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Plant-microbe relationships. --- Plant-microbe interactions --- Plants --- Microbiology

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Nanoparticles and Plant-Microbe Interactions: An Environmental Perspective, Volume Seven in the Nanomaterial-Plant Interactions series, provides comprehensive coverage on how nanoparticles can impact plant-microbe interactions. Key themes include nanoparticle synthesis, nano-phytoremediation, nano-farming, the negative impacts of nanoparticles, and nanomaterials in mitigating stress. This will be an essential read for any scientist or researcher looking to assess and understand the potential toxicological risks associated with plant nanotechnology, with particular focus on plant-microbe interactions. Nanotechnology is an emerging field with a vast range of nano-based products for commercial exploitation. The interactions of nanoparticles, plants and microbes can be harnessed in several applications, including alleviating environmental pollution. In addition to the aforementioned content, the book also explores concerns surrounding the toxicity of nanoparticles themselves, an important aspect to be aware, along with potential negative effects. Discusses the latest advances in the use of nanotechnology in plants and plant-microbe interactions Considers the potential negative impacts of nanotechnology on the environment Presents the applications of nanomaterials, including their role in stress mitigation.

Plant-microbe relationships. --- Plant-microbe interactions --- Plants --- Microbiology --- Nanoparticles --- Environmental aspects.

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This manual details the techniques involved in the study of plant microbe interactions (PMI). Covering a wide range of basic and advanced techniques associated with research on biological nitrogen fixation, microbe-mediated plant nutrient use efficiency, the biological control of plant diseases and pests such as nematodes, it will appeal to postgraduate students, research scholars and postdoctoral fellows, as well as teachers from various fields, including pathology, entomology and agronomy.

Plant-microbe relationships. --- Plant-microbe interactions --- Plants --- Microbiology --- Life sciences. --- Biosciences --- Sciences, Life --- Science

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The members of the Streptomyces genus are mainly known for their high potential to produce secondary metabolites such as antibiotics, anti-cancer drugs, volatile organic compounds, herbicides. Mostly saprophytic, few exceptions have a phytopathogenic lifestyle, with S. scabies as a model species. Research on the pathogenicity of this bacteria - the predominant causal agent of the common scab (CS) disease – has begun more than 20 years ago. The phytotoxin thaxtomin A is the main virulence factor directly related to its pathogenic lifestyle, however many molecular mechanisms still remain misunderstood and ignored. Based on computational regulon prediction and proteomics, novel gene/protein candidates involved in the development of the virulent behaviour of S. scabies have been identified. In particular, a new hypothetical signalling pathway suggesting a tight link between the cello-oligosaccharides transport and the access to the host reservoir of starch has been proposed.
The principal aim of this Master thesis was to investigate the role of two actors supposed to be involved in this pathway - the MalR regulator and the cytoplasmic component of the AfsQ1-AfsQ2 TCS -, evaluating the effects of their deletion through the PCR-targeting strategy. During this Master thesis we showed that these two important regulators certainly participate in the pathogenic lifestyle of S. scabies. The absence of MalR prevents S. scabies from perceiving the cellobiose as a signal to trigger virulence, while afsQ1 deletion resulted in increased toxin production rates, in a significant impairment of A. thaliana growth and in more severe pitting and necrosis of potato tuber slices.
A further objective of this work aimed to generate new strains of S. scabies with improved thaxtomin production yields. Indeed, the properties of this phytotoxin made it a prime candidate as bioherbicide, however, nowadays the production costs are still too high for a large-scale application. Earlier works have shown that the mutation of either cebR or bglC genes resulted in an overproduction of thaxtomin A, therefore we have investigated the possibility that combining the deletion of both genes would turn in even higher production rates. The new generated strains are capable of producing significant toxin rates, however, although significant, did not exceed those of the single mutants.

common scab disease --- plan pathogen --- regulatory networks --- plant-microbe interactions --- herbicide --- Sciences du vivant > Microbiologie

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This book is about the role played by microbes in their community mode in sustaining ecosystems. The descriptions given in its chapters indicate clearly that microbial communities are more effective in delivering multifaceted benefits to the soil-plant system than those offered by microbial monocultures in planktonic modes. The role these communities play in a multitude of microbe-microbe and plant-microbe interactions have not yet been fully exploited to gain benefits in this field as well as to achieve sustainability in agriculture practices. Amply discussed are the beneficial characteristics and metabolic capacities of specific microbial groups and the use of microbial traits for the benefit of plant growth. The book suggests the need to develop new microbial technologies to utilize plant-associated microbes for increased crop productivity and agroecosystem balance in order to ensure sustainability. This also provides an effective guidance to scientists, academics, researchers, students and policy makers of the sphere to achieve the above outcomes.

Microbiology. --- Biotechnology. --- Microbial ecology. --- Microbial Ecology. --- Environmental microbiology --- Microorganisms --- Ecology --- Microbiology --- Chemical engineering --- Genetic engineering --- Microbial biology --- Biology --- Plant-microbe relationships. --- Plant-microbe interactions --- Plants