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Plant microbial interaction

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https://www.readbyqxmd.com/read/28802129/interactions-of-two-novel-stabilizing-amendments-with-sunflower-plants-grown-in-a-contaminated-soil
#1
Zuzana Michálková, Domingo Martínez-Fernández, Michael Komárek
Several efficient stabilizing amendments have been recently proposed for the remediation of metal(loid)-contaminated soils. However, information on their interactions with plants, which is a crucial factor in soil environments, are still scarce. An amorphous manganese oxide (AMO) synthesized from organic compounds and nano zerovalent iron (nZVI) have been previously tested as promising stabilizing agents usable both for the stabilization of metals and As. Experiments with rhizoboxes were performed in order to evaluate their influence on the mobility of metal(loid)s in the bulk soil and rhizosphere of sunflower (Helianthus annuus L...
August 4, 2017: Chemosphere
https://www.readbyqxmd.com/read/28799900/establishing-causality-opportunities-of-synthetic-communities-for-plant-microbiome-research
#2
REVIEW
Julia A Vorholt, Christine Vogel, Charlotte I Carlström, Daniel B Müller
Plant microbiome research highlights the importance of indigenous microbial communities for host phenotypes such as growth and health. It aims to discover the molecular basis by which host-microbe and microbe-microbe interactions shape and maintain microbial communities and to understand the role of individual microorganisms, as well as their collective ecosystem function. Here, we discuss reductionist approaches to disentangle the inherent complexity of interactions in situ. Experimentally tractable, synthetic communities enable testing of hypotheses by targeted manipulation in gnotobiotic systems...
August 9, 2017: Cell Host & Microbe
https://www.readbyqxmd.com/read/28797279/huanglongbing-impairs-the-rhizosphere-to-rhizoplane-enrichment-process-of-the-citrus-root-associated-microbiome
#3
Yunzeng Zhang, Jin Xu, Nadia Riera, Tao Jin, Jinyun Li, Nian Wang
BACKGROUND: Roots are the primary site for plant-microbe interactions. Among the three root-associated layers (i.e., rhizosphere, rhizoplane, and endorhiza), the rhizoplane is a key component serving a critical gating role that controls microbial entry into plant roots. The microbial communities colonizing the three layers are believed to be gradually enriched from the bulk soil inoculum. However, it is unknown how this enrichment process, particularly the rhizosphere to rhizoplane step, is affected by biotic stresses, such as disease...
August 10, 2017: Microbiome
https://www.readbyqxmd.com/read/28791444/design-and-development-of-a-workflow-for-microbial-spray-formulations-including-decision-criteria
#4
Ana Bejarano, Ursula Sauer, Claudia Preininger
Herein, we present a workflow for the development of talc-based microbial inoculants for foliar spray consisting of four steps. These include together with decision-making criteria (1) the selection of additives based on their capability to wet juvenile maize leaves, (2) their adhesion on the plant, (3) their interaction with the biological systems, and (4) the choice of thickener for good dispersion stability. In total, 29 additives including polysaccharides and proteins, polyols, glycosides, oils, waxes, and surfactants (e...
August 8, 2017: Applied Microbiology and Biotechnology
https://www.readbyqxmd.com/read/28779901/plant-pathogen-maneuvering-over-apoplastic-sugars
#5
Muhammad Naseem, Meik Kunz, Thomas Dandekar
The nutrient-rich extracellular plant compartment, the apoplast, is an attractive niche for attacks by microbial pathogens. Here, we highlight recent trends in plant-pathogen competition for apoplastic sugars in the context of innate immune responses in various plant-pathogen interaction systems.
August 2, 2017: Trends in Plant Science
https://www.readbyqxmd.com/read/28769920/unraveling-the-microbial-interactions-and-metabolic-potentials-in-pre-and-post-treated-sludge-from-a-wastewater-treatment-plant-using-metagenomic-studies
#6
Chandni Sidhu, Surendra Vikram, Anil Kumar Pinnaka
Sewage waste represents an ecosystem of complex and interactive microbial consortia which proliferate with different kinetics according to their individual genetic as well as metabolic potential. We performed metagenomic shotgun sequencing on Ion-Torrent platform, to explore the microbial community structure, their biological interactions and associated functional capacity of pre-treated/raw sludge (RS) and post-treated/dried sludge (DS) of wastewater treatment plant. Bacterial phylotypes belonging to Epsilonproteobacteria (∼45...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/28768498/effect-of-volatile-compounds-produced-by-ralstonia-solanacearum-on-plant-growth-promoting-and-systemic-resistance-inducing-potential-of-bacillus-volatiles
#7
Hafiz Abdul Samad Tahir, Qin Gu, Huijun Wu, Waseem Raza, Asma Safdar, Ziyang Huang, Faheem Uddin Rajer, Xuewen Gao
BACKGROUND: Microbial volatiles play an expedient role in the agricultural ecological system by enhancing plant growth and inducing systemic resistance against plant pathogens, without causing hazardous effects on the environment. To explore the effects of VOCs of Ralstonia solanacearum TBBS1 (Rs) on tobacco plant growth and on plant growth promoting efficiency of VOCs produced by Bacillus subtilis SYST2, experiments were conducted both in vitro and in planta. RESULTS: The VOCs produced by SYST2 significantly enhanced the plant growth and induced the systemic resistance (ISR) against wilt pathogen Rs in all experiments...
August 2, 2017: BMC Plant Biology
https://www.readbyqxmd.com/read/28757147/steering-soil-microbiomes-to-suppress-aboveground-insect-pests
#8
REVIEW
Ana Pineda, Ian Kaplan, T Martijn Bezemer
Soil-borne microbes affect aboveground herbivorous insects through a cascade of molecular and chemical changes in the plant, but knowledge of these microbe-plant-insect interactions is mostly limited to one or a few microbial strains. Yet, the soil microbial community comprises thousands of unique taxa interacting in complex networks, the so-called 'microbiome', which provides plants with multiple beneficial functions. There has been little exploration of the role and management of whole microbiomes in plant-insect interactions, calling for the integration of this complexity in aboveground-belowground research...
July 27, 2017: Trends in Plant Science
https://www.readbyqxmd.com/read/28755910/reprint-of-fast-and-sensitive-in-vivo-studies-under-controlled-environmental-conditions-to-substitute-long-term-field-trials-with-genetically-modified-plants
#9
Patricia Horn, André Schlichting, Christel Baum, Ute Hammesfahr, Sören Thiele-Bruhn, Peter Leinweber, Inge Broer
We introduce an easy, fast and effective method to analyze the influence of genetically modified (GM) plants on soil and model organisms in the laboratory to substitute laborious and time consuming field trials. For the studies described here we focused on two GM plants of the so-called 3rd generation: GM plants producing pharmaceuticals (PMP) and plant made industrials (PMI). Cyanophycin synthetase (cphA) was chosen as model for PMI and Choleratoxin B (CTB) as model for PMP. The model genes are expressed in transgenic roots of composite Vicia hirsuta plants grown in petri dishes for semi-sterile growth or small containers filled with non-sterile soil...
July 26, 2017: Journal of Biotechnology
https://www.readbyqxmd.com/read/28750287/operation-driven-heterogeneity-and-overlooked-feed-associated-populations-in-global-anaerobic-digester-microbiome
#10
Ran Mei, Masaru K Nobu, Takashi Narihiro, Kyohei Kuroda, Julian Muñoz Sierra, Zhuoying Wu, Lin Ye, Patrick K H Lee, Po-Heng Lee, Jules B van Lier, Michael J McInerney, Yoichi Kamagata, Wen-Tso Liu
Anaerobic digester (AD) microbiomes harbor complex, interacting microbial populations to achieve biomass reduction and biogas production, however how they are influenced by operating conditions and feed sludge microorganisms remain unclear. These were addressed by analyzing the microbial communities of 90 full-scale digesters at 51 municipal wastewater treatment plants from five countries. Heterogeneity detected in community structures suggested that no single AD microbiome could be defined. Instead, the AD microbiomes were classified into eight clusters driven by operating conditions (e...
July 20, 2017: Water Research
https://www.readbyqxmd.com/read/28747705/soil-nutritional-status-and-biogeography-influence-rhizosphere-microbial-communities-associated-with-the-invasive-tree-acacia-dealbata
#11
Casper N Kamutando, Surendra Vikram, Gilbert Kamgan-Nkuekam, Thulani P Makhalanyane, Michelle Greve, Johannes J Le Roux, David M Richardson, Don Cowan, Angel Valverde
Invasiveness and the impacts of introduced plants are known to be mediated by plant-microbe interactions. Yet, the microbial communities associated with invasive plants are generally poorly understood. Here we report on the first comprehensive investigation of the bacterial and fungal communities inhabiting the rhizosphere and the surrounding bulk soil of a widespread invasive tree, Acacia dealbata. Amplicon sequencing data indicated that rhizospheric microbial communities differed significantly in structure and composition from those of the bulk soil...
July 26, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28743967/pathogen-recognition-in-compatible-plant-microbe-interactions
#12
Fabio Rezzonico, Oliver Rupp, Johannes Fahrentrapp
Microbial infections in plant leaves remain a major challenge in agriculture. Hence an understanding of disease mechanisms at the molecular level is of paramount importance for identifying possible intervention points for their control. Whole-transcriptome changes during early disease stages in susceptible plant species are less well-documented than those of resistant ones. This study focuses on the differential transcriptional changes at 24 hours post inoculation (hpi) in tomato leaflets affected by three pathogens: (1) Phytophthora infestans, (2) Botrytis cinerea, and (3) Oidium neolycopersici...
July 25, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28740172/bottom-up-effects-on-herbivore-induced-plant-defences-a-case-study-based-on-compositional-patterns-of-rhizosphere-microbial-communities
#13
Emilio Benítez, Daniel Paredes, Estefanía Rodríguez, Diana Aldana, Mónica González, Rogelio Nogales, Mercedes Campos, Beatriz Moreno
Below-ground soil microorganisms can modulate above-ground plant-insect interactions. It still needs to be determined whether this is a direct effect of single species or an indirect effect of shifts in soil microbial community assemblages. Evaluation of the soil microbiome as a whole is critical for understanding multi-trophic interactions, including those mediated by volatiles involving plants, herbivorous insects, predators/parasitoids and microorganisms. We implemented a regulated system comprising Nerium oleander plants grown in soil initially containing a sterile/non sterile inoculum, herbivore Aphis nerii and predator Chrysoperla carnea...
July 24, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28735425/influence-of-host-plant-on-thaumetopoea-pityocampa-gut-bacterial-community
#14
Cinzia P Strano, Antonino Malacrinò, Orlando Campolo, Vincenzo Palmeri
Microbial communities associated to the gut of insects are attracting an increasing interest, mainly because of their role in influencing several host life-traits. The characterization of the gut microbial community is pivotal for understanding insect ecology and, thus, to develop novel pest management strategies. The pine processionary moth, Thaumetopoea pytiocampa (Denis & Schiff.) (Lepidoptera: Thaumetopoeidae), is a severe defoliator of pine forests, able to feed on several pine species. In this work, we performed a metabarcoding analysis to investigate, for the first time, the diversity of the gut bacterial community of pine processionary larvae associated with three different host pine species (Pinus halepensis, Pinus nigra subsp...
July 22, 2017: Microbial Ecology
https://www.readbyqxmd.com/read/28732267/understanding-the-holobiont-the-interdependence-of-plants-and-their-microbiome
#15
REVIEW
Carmen Sánchez-Cañizares, Beatriz Jorrín, Philip S Poole, Andrzej Tkacz
The holobiont is composed by the plant and its microbiome. In a similar way to ecological systems of higher organisms, the holobiont shows interdependent and complex dynamics [1,2]. While plants originate from seeds, the microbiome has a multitude of sources. The assemblage of these communities depends on the interaction between the emerging seedling and its surrounding environment, with soil being the main source. These microbial communities are controlled by the plant through different strategies, such as the specific profile of root exudates and its immune system...
July 18, 2017: Current Opinion in Microbiology
https://www.readbyqxmd.com/read/28729641/the-rhizosphere-microbiome-of-burned-holm-oak-potential-role-of-the-genus-arthrobacter-in-the-recovery-of-burned-soils
#16
Antonio J Fernández-González, Pilar Martínez-Hidalgo, José F Cobo-Díaz, Pablo J Villadas, Eustoquio Martínez-Molina, Nicolás Toro, Susannah G Tringe, Manuel Fernández-López
After a forest wildfire, the microbial communities have a transient alteration in their composition. The role of the soil microbial community in the recovery of an ecosystem following such an event remains poorly understood. Thus, it is necessary to understand the plant-microbe interactions that occur in burned soils. By high-throughput sequencing, we identified the main bacterial taxa of burnt holm-oak rhizosphere, then we obtained an isolate collection of the most abundant genus and its growth promoting activities were characterised...
July 20, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28724405/environmental-drivers-of-viral-community-composition-in-antarctic-soils-identified-by-viromics
#17
Evelien M Adriaenssens, Rolf Kramer, Marc W Van Goethem, Thulani P Makhalanyane, Ian Hogg, Don A Cowan
BACKGROUND: The Antarctic continent is considered the coldest and driest place on earth with simple ecosystems, devoid of higher plants. Soils in the ice-free regions of Antarctica are known to harbor a wide range of microorganisms from primary producers to grazers, yet their ecology and particularly the role of viruses is poorly understood. In this study, we examined the virus community structures of 14 soil samples from the Mackay Glacier region. METHODS: Viral communities were extracted from soil and the dsDNA was extracted, amplified using single-primer amplification, and sequenced using the Ion Torrent Proton platform...
July 19, 2017: Microbiome
https://www.readbyqxmd.com/read/28722121/the-importance-of-species-identity-and-interactions-on-multifunctionality-depends-on-how-ecosystem-functions-are-valued
#18
Eleanor M Slade, Laura Kirwan, Thomas Bell, Christopher Philipson, Owen T Lewis, Tomas Roslin
Studies investigating how biodiversity affects ecosystem functioning increasingly focus on multiple functions measured simultaneously ('multifunctionality'). However, few such studies assess the role of species interactions, particularly under alternative environmental scenarios, despite interactions being key to ecosystem functioning. Here we address five questions of central importance to ecosystem multifunctionality using a terrestrial animal system: 1) Does the contribution of individual species differ for different ecosystem functions?; 2) Do inter-species interactions affect the delivery of single functions and multiple functions?; 3) Does the community composition which maximises individual functions also maximise multifunctionality?; 4) Is the functional role of individual species, and the effect of interspecific interactions, modified by changing environmental conditions?; and 5) How do these roles and interactions change under varying scenarios where ecosystem services are weighted to reflect different societal preferences? We manipulated species' relative abundance in dung beetle communities and measured 16 functions contributing to dung decomposition, plant productivity, nutrient recycling, reduction of greenhouse gases, and microbial activity...
July 19, 2017: Ecology
https://www.readbyqxmd.com/read/28715992/the-hibernator-microbiome-host-bacterial-interactions-in-an-extreme-nutritional-symbiosis
#19
Hannah V Carey, Fariba M Assadi-Porter
Animals that undergo seasonal cycles of feeding and fasting have adaptations that maintain integrity of organ systems when dietary nutrients are lacking. Food deprivation also challenges the gut microbiota, which relies heavily on host diet for metabolic substrates and the gastrointestinal tract, which is influenced by enteral nutrients and microbial activity. Winter fasting in hibernators shifts the microbiota to favor taxa with the capacity to degrade and utilize host-derived substrates and disfavor taxa that prefer complex plant polysaccharides...
July 17, 2017: Annual Review of Nutrition
https://www.readbyqxmd.com/read/28712045/dynamics-of-soil-bacterial-communities-over-a-vegetation-season-relate-to-both-soil-nutrient-status-and-plant-growth-phenology
#20
Davide Francioli, Elke Schulz, François Buscot, Thomas Reitz
Soil microorganisms regulate element cycling and plant nutrition, mediate co-existence of neighbors, and stabilize plant communities. Many of these effects are dependent upon environmental conditions and, in particular, on nutrient quality and availability in soils. In this context, we set up a pot experiment in order to examine the combined effects of soil nutrient availability and microbial communities on plant-soil interactions and to investigate assemblage rules for soil bacterial communities under changed nutrient conditions...
July 15, 2017: Microbial Ecology
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