6 research outputs found
Novel and Emerging Capabilities that Can Provide a Holistic Understanding of the Plant Root Microbiome
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Root–soil–microbe interactions mediating nutrient fluxes in the rhizosphere
Plant roots have both direct and indirect effects on nutrient availabilities and fluxes in rhizosphere soil. Direct effects include impacts that are a consequence of root growth, water/nutrient uptake and secretion of compounds that promote solubility of poorly available elements such as phosphorus and iron. Indirect effects are largely a consequence of plant–microbe interactions, mediated by the release of organic compounds from roots that both shape rhizosphere microbial community structure and promote microbial nutrient cycling activity. In recent years, significant advances have been made in the quantification of root-mediated impacts on soil biogeochemical processes, demonstrating the importance of these interactions for nutrient cycling to support plant productivity and as a critical control point for the response of soils to environmental change. This is now supplemented with an appreciation that there is a strong element of regulation, both plant and microbial, in how the underlying interactions are established and maintained. This raises the exciting possibility that management of root–microbiota interactions could be a realistic means of improving plant health and productivity, while potentially also mitigating environmental impacts. This chapter discusses progress in quantifying root impacts on soil processes and parallel advances in characterising the specificity of the plant-driven selection of associated microbiota. A clear opportunity for future research is to combine these approaches, functional -omics technologies and bioinformatics to guide next-generation crop breeding that targets both the plant and its associated microbiota (i.e. the holobiont), for productivity and resilience in sustainable agricultural systems
Increasing the Size of the Microbial Biomass Altered Bacterial Community Structure which Enhances Plant Phosphorus Uptake
Beneficial soil microbiome for sustainable agricultural production
The projected increase in world population and the need to reduce the
reliance on non-renewable inputs, such as synthetic agrochemicals, are challenging
the current vision of agriculture. In particular, to achieve a fair and sustainable
global food security, disruptive changes in crop production are unavoidable.
A promising strategy proposes to exploit the metabolic capabilities of soil microbial
communities, i.e., the microbiome, to conjugate stable yield with reduced impact on
the agroecosystem. In this chapter, we introduce the microbiome populating the root-soil interface from an evolutionary perspective. Next, we discuss the molecular
bases of plant-microbe interactions in soil and how these interactions impact plant
growth, development and health. We illustrate how plant-probiotic members of the
microbiome can be isolated from soil and further characterized for their biological
activities, a key pre-requisite for translational applications. In addition, we focus on
paradigmatic examples of soil microbes turned into inoculants for agriculture, their
fate on soil, their impact on the native microbiome and the beneficial effects exerted
on crop productio