scholarly journals Drosophila suzukii avoidance of microbes in oviposition choice

2021 ◽  
Vol 8 (1) ◽  
pp. 201601
Author(s):  
Airi Sato ◽  
Kentaro M. Tanaka ◽  
Joanne Y. Yew ◽  
Aya Takahashi
Keyword(s):  
Drosophila Melanogaster ◽  
Microbial Growth ◽  
Chemical Cues ◽  
Egg Laying ◽  
Site Preference ◽  
Drosophila Suzukii ◽  
Oviposition Choice ◽  
Oviposition Site Preference ◽  
Oviposition Substrate ◽  
Oviposition Sites

While the majority of Drosophila species lays eggs onto fermented fruits, females of Drosophila suzukii pierce the skin and lay eggs into ripening fruits using their serrated ovipositors. The changes of oviposition site preference must have accompanied this niche exploitation. In this study, we established an oviposition assay to investigate the effects of commensal microbes deposited by conspecific and heterospecific individuals and showed that the presence of microbes on the oviposition substrate enhances egg laying of Drosophila melanogaster and Drosophila biarmipes , but discourages that of D. suzukii . This result suggests that a drastic change has taken place in the lineage leading to D. suzukii in how females respond to chemical cues produced by microbes. We also found that hardness of the substrate, resembling that of either ripening or damaged and fermenting fruits, affects the response to microbial growth, indicating that mechanosensory stimuli interact with chemosensory-guided decisions to select or avoid oviposition sites.

scholarly journals Drosophila suzukii avoidance of microbes in oviposition choice

2020 ◽  
Author(s):  
Airi Sato ◽  
Kentaro M. Tanaka ◽  
Joanne Y. Yew ◽  
Aya Takahashi
Keyword(s):  
Microbial Growth ◽  
Chemical Cues ◽  
Egg Laying ◽  
Oviposition Site ◽  
Site Preference ◽  
Drosophila Suzukii ◽  
Oviposition Choice ◽  
Oviposition Site Preference ◽  
Oviposition Substrate ◽  
Oviposition Sites

AbstractWhile the majority of Drosophila species lay eggs onto fermented fruits, females of D. suzukii pierce the skin and lay eggs into ripening fruits using their serrated ovipositors. The changes of oviposition site preference must have accompanied this niche exploitation. In this study, we established an oviposition assay to investigate the effects of commensal microbes deposited by conspecific and heterospecific individuals, and showed that presence of microbes on the oviposition substrate enhances egg-laying of D. melanogaster and D. biarmipes, but discourages that of D. suzukii. This result suggests that a drastic change has taken place in the lineage leading to D. suzukii in how females respond to chemical cues produced by microbes. We also found that hardness of the substrate affects the response to microbial growth, indicating that mechanosensory stimuli interact with chemosensory invoked decisions to select or avoid oviposition sites.

scholarly journals The mating rate of Drosophila suzukii reduction due to reproductive interference from Drosophila melanogaster

2020 ◽  
Author(s):  
Yongzhuo Chen ◽  
Min Zhang ◽  
Wei Hu ◽  
Jing Li ◽  
Pengcheng Liu ◽  
...  
Keyword(s):  
Drosophila Melanogaster ◽  
Interspecific Competition ◽  
Population Size ◽  
Egg Laying ◽  
Significant Decline ◽  
Reproductive Interference ◽  
Drosophila Suzukii ◽  
Offspring Number ◽  
Successful Mating ◽  
Reproductive Activities

Abstract Background Drosophila suzukii is widely distributed. Research has revealed that the presence of Drosophila melanogaster can reduce the emergence and egg laying of D. suzukii. However, the reasons for these phenomena have not yet been reported. To investigate this issue, we sought to answer three questions: Can the presence of D. melanogaster reduce the longevity of D. suzukii? Does D. melanogaster dominate in larval interspecific competition with D. suzukii? Does reproductive interference occur between these species; i.e., do individuals of one species (e.g., D. suzukii) engage in reproductive activities with individuals of the other (e.g., D. melanogaster) such that the fitness of one or both species is reduced? Results The results showed that the adult offspring number of Drosophila suzukii was significantly reduced when this species was reared with Drosophila melanogaster. The larval interspecific competition had no significant effects on Drosophila suzukii longevity or population size. Surprisingly, Drosophila melanogaster imposed reproductive interference on males of Drosophila suzukii, which led to a significant decline in the rate of successful mating of the latter species. Conclusions The presence of Drosophila melanogaster causes the population size of Drosophila suzukii to decrease through reproductive interference, and the rate of successful mating in Drosophila suzukii is significantly reduced in the presence of Drosophila melanogaster.

Oviposition-site preference and ADH activity in Drosophila melanogaster

Genetica ◽  
1982 ◽  
Vol 58 (2) ◽  
pp. 121-128 ◽  
Author(s):  
N. Hougouto ◽  
M. C. Li�taert ◽  
M. Libion-Mannaert ◽  
E. Feytmans ◽  
A. Elens
Keyword(s):  
Drosophila Melanogaster ◽  
Oviposition Site ◽  
Site Preference ◽  
Oviposition Site Preference ◽  
Adh Activity

scholarly journals Exploring multiple sensory systems in ovipositors of Drosophila suzukii and related species with different egg-laying behaviour

2019 ◽  
Author(s):  
Cristina Maria Crava ◽  
Roberto Romani ◽  
Damiano Zanini ◽  
Simone Amati ◽  
Giorgia Sollai ◽  
...  
Keyword(s):  
Common Core ◽  
Sensory Systems ◽  
Egg Laying ◽  
Pest Species ◽  
Drosophila Suzukii ◽  
Fruit Skin ◽  
Sensory Modalities ◽  
Sensory Structures ◽  
Ovipositor Morphology ◽  
Oviposition Sites

ABSTRACTDrosophila suzukii is an invasive agricultural pest species that lays eggs in fruit during ripening, while most closely related Drosophila species use rotten matter as oviposition substrates. This behaviour is allowed by an enlarged and serrated ovipositor that can pierce intact fruit skin. D. suzukii combines multiple sensory systems (mechanosensation, olfaction, and taste) to select oviposition sites. Here, we test the hypothesis that the D. suzukii ovipositor is involved in these sensory modalities. We first investigate the ovipositor gene expression using a comparative framework of four Drosophila species with gradual changes in ovipositor morphology to identify evolutionary adaptations specific to D. suzukii. Results show transcription of chemoreceptors and mechanoreceptors in the four species, with a common core of sensory receptors expressed in all of them. Then, we demonstrate that sensory structures present in the distal tip of the D. suzukii ovipositor are mechanosensory-like sensilla, and that the degenerin/epithelial sodium channel ppk is expressed in homologous structures in Drosophila melanogaster. Our results suggest the D. suzukii ovipositor playing a role in mechanosensation, which might be shared with other Drosophila species.

scholarly journals The Drosophila Suzukii Mating Rate Decrease for the Reproductive Interference of Drosophila Melanogaster

2020 ◽  
Author(s):  
Yongzhuo Chen ◽  
Min Zhang ◽  
Wei Hu ◽  
Jing Li ◽  
Pengcheng Liu ◽  
...  
Keyword(s):  
Drosophila Melanogaster ◽  
Interspecific Competition ◽  
Fruit Fly ◽  
Economic Loss ◽  
Egg Laying ◽  
Reproductive Interference ◽  
Drosophila Suzukii ◽  
Mating Rate ◽  
Offspring Number ◽  
Successful Mating

Abstract Background: Drosophila suzukii has been widely distributed all over the world since 2008, and it is a harmful pest causing great economic loss in many countries. Previous research has found that the presence of Drosophila melanogaster could reduce the emergence and egg laying of Drosophila suzukii. In order to figure out the potential mechanism of this phenomenon, we studied three potential factors including lifetime, larval interspecific competition, and reproductive interference. Results: The results show that the Drosophila suzukii offspring number was significantly decreased when reared with Drosophila melanogaster. The lifetime and larval interspecific competition have no significant effect on the Drosophila suzukii population. Surprisingly, Drosophila melanogaster can cause reproductive interference with male Drosophila suzukii, which leads to a significant decline in the successful mating rate of the latter fruit fly. Conclusions: The presence of Drosophila melanogaster causes the Drosophila suzukii population to decrease through the effect of reproductive interference, and the Drosophila suzukii successful mating rate is significantly decreased for the existence of Drosophila melanogaster.

scholarly journals Structural comparison of the rostra of two species of weevils coexisting on Ailanthus altissima: the response to ecological demands of egg deposition

2021 ◽  
Vol 21 (1) ◽  
Author(s):  
Ganyu Zhang ◽  
Wenjuan Guo ◽  
Xiaoyi Wang ◽  
Qian Wang ◽  
Jin Cui ◽  
...  
Keyword(s):  
Adaptive Radiation ◽  
Egg Laying ◽  
Ailanthus Altissima ◽  
Structural Comparison ◽  
Structural Differentiation ◽  
Functional Potential ◽  
Egg Deposition ◽  
Adductor Muscles ◽  
Structural Differences ◽  
Oviposition Sites

Abstract Background Elongated rostra play an important role in the egg-laying of weevils, and its emergence plays a key role in the adaptive radiation of weevils. Eucryptorrhynchus scrobiculatus Motschulsky and E. brandti Harold co-occur on the same only host Ailanthus altissima, while their oviposition sites are different. In order to understand the adaptation between the rostra of the two weevils and their oviposition sites, the structural differentiation of the rostra in E. scrobiculatus and E. brandti was compared. Results The present study reveals that: (1) The rostra length of E. scrobiculatus and E. brandti was found to be correlated with body size, larger weevils have a correspondingly longer rostrum. The increase of rostra length may be a byproduct of larger weevils. (2) There were significant differences in the external shape of the two rostra, especially the shape of the mandibles of the mouthparts at the apex of the rostra used to excavate an oviposition cavity. (3) There was no difference in the size of the abductor muscles that control the extension of the mandibles, but there were significant differences in the size of the adductor muscles that control the contraction of the mandibles. Conclusions These structural differences reflect the functional potential ovipositional tactics of rostra, which is considered to be a response to the ecological demands of egg deposition, and also provide new insights into the coexistence of two weevil species in the same host A. altissima.

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