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Hosting certain facultative symbionts modulates the phenoloxidase activity and immune response of the pea aphid Acyrthosiphon pisum

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Insect Science 2021年第6期28卷 1780-1799页

作者： Chen Luo Maya Belghazi Antonin Schmitz Severine Lemauf Nicolas Desneux Jean-Christophe Simon Marylene Poirie Jean-Luc Gatti Universite Cote d'Azur INRAECNRSUMR Institut Sophia Agrobiotech(ISA)Sophia AntipolisFrance INP UMR7051CNRSAix Marseille UniversiteMarseille13015France Universite Cote d'Azur INRAECNRSUMR Institut Sophia Agrobiotech(ISA)06000 NiceFrance inrae umr IGEPP Domaine de la MotteLe RheuFrance Present address:State Key Laboratory of Crop Stress Biology for Arid Areas College of Plant ProtectionNorthwest A&F UniversityYanglingShaanxi Province712100China

The pea aphid Acyrthosiphon pisum hosts different facultative symbionts(FS)which provide it with various benefits,such as tolerance to heat or protection against natural enemies(e.g.,fungi,parasitoid wasps).Here,we investigated whether and how the presence of certain FS could affect phenoloxidase(PO)activity,a key component of insect innate immunity,under normal and stressed *** this,we used clones of *** of difTerent genetic backgrounds(LLOl,YR2 and T3-8V1)lacking FS or harboring one or two(Regiella insecticola,Hamiltonella defensa,Serratia symbiotica Rickettsiella viridis).Gene expression and proteomics analyses of the aphid hemolymph indicated that the two *** POs,PPOl and PP02,are expressed and translated into *** level of PPO genes expression as well as the amount of PPO proteins and phenoloxidase activity in the hemolymph depended on both the aphid genotype and FS *** particular,*** and ***,but not ***-h ***,caused a sharp decrease in PO activity by interfering with both transcription and *** microinjection of different types of stressors(yeast,Escherichia coli,latex beads)in the YR2 lines hosting different symbionts affected the survival rate of aphids and,in most cases,also decreased the expression of PPO genes after 24 *** amount and activity of PPO proteins varied according to the type of FS and stressor,without clear corresponding changes in gene *** data demonstrate that the presence of certain FS influences an important component of pea aphid immunity.

关键词： Acyrthosiphon pisum facultative symbionts hemolymph immune response pea aphid phenoloxidases

Central role of altered phosphodiesterase 2-dependent signaling in the pathophysiology of cognition-based brain disorders

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Neural Regeneration Research 2025年第8期20卷 2302-2303页

作者： Asma Boulksibat Alessandra Tempio Barbara Bardoni institut de Pharmacologie Moléculaire et Cellulaire CNRS UMR7275Inserm U1323ValbonneFrance

The second messengers 3',5'-cyclic adenosine monophosphate(cAMP)and 3',5'-cyclic guanosine monophosphate(cGMP)modulate molecular pathways that are involved in a large variety of cellular *** the brain,these processes include neurogenesis,neuronal differentiation,activation and function of microglia,and synaptic plasticity,finally resulting in memory formation.

关键词： formation processes finally

Role of CYP311A1 in wing development of Drosophila melanogaster

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Insect Science 2024年第3期31卷 748-758页

作者： Xubo Zhang Mengqi Liu Andi Cheng Bernard Moussian Jianzhen Zhang Wei Dong Shanxi Key Laboratory of Nucleic Acid Biopesticides Institute of Applied BiologyShanxi UniversityTaiyuanChina College of Life Science Shanxi UniversityTaiyuanChina inrae CNRSInstitut Sophia AgrobiotechSophia AntipolisUniversite Cote d'AzurNiceFrance

Lipid homeostasis is crucial for growth and development of *** cytochrome P450 monooxygenases(CYPs)are involved in lipid *** function of Cyp3llal in the anterior midgut as a regulator of phosphatidylethanolamine(PE)metabolism in Drosophila melanogaster has been demonstrated,as depletion of Cyp31lal caused larval growth arrest that was partially rescued by supplying *** this study,we investigated the role of CYP311A1 in wing morphogenesis in *** the GAL4-UAS system,Cyp31lal was selectively knocked down in the wing disc.A deformed wing phenotype was observed in flies with reduced Cyp31lal *** and oil red O staining revealed a reduction of neutral lipids in the wing disc after the depletion of *** addition,we observed an enhanced sensitivity to Eosin Y penetration in the wings of Cyp31lal knocked-down ***,the reduction of CYP311A1 function in developing wings does not affect cell proliferation and apoptosis,but entails disordered Phalloidin or Cadherin distribution,suggesting an abnormal cell morphology and cell cortex structure in wing epithelial *** together,our results suggest that Cyp3llal is needed for wing morphogenesis by participating in lipid assembly and cell homeostasis.

关键词： apoptosis cell cortex cell proliferation Cyp31lal lipid wing

Spirotetramat reduces fitness of the spotted-wing Drosophila,Drosophila suzukii

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Insect Science 2024年第4期31卷 1222-1230页

作者： Jing Yang Justin Flaven-Pouchon Yiwen Wang Bernard Moussian Section of Animal Genetics Interfaculty Institute of Cell BiologyUniversity of TübingenTübingenGermany School of Pharmaceutical Science and Technology Tianjin UniversityTianjinChina inrae CNRSUniversitéCôte d'AzurInstitut Sophia AgrobiotechSophia AntipolisFrance

With climate change,the spotted-wing Drosophila(SWD,Drosophila suzukii)invades a great number of fruit production regions worldwide.A plethora of insecticides are being applied for management of this *** expected,SWD develops resistance against some potent insecticides or is rather insensitive to some ***,there is an urgent need to identify and characterize alternative insecticides to control SWD ***,we have studied the effects of the orally applied inhibitor of the fatty acid synthesis pathway spirotetramat on SWD fitness with respect to fecundity and surface barrier function at different *** our experiments,we applied spirotetramat mixed with baker's yeast and showed that females and males were not repelled by effective concentrations of this *** found that spirotetramat,by trend,lowers egg numbers laid by fed *** eggs rapidly desiccate,and only a few larvae *** is lethal to larvae and reduces survival of adult flies under low-humidity *** together,based on our data,we propose to use yeast supplemented with spirotetramat and additional SWD-specific attractants in traps in non-crop areas in order to eradicate SWD populations before they infest crop production sites.

关键词： desiccation Drosophila suzuki insecticide lipids

BABA-induced pathogen resistance: a multi-omics analysis of the tomato response reveals a hyper-receptive status involving ethylene

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Horticulture Research 2023年第6期10卷 16-29页

作者： Martina Zapletalova Corinne Rancurel Benoit Industri Marc Bardin Kevin Le Brigand Philippe Nicot Virginie Magnone Aurelie Seassau Pascal Barbry David Potesil Zbynek Zdrahal Michel Ponchet Jan Lochman umr institut sophia agrobiotech inrae 1355 CNRS 6254UniversitéCôte d’Azur400Route des Chappes06903 Sophia AntipolisFrance Department of Biochemistry Faculty of ScienceMasaryk UniversityKotlarska261137 BrnoCzech Republic Unité407 Pathologie végétale INRAEDomaine Saint-Maurice84143 Montfavet cedexFrance umr institut de Pharmacologie Moléculaire et Cellulaire UniversitéCôte d’AzurCNRS 7275660 Route des Lucioles 06560 ValbonneFrance Central European institute of Technology Masaryk UniversityKamenice 562500 BrnoCzech Republic

Prior exposure to microbial-associated molecular patterns or specific chemical compounds can promote plants into a primed state with stronger defence responses.β-aminobutyric acid(BABA)is an endogenous stress metabolite that induces resistance protecting various plants towards diverse *** this study,by integrating BABA-induced changes in selected metabolites with transcriptome and proteome data,we generated a global map of the molecular processes operating in BABA-induced resistance(BABA-IR)in *** significantly restricts the growth of the pathogens Oidium neolycopersici and Phytophthora parasitica but not Botrytis cinerea.A cluster analysis of the upregulated processes showed that BABA acts mainly as a stress factor in *** main factor distinguishing BABA-IR from other stress conditions was the extensive induction of signaling and perception machinery playing a key role in effective resistance against ***,the signalling processes and immune response activated during BABA-IR in tomato differed from those in Arabidopsis with substantial enrichment of genes associated with jasmonic acid(JA)and ethylene(ET)signalling and no change in Asp *** results revealed key differences between the effect of BABA on tomato and other model plants studied until ***,salicylic acid(SA)is not involved in BABA downstream signalization whereas ET and JA play a crucial role.

关键词： BABA resistance analysis

Identification of Naturally Occurring Polyamines as Root-Knot Nematode Attractants

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Molecular Plant 2020年第4期13卷 658-665页

作者： Morihiro Oota Allen Yi-Lun Tsai Dan Aoki Yasuyuki Matsushita Syuuto Toyoda Kazuhiko Fukushima Kentaro Saeki Kei Toda Laetitia Perfus-Barbeoch Bruno Favery Hayato Ishikawa Shinichiro Sawa Graduate School of Science and Technology Kumamoto UniversityKurokami 2-39-1Kumamoto 860-8555Japan Graduate School of Bioagricultural Sciences Nagoya UniversityNagoya 464-8601Japan INRA Universite Cote d'AzurCNRSUMR 1355-7254 Institut Sophia AgrobiotechSophia-Antipolis 06900France Present address:Dormancy and Adaptation Research Unit RIKEN Center for Sustainable Resource ScienceYokohama 230-0045Japan

Root-knot nematodes(RKNs;genus Meloidogyne)are a class of plant parasites that infect the roots of many plant *** is believed that RKNs target certain signaling molecules derived from plants to locate their hosts;however,currently,no plant compound has been unambiguously identified as a universal RKN *** address this question,we screened a chemical library of synthetic compounds for Meloidogyne incognita *** breakdown product of aminopropylam ino-anthraquinone,1,3-diam inopropane,as well as its related compounds,putrescine and cadaverine,were found to attract *** exam ining various polyamines,*** were found to be attracted specifically by natural com pounds that possess three to five methylene groups between two terminal amino *** cryo-TO F-SIM S/SEM,cadaverine was indeed detected in soybean root cortex cells and the surrounding rhizosphere,establishing a chemical *** addition to cadaverine,putrescine and 1,3-diam inopropane were also detected in root exudate by HPLC-MS/*** ore,exogenously applied cadaverine is sufficient to enhance *** infection of Arabidopsis *** results suggest that *** is likely attracted by polyam ines to locate the appropriate host plants,and the naturally occurring polyamines have potential applications in agriculture in developing protection strategies for crops from RKN infection.

关键词： plant-parasitic nematode chemotaxis rhizosphere organic diamine

Very high conservation between Cyp6a2 from Drosophila melanogaster and its ortholog Cyp6a26 from D. simulans

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Insect Science 2007年第1期14卷 15-27页

作者： SOPHIE TARES LAURY ARTHAUD ALEXANDRA BRUN-BARALE DIDIER CROCHARD JEAN-MARC BRIDE MARCEL AMICHOT institut National de la Recherche Agronomique UMR ROSE 1112 Sophia-Antipolis France

Although Drosophila simulans is closely related to D. melanogaster, very few cytochrome P450 genes have been studied in this species until now. As Cyp6a2 from D. melanogaster is a major gene implicated in the detoxification of xenobiotic molecules, we decided to look for its ortholog in D. simulans. The isolated gene, Cyp6a26, presents structural characteristics very similar to those of Cyp6a2： an identical size of 1590-bp comprising two exons separated by a 69-bp intron and a nucleotide sequence homology of 95%. Many putative transcriptionally important motifs were identified in the upstream DNAs of the two genes but only 16 elements are in common positions. Treatment of flies with phenobarbital leads to an increased production of Cyp6a26 mRNAs. The expression of Cyp6a26 mRNAs varies following developmental stages in the same manner as Cyp6a2. Immunohistochemistry experiments of phenobarbital-treated adult drosophila show that the spatial expression pattern of the two proteins is also conserved between the two species. All these data argue in favor of the conservation of the function of these homologous genes between the two Drosophila species.

关键词： cytochrome P450 Drosophila ortholog mRNA expression promotor

Functional trait composition of carabid beetle communities predicts prey suppression through both mass ratio and niche complementarity mechanisms

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Insect Science 2024年第2期31卷 562-574页

作者： Abdelhak Rouabah Francoise Lasserre-Joulin Sylvain Plantureux Simon Taugourdeau Bernard Amiaud Universite de Loraine INRAELAENancyF-54000France umr SELMET CIRADINRAEInstitut AgroUniversite de MontpellierMontpellier34000France CIRAD UMR SELMET-PPZSDakarSéenegal umr Siva Universitéde LorraineAgroParisTechINRAEVandoeuvreLes Nancy54506France

Several components of predator functional diversity have been hypothesized to influence prey suppression through either niche complementarity or mass ratio ***,most studies have used a functional group approach when assessing the role of these predators in ecosystem *** adopting a trait-based approach,we evaluated the relative contributions of carabid diversity components in predicting prey *** results highlight the importance of both taxonomic and functional diversity components of carabids as key drivers of prey *** suppression was best predicted by carabid densities,with the dominance of Poecilus cupreus potentially driving the positive effect of community total abundance through the mass ratio *** suppression increased with increasing the density of large *** addition,carabid eye diameter and antennal length were key functional traits for predicting prey ***,prey suppression increased with increasing carabid functional richness following the niche complementarity *** contrast to functional richness,functional evenness and functional divergence of carabid communities were weakly correlated with prey *** identifying which diversity components of carabid communities contribute the most to increase prey suppression,our results can guide efforts aiming to predict the relationship between diversity of these predators and ecosystem functioning.

关键词： abundance distribution biological control body size ecosystem function functional richness predator-prey interactions

Chitinase 6 is required for procuticle thickening and organ shape in Drosophila wing

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Insect Science 2023年第2期30卷 268-278页

作者： Wei Dong Justin Flaven-Pouchon Ying-Hao Gao Chen-Yang Song Abeer El Wakil Jian-Zhen Zhang Bernard Moussian institute of Applied Biology Shanxi UniversityTaiyuanChina Interfaculty institute of Cell Biology University of TübingenTübingenGermany College of Life Science Shanxi UniversityTaiyuanChina Faculty of Education Department of Biological and Geological SciencesAlexandria UniversityAlexandriaEgypt inrae CNRSUniversitéCote d’AzurInstitut Sophia AgrobiotechSophia AntipolisFrance

The polysaccharide chitin is a major scaffolding molecule in the insect *** order to be functional,both chitin amounts and chitin organization have been shown to be important *** great advances in the past decade,the molecular mechanisms of chitin synthesis and organization are not fully ***,we have characterized the function of the Chitinase 6(Cht6)in the formation of the wing,which is a simple flat cuticle organ,in the fruit fly Drosophila *** of Cht6 function by RNA interference during wing development does not affect chitin organization,but entails a thinner cuticle suggesting reduced chitin *** phenotype is opposed to the one reported recently to be caused by reduction of Cht10 *** as a consequence,cuticle permeability to xenobiotics is enhanced in Cht6-less *** also observed massive deformation of these *** addition,the shape of the abdomen is markedly changed upon abdominal suppression of ***,we found that suppression of Cht6 transcript levels influences the expression of genes coding for enzymes of the chitin biosynthesis *** finding indicates that wing epidermal cells respond to activity changes of Cht6 probably trying to adjust chitin ***,in a working model,we propose that Cht6-introduced modifications of chitin are needed for chitin synthesis to proceed *** thickness,according to our hypothesis,is in turn required for correct organ or body part *** molecular mechanisms of this processes shall be characterized in the future.

关键词： abdomen chitin Cht6 Drosophila melanogaster procuticle wing