Role of the Potent Microbial Based Bioagents and Their Emerging Strategies for the Ecofriendly Management of Agricultural Phytopathogens

Hussain, Touseef; Akthar, Nadeem; Aminedi, Raghavendra; Danish, Mohd; Nishat, Yasar; Patel, Seema

doi:10.1007/978-981-15-3024-1_4

Cited by 9 publications

(4 citation statements)

References 146 publications

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“…As a result, there is a high demand for alternative and safe techniques to reduce F. verticillioides infection in maize. The use of antagonistic bacteria to control plant pathogenic fungi offers a promising ecologically safe and affordable alternative in comparison to chemical fungicides 8 . Biological control, through the application of plant growth‐promoting bacteria (PGPB), offers a substitute for chemical pesticides for the treatment of numerous fungal diseases.…”

Section: Introductionmentioning

confidence: 99%

Bacterial endophytes inhabiting desert plants provide protection against seed rot caused by Fusarium verticillioides and promote growth in maize

Dinango,

Dhouib,

Wakam

et al. 2023

Pest Management Science

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BACKGROUNDFusarium maize ear and root rot disease caused by Fusarium verticillioides has become one of the most serious fungal diseases associated with maize production. Due to their abilities to promote plant development and manage diseases, bacterial endophytes provide a more promising approach for treating this vascular disease.RESULTSThis work was undertaken for the selection and identification of promising isolates as plant growth promoters and biocontrol agents against F. verticillioides in maize agroecosystems. A screening procedure consisting of in vitro and in situ tests was applied to 27 endophytic strains originating from desert plants: Euphorbia antiquorum, Calotropis procera, and Alcasia albida. In vitro studies indicated that the bacteria exhibited variable results in biocontrol, endophytism, and plant growth‐promoting traits. In addition, in situ plant growth promotion and biocontrol experiments allowed the identification of the most promising bacterial endophytes. In vitro and in situ comparative study results indicated a low correlation. Our data revealed that in situ screening must be used as the method of selection of biocontrol agents against Fusarium ear and root rot disease. Based on in situ results, seven potent strains were selected and identified as Bacillus subtilis, Bacillus velezensis, Bacillus tequilensis, Stenotrophomonas maltophilia, and Klebsiella pneumoniae.CONCLUSIONThe results of this study showed that the selected strains seem to be promising candidates to be exploited as biofertilizers and biocontrol agents against Fusarium maize ear and root rot disease.This article is protected by copyright. All rights reserved.

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Section: Introductionmentioning

confidence: 99%

Bacterial endophytes inhabiting desert plants provide protection against seed rot caused by Fusarium verticillioides and promote growth in maize

Dinango,

Dhouib,

Wakam

et al. 2023

Pest Management Science

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“…Thus, these results suggest that S. albidoflavus is a promising candidate for its application as a heavy metal remediator. Understanding the relationship between microbial metabolites and their host plants is crucial for developing effective biological agents [88,89]. Streptomyces albidoflavus MGMM6 uses multiple metabolite pathways, such as siderophore secretion, nitrogen fixation, and phytohormones, to establish itself in the rhizosphere, compete with other microorganisms in the soil, and protect the plant from pathogens.…”

Section: Discussionmentioning

confidence: 99%

Genomic Insights into the Microbial Agent Streptomyces albidoflavus MGMM6 for Various Biotechnology Applications

Diabankana,

Frolov,

Keremli

et al. 2023

Microorganisms

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Microbial biotechnology plays a crucial role in improving industrial processes, particularly in the production of compounds with diverse applications. In this study, we used bioinformatic approaches to analyze the genomic architecture of Streptomyces albidoflavus MGMM6 and identify genes involved in various metabolic pathways that have significant biotechnological potential. Genome mining revealed that MGMM6 consists of a linear chromosome of 6,932,303 bp, with a high G+C content of 73.5%, lacking any plasmid contigs. Among the annotated genes, several are predicted to encode enzymes such as dye peroxidase, aromatic ring-opening dioxygenase, multicopper oxidase, cytochrome P450 monooxygenase, and aromatic ring hydroxylating dioxygenases which are responsible for the biodegradation of numerous endogenous and xenobiotic pollutants. In addition, we identified genes associated with heavy metal resistance, such as arsenic, cadmium, mercury, chromium, tellurium, antimony, and bismuth, suggesting the potential of MGMM6 for environmental remediation purposes. The analysis of secondary metabolites revealed the presence of multiple biosynthesis gene clusters responsible for producing compounds with potent antimicrobial and metal-chelating activities. Furthermore, laboratory tests conducted under controlled conditions demonstrated the effectiveness of MGMM6 in inhibiting phytopathogenic microbes, decolorizing and degrading aromatic triphenylmethane dyes, particularly Blue Brilliant G250, from wastewater by up to 98 ± 0.15%. Overall, the results of our study highlight the promising biotechnological potential of S. albidoflavus MGMM6.

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“…Fosamine, another phosphonate herbicide, is primarily used to target woody plants, and around 1.6 thousand pounds of fosamine was applied to grow vegetables and fruits in the Washington State of the U.S. during 2016 . The intensive use of phosphonate herbicides is of significant environmental concern due to their persistence in the environment, transportation through soil and water bodies, and toxicity to nontarget environmental organisms, including soil microorganisms. − In recent years, plant growth-promoting rhizobacteria (PGPR) have been increasingly applied as biofertilizers to enhance plant nutrient uptake or to act as plant disease control agents. − Here, we sought to investigate the impact of phosphonate herbicides on two PGPRPseudomonas protegens (formerly known as P. fluorescens; a Gram-negative species) and Priestia megaterium (formerly known as Bacillus megaterium; a Gram-positive species).…”

Section: Introductionmentioning

confidence: 99%

“… 6 − 9 In recent years, plant growth-promoting rhizobacteria (PGPR) have been increasingly applied as biofertilizers to enhance plant nutrient uptake or to act as plant disease control agents. 10 − 14 Here, we sought to investigate the impact of phosphonate herbicides on two PGPR— Pseudomonas protegens 15 (formerly known as P. fluorescens ; a Gram-negative species) and Priestia megaterium ( 16 ) (formerly known as Bacillus megaterium ; a Gram-positive species).…”

Section: Introductionmentioning

confidence: 99%

Effects of Phosphonate Herbicides on the Secretions of Plant-Beneficial Compounds by Two Plant Growth-Promoting Soil Bacteria: A Metabolomics Investigation

Wilkes

Aristilde

2021

ACS Environ. Au

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Plant growth-promoting rhizobacteria (PGPR) that colonize plant roots produce a variety of plant-beneficial compounds, including plant-growth regulators, metal-scavenging compounds, and antibiotics against plant pathogens. Adverse effects of phosphonate herbicides, the most extensively used herbicides, on the growth and metabolism of PGPR species have been widely reported. However, the potential consequence of these effects on the biosynthesis and secretion of PGPR-derived beneficial compounds still remains to be investigated. Here, using high-resolution mass spectrometry and a metabolomics approach, we investigated both the intracellular metabolome and the extracellular secretions of biomass-normalized metabolite levels in two PGPR species (Pseudomonas protegens Pf-5, a Gram-negative bacterium; Priestia megaterium QM B1551, a Grampositive bacterium) exposed to three common phosphonate herbicides (glyphosate, glufosinate, and fosamine; 0.1−1 mM) in either iron (Fe)-replete or Fe-deficient nutrient media. We quantified secreted auxin-type plant hormone compounds (phenylacetic acid and indole-3-acetic acid), iron-scavenging compounds or siderophores (pyoverdine and schizokinen), and antibiotics (2,4diacetylphloroglucinol and pyoluteorin) produced by these PGPR species. The Fe-replete cells exposed to the phosphonate herbicides yielded up to a 25-fold increase in the production of both auxin and antibiotic compounds, indicating that herbicide exposure under Fe-replete conditions triggered metabolite secretions. However, the herbicide-exposed Fe-deficient cells exhibited a near 2-fold depletion in the secretion of these auxin and antibiotic compounds as well as a 77% decrease in siderophore production. Intracellular metabolomics analysis of the Fe-deficient cells further revealed metabolic perturbations in biosynthetic pathways consistent with the impaired production of the plant-beneficial compounds. Our findings implied that compromised cellular metabolism during nutrient deficiency may exacerbate the adverse effects of phosphonate herbicides on PGPR species.

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Role of the Potent Microbial Based Bioagents and Their Emerging Strategies for the Ecofriendly Management of Agricultural Phytopathogens

Cited by 9 publications

References 146 publications

Bacterial endophytes inhabiting desert plants provide protection against seed rot caused by Fusarium verticillioides and promote growth in maize

Bacterial endophytes inhabiting desert plants provide protection against seed rot caused by Fusarium verticillioides and promote growth in maize

Genomic Insights into the Microbial Agent Streptomyces albidoflavus MGMM6 for Various Biotechnology Applications

Effects of Phosphonate Herbicides on the Secretions of Plant-Beneficial Compounds by Two Plant Growth-Promoting Soil Bacteria: A Metabolomics Investigation

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