543 search results for “soil bacteria” in the Public website
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Soil bacteria can produce a wealth of new antibiotics
Soil bacteria can produce a wealth of antibiotics that are new to us, claims Gilles van Wezel, Professor of Molecular Biotechnology at the Institute of Biology Leiden. His research group has developed a method that can rapidly identify and produce these unknown compounds.
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Quest for new antibiotics
Gubbens
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Global Soil Biodiversity Atlas
For a first time the atlas maps the soil biodiversity of the entire planet, and provide s comprehensive analysis of human-induced threats to soil organisms and soil functioning, facilitating development of new policies to protect soil and soil organisms.
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Ecological functioning of bacterial chitinases in soil
Promotores: Prof.dr. H. van Veen & Prof.dr. W. de Boer (Wageningen University)
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Using soil inoculations for ecological restorations
How soil microbial composition impacts structure and composition of the aboveground plant and animal communities?
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discover how to improve the production of antibiotics and enzymes in soil bacteria
A team of researchers at the Institute of Biology Leiden, in collaboration with scientists from Utrecht University, has discovered a novel approach to improve the production of antibiotics and enzymes in the soil bacteria Streptomycetes.
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interactions in Jacobaea vulgaris: zooming in and zooming out from a plant-soil feedback perspective
In this thesis, I focused on studying the above- and belowground interactions of J. vulgaris from a plant-soil feedback (hereafter, PSF) perspective. I investigated the temporal variation of negative PSF and examined the effects of root-associated bacteria on plant performance and aboveground herbiv…
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Microbial communities in Pampa soils; impact of land use changes, soil type and climatic conditions
Promotor: J.A. van Veen, Co-promotor: E.E. Kuramae
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Understanding disease suppressive soils
Soil is a home for an unbelievable diversity and abundance of microbial life that is essential for supporting life on our planet.
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Unfolding the principles of genome folding and dynamics in bacteria
What are the principles of genome folding and dynamics in bacteria?
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Silva Nova – Restoring soil biology and soil functions to gain multiple benefits in new forests
We will study how inoculation of former arable land with soil (including the microbiome, soil fauna and seeds/rhizomes of ground flora) from old forests along with planting targeted tree species mixtures will improve productivity and more rapidly restore forest-adapted communities and ulttimately result…
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Soil legacy effects on aboveground plant-insect interactions
In this thesis, the role of plant-mediated soil legacy effects in shaping aboveground plant-insect interactions was investigated.
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Plant-soil interactions determine ecosystem aboveground and belowground processes in primary dune ecosystems
Soil biodiversity is of great importance for the maintenance of multifunctionality in terrestrial ecosystems.
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Linking soil microbial community dynamics to N2O emission after bioenergy residue amendments
Vinasse is a major by-product generated by the sugarcane biofuel industry. It is a source of microbes, nutrients and organic matter and often it is recycled as fertilizer.
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impact of defense hormones on the interaction between plants and the soil microbial community
The soil ecosystem consists of the largest reservoir of biodiversity on Earth.
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Soil and crop management options to improve nitrogen cycling on dairy farms on peat soil
The main research question of this thesis was: Can nitrogen cycling on dairy farms on peat soil in the Dutch Green Heart area be improved by adapting management to the nitrogen supply from soil and by using other grassland species and crops without affecting milk production?
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the root of variation: A metabolomics perspective to plant soil-feedback
By growing in a soil plants change the biotic and abiotic properties of the soil in which they grow.
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differ? Understanding the mechanisms of mycorrhizal fungal impacts on soil C sequestration
How presence, abundance and enzymatic activities of AM and EM fungi differently affect soil carbon sequestration processes?
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Microbial hitchhiking
How do nonmotile microbes leverage communal motility?
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Assemblage and functioning of bacterial communities in soil and rhizosphere
Promotores: J.A.van Veen, P.L.G.Klinkhamer. Co-promotor: E.E.Kuramae
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Learning from nature: using plant-soil feedback principles to improve growth and health of a horticultural crop
Plants and soils from natural ecosystems harbor great diversity of soil microorganisms, which could potentially contribute to the sustainability of horticulture. The knowledge about using wild plant species and soil from natural ecosystem to improve the crop health will advance the application of ecological…
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Living legacies: Influence of plant-mediated changes in soil communities on aboveground plant-insect interactions
We examine how soil-derived legacy effects of plants structure natural ecosystems, determine aboveground plant insect interactions, and how we can use soil legacy effects to restore degraded ecosystems.
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Modulation of plant chemistry by rhizosphere bacteria
Plant-microbe interaction resulted in different physio/chemical responses by host plant and interacting rhizobacteria.
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Bioorthogonal Labeling Tools to Study Pathogenic Intracellular Bacteria
In this thesis, bioorthogonal chemistry is combined with correlative light-electron microscopy to selectively label and study pathogenic intracellular bacteria within the host immune cell.
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Agriculture on Loess Soils West of the Rhine
Archaeobotanic research by prof. dr. C. Bakels and students on agriculture.
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New antibiotics
Pathogenic bacteria are increasingly resistant to today’s antibiotics. Professor Gilles van Wezel seeks new forms of antibiotics in good bacteria that live in the soil.
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Modelling the role of mycorrhizal associations in soil carbon cycling: insights from global analyses of mycorrhizal vegetation
In this PhD study, I aim to deepen our understanding of the influence of major mycorrhizal types, namely arbuscular mycorrhizae (AM) and ectomycorrhizae (EM), on the global soil carbon cycle and their potential distribution changes under future environmental shifts.
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New insights into the production of antibiotics by bacteria
Bacteria use antibiotics as a weapon and even produce more antibiotics if there are competing strains nearby. This is a fundamental insight that can help find new antibiotics. Leiden scientists Daniel Rozen and Gilles van Wezel published their research results in the authoritative Proceedings of the…
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The Ecology and Evolution of Microbial Warfare in Streptomyces
The soil-dwelling, filamentous bacteria of the genus Streptomyces are renowned for their production of useful secondary metabolites including antibiotics. The work described in this thesis provides new insights on the role and regulation of antibiotic production and resistance in these bacteria.
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Impact of nitrogen fertilization on the soil microbiome and greenhouse gas emission
The use of N fertilizers has increased worldwide in the past century. While this increased input of N has increased food productivity, it has also contributed to decreases in biodiversity, soil quality and environmental health, including increases in greenhouse gas emissions.
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Volatile compounds from Actinobacteria as mediators of microbial interactions
Streptomyces are bacteria abundant in soil that participate in diverse and complex interactions. These bacteria are the main producers of the antibiotics we currently use in the clinic.
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Harnessing the soil microbiome for improved stress tolerance in crop plants
Which compounds and microorganisms that live near and inside plant roots are beneficial? Can we use this knowledge to improve the health and growth of crop plants?
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Linking aboveground-belowground interactions and plant-soil feedback to improve pest control and sustainability in greenhouse cut-flowers
We examine how soil inoculation influences aboveground organisms (i) directly, and indirectly via (ii) its effects on plant chemistry or volatile emission, or via (iii) mediating the effects of belowground pathogens on aboveground organisms via the shared plant.
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Wanted: bacteria that allow plants to flourish
Plants love favourable microbes such as bacteria and fungi: they grow better and become healthier. Jos Raaijmakers, Professor of Microbial Ecology, is in search of the right microbes to be used in agriculture. Inaugural lecture 13 November.
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Potentiation of Gram-positive specific antibiotics against Gram-negative bacteria through outer membrane disruption
Extending our current arsenal of antibiotics is key to staying ahead in the arms race between humans and resistant bacteria.
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Researchers discover hitchhiking bacteria
Imagine that you need to travel, but you don’t have a car and you’re dead broke. What do you do? Hitchhiking, of course! Leiden biologists found that certain bacteria use this very same tactic: their spores hop on motile bacteria and use them as a taxi, ensuring they reach the right environment to f…
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Ecologist Emilia Hannula receives Gold Medal in Teylers Museum
Soil ecologists Emilia Hannula (Leiden) and Elly Morriën (UvA) received the Golden Medal of Teylers Tweede Genootschap on 5 November. They received the prize for their submission to a competition on sustainable soil management.
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Worm and stomach bacteria: our allies in the battle against allergic asthma
Parasitic worms and stomach bacteria suppress immune reactions such as allergic responses. Parasitologist Hermelijn Smits and lung specialist Christian Taube from the LUMC are trying to learn from these micro-organisms.
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Discovery of antibiotics and their targets in multidrug-resistant bacteria
Global healthcare is on the verge of an antibiotic availability crisis as bacteria have evolved resistance to nearly all known antibacterials. Identifying new antibiotics that operate via novel modes-of-action is therefore of high priority.
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Altruism in bacteria: colonies divide the work
Bacteria found in soil specialise in the colony by division of labour. Some of the bacteria produce antibiotics, even when it comes at the expense of their individual reproduction success, to defend their colony against competitors. Publication in Science Advances.
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Molecular characterization of copper-dependent enzymes involved in Streptomyces morphology
Promotor: G.P. van Wezel, Co-promotor: D. Claessen
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Caterpillars listen to voicemail by eating soil
Leaf-eating caterpillars greatly enrich their intestinal flora by eating soil. Even effects of plants that previously grew in that soil can be found back in bacteria and fungi in caterpillars. Researchers from the Netherlands Institute of Ecology (NIOO-KNAW) and Leiden University write about this discovery…
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Bacteria evolve gambling behaviour
In an unpredictable environment bacteria evolve the same strategy as shareholders who try to protect themselves against unpredictable swings in the stock market. Experimental evolution biologist Dr Bertus Beaumont published an article on this discovery on 5 November in the journal Nature.
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Isabel Siles Asaff
Science
m.i.siles.asaff@cml.leidenuniv.nl | +31 71 527 2727
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Breaking the witches' spell: towards steering the soil microbiome for volatile-mediated control of the root parasitic weed Striga
Striga hermonthica, commonly known as witchweed, infests major cereal crops in Sub-Saharan Africa causing severe yield losses and threatening the livelihood of millions of resource poor farmers.
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Konstantinos Georgopoulos
Science
k.georgopoulos@biology.leidenuniv.nl | +31 71 527 5114
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Gilles van Wezel
Science
g.wezel@biology.leidenuniv.nl | +31 71 527 4310
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The rhizomicrobiome of Sorghum ; impact on plant growth and stress tolerance
The overall objectives of my thesis are to investigate the dynamics of the sorghum root microbiome and to explore the beneficial effects of the root microbiome on sorghum growth and stress tolerance.
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Morphogenesis and heterogeneity in liquid-grown streptomyces cultures
The filamentous bacteria Streptomyces are widespread inhabitants of terrestrial soils.
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Thousands of images of frozen bacteria
How do bacteria sense and adapt to their environment? Ariane Briegel, Professor of Ultrastructural Biology, is intrigued by this question. Using new techniques, she produces three-dimensional images of bacteria that provide us with new clues about their sensory system.