Nutrient-Dependent Impact of Microbes on <italic toggle="yes">Drosophila suzukii</italic> Development

ABSTRACT Drosophila suzukii Matsumura is an invasive species of vinegar fly that has become a prominent pest of berries and other soft-skinned fruits. Unlike most other Drosophila species, female D. suzukii flies lay their eggs in ripening and ripe fruits and larvae develop within the fruit. To unde...

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Autores principales:	XiaoLi Bing, Joseph Gerlach, Gregory Loeb, Nicolas Buchon
Formato:	article
Lenguaje:	EN
Publicado:	American Society for Microbiology 2018
Materias:	Drosophila suzukii TOR development fruit insulin pathway larval growth Microbiology QR1-502
Acceso en línea:	https://doaj.org/article/afe809df48bc44a384e8d23d03606f46
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spelling	oai:doaj.org-article:afe809df48bc44a384e8d23d03606f462021-11-15T15:53:26ZNutrient-Dependent Impact of Microbes on <italic toggle="yes">Drosophila suzukii</italic> Development10.1128/mBio.02199-172150-7511https://doaj.org/article/afe809df48bc44a384e8d23d03606f462018-05-01T00:00:00Zhttps://journals.asm.org/doi/10.1128/mBio.02199-17https://doaj.org/toc/2150-7511ABSTRACT Drosophila suzukii Matsumura is an invasive species of vinegar fly that has become a prominent pest of berries and other soft-skinned fruits. Unlike most other Drosophila species, female D. suzukii flies lay their eggs in ripening and ripe fruits and larvae develop within the fruit. To understand how D. suzukii larvae utilize ripe and ripening fruits, which usually have low levels of protein, we investigated the microbiota of field-captured and laboratory-reared D. suzukii flies and further examined the combined influence of diet and microbes on host fitness. Field-captured flies were associated with diverse microbiota, which varied significantly with sampling location and season. In contrast, laboratory-reared flies possessed strikingly lower bacterial abundance and diversity. A comparison of conventionally reared (CR) and germ-free (GF) flies revealed that the microbiota of D. suzukii does not alter its development significantly but decreases its life span under conditions of a nutrient-sufficient diet. However, the microbiota is essential for D. suzukii development on strawberry-based or blueberry-based fruit diets. This developmental failure could be rescued by reassociation with single bacterial or fungal species or by the addition of a high quantity of heat-killed microbes. In addition, we found that proteins are limiting with respect to fly development on fruit-based diets and that GF flies show signs of protein starvation. Taken together, our study results demonstrate that the microbiota provides key proteins required for the development of D. suzukii reared on fresh fruit. Our work shows that the impact of microbes on fly fitness depends strongly on nutritional conditions. IMPORTANCE Animals are commonly associated with specific microbes, which play important roles in host development and fitness. However, little information about the function of microbes has been available for the important invasive pest Drosophila suzukii, also known as Spotted wing drosophila. Our study results demonstrate that the abundance and structure of microbiota in D. suzukii are strongly affected by the environment, where microbes have variable roles depending on the nutritional situation. For instance, we found that the presence of microbes is deleterious for flies growing on a protein-rich diet and yet is beneficial for flies growing on a diet of protein-poor fruits. Additionally, germ-free flies must feed on microbes to obtain the necessary protein for larval development on strawberries and blueberries. Our report validates the complexity seen in host-microbe interactions and may provide information useful for D. suzukii pest control.XiaoLi BingJoseph GerlachGregory LoebNicolas BuchonAmerican Society for MicrobiologyarticleDrosophila suzukiiTORdevelopmentfruitinsulin pathwaylarval growthMicrobiologyQR1-502ENmBio, Vol 9, Iss 2 (2018)
institution	DOAJ
collection	DOAJ
language	EN
topic	Drosophila suzukii TOR development fruit insulin pathway larval growth Microbiology QR1-502
spellingShingle	Drosophila suzukii TOR development fruit insulin pathway larval growth Microbiology QR1-502 XiaoLi Bing Joseph Gerlach Gregory Loeb Nicolas Buchon Nutrient-Dependent Impact of Microbes on <italic toggle="yes">Drosophila suzukii</italic> Development
description	ABSTRACT Drosophila suzukii Matsumura is an invasive species of vinegar fly that has become a prominent pest of berries and other soft-skinned fruits. Unlike most other Drosophila species, female D. suzukii flies lay their eggs in ripening and ripe fruits and larvae develop within the fruit. To understand how D. suzukii larvae utilize ripe and ripening fruits, which usually have low levels of protein, we investigated the microbiota of field-captured and laboratory-reared D. suzukii flies and further examined the combined influence of diet and microbes on host fitness. Field-captured flies were associated with diverse microbiota, which varied significantly with sampling location and season. In contrast, laboratory-reared flies possessed strikingly lower bacterial abundance and diversity. A comparison of conventionally reared (CR) and germ-free (GF) flies revealed that the microbiota of D. suzukii does not alter its development significantly but decreases its life span under conditions of a nutrient-sufficient diet. However, the microbiota is essential for D. suzukii development on strawberry-based or blueberry-based fruit diets. This developmental failure could be rescued by reassociation with single bacterial or fungal species or by the addition of a high quantity of heat-killed microbes. In addition, we found that proteins are limiting with respect to fly development on fruit-based diets and that GF flies show signs of protein starvation. Taken together, our study results demonstrate that the microbiota provides key proteins required for the development of D. suzukii reared on fresh fruit. Our work shows that the impact of microbes on fly fitness depends strongly on nutritional conditions. IMPORTANCE Animals are commonly associated with specific microbes, which play important roles in host development and fitness. However, little information about the function of microbes has been available for the important invasive pest Drosophila suzukii, also known as Spotted wing drosophila. Our study results demonstrate that the abundance and structure of microbiota in D. suzukii are strongly affected by the environment, where microbes have variable roles depending on the nutritional situation. For instance, we found that the presence of microbes is deleterious for flies growing on a protein-rich diet and yet is beneficial for flies growing on a diet of protein-poor fruits. Additionally, germ-free flies must feed on microbes to obtain the necessary protein for larval development on strawberries and blueberries. Our report validates the complexity seen in host-microbe interactions and may provide information useful for D. suzukii pest control.
format	article
author	XiaoLi Bing Joseph Gerlach Gregory Loeb Nicolas Buchon
author_facet	XiaoLi Bing Joseph Gerlach Gregory Loeb Nicolas Buchon
author_sort	XiaoLi Bing
title	Nutrient-Dependent Impact of Microbes on <italic toggle="yes">Drosophila suzukii</italic> Development
title_short	Nutrient-Dependent Impact of Microbes on <italic toggle="yes">Drosophila suzukii</italic> Development
title_full	Nutrient-Dependent Impact of Microbes on <italic toggle="yes">Drosophila suzukii</italic> Development
title_fullStr	Nutrient-Dependent Impact of Microbes on <italic toggle="yes">Drosophila suzukii</italic> Development
title_full_unstemmed	Nutrient-Dependent Impact of Microbes on <italic toggle="yes">Drosophila suzukii</italic> Development
title_sort	nutrient-dependent impact of microbes on <italic toggle="yes">drosophila suzukii</italic> development
publisher	American Society for Microbiology
publishDate	2018
url	https://doaj.org/article/afe809df48bc44a384e8d23d03606f46
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Nutrient-Dependent Impact of Microbes on <italic toggle="yes">Drosophila suzukii</italic> Development

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