How do invasive pests affect interactions between members of pre-existing agrosystems? The pest Drosophila suzukii is suspected to be involved in the aetiology sour rot, a grapevine disease that otherwise develops following melanogaster infestation wounded berries. We combined field observations with laboratory assays disentangle relative roles both development. observed emergence numerous D. , but no flies, from bunches started showing mild rot symptoms days after collection. However,...

Sexually transmitted symbionts can substantially affect the performance and evolution of their hosts. From a pest control perspective, sexually microorganisms insects be considered powerful biological agents or probiotics. The sterile insect technique (SIT) is currently being developed as new tool to Drosophila suzukii , major crop pest. With considerable numbers mass-reared released mate with wild individuals, understanding how microbiota transfers between adult necessary not only improve...

Understanding the ecological and evolutionary dynamics of host-microbiota associations notably involves exploring how members microbiota assemble whether they are transmitted along host generations. Here, we investigate larval acquisition facultative bacterial yeast symbionts Drosophila melanogaster suzukii in ecologically realistic setups. Fly mothers fruit were major sources symbionts. Microorganisms associated with adult males also contributed to microbiota, mostly D. melanogaster. Yeasts...

Both local adaptation and adaptive phenotypic plasticity can influence the match between traits environmental conditions. Theory predicts that environments stable for multiple generations promote adaptation, whereas highly heterogeneous favor plasticity. However, when have periods of stability mixed with heterogeneity, relative importance is unclear. Here, we used Drosophila suzukii as a model system to evaluate genetic plastic effects on populations from three four generations. This...

1. Insect herbivores choose their food according to its protein carbohydrate ratio, but the reasons why different species have contrasting intake targets remain unclear. According growth rate hypothesis, P ‐rich insects higher rates. It is therefore expected that will prefer plants are high in (hence nitrogen, N ) and phosphorus ( ). 2. To test this ecological stoichiometry interaction network frameworks were combined. The preferences of 24 plant by 23 grasshopper determined, contents both...

Floral scent is an important trait in plant–pollinator interactions. It not only varies among plant species but also populations within species. Such variability might be caused by various non–selective factors, or, as has been shown some instances, the result of divergent selective pressures exerted variable pollinator climates. Cypripedium calceolus a Eurasian deceptive orchid pollinated mainly bees, which spans wide altitudinal and latitudinal gradients quite isolated populations. In...

The influence of microbiota in ecological interactions, and particular competition, is poorly known. We studied competition between two insect species, the invasive pest Drosophila suzukii model melanogaster, whose larval niches overlap ripe, but not rotten, fruit.We discovered D. females prevent costly interspecific by avoiding oviposition on substrates previously visited melanogaster. More precisely, melanogaster association with gut bacteria genus Lactobacillus triggered avoidance....

Abstract Interactions between microorganisms associated with metazoan hosts are emerging as key features of symbiotic systems. Little is known about the role such interactions on maintenance host-microorganism association throughout host’s life cycle. We studied influence extracellular bacteria a wild isolate yeast Saccharomyces cerevisiae through metamorphosis fly Drosophila melanogaster reared in fruit. Yeasts maintained only when larvae were isolated from D. faeces. One these isolates, an...

Drosophila suzukii (Matsumura, 1931), the spotted-wing drosophila, is a highly invasive fruit fly that spread from Southern Asia across most regions of and, in last 15 years, has invaded Europe and Americas. It an economically important pest small fruits such as berries stone fruits. speciated by adapting to cooler, mountainous, forest environments. In temperate regions, it evolved seasonal polyphenism traits which enhanced its survival during stressful winter population bottlenecks....

ABSTRACT Environmentally acquired microbial symbionts could contribute to host adaptation local conditions like vertically transmitted do. This scenario necessitates have different effects in environments. We investigated this idea Drosophila melanogaster , a species which communities of bacterial vary greatly among isolated four strains from the feces D. laboratory strain and tested their two conditions: ancestral environment (i.e. medium) new fresh fruit with live yeast). All on larval...

Abstract Interactions between microbial symbionts of metazoan hosts are emerging as key features symbiotic systems. Little is known about the role such interactions on maintenance symbiosis through host’s life cycle. We studied influence bacteria yeast metamorphosis fly Drosophila melanogaster . To this end we mimicked development larvae in natural fruit. In absence was never found young adults. However, could maintain when were inoculated with isolated from D. faeces. Furthermore, an...

Abstract Both local adaptation and adaptive phenotypic plasticity can influence the match between traits environmental conditions. Theory predicts that environments stable for multiple generations promote adaptation, while highly heterogeneous favor plasticity. However, when have periods of stability mixed with heterogeneity, relative importance is unclear. Here, we used Drosophila suzukii as a model system to evaluate genetic plastic effects on populations from three four generations. This...

Abstract Many symbionts provide nutrients to their host and/or affect its phenotypic plasticity. Such symbiont effects on resource acquisition and allocation are often simultaneous difficult disentangle. Here we partitioned using a new framework based the analysis of well-established trade-off between fitness components. This was used analyze effect symbiotic yeast larval development Drosophila larvae in field-realistic conditions. The screening eighteen fresh isolates showed they had...

Interactions between microbial symbionts influence their demography and that of hosts. Taylor’s power law (TL)–a well-established relationship population size mean variance across space time–may help to unveil the factors processes determine symbiont multiplications. Recent studies suggest pervasive interactions in Drosophila melanogaster . We used this system investigate theoretical predictions regarding effects interspecific on TL parameters. assayed twenty natural strains bacteria...

A recommendation of: Robin Guilhot, Antoine Rombaut, Anne Xuéreb, Kate Howell, Simon Fellous Environmental specificity in Drosophila-bacteria symbiosis affects host developmental plasticity https://doi.org/10.1101/717702

Abstract Little is known on the origin and maintenance of symbionts associated with Drosophila larvae in natura , which restricts understanding -extracellular microorganism symbiosis light evolution. Here, we studied under ecologically realistic conditions, to our knowledge for first time, using yeast bacterial isolates two species: model organism D. melanogaster invasive pest suzukii . We discovered that females males both transmit bacteria larvae. In addition, several symbiotic yeasts...

Abstract The broad variation in host use among polyphagous insects is well documented but still poorly understood. In numerous pest insects, the proximate mechanisms responsible for oviposition preference plants remain to be elucidated. invasive crop pest, Drosophila suzukii , attacks a wide range of fruits. Females prefer ovipositing on particular fruit media (blackberry, cherry, blackcurrant) that are rich phosphorus. As phosphorus known involved female reproduction insect species such as...