Use of Plant Growth-Promoting Rhizobacteria in Maize and Sugarcane: Characteristics and Applications

Santos, Rodrigo Martins dos; Diaz, Paola Andrea Escobar; Lobo, Laiana Lana Bentes; Rigobelo, Everlon Cid

doi:10.3389/fsufs.2020.00136

Cited by 122 publications

(84 citation statements)

References 201 publications

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“…However, potassium metabolism was more in the Ventersdorp rhizosphere (Figure 4(A)). Research studies on maize crops have shown that increased potassium metabolism arises from stimulation of root growth or elasticity of root hair by bacteria for plant growth and development (dos Santos et al 2020;Meena et al 2014;Singh et al 2010). The maize plants would have poorly formed roots without sufficient potassium availability, grow slowly, generate have lower crop yields and increase susceptibility to disease and pests (Meena et al 2014).…”

Section: Effects Of Soil Parameters On the Bacterial Community Structmentioning

confidence: 99%

Metagenomic insights into the bacterial community structure and functional potentials in the rhizosphere soil of maize plants

Molefe

Amoo

Babalola

2021

Journal of Plant Interactions

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Plant rhizosphere zones are hotspots for microbial diversity consisting of different communities when contrasted with surrounding bulk soils. Rhizosphere microorganisms play significant roles in plant development. We investigated the bacterial community and metabolic potentials of maize rhizosphere and bulk soils at two distant geographical locations in the North West Province of South Africa using shotgun metagenomics. We further characterized bacterial genes contributing to plant-beneficial functions present in the soils. Genes involved in plant-beneficial functions like nitrogen fixation and potassium transport were uncovered. Overall, 51 OTUs were identified in the soils. Shared OTUs between soils were 10.9% and 17.2% at Ventersdorp and Mafikeng, respectively. Significant differences in bacterial taxonomic composition and functional categories between soils (P < 0.05) were revealed. Acidobacteria and Firmicutes dominated the rhizosphere soils while Actinobacteria and Gemmatimonadetes were predominant in bulk soils. Proper understanding of soil indigenous microbiome can help ascertain prospective targets for imminent crop breeding and management.

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Section: Effects Of Soil Parameters On the Bacterial Community Structmentioning

confidence: 99%

Metagenomic insights into the bacterial community structure and functional potentials in the rhizosphere soil of maize plants

Molefe

Amoo

Babalola

2021

Journal of Plant Interactions

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“…PGPR also secrete abscisic acid, which stimulates growth activities under stress. It is secreted by many PGPR such as Azospirillum brasilense, Bacillus subtilis, Bacillus licheniformis, and Pseudomonas putida (Cohen et al, 2008;Dos Santos et al, 2020;Kousar et al, 2020). Ethylene is a gaseous hormone which controls fruit ripening (Masood et al, 2012;Nazar et al, 2014).…”

Section: Stenotrophomonas Maltophilia Sbp-9mentioning

confidence: 99%

Climate Change and Salinity Effects on Crops and Chemical Communication Between Plants and Plant Growth-Promoting Microorganisms Under Stress

Ullah

Bano

Khan

2021

Front. Sustain. Food Syst.

147

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During the last two decades the world has experienced an abrupt change in climate. Both natural and artificial factors are climate change drivers, although the effect of natural factors are lesser than the anthropogenic drivers. These factors have changed the pattern of precipitation resulting in a rise in sea levels, changes in evapotranspiration, occurrence of flood overwintering of pathogens, increased resistance of pests and parasites, and reduced productivity of plants. Although excess CO2 promotes growth of C3 plants, high temperatures reduce the yield of important agricultural crops due to high evapotranspiration. These two factors have an impact on soil salinization and agriculture production, leading to the issue of water and food security. Farmers have adopted different strategies to cope with agriculture production in saline and saline sodic soil. Recently the inoculation of halotolerant plant growth promoting rhizobacteria (PGPR) in saline fields is an environmentally friendly and sustainable approach to overcome salinity and promote crop growth and yield in saline and saline sodic soil. These halotolerant bacteria synthesize certain metabolites which help crops in adopting a saline condition and promote their growth without any negative effects. There is a complex interkingdom signaling between host and microbes for mutual interaction, which is also influenced by environmental factors. For mutual survival, nature induces a strong positive relationship between host and microbes in the rhizosphere. Commercialization of such PGPR in the form of biofertilizers, biostimulants, and biopower are needed to build climate resilience in agriculture. The production of phytohormones, particularly auxins, have been demonstrated by PGPR, even the pathogenic bacteria and fungi which also modulate the endogenous level of auxins in plants, subsequently enhancing plant resistance to various stresses. The present review focuses on plant-microbe communication and elaborates on their role in plant tolerance under changing climatic conditions.

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“…The role of PGPR in solubilizing and oxidizing other essential plant nutrients, such as potassium, sulfur, and micronutrients, and their effects on plant growth-promotion are far less studied compared to N, P, and Fe. For more information regarding the role of PGPR in providing these elements to plants, the reader can consult recent publications on this topic [110,111].…”

Section: Enhanced Nutrient Acquisition (Biofertilizer)mentioning

confidence: 99%

Overview of Approaches to Improve Rhizoremediation of Petroleum Hydrocarbon-Contaminated Soils

Alotaibi

Hijri

St‐Arnaud

2021

Applied Microbiology

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Soil contamination with petroleum hydrocarbons (PHCs) has become a global concern and has resulted from the intensification of industrial activities. This has created a serious environmental issue; therefore, there is a need to find solutions, including application of efficient remediation technologies or improvement of current techniques. Rhizoremediation is a green technology that has received global attention as a cost-effective and possibly efficient remediation technique for PHC-polluted soil. Rhizoremediation refers to the use of plants and their associated microbiota to clean up contaminated soils, where plant roots stimulate soil microbes to mineralize organic contaminants to H2O and CO2. However, this multipartite interaction is complicated because many biotic and abiotic factors can influence microbial processes in the soil, making the efficiency of rhizoremediation unpredictable. This review reports the current knowledge of rhizoremediation approaches that can accelerate the remediation of PHC-contaminated soil. Recent approaches discussed in this review include (1) selecting plants with desired characteristics suitable for rhizoremediation; (2) exploiting and manipulating the plant microbiome by using inoculants containing plant growth-promoting rhizobacteria (PGPR) or hydrocarbon-degrading microbes, or a combination of both types of organisms; (3) enhancing the understanding of how the host–plant assembles a beneficial microbiome, and how it functions, under pollutant stress. A better understanding of plant–microbiome interactions could lead to successful use of rhizoremediation for PHC-contaminated soil in the future.

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Use of Plant Growth-Promoting Rhizobacteria in Maize and Sugarcane: Characteristics and Applications

Cited by 122 publications

References 201 publications

Metagenomic insights into the bacterial community structure and functional potentials in the rhizosphere soil of maize plants

Metagenomic insights into the bacterial community structure and functional potentials in the rhizosphere soil of maize plants

Climate Change and Salinity Effects on Crops and Chemical Communication Between Plants and Plant Growth-Promoting Microorganisms Under Stress

Overview of Approaches to Improve Rhizoremediation of Petroleum Hydrocarbon-Contaminated Soils

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