The “Biased Rhizosphere” Concept and Advances in the Omics Era to Study Bacterial Competitiveness and Persistence in the Phytosphere

Savka, Michael A.; Dessaux, Yves; Gardener, Brian B. McSpadden; Mondy, Samuel; Kohler, Petra R. A.; Bruijn, Frans J. de; Rossbach, Silvia

doi:10.1002/9781118297674.ch110

Cited by 18 publications

(10 citation statements)

References 80 publications

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“…Taking into account the role of plant root exudates in attracting rhizosphere microorganisms, altering the root exudate composition, both qualitatively and quantitatively, is a major approach to reshape the rhizosphere microbiome. The creation of a Bbiased rhizosphere^is a novel procedure which involves the expression of specific genes in transgenic plants that would enable roots to produce the specific nutritional compound, which can be used or recognized by specific beneficial microorganisms (Reddy et al 2002;Savka et al 2013). The goal of rhizosphere engineering is to direct the plant-microbe interaction towards enhanced beneficial outcomes including nutrient cycling, mineralization and organic matter decomposition, tolerance to drought, salinity and other abiotic stresses, and resistance to diseases (Marasco et al 2012;Quiza et al 2015).…”

Section: Engineering a Biased Rhizosphere To Promote Plant-microbe Inmentioning

confidence: 99%

Rhizosphere microbiome: revisiting the synergy of plant-microbe interactions

2019

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Sustainable enhancement in food production from less available arable land must encompass a balanced use of inorganic, organic, and biofertilizer sources of plant nutrients to augment and maintain soil fertility and productivity. The varied responses of microbial inoculants across fields and crops, however, have formed a major bottleneck that hinders its widespread adoption. This necessitates an intricate analysis of the interrelationships between soil microbial communities and their impact on host plant productivity. The concept of Bbiased rhizosphere,^which evolved from the interactions among different components of the rhizosphere including plant roots and soil microflora, strives to garner a better understanding of the complex rhizospheric intercommunications. Moreover, knowledge on rhizosphere microbiome is essential for developing strategies for shaping the rhizosphere to benefit the plants. With the advent of molecular and Bomics^tools, a better understanding of the plant-microbe association could be acquired which could play a crucial role in drafting the future Bbiofertilizers.^The present review, therefore aims to (a) to introduce the concepts of rhizosphere hotspots and microbiomes and (b) to detail out the methodologies for creating biased rhizospheres for plant-mediated selection of beneficial microorganisms and their roles in improving plant performance.

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Section: Engineering a Biased Rhizosphere To Promote Plant-microbe Inmentioning

confidence: 99%

Rhizosphere microbiome: revisiting the synergy of plant-microbe interactions

2019

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“…The complexity of the soil matrix also adds technological hurdles to studying PGPMs. The soil matrix often hinders nucleic acid extraction and, subsequently, sequence-based analyses of microorganisms, thus inhibiting the exploration of microbial community structure ( Carini et al, 2016 ), genetic signatures pertaining to nutrient processing ( Krsek and Wellington, 1999 ; Martin-Laurent et al, 2001 ), and the identification of microbial guilds to utilize in rhizosphere engineering ( Savka et al, 2013 ; Mueller and Sachs, 2015 ; Pii et al, 2015 ; Dessaux et al, 2016 ). In contrast to soil-based agricultural systems, aquaponic systems operate in highly monitored and controlled environments (e.g., pH, temperature, hydraulic retention time, nutrient concentrations, etc.…”

Section: Aquaponics – Stripping Away the Soilmentioning

confidence: 99%

Stripping Away the Soil: Plant Growth Promoting Microbiology Opportunities in Aquaponics

et al. 2018

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As the processes facilitated by plant growth promoting microorganisms (PGPMs) become better characterized, it is evident that PGPMs may be critical for successful sustainable agricultural practices. Microbes enrich plant growth through various mechanisms, such as enhancing resistance to disease and drought, producing beneficial molecules, and supplying nutrients and trace metals to the plant rhizosphere. Previous studies of PGPMs have focused primarily on soil-based crops. In contrast, aquaponics is a water-based agricultural system, in which production relies upon internal nutrient recycling to co-cultivate plants with fish. This arrangement has management benefits compared to soil-based agriculture, as system components may be designed to directly harness microbial processes that make nutrients bioavailable to plants in downstream components. However, aquaponic systems also present unique management challenges. Microbes may compete with plants for certain micronutrients, such as iron, which makes exogenous supplementation necessary, adding production cost and process complexity, and limiting profitability and system sustainability. Research on PGPMs in aquaponic systems currently lags behind traditional agricultural systems, however, it is clear that certain parallels in nutrient use and plant-microbe interactions are retained from soil-based agricultural systems.

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“…PGPR (Savka et al, 2013). These authors have revised the biased rhizosphere concept and provide pioneering insights on its origin and significance.…”

Section: The "Biased Rhizosphere" Concept/actionmentioning

confidence: 99%

“…The origin of the biased rhizosphere concept derived from an analysis of the interactions between rhizobia and plant (generated Barea by rhizopine-like molecules) and Agrobacterium and plant (generated by opine-like molecules), specific compounds able to foster such interactions. Savka et al (2013) and agro-ecosystem productivity.…”

Section: The "Biased Rhizosphere" Concept/actionmentioning

confidence: 99%

Future challenges and perspectives for applying microbial biotechnology in sustainable agriculture based on a better understanding of plant-microbiome interactions

Barea

2015

J. Soil Sci. Plant Nutr.

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An intensive agricultural production is necessary to satisfy food requirements for the growing world population. However, its realization is associated with the mass consumption of non-renewable natural resources and with the emission of greenhouse gases causing climate changes. The research challenge is to meet sustainable environmental and economical issues without compromising yields. In this context, exploiting the agroecosystem services of soil microbial communities appears as a promising effective approach. This chapter reviews the research efforts aimed at improving a sustainable and healthy agricultural production through the appropriate management of soil microorganisms. First, the plant-associated microbiome is briefly described. Then, the current research technologies for formulation and application of inocula based on specific beneficial plant-associated microbes are summarized. Finally, the perspectives and opportunities to manage naturally existing microbial populations, including those non-culturable, are analyzed. This analysis concerns: (i) a description of the already available, culture-independent, molecular techniques addressed at increasing our understanding of root-microbiome interactions; (ii) how to improve the ability of soil microbes for alleviating the negative impacts of stress factors on crop productivity; and (iii) whether plants can structure their rootassociated microbial communities and, leading on from this, whether the rhizosphere can be engineered (biased) to encourage beneficial organisms, while prevent presence of pathogens.

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The “Biased Rhizosphere” Concept and Advances in the Omics Era to Study Bacterial Competitiveness and Persistence in the Phytosphere

Cited by 18 publications

References 80 publications

Rhizosphere microbiome: revisiting the synergy of plant-microbe interactions

Rhizosphere microbiome: revisiting the synergy of plant-microbe interactions

Stripping Away the Soil: Plant Growth Promoting Microbiology Opportunities in Aquaponics

Future challenges and perspectives for applying microbial biotechnology in sustainable agriculture based on a better understanding of plant-microbiome interactions

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