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Latest recommendations
Id | Title * | Authors * | Abstract * | Picture * | Thematic fields * | Recommender | Reviewers | Submission date | |
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28 Nov 2024
Design of a new model yeast consortium for ecological studies of enological fermentationEléonore Pourcelot, Audrey Vigna, Thérèse Marlin, Virginie Galeote, Thibault Nidelet https://doi.org/10.1101/2024.05.06.592697Yeast consortium for novel wine fermentationsRecommended by Francisco Cubillos based on reviews by Pablo Villarreal, Cristian Varela and 3 anonymous reviewersThe article by Pourcelot et al. (2024) brings a novel approach to wine fermentation. Recently, scientific advances have focused on utilizing microbial consortiums rather than individual species alone or even two individuals co-inoculated. However, spontaneous fermentations are complex, and microbes work in communities. This work aims to design a yeast consortium by studying the population changes over time and determining the metabolite production and fermentation kinetics. In this way, the authors present an elegant molecular approach by tagging each strain to construct a wine fermentation consortium. References Eléonore Pourcelot, Audrey Vigna, Thérèse Marlin, Virginie Galeote, Thibault Nidelet (2024) Design of a new model yeast consortium for ecological studies of enological fermentation. bioRxiv, ver.4 peer-reviewed and recommended by PCI Microbiol https://doi.org/10.1101/2024.05.06.592697 | Design of a new model yeast consortium for ecological studies of enological fermentation | Eléonore Pourcelot, Audrey Vigna, Thérèse Marlin, Virginie Galeote, Thibault Nidelet | <p>Wine fermentation involves complex microbial communities of non-<em>Saccharomyces</em> yeast species besides the well-known <em>Saccharomyces cerevisiae</em>. While extensive research has enhanced our understanding of <em>S. cerevisiae</em>, th... | Microbial ecology and environmental microbiology | Francisco Cubillos | Cristian Varela, Pablo Villarreal, Anonymous | 2024-05-24 12:17:23 | View | |
21 Nov 2024
The effect of dietary fish oil replacement by microalgae on the gilthead sea bream midgut bacterial microbiotaStefanos Katsoulis-Dimitriou, Eleni Nikouli, Elli-Zafeiria Gkalogianni, Ioannis Karapanagiotidis, Konstantinos Kormas https://doi.org/10.1101/2024.01.24.576938Insights on the gilthead sea bream midgut microbiota adaptation to three types of microalgal-based dietsRecommended by Angélique Gobet based on reviews by Yaqiu Liu and 1 anonymous reviewerIn fed aquaculture, fishes are commonly fed with a fish-oil based diet mostly coming from captured fishes. This is one main global issue leading to overfishing of wild species (Cashion et al., 2017; Tacon & Metian, 2008). Several alternatives in lipid sources for fish diet have been tested and promising alternatives such as plants (e.g. rapeseed oil) or microalgae (e.g. Schizochytrium sp.) have been identified (Pérez-Pascual et al., 2020). Like other animals, fishes’ digestive tract is composed of a microbiota whose composition is linked to the host physiological state as well as its diet (Yukgehnaish et al., 2020). In reared fishes such as the European sea bass (Dicentrarchus labrax), replacing fish oil by other sources such as microalgae in their diet has been shown to modify the digestive microbiota composition (Pérez-Pascual et al., 2020). Here, the aim of Katsoulis-Dimitriou et al. (2024), was to test the effect of three dietary microalgae blends on the midgut microbiota composition of the reared fishes. The authors compared the effect of a control diet (i.e. with only fish oil as lipid source, namely, FO) with that of three experimental diets with two thirds of the fish oil replaced by either a mixture of the microalgae Microchloropsis gaditana and Isochrysis sp. (now known as Tisochrysis lutea, MI), Phaeodactylum tricornutum and Isochrysis sp. (PI) or Schizochytrium sp. and P. tricornutum (SP). For each diet, 25 fishes were reared in each of the triplicated tanks and, after 80 days of experiment, a total of 10 fishes per diet were sampled. DNA was extracted from the midgut part of the intestine and a 16S rDNA-based metabarcoding approach was conducted to survey the associated bacterial community. Each diet type, FO, MI, PI and SP, was mostly characterized by a composition of specific abundant OTUs, indicating the clear influence of the oil composition on the digestive microbiota. When feeding with the MI diet, the authors also highlighted the presence of some candidate genera (e.g. Pseudoalteromonas, Pseudomonas, Bacillus and Rhodopseudomonas) as potential probiotics for fish aquaculture. Finally, in comparison to the fish oil diet, a predictive metabolic analysis of the bacterial community could suggest a differential expression of some polysaccharide metabolisms with the microalgae-based diets, highlighting a probable diet-based effect on the microbiota functioning. The work from Katsoulis-Dimitriou et al. (2024) completes the current knowledge on using sustainable alternatives to traditional fish feed and its effect on the digestive microbiota composition of fishes. This work also opens new ways to be explored considering the enrichment of potential probiotics using microalgae-base diets. Further analyses testing specific functional approaches (e.g. transcriptomics, metabolomics) may allow completing the understanding of the gut microbiota functioning linked to diet composition. Finally, measurements on fish biometrics in a similar experiment should help understanding the contribution of a microalgal-diet to fish fitness. References Cashion, T., Le Manach, F., Zeller, D., & Pauly, D. (2017). Most fish destined for fishmeal production are food‐grade fish. Fish and Fisheries, 18(5), 837–844. https://doi.org/10.1111/faf.12209 Katsoulis-Dimitriou, S., Nikouli, E., Gkalogianni, E., Karapanagiotidis, I., Kormas, K. (2024) The effect of dietary fish oil replacement by microalgae on the gilthead sea bream midgut bacterial microbiota. BioRxiv, ver.3 peer-reviewed and recommended by PCI Microbiol https://doi.org/10.1101/2024.01.24.576938 Pérez-Pascual, D., Estellé, J., Dutto, G., Rodde, C., Bernardet, J.-F., Marchand, Y., Duchaud, E., Przybyla, C., & Ghigo, J.-M. (2020). Growth Performance and Adaptability of European Sea Bass (Dicentrarchus labrax) Gut Microbiota to Alternative Diets Free of Fish Products. Microorganisms, 8(9), 1346. https://doi.org/10.3390/microorganisms8091346 Tacon, A. G. J., & Metian, M. (2008). Global overview on the use of fish meal and fish oil in industrially compounded aquafeeds: Trends and future prospects. Aquaculture, 285(1–4), 146–158. https://doi.org/10.1016/j.aquaculture.2008.08.015 Yukgehnaish, K., Kumar, P., Sivachandran, P., Marimuthu, K., Arshad, A., Paray, B. A., & Arockiaraj, J. (2020). Gut microbiota metagenomics in aquaculture: Factors influencing gut microbiome and its physiological role in fish. Reviews in Aquaculture, 12(3), 1903–1927. https://doi.org/10.1111/raq.12416
| The effect of dietary fish oil replacement by microalgae on the gilthead sea bream midgut bacterial microbiota | Stefanos Katsoulis-Dimitriou, Eleni Nikouli, Elli-Zafeiria Gkalogianni, Ioannis Karapanagiotidis, Konstantinos Kormas | <p> It is well known that the gut microbiome and its interaction with the host influence several important factors for fish health such as nutrition and metabolism. Diet is one of the main factors influencing the composition of the gut microb... | Microbe-microbe and microbe-host interactions, Microbial symbiosis, Microbiomes | Angélique Gobet | 2024-01-25 18:09:56 | View | ||
19 Jul 2024
Microbiome turnover during offspring development varies with maternal care, but not moult, in a hemimetabolous insectMarie-Charlotte Cheutin, Manon Boucicot, Joel Meunier https://doi.org/10.1101/2024.03.26.586808Stability in a microbe-insect interactionRecommended by Konstantinos (Kostas) Kormas based on reviews by Guillame Minard and Enric FragoThe degree of fidelity between microbes and their hosts varies considerably among different animal groups but also along the host's developmental stages and depends on the stability of their microbial communities. Cheutin et al. showcase experimentally the stability of whole body bacterial microbiome in a dermapteran insect species, the European earwig Forficula auricularia. The carefully designed experiments, which include a large number of investigated families and the related methodologies along with the data analysis, revealed that the bacterial communities of this insect are highly dynamic during the early developmental stages, but these changes are rather specific to each developmental stage and rather irrelevant to moulting. Some of these changes were reflected in the dominant predicted metabolic pathways. Another important finding of this study was that maternal care of the eggs has a detectable impact on the future shaping of the adult insect bacterial microbiome. The findings of this paper clearly answer its working hypotheses, but they also generate a set of specific novel hypotheses for future studies. These hypotheses are of interest to the general field of animal-microbe interactions and, more specifically, to the driving forces of transmissability of microbes from one generation to the next one. This study also depicts some of the most likely important metabolic pathways in this insect-microbe relationship that could be the focus of future studies with more specific methodologies. References Cheutin M-C, Boucicot M, Meunier J. (2024). Microbiome turnover during offspring development varies with maternal care, but not moult, in a hemimetabolous insect. bioRxiv, ver.3, peer-reviewed and recommended by Peer Community In Microbiology. https://www.biorxiv.org/content/10.1101/2024.03.26.586808v3 | Microbiome turnover during offspring development varies with maternal care, but not moult, in a hemimetabolous insect | Marie-Charlotte Cheutin, Manon Boucicot, Joel Meunier | <p>The ecological success of insects often depends on their association with beneficial microbes. However, insect development involves repeated moults, which can have dramatic effects on their microbial communities. Here, we investigated whether a... | Microbial ecology and environmental microbiology, Microbial physiology, ecophysiology and metabolism, Microbiomes | Konstantinos (Kostas) Kormas | 2024-03-28 12:24:50 | View | ||
29 May 2024
The bacterial microbiome of symbiotic and menthol-bleached polyps of long-term aquarium-reared Galaxea fascicularisGiulia Puntin, Jane C.Y. Wong, Till Roethig, David M. Baker, Michael Sweet, Maren Ziegler https://doi.org/10.1101/2023.08.23.554380An important step forward in deciphering coral symbiosis through manipulative approachesRecommended by Yui Sato based on reviews by Tony Robinet and 1 anonymous reviewerAs complex multipartite interactions among the coral host and coral-associated microbial entities including the dinoflagellate symbionts, bacteria, archaea and viruses, have been appreciated, a manipulatable, less-complex study system is desired to deepen our functional understanding of this fascinating symbiotic system. Among experimental manipulation approaches, removal of the algal symbionts using menthol is widely implemented; however, its effect on the rest of the coral-associated symbiotic members has not been explored, which is critical knowledge to assess experimental works using this popular method. This preprint by Puntin et al. (https://doi.org/10.1101/2023.08.23.554380) presents an important observation in this aspect. Their initial observations suggest that menthol-induced coral bleaching introduces stochastic changes in associated bacterial communities, which resemble dysbiosis, making bacterial communities more dissimilar from each other. They also observed low taxonomic diversity in bacterial communities on the corals maintained in aquaria over several months, worth noting as a positive value as an experimental system. Their data are preliminary by nature, while they present intriguing ideas that warrant further studies. Reference Puntin G, Wong JCY, Röthig T, Baker DM, Sweet M, Ziegler M (2024). The bacterial microbiome of symbiotic and menthol-bleached polyps of long-term aquarium-reared Galaxea fascicularis (2024). bioRxiv, ver.4., peer-reviewed and recommended by Peer Community In Microbiology. https://doi.org/10.1101/2023.08.23.554380
| The bacterial microbiome of symbiotic and menthol-bleached polyps of long-term aquarium-reared *Galaxea fascicularis* | Giulia Puntin, Jane C.Y. Wong, Till Roethig, David M. Baker, Michael Sweet, Maren Ziegler | <p>Coral reefs support the livelihood of half a billion people but are at high risk of collapse due to the vulnerability of corals to climate change and local anthropogenic stressors. While understanding coral functioning is essential to guide con... | Microbial symbiosis, Microbiomes | Yui Sato | 2023-08-26 04:50:01 | View | ||
10 May 2024
Molybdate delays sulphide formation in the sediment and transfer to the bulk liquid in a model shrimp pondFunda Torun, Barbara Hostins, Peter De Schryver, Nico Boon, Jo De Vrieze https://doi.org/10.1101/2023.11.16.567380Addition of molybdate to shrimp ponds is a promising new technique to delay the accumulation of toxic H2SRecommended by Roey Angel based on reviews by 2 anonymous reviewersShrimp aquaculture ponds are an established technology that helps answer the demand for high-protein food while reducing the impact of fishing on the oceans. However, as a closed system, high in organic matter, aquaculture ponds in general and those used for shrimp in particular tend to develop anoxic sediments and favour sulfate reduction to H2S. The development of hydrogen sulphide, in return, is toxic to the shrimp and can lead to lower yields. A standard solution to the problem is to inject air into the sediments. However, this solution requires additional infrastructure, is costly to operate, and can also disturb other essential life forms in the pond, such as benthic plants. In this work by Torun et al. (2024), the authors used a carefully designed lab model of shrimp ponds to show that the addition of molybdate at concentrations as low as 5 mg/l delayed the accumulation of H2S and pushed the zone rich in sulphide deeper into the sediment. The postulated mechanism for the inhibition in H2S production is that molybdate binds to the ATP sulfurylase in sulphate-reducing bacteria (SRB), and together with ATP, they generate adenosine 5′-phosphosulfate (APS) that cannot be used as an electron acceptor. Surprisingly, however, the growth of SRB was stimulated rather than inhibited in this experiment. While the exact cause remains unknown, the authors postulate that SRB resorted to alternative metabolic pathways such as fermentation. Overall, while this work was done on a model system in the lab, adding molybdate to shrimp aquaculture ponds is a promising technique and should be tested on a larger scale. Reference Torun F, Hostins B, Schryver PD, Boon N, Vrieze JD. (2024). Molybdate delays sulphide formation in the sediment and transfer to the bulk liquid in a model shrimp pond. bioRxiv, ver.3, peer-reviewed and recommended by Peer Community In Microbiology. https://doi.org/10.1101/2023.11.16.567380 | Molybdate delays sulphide formation in the sediment and transfer to the bulk liquid in a model shrimp pond | Funda Torun, Barbara Hostins, Peter De Schryver, Nico Boon, Jo De Vrieze | <p>Shrimp are commonly cultured in earthen aquaculture ponds where organic-rich uneaten feed and faeces accumulate on and in the sediment to form anaerobic zones. Since the pond water is rich in sulphate, these anaerobic conditions eventually lead... | Microbial biotechnology, Microbial ecology and environmental microbiology, Microbiomes | Roey Angel | 2023-11-20 12:08:51 | View | ||
12 Apr 2024
Bacterial pathogens dynamic during multi-species infectionsMarie-Anne Barny, Sylvia Thieffry, Christelle Gomes de Faria, Elisa Thebault, Jacques Pedron https://doi.org/10.1101/2023.12.06.570389Unraveling disease ecology: insights from soft rot Pectobacteriaceae co-infectionsRecommended by Clara Torres-Barceló based on reviews by 2 anonymous reviewersFew studies deal with the understanding of disease ecology, especially in the agricultural domain. Soft rot Pectobacteriaceae are major plant pathogens that frequently co-infect potato tubers. Exploring their ecological relationships can provide valuable insights for effective monitoring and preventing disease. The study of Barny et al (2024) explores the dynamics of synthetic communities of soft rot Pectobacterium species (SRP) following in vitro and in vivo inoculations, focusing on the implications for disease development. To delve into co-infection dynamics, the authors constructed mixed populations comprising six strains, with three strains from each of two species. Through inoculations of both liquid cultures and potatoes, they observed outcomes using amplicon sequencing targeting the gapA gene, along with monitoring bacterial population sizes and symptoms on potato tubers. Results reveal intriguing patterns: competition among strains of the same species, cooperation through trophic interactions, and interference due to toxicity. Thanks to a modelling approach, they suggest that the presence of a cheater strain may be favoured when it is associated with an aggressive strain. This finding is crucial for field sampling strategies, as there is a risk that during an outbreak, only the cheater strain may be detected, potentially overlooking the problematic aggressive strain. While the study conducted by Barny et al. (2024) provides valuable insights into strain interactions, it also highlights areas for further exploration to enhance understanding. First, the extent to which different species occupy similar niches in real agricultural scenarios remains unclear. Additionally, comparative genomics analysis on strains and investigating specific gene candidates could offer valuable mechanistic insights into strain dynamics. These areas for future research offer chances to build up our knowledge base in this field and improve how we understand the interactions between bacteria in nature. The implications of the study extend beyond plant pathogens like SRP. Similar scenarios of complex diseases involving closely related species or strains competing within the same niche are observed in human pathogens as well. Reference Barny, M.-A., Thieffry, S., Gomes de Faria, C., Thebault, E., Pedron, J. (2024). Bacterial pathogens dynamic during multi-species infections. https://doi.org/10.1101/2023.12.06.570389
| Bacterial pathogens dynamic during multi-species infections | Marie-Anne Barny, Sylvia Thieffry, Christelle Gomes de Faria, Elisa Thebault, Jacques Pedron | <p>Soft rot Pectobacteriacea (SRP) gathers more than 30 bacterial species that collectively rot a wide range of plants by producing and secreting a large set of plant cell wall degrading enzymes (PCWDEs). Worldwide potato field surveys identified ... | Microbe-microbe and microbe-host interactions, Microbial ecology and environmental microbiology | Clara Torres-Barceló | 2023-12-12 17:54:07 | View | ||
04 Jan 2024
Diversity of bacterial symbionts associated with the tropical plant bug Monalonion velezangeli (Hemiptera: Miridae) revealed by high-throughput 16S-rRNA sequencingLucio Navarro-Escalante, Pablo Benavides, Flor Edith Acevedo https://doi.org/10.21203/rs.3.rs-2022560/v7Shedding light on bacteria associated with an agricultural pest, the tropical plant bug Monalonion velezangeli: a foundational descriptive studyRecommended by Jean-Marie Volland based on reviews by 2 anonymous reviewersThe paper "Diversity of bacterial symbionts associated with the tropical plant bug Monalonion velezangeli (Hemiptera: Miridae) revealed by high-throughput 16S rRNA sequencing" by Navarro-Escalante et al. (2023) is a valuable contribution to entomological research, particularly in the context of pest management. This descriptive study, while not delving into the functional characterization of the associated bacterial strains, lays an essential groundwork for understanding the bacterial components of the microbiota of this agricultural pest. This study is interesting because it provides new information on insect microbiota, especially in a family for which the knowledge of the diversity of bacterial symbionts is very limited. One of the study's core strengths lies in its exploration and definition of the core microbiota of M. velezangeli, which could serve as a foundation for future research aimed at pest control strategies. The use of 16S rRNA sequencing, despite its known limitations, has enabled the profiling of these bacterial communities. The paper highlights the absence of differences in the bacterial communities associated with the nymph and adult stages of the pest, indicating a stable association of these microbes throughout the insect's life cycle. A standout point in the study is the overwhelming presence of the symbiont Wolbachia, accounting for approximately 92% of the bacterial composition. However, intriguingly, the authors also note the absence of Wolbachia in some individuals, suggesting a more complex dynamic that warrants further investigation. This finding is particularly noteworthy, as it opens up questions about the role of Wolbachia and its impact on the biology and ecology of M. velezangeli. The researchers have carefully addressed all the reviewers’ comments and suggestions. They also addressed a potential bias in their study - the overwhelming presence of Wolbachia - by analyzing the bacterial community after the removal of Wolbachia sequences. This careful approach enriches the study's credibility and ensures a more accurate representation of the pest's microbiota. The identification of potentially culturable strains within the core microbiome represents an interesting perspective of this research. This information could be used in future efforts to develop pest control strategies, particularly those employing paratransgenic approaches. The possibility of manipulating these culturable strains to combat M. velezangeli presents an exciting avenue for sustainable pest management. While the study does not investigate the localization of these associated bacteria, whether in the gut or elsewhere, including potentially in dedicated symbiotic organs, it nevertheless offers a valuable descriptive account. This baseline knowledge will be useful for any subsequent functional or localization studies, which could further unravel the complex interactions between M. velezangeli and its microbial partners. In conclusion, the work of Navarro-Escalante et al. is a notable effort to set the stage for future research into the biology of M. velezangeli and its associated microbiota. The findings from this study provide a good reference point for further investigations aimed at pest's biology and exploring innovative pest control strategies. It also represents a valuable contribution to understanding the basic biology of insect-bacteria interactions.
| Diversity of bacterial symbionts associated with the tropical plant bug *Monalonion velezangeli* (Hemiptera: Miridae) revealed by high-throughput 16S-rRNA sequencing | Lucio Navarro-Escalante, Pablo Benavides, Flor Edith Acevedo | <p>Insects and microbes have developed complex symbiotic relationships that evolutionarily and ecologically play beneficial roles for both, the symbiont and the host. In most Hemiptera insects, bacterial symbionts offer mainly nutritional, defensi... | Microbial ecology and environmental microbiology, Microbial symbiosis | Jean-Marie Volland | 2022-10-31 20:31:54 | View | ||
13 Oct 2023
Fine-scale congruence in bacterial community structure from marine sediments sequenced by short-reads on Illumina and long-reads on NanoporeAlice Lemoinne, Guillaume Dirberg, Myriam Georges, Tony Robinet https://doi.org/10.1101/2023.06.06.541006ONT long-read sequencing and Illumina short-read sequencing of 16S rDNA amplicons give comparable results in terms of bacterial community structure in marine sedimentsRecommended by Aymé Spor based on reviews by 2 anonymous reviewersONT long-read high-throughput sequencing is not routinely used for metabarcoding studies of microbial communities. Even though this technology is supposed to considerably improve phylogenetic coverage and taxonomic resolution, it initially suffered from relatively poor read accuracy. Assessment of the performance of this new approach in comparison with routinely used 16S rDNA short-read sequencing is therefore needed to validate its use. The study by Lemoinne et al. (2023) offers a comprehensive comparison of two 16S rDNA metabarcoding approaches on marine sediment samples. By comparing Illumina short-read sequencing with ONT long-read sequencing, the authors conclude that bacterial community structures inferred from both technologies were similar. They also found that differences observed between sampling sites and along the sea-land orientation were comparable between the two technologies. However, the choice of technology still has an impact on the obtained results, notably in terms of bacterial diversity retrieved, taxonomic resolution, and replicability between biological replicates. Altogether, these results validate the use of ONT long-read sequencing for 16S metabarcoding approaches in marine sediments. Comparisons of such kinds targeting other remote environments are needed, as they might offer new opportunities for field scientists with no access to sequencing platforms to study the structure and composition of microbial communities. Reference Lemoinne, A., Dirberg, G., Georges, M., & Robinet, T. (2023). Fine-scale congruence in bacterial community structure from marine sediments sequenced by short-reads on Illumina and long-reads on Nanopore. biorXiv, version 3 peer-reviewed and recommended by Peer Community in Microbiology. https://doi.org/10.1101/2023.06.06.541006 | Fine-scale congruence in bacterial community structure from marine sediments sequenced by short-reads on Illumina and long-reads on Nanopore | Alice Lemoinne, Guillaume Dirberg, Myriam Georges, Tony Robinet | <p style="text-align: justify;">Following the development of high-throughput sequencers, environmental prokaryotic communities are usually described by metabarcoding with genetic markers on the 16S domain. However, short-read sequencing encounters... | Microbial ecology and environmental microbiology, Molecular microbiology | Aymé Spor | 2023-06-07 17:48:08 | View | ||
20 Sep 2023
Transmission of synthetic seed bacterial communities to radish seedlings: impact on microbiota assembly and plant phenotypeMarie Simonin, Anne Preveaux, Coralie Marais, Tiffany Garin, Gontran Arnault, Alain Sarniguet, Matthieu Barret https://doi.org/10.1101/2023.02.14.527860Seed synthetic community matters and its impact on seedling is strain- and not species-dependantRecommended by Sebastien Massart based on reviews by Cindy Morris, Sebastian Pfeilmeier and 1 anonymous reviewerEngineering plant microbiota can improve plant health and growth sustainably. Emergent approaches include rational Synthetic Communities (SynCom) design or soil amendments and specific agricultural practices to shift resident microbiota and to understand its impact (Moreira et al. 2023). In this context, the impact of seed microbiota on the early stages of plant development is becoming an essential topic in the study of plant–microbiota interactions. Behind the well-studied seed-borne pathogens, the seed microbiota can host many other commensal and beneficial organisms that have been neglected in the past. The study of Simonin et al. (2023) applies single isolates and synthetic communities (SynCom) on radish seeds to answer two key questions: what is the role of seed microbiota during the early stages of plant development? How can SynCom influence the seedling health and its microbiota? The study describes an elegant approach to cope with the variability of natural microbiota using SynCom following a gradient of complexity. Overall, the study highlighted a contrasted impact of the bacterial strains when applied in isolation or SynCom. The composition and complexity of the SynCom had also an impact on plant seedlings. Importantly, contrasting evolution from seeds to seedlings was observed for 3 strains of Pseudomonas fluorescens within the SynComs, underlining the importance of intra-species level diversity and precluding any generalization of results at species level. References Moreira, Z. P. M., Chen, M. Y., Ortuno, D. L. Y., & Haney, C. H. (2023). Engineering plant microbiomes by integrating eco-evolutionary principles into current strategies. Current Opinion in Plant Biology, 71, 102316. https://doi.org/10.1016/j.pbi.2022.102316 Simonin, M., Préveaux, A., Marais, C., Garin, T., Arnault, G., Sarniguet, A., & Barret, M. (2023). Transmission of synthetic seed bacterial communities to radish seedlings: impact on microbiota assembly and plant phenotype. bioRxiv, 2023-02. ver. 3 peer-reviewed and recommended by Peer Community in Microbiology. https://doi.org/10.1101/2023.02.14.527860 | Transmission of synthetic seed bacterial communities to radish seedlings: impact on microbiota assembly and plant phenotype | Marie Simonin, Anne Preveaux, Coralie Marais, Tiffany Garin, Gontran Arnault, Alain Sarniguet, Matthieu Barret | <p style="text-align: justify;">Seed-borne microorganisms can be pioneer taxa during germination and seedling emergence. Still, the identity and phenotypic effects of these taxa that constitute a primary inoculum of plant microbiota is mostly unkn... | Microbe-microbe and microbe-host interactions, Microbial ecology and environmental microbiology, Microbiomes | Sebastien Massart | 2023-02-15 10:27:26 | View | ||
29 Aug 2023
Comparative abundance and diversity of populations of the Pseudomonas syringae and Soft Rot Pectobacteriaceae species complexes throughout the Durance River catchment from its French Alps sources to its deltaC.E. Morris, C. Lacroix, C. Chandeysson, C. Guilbaud, C. Monteil, S. Piry, E. Rochelle Newall, S. Fiorini, F. Van Gijsegem, M.A. Barny, O. Berge https://doi.org/10.1101/2022.09.06.506731Treating all pathogens alike: a call for whole-catchment monitoring of plant-pathogensRecommended by Mina Bizic based on reviews by António Machado, Tiffany Lowe-Power ? and 1 anonymous reviewerPlant pathogens can cause devastating damage to crop (Strange and Scott 2005) greatly affecting a food resource in growing need on our planet. A significant proportion of global crops require irrigation, and with this, bare the risk of being affected by irrigation-borne pathogens (Lamichhane and Bartoli, 2015). Detection of plant pathogens in irrigation water can effectively be used to minimize this risk. River water makes up a major irrigation water source. Morris et al., (2023), propose monitoring whole river catchments to understand plant pathogen population dynamics and generate models to prevent outbreaks, similar to practices regarding water-borne human pathogens. Monitoring 270 km of the river Durance, Morris et al., (2023) reveal that two groups of bacteria known to host pathogenic strains, Pseudomonas syringae and the Soft Rot Pectobacteriaceae are present in relatively high numbers across the entire catchment or significant parts of it, respectively, with their abundance mostly correlated to water temperature. Nevertheless, despite their presence no major outbreaks have been reported in recent years. The authors suggest that the current environmental conditions in the lower, agriculture-dominated part of the catchment may not generate the necessary environment for an outbreak. Alternatively, as also suggested, though some potentially pathogenic variants were detected in the study, they may not match the crops currently grown in the area (Morris et al., 2023). The authors thus bring up the need for large scale monitoring and call for observations on potential land-use changes in the area that may alter the sensitive and seemingly stable conditions in such a way that outbreaks will be triggered. Change of land use, specifically from rural to agricultural use, has been repeatedly recognized to influence biodiversity (e.g., Ionescu et al., 2022). Furthermore, agricultural environments, with a dense network of irrigation channels, natural and man-made ponds, and larger reservoirs, will accelerate the spread of organisms through multiple biotic and abiotic vectors (Karnatak and Wollrab, 2020), and with this likely plant- (and other) pathogens. Overall, the work by Morris et al., (2023) highlights that studying the presence and distribution of plant pathogens in water used for irrigation across large areas, is bound to identify which potential pathogens are omnipresent, awaiting for the right condition for an outbreak; and which are rather spread from, isolated, local sources and thus can be effectively mitigated. References Strange, R. N., and Scott, P. R. (2005). Plant disease: a threat to global food security. Annu. Rev. Phytopathol. 43, 83–116. https://doi.org/10.1146/annurev.phyto.43.113004.133839 Lamichhane, J.R. and Bartoli, C. (2015), Plant pathogenic bacteria in open irrigation systems: what risk for crop health? Plant Pathol, 64: 757-766. https://doi.org/10.1111/ppa.12371 C.E. Morris, C. Lacroix, C. Chandeysson, C. Guilbaud, C. Monteil, S. Piry, Rochelle Newall E., S. Fiorini, F. Van Gijsegem, M.A. Barny, O. Berge (2023) Comparative abundance and diversity of populations of the Pseudomonas syringae and Soft Rot Pectobacteriaceae species complexes throughout the Durance River catchment from its French Alps sources to its delta. bioRxiv, 2022.09.06.506731, ver. 3 peer-reviewed and recommended by Peer Community in Microbiology. https://doi.org/10.1101/2022.09.06.506731 Ionescu, D., Bizic, M., Karnatak, R., Musseau, C. L., Onandia, G., Kasada, M., Berger, S. A., et al. (2022). From Microbes to Mammals: Pond Biodiversity Homogenization across Different Land-Use Types in an Agricultural Landscape. Ecological Monographs 92(3): e1523. https://doi.org/10.1002/ecm.1523 | Comparative abundance and diversity of populations of the *Pseudomonas syringae* and Soft Rot *Pectobacteriaceae* species complexes throughout the Durance River catchment from its French Alps sources to its delta | C.E. Morris, C. Lacroix, C. Chandeysson, C. Guilbaud, C. Monteil, S. Piry, E. Rochelle Newall, S. Fiorini, F. Van Gijsegem, M.A. Barny, O. Berge | <p style="text-align: justify;">Rivers, creeks, streams are integrators of biological, chemical and physical processes occurring in a catchment linking land cover from the headwaters to the outlet. The dynamics of human and animal pathogens in cat... | Microbial ecology and environmental microbiology | Mina Bizic | 2022-12-22 12:04:32 | View |
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Craig W. Herbold
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