Shaping an Optimal Soil by Root–Soil Interaction

Jin, Kemo; White, Philip J.; Whalley, W. R.; Shen, Jianbo; Shi, Lei

doi:10.1016/j.tplants.2017.07.008

Cited by 90 publications

(54 citation statements)

References 70 publications

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“…An important feature of plant-soil interactions are plant influences on the rhizosphere and rhizosheath formation (Brown et al 2017; Jin et al 2017) although little is known about the role for any adhesive molecules at root surfaces. Methods are required to dissect the interface between plants and the soil environment and the roles of any secreted polysaccharides.…”

Section: Introductionmentioning

confidence: 99%

A quantitative method for the high throughput screening for the soil adhesion properties of plant and microbial polysaccharides and exudates

et al. 2018

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Background and aimsUnderstanding the structures and functions of carbon-based molecules in soils is an important goal in the context of soils as an ecosystem function of immense importance. Polysaccharides are implicated in maintaining soil aggregate status but have not been extensively dissected in terms of their structures and soil adhesion properties. This is largely because of the technical difficulties in identifying polysaccharide structures and quantifying any functional properties.MethodsHere, we describe the use of a novel nitrocellulose-based adhesion assay to determine the relative capacities for soil adhesion of over twenty plant and microbial polysaccharides that are likely to be present in soil and to contribute to organic matter content and properties. Weights of soil adhered to spots of known amounts of specific polysaccharides were quantified by scanning of the nitrocellulose sheets.ResultsThe most effective polysaccharides identified from this survey included chitosan, β-1,3-glucan, gum tragacanth, xanthan and xyloglucan. We also demonstrate that the soil adhesion assay is suitable to assess the soil-binding properties of plant exudates.ConclusionsThe soil adhesion assay will be useful for the functional dissection of the organic matter components of soils and also of the factors involved in soil attachment to plant roots and in rhizosheath formation.

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Section: Introductionmentioning

confidence: 99%

A quantitative method for the high throughput screening for the soil adhesion properties of plant and microbial polysaccharides and exudates

et al. 2018

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“…Moreover, the quantity of resource inputs is related to root morphology (the more lateral the roots the higher the exudation; Prikryl and Vancura (1980)) and plants could also affect microbial communities in soil via their influence on habitat properties (Eisenhauer et al, 2010;Veresoglou, Sen, Mamolos, & Veresoglou, 2011). For instance, a plant with a branched or a deep root system is likely to increase oxygen (O 2 ) concentration in soil through its effect on soil penetration and aeration (Jin, White, Whalley, Shen, & Shi, 2017).…”

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confidence: 99%

The effects of plant type, AMF inoculation and water regime on rhizosphere microbial communities

Monokrousos

Papatheodorou

Orfanoudakis

et al. 2019

European J Soil Science

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Different plant species, water regimes and microbes in the rhizosphere might shape rhizosphere microbial communities due to their effects on root exudation patterns and interactions. In this study, we investigated whether rhizosphere microbial communities have distinct structures according to plant type (Festuca pratensis, Dactylis glomerata or a mixture of both species), water regime (dry and wet pots) and inoculation with the arbuscular mycorrhizal fungus Rhizophagus irregularis (AMF). Following a 60‐day pot experiment we assessed the rhizosphere microbial population structure via phospholipid fatty acids (PLFAs) and soil processes via the activity of N‐acetyl‐glucosaminidase (NAG), acid phosphatase and urease, and inorganic nitrogen (N) and phosphorus (P). Higher AMF colonization was recorded in F. pratensis, although its root and shoot biomass was lower than in D. glomerata. Although growth differed between the plant types, this exerted no influence on rhizosphere microbial biomass. Low water content decreased the biomass of all microbial groups, whereas inoculation with AMF decreased the biomass of fungi and increased that of bacteria. For enzyme activities only urease showed a response to treatments. Arbuscular mycorrhizal fungi inoculation increased available P and shifted mineral N content from nitrate to ammonium. The water regime had a dominant effect on the structure of the microbial communities, suggesting a direct effect of water on microbes. In wet soils, the structure of the microbial communities was modulated mainly by inoculation; AMF‐inoculated D. glomerata soils showed distinct communities. In dry soils, plant type exerted a profound effect on rhizosphere communities; the communities of all three plant types differed, probably due to limitations in the diffusion of nutrients or via reduced root exudation. We concluded that the relative importance of factors shaping rhizosphere microbial communities varies depending on soil moisture regime. Highlights Microbial communities were studied in relation to water regime, plant species and AMF inoculation In wet soils, the microbial communities of AMF‐inoculated D. glomerata plants differed from other communities In dry soils, the microbial communities of D. glomerata and mixtures differed AMF increased bacterial biomass and soil P but decreased nitrate:ammonium ratio

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“…Currently, more combined methodology has been developed to solve the issue (Apse, Aharon, Snedden, & Blumwald, 1999;Kemo et al, 2017;Liesje et al, 2016;Lu et al, 2018a,b;Meier et al, 2017;Miao, Yang, Chen, & Gao, 2012;Munns & Gilliham, 2015;Park, Kim, & Yun, 2016;Shao, 2014Shao, , 2017. We have outlined the framework to improve and develop coastal salt-affected soil for reference, which will be the main tendency in the field (Figure 2).…”

Section: Perspectivesmentioning

confidence: 99%

“…For example, planting Jerusalem artichoke reduced the salt content of soils characterized by high and moderate salinity and also declined the soil pH to a more neutral value and improved saline-alkali soil by enriching bacterial communities, enhancing phosphatase and invertase activities, decreasing soil salinity, optimizing soil structure, and transforming the soil to loam suitable for cultivation (Long, Liu, Shao, Shao, & Liu, 2016;Wang, Tang, & Shao, 2015). Partial halophytes are crop plants including industrial crop plants and medicinal plants Jesus, Danko, Fiúza, & Borges, 2015;Kemo, Philip, William, Shen, & Shi, 2017;Liesje, John, & Jasper, 2016;Meier, Finzi, & Phillips, 2017;Mishra & Tanna, 2017;Nicole & Harro, 2016;Nikalje et al, 2018;Qi et al, 2018). Salt-tolerant mechanisms by halophytes include accumulating inorganic ions and organic solutes for osmotic regulation, keeping ion in balance by reducing Na + intake, and increasing Na + efflux as well as cellular or tissue compartmentalization, detoxification of reactive oxygen species (ROS) by antioxidant systems (Tom, Guiomar, & Paula, 2018).…”

Section: Introductionmentioning

confidence: 99%

Towards sustainable agriculture for the salt‐affected soil

Shao

Chu

et al. 2018

Land Degrad Dev

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Salt stress is a major problem happening in almost all the world, affecting soil metabolism and acting further negatively soil fertility and soil quality, causing land degradation and low ecosystem service functions and ecosystem productivity. In marshy area as one type of important marginal land resources, salt is also the main barrier to be improved and the driving force to make vegetation succeed. This commentary briefly reviews the main advance focusing on salt‐affected soil and introduced the publications in this Special Issue: Salt Soil Improvement and Efficient Development in Land Degradation & Development 29, 2018, to promote global cooperation for studying salt‐affecting soil quality, land degradation, and eco‐restoration.

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Shaping an Optimal Soil by Root–Soil Interaction

Cited by 90 publications

References 70 publications

A quantitative method for the high throughput screening for the soil adhesion properties of plant and microbial polysaccharides and exudates

A quantitative method for the high throughput screening for the soil adhesion properties of plant and microbial polysaccharides and exudates

The effects of plant type, AMF inoculation and water regime on rhizosphere microbial communities

Towards sustainable agriculture for the salt‐affected soil

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