Soil-plant-microbiota interactions to enhance plant growth

Abstract

The nature of the soil is shaped by the presence of roots and the soil microbiota. Bacteria, archaea and fungi profoundly alter plant growth and, in turn, depend on root exudation of carbon-rich and energy-yielding compounds. The microbial communities act as facilitators of plant processes by secreting plant growth regulators, solubilizing minerals, providing N for plant growth, altering plant immune responses and competing with plant pathogens. Characterizing and engineering the processes driven by the multiple microbial taxa that make up a "plant growth-promoting soil" represents an ecologically friendly solution that may lead to unprecedented increases in agronomic efficiency. This review outlines the characteristics of soil-plant-microbiota interactions that would lead to enhanced plant growth and the importance of characterizing the soil microbial communities with metabarcoding and shotgun metagenomics allied to machine learning analytics. Although much is still needed to be understood about soil microbial ecology, it is possible to choose the best soil management practices to take advantage of beneficial microbial activity with our current knowledge.

Meta-omics integration approach reveals the effect of soil native microbiome diversity in the performance of inoculant Azospirillum brasilense

“…Understanding PGPB-plant-microbiome interactions is vital to improve strain selection, inoculant formulation and technologies of application of bioproducts, and optimize the soil microbiome through agricultural practices ( Volpiano et al., 2022 ). Most of the current knowledge about the rhizobiome is limited to microbial community composition, but little is known regarding PGPB-native soil microbial community function in association with host plants ( Castellano-Hinojosa and Strauss, 2021 ; Wang et al., 2021 ).…”

Comparison of the diversity and structure of the rhizosphere microbial community between the straight and twisted trunk types of Pinus yunnanensis

“…Moreover, our study revealed that trunk type explained 6.79 and 3.79% of the variance in bacterial (P = 0.02) and fungal communities, respectively. Perhaps the variance in microbial communities was determined by P. yunnanensis secreting compounds that specifically stimulate or inhibit the members of the microbial community (Bais et al, 2006;Arafat et al, 2017;Vives-Peris et al, 2020;Volpiano et al, 2022). In summary, we considered the soil environment, P. yunnanensis and microorganisms to interact and influence each other.…”

Vertical migration of nutrients and water-soluble organic matter in the soil profile under pre-sowing seed treatment with plant growth promoting rhizobacteria

“…There is no doubt about their positive influence on the growth and development of crops, possessing either direct or indirect influence on their productivity. The effect of PGPR is largely associated with the processes of molecular nitrogen fixation, solubilization of phosphorus compounds, production of siderophores, physiologically active substances, including plant hormones, enhancement of nutrient uptake by plants, improvement of the general plant health by the synthesis of 1-aminocyclopropane-1-carboxylate (ACC) deaminase, which contributes to the crop tolerance to drought, soil salinity and heavy metal contamination (Bashan and Holguin, 2002;Volkogon et al, 2006;Lugtenberg and Kamilova, 2009;Babalola, 2010;Martínez-Viveros et al, 2010;O'Callaghan, 2016;Di Benedetto et al, 2017;Olanrewaju et al, 2017;Di Salvo et al, 2018;Jeyanthi and Kanimozhi, 2018;Khanna et al, 2019;Ilyas et al, 2020;Trivedi et al, 2020;Santoyo et al, 2021;Yasmin et al, 2021Yasmin et al, , 2022Adedayo et al, 2022;Figueiredo et al, 2022;Volpiano et al, 2022). However, most studies of the PGPR do not question their effect on soil fertility in terms of the formation of nutrient reserves, as it is a priori believed that inoculation contributes to the improvement of soil fertility.…”