Impact of Soil Microbial Amendments on Tomato Rhizosphere Microbiome and Plant Growth in Field Soil

2020 ◽  
Vol 80 (2) ◽  
pp. 398-409 ◽  
Author(s):  
Andrea Nuzzo ◽  
Aditi Satpute ◽  
Ute Albrecht ◽  
Sarah L Strauss
Keyword(s):  
Plant Growth ◽  
Field Soil ◽  
Soil Microbial ◽  
Rhizosphere Microbiome

scholarly journals Rhizosphere Microbial Community Composition Affects Cadmium and Zinc Uptake by the Metal-Hyperaccumulating Plant Arabidopsis halleri

2015 ◽  
Vol 81 (6) ◽  
pp. 2173-2181 ◽  
Author(s):  
E. Marie Muehe ◽  
Pascal Weigold ◽  
Irini J. Adaktylou ◽  
Britta Planer-Friedrich ◽  
Ute Kraemer ◽  
...  
Keyword(s):  
Microbial Community ◽  
Plant Growth ◽  
Community Composition ◽  
Microbial Community Composition ◽  
Soil Microbial Communities ◽  
Arabidopsis Halleri ◽  
Content Type ◽  
Soil Microbial ◽  
Rhizosphere Microbiome ◽  
Gamma Irradiated

ABSTRACTThe remediation of metal-contaminated soils by phytoextraction depends on plant growth and plant metal accessibility. Soil microorganisms can affect the accumulation of metals by plants either by directly or indirectly stimulating plant growth and activity or by (im)mobilizing and/or complexing metals. Understanding the intricate interplay of metal-accumulating plants with their rhizosphere microbiome is an important step toward the application and optimization of phytoremediation. We compared the effects of a “native” and a strongly disturbed (gamma-irradiated) soil microbial communities on cadmium and zinc accumulation by the plantArabidopsis halleriin soil microcosm experiments.A. halleriaccumulated 100% more cadmium and 15% more zinc when grown on the untreated than on the gamma-irradiated soil. Gamma irradiation affected neither plant growth nor the 1 M HCl-extractable metal content of the soil. However, it strongly altered the soil microbial community composition and overall cell numbers. Pyrosequencing of 16S rRNA gene amplicons of DNA extracted from rhizosphere samples ofA. halleriidentified microbial taxa (Lysobacter,Streptomyces,Agromyces,Nitrospira, “CandidatusChloracidobacterium”) of higher relative sequence abundance in the rhizospheres ofA. halleriplants grown on untreated than on gamma-irradiated soil, leading to hypotheses on their potential effect on plant metal uptake. However, further experimental evidence is required, and wherefore we discuss different mechanisms of interaction ofA. halleriwith its rhizosphere microbiome that might have directly or indirectly affected plant metal accumulation. Deciphering the complex interactions betweenA. halleriand individual microbial taxa will help to further develop soil metal phytoextraction as an efficient and sustainable remediation strategy.

scholarly journals The role of abiotic factors modulating the plant-microbe-soil interactions: toward sustainable agriculture. A review

2017 ◽  
Vol 15 (1) ◽  
pp. e03R01 ◽  
Author(s):  
Gustavo Santoyo ◽  
Claudia Hernández-Pacheco ◽  
Julie Hernández-Salmerón ◽  
Rocio Hernández-León
Keyword(s):  
Plant Growth ◽  
Abiotic Factors ◽  
Plant Growth Promoting Rhizobacteria ◽  
Climatic Conditions ◽  
Co2 Production ◽  
Soil Microbial Diversity ◽  
Soil Microbial ◽  
Rhizosphere Microbiome ◽  
Plant Growth Promoting ◽  
The Impact

Microbial soil communities are active players in the biogeochemical cycles, impacting soil fertility and interacting with aboveground organisms. Although soil microbial diversity has been studied in good detail, the factors that modulate its structure are still relatively unclear, especially the environmental factors. Several abiotic elements may play a key role in modulating the diversity of soil microbes, including those inhabiting the rhizosphere (known as the rhizosphere microbiome). This review summarizes relevant and recent studies that have investigated the abiotic factors at different scales, such as pH, temperature, soil type, and geographic and climatic conditions, that modulate the bulk soil and rhizosphere microbiome, as well as their indirect effects on plant health and development. The plant–microbiome interactions and potential benefits of plant growth-promoting rhizobacteria are also discussed. In the last part of this review, we highlight the impact of climate change on soil microorganisms via global temperature changes and increases in ultraviolet radiation and CO2 production. Finally, we propose the need to understand the function of soil and rhizospheric ecosystems in greater detail, in order to effectively manipulate or engineer the rhizosphere microbiome to improve plant growth in agricultural production.

Growth of Container-grown Plants With and Without Azomite Soil Amendment

HortScience ◽  
1998 ◽  
Vol 33 (3) ◽  
pp. 492c-492
Author(s):  
Chris Ely ◽  
Mark A. Hubbard
Keyword(s):  
Plant Growth ◽  
Physical Properties ◽  
Bulk Density ◽  
Soil Amendment ◽  
Extended Period ◽  
Mineral Elements ◽  
Field Soil ◽  
Rooted Cuttings ◽  
Sodium Calcium ◽  
Water Holding

Azomite is a mined, commercially available, hydrated sodium calcium aluminosiliclate soil amendment reported to act as a source of mineral elements. To determine its effect on plant growth, Dendranthema `Connie' rooted cuttings, Malus seedlings, and Citrus seedlings were grown in containers in one of two growing media: ProMix BX or ProMix BX with Azomite (1:1, v:v). Plant height was monitored weekly and after 6 weeks of growth, fresh and dry plant weights of roots and shoots were determined. There was no difference in any of the parameters measured as a result of the addition of Azomite. Any nutritional influence of the Azomite may only be evident in different conditions, e.g., field soil, or over an extended period of time. The Azomite altered the medium's physical properties and therefore bulk density and water-holding capacity of the Azomite were determined for consideration.

Can repeated soil amendment with biogas digestates increase soil suppressiveness toward non-specific soil-borne pathogens in agricultural lands?

2020 ◽  
pp. 1-12
Author(s):  
L. M. Manici ◽  
F. Caputo ◽  
G. A. Cappelli ◽  
E. Ceotto
Keyword(s):  
Plant Growth ◽  
Biomass Production ◽  
Soil Amendment ◽  
Plant Biomass ◽  
Amended Soils ◽  
Soil Suppressiveness ◽  
Soil Microbial ◽  
Soil Borne Pathogens ◽  
The Impact ◽  
Plant Biomass Production

Abstract Soil suppressiveness which is the natural ability of soil to support optimal plant growth and health is the resultant of multiple soil microbial components; which implies many difficulties when estimating this soil condition. Microbial benefits for plant health from repeated digestate applications were assessed in three experimental sites surrounding anaerobic biogas plants in an intensively cultivated area of northern Italy. A 2-yr trial was performed in 2017 and 2018 by performing an in-pot plant growth assay, using soil samples taken from two fields for each experimental site, of which one had been repeatedly amended with anaerobic biogas digestate and the other had not. These fields were similar in management and crop sequences (maize was the recurrent crop) for the last 10 yr. Plant growth response in the bioassay was expressed as plant biomass production, root colonization frequency by soil-borne fungi were estimated to evaluate the impact of soil-borne pathogens on plant growth, abundance of Pseudomonas and actinomycetes populations in rhizosphere were estimated as beneficial soil microbial indicators. Repeated soil amendment with digestate increased significantly soil capacity to support plant biomass production as compared to unamended control in both the years. Findings supported evidence that this increase was principally attributable to a higher natural ability of digestate-amended soils to reduce root infection by saprophytic soil-borne pathogens whose inoculum was increased by the recurrent maize cultivation. Pseudomonas and actinomycetes were always more abundant in digestate-amended soils suggesting that both these large bacterial groups were involved in the increase of their natural capacity to control soil-borne pathogens (soil suppressiveness).

scholarly journals Successive plant growth amplifies genotype-specific assembly of the tomato rhizosphere microbiome

2021 ◽  
Vol 772 ◽  
pp. 144825
Author(s):  
Viviane Cordovez ◽  
Cristina Rotoni ◽  
Francisco Dini-Andreote ◽  
Ben Oyserman ◽  
Víctor J. Carrión ◽  
...  
Keyword(s):  
Plant Growth ◽  
Rhizosphere Microbiome

scholarly journals New Soil, Old Plants, and Ubiquitous Microbes: Evaluating the Potential of Incipient Basaltic Soil to Support Native Plant Growth and Influence Belowground Soil Microbial Community Composition

2018 ◽  
Author(s):  
Aditi Sengupta ◽  
Priyanka Kushwaha ◽  
Antonia Jim ◽  
Peter A. Troch ◽  
Raina Maier
Keyword(s):  
Microbial Community ◽  
Plant Growth ◽  
Community Composition ◽  
Plant Species ◽  
Soil Microbial Community ◽  
Soil Loss ◽  
Microbial Community Composition ◽  
Parent Material ◽  
Native Plant ◽  
Soil Microbial

The plant-microbe-soil nexus is critical in maintaining biogeochemical balance of the biosphere. However, soil loss and land degradation are occurring at alarmingly high rates, with soil loss exceeding soil formation rates. This necessitates evaluating marginal soils for their capacity to support and sustain plant growth. In a greenhouse study, we evaluated the capacity of marginal incipient basaltic parent material to support native plant growth, and the associated variation in soil microbial community dynamics. Three plant species, native to the Southwestern Arizona-Sonora region were tested with three soil treatments including basaltic parent material, parent material amended with 20% compost, and potting soil. The parent material with and without compost supported germination and growth of all the plant species, though germination was lower than the potting soil. A 16S rRNA amplicon sequencing approach showed Proteobacteria to be the most abundant phyla in both parent material and potting soil, followed by Actinobacteria. Microbial community composition had strong correlations with soil characteristics but not plant attributes within a given soil material. Predictive functional potential capacity of the communities revealed chemoheterotrophy as the most abundant metabolism within the parent material, while photoheterotrophy and anoxygenic photoautotrophy were prevalent in the potting soil. These results show that marginal incipient basaltic soil has the ability to support native plant species growth, and non-linear associations may exist between plant-marginal soil-microbial interactions.

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