Abstract
It is now clear that the root microbiome, which consists of bacteria, archaea, and fungi that colonize both the rhizosphere and the internal space of the root, is one of the most complex ecosystems in nature and is very important for root and plant health and function.
In this chapter we have focused on the role of the root microbiome functional traits in improvement of nutrient acquisition and abiotic stress tolerance, with a focus on drought stress, the biocontrol of root and shoot plant diseases, and the role of root-associated microbes in both producing plant growth-promoting hormones and impacting the plant hormone metabolism and signaling pathways to alter root growth. Additionally, we have also endeavored to give the readers an introduction into the rapid advances in this field, from the metagenomic analyses that now have become relatively routine for the study of “what is there” in the root microbiome, regarding microbial composition, diversity, and abundance, to nascent studies beginning to study the plant and microbial molecular and physiological mechanisms and processes that underlie how the microbiome is assembled, and how the microbiome confers improved functional crop traits. Furthermore, given the incredible complexity of this ecosystem, we discuss the recent research involving systems biology analysis of the root microbiome, which will be critical in deciphering the trait–function links and interactions between roots and soil microbes. Finally, we also discuss the agricultural and genetic interventions that are being employed to modify the root microbiome via inoculation of the seed and plant with potentially beneficial soil microbes, as well as the studies looking at the role of plant genetic and molecular variation in impacting the composition and function of the microbiome.
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Chandnani, R., Kochian, L.V. (2023). The Role of the Root Microbiome in the Utilization of Functional Traits for Increasing Plant Productivity. In: Chhabra, S., Prasad, R., Maddela, N.R., Tuteja, N. (eds) Plant Microbiome for Plant Productivity and Sustainable Agriculture . Microorganisms for Sustainability, vol 37. Springer, Singapore. https://doi.org/10.1007/978-981-19-5029-2_3
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