Root Microbiome Structure and Microbial Succession in the Rhizosphere

Richardson, Alan; Kawasaki, Akitomo; Condron, Leo M.; Ryan, Peter R.; Gupta, V. V. S. R.

doi:10.1007/978-981-15-6125-2_5

Cited by 15 publications

(16 citation statements)

References 80 publications

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“…Currently our understanding of the performance of PSM across different host species is relatively limited (Khan et al ., 2009). Inoculated PSM must express their P‐solubilising traits in the rhizosphere if plant roots are to benefit from immediately solubilised P. There is higher growth potential for PSM in the rhizosphere than in bulk soil, as root exudates contain readily metabolisable hexose sugars, OA and amino acids (Richardson et al ., 2020). However, the rhizosphere is also markedly depleted for available orthophosphate in solution where there is considerable competition for P for either plant or microbial uptake (Jakobsen et al ., 2005).…”

Section: Factors Potentially Affecting Success or Failure Of Psm Inocmentioning

confidence: 99%

Phosphate‐solubilising microorganisms for improved crop productivity: a critical assessment

Raymond¹,

Gómez‐Muñoz

Bom³

et al. 2020

New Phytologist

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143

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Summary Phosphate‐solubilising microorganisms (PSM) are often reported to have positive effects on crop productivity through enhanced phosphorus (P) nutrition. Our aim was to evaluate the validity of this concept. Most studies that report ‘positive effects’ of PSM on plant growth have been conducted under controlled conditions, whereas field experiments more frequently fail to demonstrate a positive response. Many studies have indicated that the mechanisms seen in vitro do not translate into improved crop P nutrition in complex soil–plant systems. Furthermore, associated mechanisms are often not rigorously assessed. We suggest that PSM do not mobilise sufficient P to change the crops’ nutritional environment under field conditions. The current concept, in which PSM solubilise P ‘for the plant’ should thus be revised. Although PSM have the capacity to solubilise P to meet their own needs, it is the turnover of the microbial biomass that subsequently provides P to plants over a longer time. Therefore, the existing concept of PSM function is unlikely to deliver a reliable strategy for increasing crop P nutrition. A further mechanistic understanding is needed to determine how P mobilisation by PSM as a component of the whole soil community can be manipulated to become more effective for plant P nutrition.

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Section: Factors Potentially Affecting Success or Failure Of Psm Inocmentioning

confidence: 99%

Phosphate‐solubilising microorganisms for improved crop productivity: a critical assessment

Raymond¹,

Gómez‐Muñoz

Bom³

et al. 2020

New Phytologist

Self Cite

143

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“…Recent data has shown that root type and location influence the composition and diversity of the communities of bacterial, fungal, and actinobacterial, including specialized functional groups like arbuscular mycorrhizal fungi, across a wide range of plant species. Differences in root assembly and the quantity and composition of root exudates, as well as plant-microbe, microbemicrobe, and microbe-fauna interactions, all contribute to these variances (Richardson et al, 2021). The importance of interactions between plants and their phyllosphere microbes is gaining attention, as they stimulate plant development and contribute to pathogen defense, these may later alter the suitability of natural plant inhabitants along with the quality and production of agricultural products.…”

Section: The Plant-soil Feedback: Essential Tools In Microbiome Manag...mentioning

confidence: 99%

“…A greater understanding of the root microbiome succession, such as how the microbes vary in response to crop development, opens up new-fangled possibilities for reaping the advantages of beneficial root-microbial interactions (Richardson et al, 2021). Metagenomics has a large potential to equip with vital information on plant-microbe interactions, which is required for new technologies to boost agricultural output in the long run (Bramhachari et al, 2017).…”

Section: The Plant-soil Feedback: Essential Tools In Microbiome Manag...mentioning

confidence: 99%

“…Improved ability to predict functionality from dynamic aberrations in root microbial composition is critical for building "designer" microbiome interventions and enhancing agricultural production and sustainability. This will necessitate a more comprehensive genomic and functional classification of plant-linked microbes, their genetic factor, and plant-microbe interactions for their exact useful roles (Richardson et al, 2021).…”

Section: Introductionmentioning

confidence: 99%

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Rhizospheric microorganisms: The gateway to a sustainable plant health

Dlamini

Akanmu

Babalola

2022

Front. Sustain. Food Syst.

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Plant health is essential for food security, and constitutes a major predictor to safe and sustainable food systems. Over 40% of the global crops' productions are lost to pests, insects, diseases, and weeds, while the routinely used chemical-based pesticides to manage the menace also have detrimental effects on the microbial communities and ecosystem functioning. The rhizosphere serves as the microbial seed bank where microorganisms transform organic and inorganic substances in the rhizosphere into accessible plant nutrients as plants harbor diverse microorganisms such as fungi, bacteria, nematodes, viruses, and protists among others. Although, the pathogenic microbes initiate diseases by infiltrating the protective microbial barrier and plants' natural defense systems in the rhizosphere. Whereas, the process is often circumvented by the beneficial microorganisms which antagonize the pathogens to instill disease resistance. The management of plant health through approaches focused on disease prevention is instrumental to attaining sustainable food security, and safety. Therefore, an in-depth understanding of the evolving and succession of root microbiomes in response to crop development as discussed in this review opens up new-fangled possibilities for reaping the profit of beneficial root–microbiomes' interactions toward attaining sustainable plant health.

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“…Root exudates and other rhizodeposits are major determinants of the microbiome community structure because they provide a rich source of organic carbon. Nevertheless, the environment around roots suits some microorganisms better than others so while the total microbial biomass near roots is usually greater than the bulk soil, the composition of the communities can be different and less diverse compared with the bulk soil (Dennis et al 2008;Bakker et al 2013;Reinhold-Hurek et al 2015;Sasse et al 2018;Richardson et al 2021). The root microbiome can be compartmented into the communities living in the external periphery of roots (ectorhizosphere), those colonising the outer surface of roots and perhaps forming biofilms (rhizoplane), and those organisms spending part of their life cycle within the root tissues (endorhizosphere).…”

Section: Introductionmentioning

confidence: 99%

The microbiomes on the roots of wheat (

et al. 2021

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There is increasing interest in understanding how the microbial communities on roots can be manipulated to improve plant productivity. Root systems are not homogeneous organs but are comprised of different root types of various ages and anatomies that perform different functions. Relatively little is known about how this variation influences the distribution and abundance of microorganisms on roots and in the rhizosphere. Such information is important for understanding how root-microbe interactions might affect root function and prevent diseases. This study tested specific hypotheses related to the spatial variation of bacterial and fungal communities on wheat (Triticum aestivum L.) and rice (Oryza sativa L.) roots grown in contrasting soils. We demonstrate that microbial communities differed significantly between soil type, between host species, between root types, and with position along the root axes. The magnitude of variation between different root types and along individual roots was comparable with the variation detected between different plant species. We discuss the general patterns that emerged in this variation and identify bacterial and fungal taxa that were consistently more abundant on specific regions of the root system. We argue that these patterns should be measured more routinely so that localised root-microbe interactions can be better linked with root system design, plant health and performance.

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Root Microbiome Structure and Microbial Succession in the Rhizosphere

Cited by 15 publications

References 80 publications

Phosphate‐solubilising microorganisms for improved crop productivity: a critical assessment

Phosphate‐solubilising microorganisms for improved crop productivity: a critical assessment

Rhizospheric microorganisms: The gateway to a sustainable plant health

The microbiomes on the roots of wheat (

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