Significance of root hairs at the field scale – modelling root water and phosphorus uptake under different field conditions

Ruiz, Siul; Koebernick, Nicolai; Duncan, S. J.; Fletcher, D. Mc Kay; Scotson, Callum; Boghi, Andrea; Marín, María Susana; Bengough, A. Glyn; George, Timothy S.; Brown, Lawrie; Hallett, Paul D.; Roose, Tiina

doi:10.1007/s11104-019-04308-2

Cited by 52 publications

(30 citation statements)

References 71 publications

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“…Plant phosphate use efficiency (PUE) is generally correlated with P acquisition efficiency and with root length and architectural traits (Ruiz et al, 2019). Root hairs can increase the effective surface area of plant roots and help the roots to exploit non-accessible stocks of P through accessing the finer pores than the main root axis can enter, thus length and density of root hairs play important role in nutrient acquisition (Ma et al, 2001).…”

Section: Pgpr In Water and Nutrient Acquisitionmentioning

confidence: 99%

PGPR Mediated Alterations in Root Traits: Way Toward Sustainable Crop Production

Grover

Bodhankar

Sharma

et al. 2021

Front. Sustain. Food Syst.

177

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The above ground growth of the plant is highly dependent on the belowground root system. Rhizosphere is the zone of continuous interplay between plant roots and soil microbial communities. Plants, through root exudates, attract rhizosphere microorganisms to colonize the root surface and internal tissues. Many of these microorganisms known as plant growth promoting rhizobacteria (PGPR) improve plant growth through several direct and indirect mechanisms including biological nitrogen fixation, nutrient solubilization, and disease-control. Many PGPR, by producing phytohormones, volatile organic compounds, and secondary metabolites play important role in influencing the root architecture and growth, resulting in increased surface area for nutrient exchange and other rhizosphere effects. PGPR also improve resource use efficiency of the root system by improving the root system functioning at physiological levels. PGPR mediated root trait alterations can contribute to agroecosystem through improving crop stand, resource use efficiency, stress tolerance, soil structure etc. Thus, PGPR capable of modulating root traits can play important role in agricultural sustainability and root traits can be used as a primary criterion for the selection of potential PGPR strains. Available PGPR studies emphasize root morphological and physiological traits to assess the effect of PGPR. However, these traits can be influenced by various external factors and may give varying results. Therefore, it is important to understand the pathways and genes involved in plant root traits and the microbial signals/metabolites that can intercept and/or intersect these pathways for modulating root traits. The use of advanced tools and technologies can help to decipher the mechanisms involved in PGPR mediated determinants affecting the root traits. Further identification of PGPR based determinants/signaling molecules capable of regulating root trait genes and pathways can open up new avenues in PGPR research. The present review updates recent knowledge on the PGPR influence on root architecture and root functional traits and its benefits to the agro-ecosystem. Efforts have been made to understand the bacterial signals/determinants that can play regulatory role in the expression of root traits and their prospects in sustainable agriculture. The review will be helpful in providing future directions to the researchers working on PGPR and root system functioning.

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Section: Pgpr In Water and Nutrient Acquisitionmentioning

confidence: 99%

PGPR Mediated Alterations in Root Traits: Way Toward Sustainable Crop Production

Grover

Bodhankar

Sharma

et al. 2021

Front. Sustain. Food Syst.

177

View full text Add to dashboard Cite

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“…The obstruction of this mass flow will disrupt the absorption of nutrients which can have a direct effect on root development, from soil to plants. According to [13] the absorption of P nutrients is influenced by the ability of plant roots and plants as a whole, because in some plants the root hair of plants plays an active role in the absorption of P.…”

Section: Soil Phosphorus Availability and P-uptakesmentioning

confidence: 99%

The Impact of Biofertilizers and NPK Fertilizers Application on Soil Phosphorus Availability and Yield of Upland Rice in Tropic Dry Land

2021

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Dry land in Indonesia is dominated by marginal soil which have low macro nutrient content, low organic matter content and low soil microbial activity. Improving soil quality it is necessary to increase nutrients availability such as biofertilizers application. Biofertilizers contains beneficial microbial inoculants to increase soil nutrient availability. The use of biofertilizers combined with NPK fertilizer will increase macro nutrients availability and optimize plant growth, thus will increase fertilizers efficiency. This experiment was carried out to study the impact of biofertilizers on available-P, plant P-uptake and yield of upland rice at Land Research of Agriculture Faculty, Universitas Padjadjaran. This experiment used a randomized block design consisting of ten treatments and three replications The treatments consisted with two doses of biofertilizers (50 kg ha-1 and 75 kg ha-1) and three doses of N,P,K fertilizers (100%, 75%, and 50% from recommended doses). Biofertilizers contains N-fixing bacteria and phosphate solubilizing microbes. The result of experiment showed that application of biofertilizers 75 kg ha-1 and biofertilizers 50 kg ha-1 + N, P, K 50% increased soil phosphorus availability. The application of biofertilizers increased P-uptake up to 81%. Futhermore, biofertilizers 75 kg ha-1 + N, P, K 75% increased the yield of upland rice by 164%.

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“…It has been suggested that a better understanding of agricultural ARZ dynamics can inform plant breeding and land management practices in order to take advantage of naturally occurring processes to reduce N runoff (Bodner et al., 2015; Lynch & Whipps, 1990; Sugiyama et al., 2014). Several models have demonstrated the potential for improved nutrient uptake in agricultural vegetation given improved understanding of root exudation (Ruiz et al., 2020; Wang et al., 2013). At an even larger scale, the role of root contribution to soil nutrient cycling has been recognized as an essential piece of our understanding of subsurface C cycling (Gougherty et al., 2018) and, therefore, global C budgets.…”

Section: Introductionmentioning

confidence: 99%

Modeling the Role of Root Exudation in Critical Zone Nutrient Dynamics

Roque‐Malo

Woo

2020

Water Resources Research

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The multifaceted interface of plant roots, microbes, water, and soil can be considered a critical zone within the Critical Zone as it is host to many important dynamically linked processes, including the promotion of nutrient cycling through absorption and rhizodeposition, interaction and feedbacks with microorganisms and fungi, root‐facilitated hydraulic redistribution, and soil carbon dynamics. Such important processes in the Critical Zone have not been fully characterized and modeled in an ecohydrologic framework linking above‐ground natural and/or anthropogenic processes to below‐ground biogeochemical cycling. Specifically, the relation between root exudates and nutrient cycling remains an open challenge. Here we present the model REWT (Root Exudation in Watershed‐scale Transport) to demonstrate the systematic modeling of root exudation in an interconnected ecohydrologic framework. REWT incorporates an explicit dynamic root exudation transport model, nutrient absorption, and coupled microbial processes within the framework of a validated ecohydrologic model. Model simulations demonstrate the influence of root exudation of glucose, a polysaccharide that serves as fuel for microbes, and flavonoids, which can act as a biological nitrification inhibitor on microbial processes linked to soil carbon and nitrogen cycling. To demonstrate the capabilities of this theoretical framework, we parameterize REWT for corn and soybean crops in the Midwestern United States, and simulations indicate that rates of nitrification and respiration were substantially altered compared to model simulations in which root exudation was not explicitly included. This work demonstrates the importance of systematically incorporating root exudates into hydrobiogeochemical models and can serve to inform experimental design for active root zone processes.

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Significance of root hairs at the field scale – modelling root water and phosphorus uptake under different field conditions

Cited by 52 publications

References 71 publications

PGPR Mediated Alterations in Root Traits: Way Toward Sustainable Crop Production

PGPR Mediated Alterations in Root Traits: Way Toward Sustainable Crop Production

The Impact of Biofertilizers and NPK Fertilizers Application on Soil Phosphorus Availability and Yield of Upland Rice in Tropic Dry Land

Modeling the Role of Root Exudation in Critical Zone Nutrient Dynamics

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