provincial Key Laboratory of Insect Developmental Biology and Applied Technology, Institute of Insect Science and Technology, School of Life Sciences, South China Normal University, Guangzhou 510631, China; (F.Z.); (X.L.); (L.W.); (J.H.)
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32
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Henry LP, Ayroles JF. Meta-analysis suggests the microbiome responds to Evolve and Resequence experiments in Drosophila melanogaster. BMC Microbiol 2021; 21:108. [PMID: 33836662 PMCID: PMC8034159 DOI: 10.1186/s12866-021-02168-4] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2020] [Accepted: 03/31/2021] [Indexed: 01/01/2023] Open
Abstract
BACKGROUND Experimental evolution has a long history of uncovering fundamental insights into evolutionary processes, but has largely neglected one underappreciated component--the microbiome. As eukaryotic hosts evolve, the microbiome may also respond to selection. However, the microbial contribution to host evolution remains poorly understood. Here, we re-analyzed genomic data to characterize the metagenomes from ten Evolve and Resequence (E&R) experiments in Drosophila melanogaster to determine how the microbiome changed in response to host selection. RESULTS Bacterial diversity was significantly different in 5/10 studies, primarily in traits associated with metabolism or immunity. Duration of selection did not significantly influence bacterial diversity, highlighting the importance of associations with specific host traits. CONCLUSIONS Our genomic re-analysis suggests the microbiome often responds to host selection; thus, the microbiome may contribute to the response of Drosophila in E&R experiments. We outline important considerations for incorporating the microbiome into E&R experiments. The E&R approach may provide critical insights into host-microbiome interactions and fundamental insight into the genomic basis of adaptation.
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Affiliation(s)
- Lucas P Henry
- Department of Ecology & Evolutionary Biology, 150 Carl Icahn Laboratory, Princeton University, Princeton, NJ, 08544, USA.
- Lewis-Sigler Institute for Integrative Genomics, Princeton University, Princeton, NJ, 08544, USA.
| | - Julien F Ayroles
- Department of Ecology & Evolutionary Biology, 150 Carl Icahn Laboratory, Princeton University, Princeton, NJ, 08544, USA.
- Lewis-Sigler Institute for Integrative Genomics, Princeton University, Princeton, NJ, 08544, USA.
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33
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Akbar S, Huang J, Zhou Q, Gu L, Sun Y, Zhang L, Lyu K, Yang Z. Elevated temperature and toxic Microcystis reduce Daphnia fitness and modulate gut microbiota. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2021; 271:116409. [PMID: 33418289 DOI: 10.1016/j.envpol.2020.116409] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/08/2020] [Revised: 12/22/2020] [Accepted: 12/28/2020] [Indexed: 05/24/2023]
Abstract
The gut microbiota has been increasingly recognized to regulate host fitness, which in turn is dependent on stability of community structure and composition. Many biotic and abiotic factors have been demonstrated to shape gut microbiota of cladocerans. However, the interactive effects of these variables on cladocerans fitness due to alteration of gut microbiota and their linkage with life history parameters are poorly understood. Here, we investigated the responses of Daphnia magna gut microbiota to the combined effects of toxic Microcystis aeruginosa and high temperature and its associations with fitness. We found that under good food regime, the temperature has no effect on the composition of the gut microbiota, whereas under high proportion of toxic M. aeruginosa and high temperature conditions, D. magna lost their symbionts. High proportion of toxic M. aeruginosa and high temperature had synergistically negative effects on D. magna performance due to altered gut microbiota. The high abundance of symbiotic Comamonadaceae and good food increased D. magna fitness. The present study illustrates that understanding life history strategies in response to multiple stressors related to changes in the gut microbiota diversity and composition requires integrated approaches that incorporate multiple linked traits and tether them to one another.
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Affiliation(s)
- Siddiq Akbar
- Jiangsu Key Laboratory for Biodiversity and Biotechnology, School of Biological Sciences, Nanjing Normal University, 1 Wenyuan Road, Nanjing, 210023, China
| | - Jing Huang
- Jiangsu Key Laboratory for Biodiversity and Biotechnology, School of Biological Sciences, Nanjing Normal University, 1 Wenyuan Road, Nanjing, 210023, China
| | - Qiming Zhou
- Jiangsu Key Laboratory for Biodiversity and Biotechnology, School of Biological Sciences, Nanjing Normal University, 1 Wenyuan Road, Nanjing, 210023, China
| | - Lei Gu
- Jiangsu Key Laboratory for Biodiversity and Biotechnology, School of Biological Sciences, Nanjing Normal University, 1 Wenyuan Road, Nanjing, 210023, China
| | - Yunfei Sun
- Jiangsu Key Laboratory for Biodiversity and Biotechnology, School of Biological Sciences, Nanjing Normal University, 1 Wenyuan Road, Nanjing, 210023, China
| | - Lu Zhang
- Jiangsu Key Laboratory for Biodiversity and Biotechnology, School of Biological Sciences, Nanjing Normal University, 1 Wenyuan Road, Nanjing, 210023, China
| | - Kai Lyu
- Jiangsu Key Laboratory for Biodiversity and Biotechnology, School of Biological Sciences, Nanjing Normal University, 1 Wenyuan Road, Nanjing, 210023, China
| | - Zhou Yang
- Jiangsu Key Laboratory for Biodiversity and Biotechnology, School of Biological Sciences, Nanjing Normal University, 1 Wenyuan Road, Nanjing, 210023, China.
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34
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Silva V, Palacios-Muñoz A, Okray Z, Adair KL, Waddell S, Douglas AE, Ewer J. The impact of the gut microbiome on memory and sleep in Drosophila. J Exp Biol 2021; 224:jeb233619. [PMID: 33376141 PMCID: PMC7875489 DOI: 10.1242/jeb.233619] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2020] [Accepted: 12/21/2020] [Indexed: 12/17/2022]
Abstract
The gut microbiome has been proposed to influence diverse behavioral traits of animals, although the experimental evidence is limited and often contradictory. Here, we made use of the tractability of Drosophila melanogaster for both behavioral analyses and microbiome studies to test how elimination of microorganisms affects a number of behavioral traits. Relative to conventional flies (i.e. with unaltered microbiome), microbiologically sterile (axenic) flies displayed a moderate reduction in memory performance in olfactory appetitive conditioning and courtship assays. The microbiological status of the flies had a small or no effect on anxiety-like behavior (centrophobism) or circadian rhythmicity of locomotor activity, but axenic flies tended to sleep for longer and displayed reduced sleep rebound after sleep deprivation. These last two effects were robust for most tests conducted on both wild-type Canton S and w1118 strains, as well for tests using an isogenized panel of flies with mutations in the period gene, which causes altered circadian rhythmicity. Interestingly, the effect of absence of microbiota on a few behavioral features, most notably instantaneous locomotor activity speed, varied among wild-type strains. Taken together, our findings demonstrate that the microbiome can have subtle but significant effects on specific aspects of Drosophila behavior, some of which are dependent on genetic background.
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Affiliation(s)
- Valeria Silva
- Instituto de Neurociencias, and Centro Interdisciplinario de Neurociencia de Valparaíso, Universidad de Valparaíso, Valparaíso 2360102, Chile
| | - Angelina Palacios-Muñoz
- Instituto de Neurociencias, and Centro Interdisciplinario de Neurociencia de Valparaíso, Universidad de Valparaíso, Valparaíso 2360102, Chile
- Centro de Investigación Interoperativo en Ciencias Odontológicas y Médicas, Facultad de Odontología, Universidad de Valparaíso, Valparaíso 2360004, Chile
| | - Zeynep Okray
- Centre for Neural Circuits & Behaviour, University of Oxford, Oxford OX1 3TA, UK
| | - Karen L Adair
- Department of Entomology, Cornell University, Ithaca, NY 14853, USA
| | - Scott Waddell
- Centre for Neural Circuits & Behaviour, University of Oxford, Oxford OX1 3TA, UK
| | - Angela E Douglas
- Department of Entomology, Cornell University, Ithaca, NY 14853, USA
- Department of Molecular Biology and Genetics, Cornell University, Ithaca, NY 14850, USA
| | - John Ewer
- Instituto de Neurociencias, and Centro Interdisciplinario de Neurociencia de Valparaíso, Universidad de Valparaíso, Valparaíso 2360102, Chile
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Funosas G, Triadó-Margarit X, Castro F, Villafuerte R, Delibes-Mateos M, Rouco C, Casamayor EO. Individual fate and gut microbiome composition in the European wild rabbit (Oryctolagus cuniculus). Sci Rep 2021; 11:766. [PMID: 33436896 PMCID: PMC7804928 DOI: 10.1038/s41598-020-80782-4] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2020] [Accepted: 11/30/2020] [Indexed: 01/12/2023] Open
Abstract
Studies connecting microbiome composition and functional performance in wildlife have received little attention and understanding their connections with wildlife physical condition are sorely needed. We studied the variation in gut microbiota (hard fecal pellets) between allopatric subspecies of the European wild rabbit in wild populations and in captured individuals studied under captivity. We evaluated the influence of environmental and host-specific factors. The microbiome of wild rabbit populations reduced its heterogeneity under controlled conditions. None of the host-specific factors tested correlated with the microbiota composition. We only observed significant intra-group dispersion for the age factor. The most diverse microbiomes were rich in Ruminococcaceae potentially holding an enriched functional profile with dominance of cellulases and xylanases, and suggesting higher efficiency in the digestion of fiber-rich food. Conversely, low diversity gut microbiomes showed dominance of Enterobacteriaceae potentially rich in amylases. We preliminary noticed geographical variations in field populations with higher dominance of Ruminococcaceae in south-western than in north-eastern Spain. Spatial differences appeared not to be subspecies driven, since they were lost in captivity, but environmentally driven, although differences in social structure and behavior may also play a role that deserve further investigations. A marginally significant relationship between the Ruminococcaceae/Enterobacteriaceae ratio and potential life expectancy was observed in captive rabbits. We hypothesize that the gut microbiome may determine the efficiency of feeding resource exploitation, and can also be a potential proxy for life expectancy, with potential applications for the management of declining wild herbivorous populations. Such hypotheses remain to be explored in the future.
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Affiliation(s)
- Gerard Funosas
- Microbial Community Ecology, Centre for Advanced Studies of Blanes-Spanish Council for Research CEAB-CSIC, Accés Cala St Francesc, 14, 17300, Blanes, Spain
| | - Xavier Triadó-Margarit
- Microbial Community Ecology, Centre for Advanced Studies of Blanes-Spanish Council for Research CEAB-CSIC, Accés Cala St Francesc, 14, 17300, Blanes, Spain
| | - Francisca Castro
- Departamento de Didácticas Específicas, Universidad de Córdoba, Sociedad, Ecología y Gestión del Medio Ambiente, UCO-IESA, Unidad Asociada al CSIC, 14004, Córdoba, Spain
| | - Rafael Villafuerte
- Institute of Advanced Social Studies-Spanish Council for Research (IESA-CSIC), 14004, Córdoba, Spain
| | - Miguel Delibes-Mateos
- Institute of Advanced Social Studies-Spanish Council for Research (IESA-CSIC), 14004, Córdoba, Spain
| | - Carlos Rouco
- Ecology Area, Faculty of Science, University of Cordoba, Sociedad, Ecología y Gestión del Medio Ambiente, UCO-IESA, Unidad Asociada al CSIC, 14071, Córdoba, Spain
| | - Emilio O Casamayor
- Microbial Community Ecology, Centre for Advanced Studies of Blanes-Spanish Council for Research CEAB-CSIC, Accés Cala St Francesc, 14, 17300, Blanes, Spain.
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Slowinski S, Ramirez I, Narayan V, Somayaji M, Para M, Pi S, Jadeja N, Karimzadegan S, Pees B, Shapira M. Interactions with a Complex Microbiota Mediate a Trade-Off between the Host Development Rate and Heat Stress Resistance. Microorganisms 2020; 8:microorganisms8111781. [PMID: 33202910 PMCID: PMC7697855 DOI: 10.3390/microorganisms8111781] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2020] [Revised: 11/09/2020] [Accepted: 11/11/2020] [Indexed: 12/28/2022] Open
Abstract
Animals and plants host diverse communities of microorganisms, and these microbiotas have been shown to influence host life history traits. Much has been said about the benefits that host-associated microbiotas bestow on the host. However, life history traits often demonstrate tradeoffs among one another. Raising Caenorhabditis elegans nematodes in compost microcosms emulating their natural environment, we examined how complex microbiotas affect host life history traits. We show that soil microbes usually increase the host development rate but decrease host resistance to heat stress, suggesting that interactions with complex microbiotas may mediate a tradeoff between host development and stress resistance. What element in these interactions is responsible for these effects is yet unknown, but experiments with live versus dead bacteria suggest that such effects may depend on bacterially provided signals.
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Affiliation(s)
- Samuel Slowinski
- Department of Integrative Biology, 3040 Valley Life Sciences Building, University of California, Berkeley, CA 94720-3140, USA; (I.R.); (V.N.); (M.S.); (M.P.); (S.P.); (N.J.); (S.K.); (B.P.)
- Department of Biology, 4223 Biology-Psychology Bldg., University of Maryland, College Park, MD 20742, USA
- Correspondence: (S.S.); (M.S.)
| | - Isabella Ramirez
- Department of Integrative Biology, 3040 Valley Life Sciences Building, University of California, Berkeley, CA 94720-3140, USA; (I.R.); (V.N.); (M.S.); (M.P.); (S.P.); (N.J.); (S.K.); (B.P.)
| | - Vivek Narayan
- Department of Integrative Biology, 3040 Valley Life Sciences Building, University of California, Berkeley, CA 94720-3140, USA; (I.R.); (V.N.); (M.S.); (M.P.); (S.P.); (N.J.); (S.K.); (B.P.)
| | - Medha Somayaji
- Department of Integrative Biology, 3040 Valley Life Sciences Building, University of California, Berkeley, CA 94720-3140, USA; (I.R.); (V.N.); (M.S.); (M.P.); (S.P.); (N.J.); (S.K.); (B.P.)
| | - Maya Para
- Department of Integrative Biology, 3040 Valley Life Sciences Building, University of California, Berkeley, CA 94720-3140, USA; (I.R.); (V.N.); (M.S.); (M.P.); (S.P.); (N.J.); (S.K.); (B.P.)
| | - Sarah Pi
- Department of Integrative Biology, 3040 Valley Life Sciences Building, University of California, Berkeley, CA 94720-3140, USA; (I.R.); (V.N.); (M.S.); (M.P.); (S.P.); (N.J.); (S.K.); (B.P.)
| | - Niharika Jadeja
- Department of Integrative Biology, 3040 Valley Life Sciences Building, University of California, Berkeley, CA 94720-3140, USA; (I.R.); (V.N.); (M.S.); (M.P.); (S.P.); (N.J.); (S.K.); (B.P.)
| | - Siavash Karimzadegan
- Department of Integrative Biology, 3040 Valley Life Sciences Building, University of California, Berkeley, CA 94720-3140, USA; (I.R.); (V.N.); (M.S.); (M.P.); (S.P.); (N.J.); (S.K.); (B.P.)
| | - Barbara Pees
- Department of Integrative Biology, 3040 Valley Life Sciences Building, University of California, Berkeley, CA 94720-3140, USA; (I.R.); (V.N.); (M.S.); (M.P.); (S.P.); (N.J.); (S.K.); (B.P.)
| | - Michael Shapira
- Department of Integrative Biology, 3040 Valley Life Sciences Building, University of California, Berkeley, CA 94720-3140, USA; (I.R.); (V.N.); (M.S.); (M.P.); (S.P.); (N.J.); (S.K.); (B.P.)
- Correspondence: (S.S.); (M.S.)
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Grenier T, Leulier F. How commensal microbes shape the physiology of Drosophila melanogaster. CURRENT OPINION IN INSECT SCIENCE 2020; 41:92-99. [PMID: 32836177 DOI: 10.1016/j.cois.2020.08.002] [Citation(s) in RCA: 25] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/30/2020] [Revised: 08/04/2020] [Accepted: 08/05/2020] [Indexed: 06/11/2023]
Abstract
The interactions between animals and their commensal microbes profoundly influence the host's physiology. In the last decade, Drosophila melanogaster has been extensively used as a model to study host-commensal microbes interactions. Here, we review the most recent advances in this field. We focus on studies that extend our understanding of the molecular mechanisms underlying the effects of commensal microbes on Drosophila's development and lifespan. We emphasize how commensal microbes influence nutrition and the intestinal epithelium homeostasis; how they elicit immune tolerance mechanisms and how these physiological processes are interconnected. Finally, we discuss the importance of diets and microbial strains and show how they can be confounding factors of microbe mediated host phenotypes.
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Affiliation(s)
- Theodore Grenier
- Univ Lyon, Institut de Génomique Fonctionnelle de Lyon, Ecole Normale Supérieure de Lyon, Université Claude Bernard Lyon 1, CNRS UMR5242, 46, allée d'Italie, 69007, Lyon, France
| | - François Leulier
- Univ Lyon, Institut de Génomique Fonctionnelle de Lyon, Ecole Normale Supérieure de Lyon, Université Claude Bernard Lyon 1, CNRS UMR5242, 46, allée d'Italie, 69007, Lyon, France.
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Kapun M, Barrón MG, Staubach F, Obbard DJ, Wiberg RAW, Vieira J, Goubert C, Rota-Stabelli O, Kankare M, Bogaerts-Márquez M, Haudry A, Waidele L, Kozeretska I, Pasyukova EG, Loeschcke V, Pascual M, Vieira CP, Serga S, Montchamp-Moreau C, Abbott J, Gibert P, Porcelli D, Posnien N, Sánchez-Gracia A, Grath S, Sucena É, Bergland AO, Guerreiro MPG, Onder BS, Argyridou E, Guio L, Schou MF, Deplancke B, Vieira C, Ritchie MG, Zwaan BJ, Tauber E, Orengo DJ, Puerma E, Aguadé M, Schmidt P, Parsch J, Betancourt AJ, Flatt T, González J. Genomic Analysis of European Drosophila melanogaster Populations Reveals Longitudinal Structure, Continent-Wide Selection, and Previously Unknown DNA Viruses. Mol Biol Evol 2020; 37:2661-2678. [PMID: 32413142 PMCID: PMC7475034 DOI: 10.1093/molbev/msaa120] [Citation(s) in RCA: 63] [Impact Index Per Article: 15.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022] Open
Abstract
Genetic variation is the fuel of evolution, with standing genetic variation especially important for short-term evolution and local adaptation. To date, studies of spatiotemporal patterns of genetic variation in natural populations have been challenging, as comprehensive sampling is logistically difficult, and sequencing of entire populations costly. Here, we address these issues using a collaborative approach, sequencing 48 pooled population samples from 32 locations, and perform the first continent-wide genomic analysis of genetic variation in European Drosophila melanogaster. Our analyses uncover longitudinal population structure, provide evidence for continent-wide selective sweeps, identify candidate genes for local climate adaptation, and document clines in chromosomal inversion and transposable element frequencies. We also characterize variation among populations in the composition of the fly microbiome, and identify five new DNA viruses in our samples.
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Affiliation(s)
- Martin Kapun
- The European Drosophila Population Genomics Consortium (DrosEU)
- Department of Ecology and Evolution, University of Lausanne, Lausanne, Switzerland
- Department of Biology, University of Fribourg, Fribourg, Switzerland
- Department of Evolutionary Biology and Environmental Sciences, University of Zürich, Zürich, Switzerland
- Division of Cell and Developmental Biology, Medical University of Vienna, Vienna, Austria
| | - Maite G Barrón
- The European Drosophila Population Genomics Consortium (DrosEU)
- Institute of Evolutionary Biology, CSIC-Universitat Pompeu Fabra, Barcelona, Spain
| | - Fabian Staubach
- The European Drosophila Population Genomics Consortium (DrosEU)
- Department of Evolutionary Biology and Ecology, University of Freiburg, Freiburg, Germany
| | - Darren J Obbard
- The European Drosophila Population Genomics Consortium (DrosEU)
- Institute of Evolutionary Biology, University of Edinburgh, Edinburgh, United Kingdom
| | - R Axel W Wiberg
- The European Drosophila Population Genomics Consortium (DrosEU)
- Centre for Biological Diversity, School of Biology, University of St. Andrews, St Andrews, Scotland
- Department of Environmental Sciences, Zoological Institute, University of Basel, Basel, Switzerland
| | - Jorge Vieira
- The European Drosophila Population Genomics Consortium (DrosEU)
- Instituto de Biologia Molecular e Celular (IBMC), University of Porto, Porto, Portugal
- Instituto de Investigação e Inovação em Saúde (I3S), University of Porto, Porto, Portugal
| | - Clément Goubert
- The European Drosophila Population Genomics Consortium (DrosEU)
- Laboratoire de Biométrie et Biologie Evolutive UMR 5558, CNRS, Université Lyon 1, Université de Lyon, Villeurbanne, France
- Department of Molecular Biology and Genetics, Cornell University, Ithaca, NY
| | - Omar Rota-Stabelli
- The European Drosophila Population Genomics Consortium (DrosEU)
- Research and Innovation Centre, Fondazione Edmund Mach, San Michele all’ Adige, Italy
| | - Maaria Kankare
- The European Drosophila Population Genomics Consortium (DrosEU)
- Department of Biological and Environmental Science, University of Jyväskylä, Jyväskylä, Finland
| | - María Bogaerts-Márquez
- The European Drosophila Population Genomics Consortium (DrosEU)
- Institute of Evolutionary Biology, CSIC-Universitat Pompeu Fabra, Barcelona, Spain
| | - Annabelle Haudry
- The European Drosophila Population Genomics Consortium (DrosEU)
- Laboratoire de Biométrie et Biologie Evolutive UMR 5558, CNRS, Université Lyon 1, Université de Lyon, Villeurbanne, France
| | - Lena Waidele
- The European Drosophila Population Genomics Consortium (DrosEU)
- Department of Evolutionary Biology and Ecology, University of Freiburg, Freiburg, Germany
| | - Iryna Kozeretska
- The European Drosophila Population Genomics Consortium (DrosEU)
- General and Medical Genetics Department, Taras Shevchenko National University of Kyiv, Kyiv, Ukraine
- State Institution National Antarctic Scientific Center of Ministry of Education and Science of Ukraine, Kyiv, Ukraine
| | - Elena G Pasyukova
- The European Drosophila Population Genomics Consortium (DrosEU)
- Laboratory of Genome Variation, Institute of Molecular Genetics of RAS, Moscow, Russia
| | - Volker Loeschcke
- The European Drosophila Population Genomics Consortium (DrosEU)
- Department of Bioscience—Genetics, Ecology and Evolution, Aarhus University, Aarhus C, Denmark
| | - Marta Pascual
- The European Drosophila Population Genomics Consortium (DrosEU)
- Departament de Genètica, Microbiologia i Estadística, Facultat de Biologia, Universitat de Barcelona, Barcelona, Spain
- Institut de Recerca de la Biodiversitat (IRBio), Universitat de Barcelona, Barcelona, Spain
| | - Cristina P Vieira
- The European Drosophila Population Genomics Consortium (DrosEU)
- Instituto de Biologia Molecular e Celular (IBMC), University of Porto, Porto, Portugal
- Instituto de Investigação e Inovação em Saúde (I3S), University of Porto, Porto, Portugal
| | - Svitlana Serga
- The European Drosophila Population Genomics Consortium (DrosEU)
- General and Medical Genetics Department, Taras Shevchenko National University of Kyiv, Kyiv, Ukraine
| | - Catherine Montchamp-Moreau
- The European Drosophila Population Genomics Consortium (DrosEU)
- Université Paris-Saclay, CNRS, IRD, UMR Évolution, Génomes, Comportement et Écologie, 91198, Gif-sur-Yvette, France
| | - Jessica Abbott
- The European Drosophila Population Genomics Consortium (DrosEU)
- Section for Evolutionary Ecology, Department of Biology, Lund University, Lund, Sweden
| | - Patricia Gibert
- The European Drosophila Population Genomics Consortium (DrosEU)
- Laboratoire de Biométrie et Biologie Evolutive UMR 5558, CNRS, Université Lyon 1, Université de Lyon, Villeurbanne, France
| | - Damiano Porcelli
- The European Drosophila Population Genomics Consortium (DrosEU)
- Department of Animal and Plant Sciences, Sheffield, United Kingdom
| | - Nico Posnien
- The European Drosophila Population Genomics Consortium (DrosEU)
- Johann-Friedrich-Blumenbach-Institut für Zoologie und Anthropologie, Universität Göttingen, Göttingen, Germany
| | - Alejandro Sánchez-Gracia
- The European Drosophila Population Genomics Consortium (DrosEU)
- Departament de Genètica, Microbiologia i Estadística, Facultat de Biologia, Universitat de Barcelona, Barcelona, Spain
- Institut de Recerca de la Biodiversitat (IRBio), Universitat de Barcelona, Barcelona, Spain
| | - Sonja Grath
- The European Drosophila Population Genomics Consortium (DrosEU)
- Division of Evolutionary Biology, Faculty of Biology, Ludwig-Maximilians-Universität München, Planegg, Germany
| | - Élio Sucena
- The European Drosophila Population Genomics Consortium (DrosEU)
- Instituto Gulbenkian de Ciência, Oeiras, Portugal
- Departamento de Biologia Animal, Faculdade de Ciências da Universidade de Lisboa, Lisboa, Portugal
| | - Alan O Bergland
- The European Drosophila Population Genomics Consortium (DrosEU)
- Department of Biology, University of Virginia, Charlottesville, VA
| | - Maria Pilar Garcia Guerreiro
- The European Drosophila Population Genomics Consortium (DrosEU)
- Departament de Genètica i Microbiologia, Universitat Autònoma de Barcelona, Barcelona, Spain
| | - Banu Sebnem Onder
- The European Drosophila Population Genomics Consortium (DrosEU)
- Department of Biology, Faculty of Science, Hacettepe University, Ankara, Turkey
| | - Eliza Argyridou
- The European Drosophila Population Genomics Consortium (DrosEU)
- Division of Evolutionary Biology, Faculty of Biology, Ludwig-Maximilians-Universität München, Planegg, Germany
| | - Lain Guio
- The European Drosophila Population Genomics Consortium (DrosEU)
- Institute of Evolutionary Biology, CSIC-Universitat Pompeu Fabra, Barcelona, Spain
| | - Mads Fristrup Schou
- The European Drosophila Population Genomics Consortium (DrosEU)
- Department of Bioscience—Genetics, Ecology and Evolution, Aarhus University, Aarhus C, Denmark
- Section for Evolutionary Ecology, Department of Biology, Lund University, Lund, Sweden
| | - Bart Deplancke
- The European Drosophila Population Genomics Consortium (DrosEU)
- Institute of Bio-engineering, School of Life Sciences, EPFL, Lausanne, Switzerland
| | - Cristina Vieira
- The European Drosophila Population Genomics Consortium (DrosEU)
- Laboratoire de Biométrie et Biologie Evolutive UMR 5558, CNRS, Université Lyon 1, Université de Lyon, Villeurbanne, France
| | - Michael G Ritchie
- The European Drosophila Population Genomics Consortium (DrosEU)
- Centre for Biological Diversity, School of Biology, University of St. Andrews, St Andrews, Scotland
| | - Bas J Zwaan
- The European Drosophila Population Genomics Consortium (DrosEU)
- Laboratory of Genetics, Department of Plant Sciences, Wageningen University, Wageningen, Netherlands
| | - Eran Tauber
- The European Drosophila Population Genomics Consortium (DrosEU)
- Department of Evolutionary and Environmental Biology, University of Haifa, Haifa, Israel
- Institute of Evolution, University of Haifa, Haifa, Israel
| | - Dorcas J Orengo
- The European Drosophila Population Genomics Consortium (DrosEU)
- Departament de Genètica, Microbiologia i Estadística, Facultat de Biologia, Universitat de Barcelona, Barcelona, Spain
- Institut de Recerca de la Biodiversitat (IRBio), Universitat de Barcelona, Barcelona, Spain
| | - Eva Puerma
- The European Drosophila Population Genomics Consortium (DrosEU)
- Departament de Genètica, Microbiologia i Estadística, Facultat de Biologia, Universitat de Barcelona, Barcelona, Spain
- Institut de Recerca de la Biodiversitat (IRBio), Universitat de Barcelona, Barcelona, Spain
| | - Montserrat Aguadé
- The European Drosophila Population Genomics Consortium (DrosEU)
- Departament de Genètica, Microbiologia i Estadística, Facultat de Biologia, Universitat de Barcelona, Barcelona, Spain
- Institut de Recerca de la Biodiversitat (IRBio), Universitat de Barcelona, Barcelona, Spain
| | - Paul Schmidt
- The European Drosophila Population Genomics Consortium (DrosEU)
- Department of Biology, University of Pennsylvania, Philadelphia, PA
| | - John Parsch
- The European Drosophila Population Genomics Consortium (DrosEU)
- Division of Evolutionary Biology, Faculty of Biology, Ludwig-Maximilians-Universität München, Planegg, Germany
| | - Andrea J Betancourt
- The European Drosophila Population Genomics Consortium (DrosEU)
- Department of Evolution, Ecology, and Behaviour, University of Liverpool, Liverpool, United Kingdom
| | - Thomas Flatt
- The European Drosophila Population Genomics Consortium (DrosEU)
- Department of Ecology and Evolution, University of Lausanne, Lausanne, Switzerland
- Department of Biology, University of Fribourg, Fribourg, Switzerland
| | - Josefa González
- The European Drosophila Population Genomics Consortium (DrosEU)
- Institute of Evolutionary Biology, CSIC-Universitat Pompeu Fabra, Barcelona, Spain
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Mitochondria, the gut microbiome and ROS. Cell Signal 2020; 75:109737. [PMID: 32810578 DOI: 10.1016/j.cellsig.2020.109737] [Citation(s) in RCA: 61] [Impact Index Per Article: 15.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2020] [Revised: 08/11/2020] [Accepted: 08/11/2020] [Indexed: 12/11/2022]
Abstract
In this review, we discuss the connections between mitochondria and the gut microbiome provided by reactive oxygen species (ROS). We examine the mitochondrion as an endosymbiotic organelle that is a hub for energy production, signaling, and cell homeostasis. Maintaining a diverse gut microbiome is generally associated with organismal fitness, intestinal health and resistance to environmental stress. In contrast, gut microbiome imbalance, termed dysbiosis, is linked to a reduction in organismal well-being. ROS are essential signaling molecules but can be damaging when present in excess. Increasing ROS levels have been shown to influence human health, homeostasis of gut cells, and the gastrointestinal microbial community's biodiversity. Reciprocally, gut microbes can affect ROS levels, mitochondrial homeostasis, and host health. We propose that mechanistic understanding of the suite of bi-directional interactions between mitochondria and the gut microbiome will facilitate innovative interdisciplinary studies examining evolutionary divergence and provide novel treatments and therapeutics for disease. GLOSS: In this review, we focus on the nexus between mitochondria and the gut microbiome provided by reactive oxygen species (ROS). Mitochondria are a cell organelle that is derived from an ancestral alpha-proteobacteria. They generate around 80% of the adenosine triphosphate that an organism needs to function and release a range of signaling molecules essential for cellular homeostasis. The gut microbiome is a suite of microorganisms that are commensal, symbiotic and pathogenic to their host. ROS are one predominant group of essential signaling molecules that can be harmful in excess. We suggest that the mitochondria- microbiome nexus is a frontier of research that has cross-disciplinary benefits in understanding genetic divergence and human well-being.
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Genetic Influences of the Microbiota on the Life Span of Drosophila melanogaster. Appl Environ Microbiol 2020; 86:AEM.00305-20. [PMID: 32144104 DOI: 10.1128/aem.00305-20] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2020] [Accepted: 03/01/2020] [Indexed: 12/14/2022] Open
Abstract
To better understand how associated microorganisms ("microbiota") influence organismal aging, we focused on the model organism Drosophila melanogaster We conducted a metagenome-wide association (MGWA) as a screen to identify bacterial genes associated with variation in the D. melanogaster life span. The results of the MGWA predicted that bacterial cysteine and methionine metabolism genes influence fruit fly longevity. A mutant analysis, in which flies were inoculated with Escherichia coli strains bearing mutations in various methionine cycle genes, confirmed a role for some methionine cycle genes in extending or shortening fruit fly life span. Initially, we predicted these genes might influence longevity by mimicking or opposing methionine restriction, an established mechanism for life span extension in fruit flies. However, follow-up transcriptome sequencing (RNA-seq) and metabolomic experiments were generally inconsistent with this conclusion and instead implicated glucose and vitamin B6 metabolism in these influences. We then tested if bacteria could influence life span through methionine restriction using a different set of bacterial strains. Flies reared with a bacterial strain that ectopically expressed bacterial transsulfuration genes and lowered the methionine content of the fly diet also extended female D. melanogaster life span. Taken together, the microbial influences shown here overlap with established host genetic mechanisms for aging and therefore suggest overlapping roles for host and microbial metabolism genes in organismal aging.IMPORTANCE Associated microorganisms ("microbiota") are intimately connected to the behavior and physiology of their animal hosts, and defining the mechanisms of these interactions is an urgent imperative. This study focuses on how microorganisms influence the life span of a model host, the fruit fly Drosophila melanogaster First, we performed a screen that suggested a strong influence of bacterial methionine metabolism on host life span. Follow-up analyses of gene expression and metabolite abundance identified stronger roles for vitamin B6 and glucose than methionine metabolism among the tested mutants, possibly suggesting a more limited role for bacterial methionine metabolism genes in host life span effects. In a parallel set of experiments, we created a distinct bacterial strain that expressed life span-extending methionine metabolism genes and showed that this strain can extend fly life span. Therefore, this work identifies specific bacterial genes that influence host life span, including in ways that are consistent with the expectations of methionine restriction.
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Wang Y, Kapun M, Waidele L, Kuenzel S, Bergland AO, Staubach F. Common structuring principles of the Drosophila melanogaster microbiome on a continental scale and between host and substrate. ENVIRONMENTAL MICROBIOLOGY REPORTS 2020; 12:220-228. [PMID: 32003146 DOI: 10.1111/1758-2229.12826] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/01/2019] [Revised: 01/21/2020] [Accepted: 01/27/2020] [Indexed: 05/26/2023]
Abstract
The relative importance of host control, environmental effects and stochasticity in the assemblage of host-associated microbiomes is being debated. We analysed the microbiome among fly populations that were sampled across Europe by the European Drosophila Population Genomics Consortium (DrosEU). In order to better understand the structuring principles of the natural D. melanogaster microbiome, we combined environmental data on climate and food-substrate with dense genomic data on host populations and microbiome profiling. Food-substrate, temperature, and host population structure correlated with microbiome structure. Microbes, whose abundance was co-structured with host populations, also differed in abundance between flies and their substrate in an independent survey. This finding suggests common, host-related structuring principles of the microbiome on different spatial scales.
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Affiliation(s)
- Yun Wang
- The European Drosophila Population Genomics Consortium (DrosEU)
- Department of Evolutionary Biology and Animal Ecology, Biology I, University of Freiburg, Freiburg im Breisgau, Germany
| | - Martin Kapun
- The European Drosophila Population Genomics Consortium (DrosEU)
- Department of Evolutionary Biology and Environmental Studies, University of Zürich, Zürich, Switzerland
- Department of Cell and Developmental Biology, Medical University of Vienna, Vienna, Austria
| | - Lena Waidele
- The European Drosophila Population Genomics Consortium (DrosEU)
- Department of Evolutionary Biology and Animal Ecology, Biology I, University of Freiburg, Freiburg im Breisgau, Germany
| | - Sven Kuenzel
- Max Planck Institute for Evolutionary Biology, Plön, Germany
| | - Alan O Bergland
- The European Drosophila Population Genomics Consortium (DrosEU)
- Department of Biology, University of Virginia, Charlottesville, VA, USA
| | - Fabian Staubach
- The European Drosophila Population Genomics Consortium (DrosEU)
- Department of Evolutionary Biology and Animal Ecology, Biology I, University of Freiburg, Freiburg im Breisgau, Germany
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Sepulveda J, Moeller AH. The Effects of Temperature on Animal Gut Microbiomes. Front Microbiol 2020; 11:384. [PMID: 32210948 PMCID: PMC7076155 DOI: 10.3389/fmicb.2020.00384] [Citation(s) in RCA: 107] [Impact Index Per Article: 26.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2019] [Accepted: 02/20/2020] [Indexed: 12/26/2022] Open
Abstract
Temperature is a prominent abiotic environmental variable that drives the adaptive trajectories of animal lineages and structures the composition of animal communities. Global temperature regimes are expected to undergo rapid shifts in the next century, yet for many animal taxa we lack an understanding of the consequences of these predicted shifts for animal populations. In this review, we synthesize recent evidence that temperature variation shapes the composition and function of animal gut microbiomes, key regulators of host physiology, with potential consequences for host population responses to climate change. Several recent studies spanning a range of animal taxa, including Chordata, Arthropoda, and Mollusca, have reported repeatable associations between temperature and the community composition and function of the gut microbiome. In several cases, the same microbiome responses to temperature have been observed across distantly related animal taxa, suggesting the existence of conserved mechanisms underlying temperature-induced microbiome plasticity. Extreme temperatures can disrupt the stability of alpha-diversity within the gut microbiomes individual hosts and generate beta-diversity among microbiomes within host populations. Microbiome states resulting from extreme temperatures have been associated, and in some cases causally linked, with both beneficial and deleterious effects on host phenotypes. We propose routes by which temperature-induced changes in the gut microbiome may impact host fitness, including effects on colonization resistance in the gut, on host energy and nutrient assimilation, and on host life history traits. Cumulatively, available data indicate that disruption of the gut microbiome may be a mechanism by which changing temperatures will impact animal fitness in wild-living populations.
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Affiliation(s)
- Juan Sepulveda
- Department of Ecology and Evolutionary Biology, Cornell University, Ithaca, NY, United States
| | - Andrew H Moeller
- Department of Ecology and Evolutionary Biology, Cornell University, Ithaca, NY, United States
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Walters AW, Hughes RC, Call TB, Walker CJ, Wilcox H, Petersen SC, Rudman SM, Newell PD, Douglas AE, Schmidt PS, Chaston JM. The microbiota influences the Drosophila melanogaster life history strategy. Mol Ecol 2020; 29:639-653. [PMID: 31863671 DOI: 10.1111/mec.15344] [Citation(s) in RCA: 44] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2019] [Revised: 12/03/2019] [Accepted: 12/16/2019] [Indexed: 12/17/2022]
Abstract
Organisms are locally adapted when members of a population have a fitness advantage in one location relative to conspecifics in other geographies. For example, across latitudinal gradients, some organisms may trade off between traits that maximize fitness components in one, but not both, of somatic maintenance or reproductive output. Latitudinal gradients in life history strategies are traditionally attributed to environmental selection on an animal's genotype, without any consideration of the possible impact of associated microorganisms ("microbiota") on life history traits. Here, we show in Drosophila melanogaster, a key model for studying local adaptation and life history strategy, that excluding the microbiota from definitions of local adaptation is a major shortfall. First, we reveal that an isogenic fly line reared with different bacteria varies the investment in early reproduction versus somatic maintenance. Next, we show that in wild fruit flies, the abundance of these same bacteria was correlated with the latitude and life history strategy of the flies, suggesting geographic specificity of the microbiota composition. Variation in microbiota composition of locally adapted D. melanogaster could be attributed to both the wild environment and host genetic selection. Finally, by eliminating or manipulating the microbiota of fly lines collected across a latitudinal gradient, we reveal that host genotype contributes to latitude-specific life history traits independent of the microbiota and that variation in the microbiota can suppress or reverse the differences between locally adapted fly lines. Together, these findings establish the microbiota composition of a model animal as an essential consideration in local adaptation.
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Affiliation(s)
- Amber W Walters
- Department of Plant and Wildlife Sciences, Brigham Young University, Provo, UT, USA
| | - Rachel C Hughes
- Department of Plant and Wildlife Sciences, Brigham Young University, Provo, UT, USA
| | - Tanner B Call
- Department of Plant and Wildlife Sciences, Brigham Young University, Provo, UT, USA
| | - Carson J Walker
- Department of Plant and Wildlife Sciences, Brigham Young University, Provo, UT, USA
| | - Hailey Wilcox
- Department of Plant and Wildlife Sciences, Brigham Young University, Provo, UT, USA
| | - Samara C Petersen
- Department of Plant and Wildlife Sciences, Brigham Young University, Provo, UT, USA
| | - Seth M Rudman
- Department of Biology, University of Pennsylvania, Philadelphia, PA, USA
| | - Peter D Newell
- Department of Biological Sciences, SUNY Oswego, Oswego, NY, USA
| | - Angela E Douglas
- Department of Entomology and Department of Molecular Biology and Genetics, Cornell University, Ithaca, NY, USA
| | - Paul S Schmidt
- Department of Biology, University of Pennsylvania, Philadelphia, PA, USA
| | - John M Chaston
- Department of Plant and Wildlife Sciences, Brigham Young University, Provo, UT, USA
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Rennison DJ, Rudman SM, Schluter D. Parallel changes in gut microbiome composition and function during colonization, local adaptation and ecological speciation. Proc Biol Sci 2019; 286:20191911. [PMID: 31795865 DOI: 10.1098/rspb.2019.1911] [Citation(s) in RCA: 29] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023] Open
Abstract
The processes of local adaptation and ecological speciation are often strongly shaped by biotic interactions such as competition and predation. One of the strongest lines of evidence that biotic interactions drive evolution comes from the repeated divergence of lineages in association with repeated changes in the community of interacting species. Yet relatively little is known about the repeatability of changes in gut microbial communities and their role in adaptation and divergence of host populations in nature. Here we use three cases of rapid, parallel adaptation and speciation in freshwater threespine stickleback to test for parallel changes in associated gut microbiomes. We find that features of the gut microbial communities have shifted repeatedly in the same direction in association with parallel divergence and speciation of stickleback hosts. These results suggest that changes to gut microbiomes can occur rapidly and predictably in conjunction with host evolution, and that host-microbe interactions might play an important role in host adaptation and diversification.
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Affiliation(s)
- Diana J Rennison
- Department of Zoology and Biodiversity Research Centre, University of British Columbia, Vancouver, British Columbia, Canada
| | - Seth M Rudman
- Department of Zoology and Biodiversity Research Centre, University of British Columbia, Vancouver, British Columbia, Canada
| | - Dolph Schluter
- Department of Zoology and Biodiversity Research Centre, University of British Columbia, Vancouver, British Columbia, Canada
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45
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Abstract
The timing of life history events has important fitness consequences. Since the 1950s, researchers have combined first principles and data to predict the optimal timing of life history transitions. Recently, a striking mystery has emerged. Such transitions can be shaped by a completely different branch of the tree of life: species in the microbiome. The timing of life history events has important fitness consequences. Since the 1950s, researchers have combined first principles and data to predict the optimal timing of life history transitions. Recently, a striking mystery has emerged. Such transitions can be shaped by a completely different branch of the tree of life: species in the microbiome. Probing these interactions using testable predictions from evolutionary theory could illuminate whether and how host-microbiome integrated life histories can evolve and be maintained. Beyond advancing fundamental science, this research program could yield important applications. In an age of microbiome engineering, understanding the contexts that lead to microbiota signaling shaping ontogeny could offer novel mechanisms for manipulations to increase yield in agriculture by manipulating plant responses to stressful environments, or to reduce pathogen transmission by affecting vector efficiency. We combine theory and evidence to illuminate the essential questions underlying the existence of microbiome-dependent ontogenetic timing (MiDOT) to fuel research on this emerging topic.
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