Actinomycetes: Implications and Prospects in Sustainable Agriculture

Shanthi, V.

doi:10.1002/9781119724995.ch11

Cited by 14 publications

(18 citation statements)

References 136 publications

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“…ORS 1437, Microbacterium FS-01, Mycobacteria, and Propionibacteria can also fix nitrogen [14,18]. With the advancement of molecular studies, several nifH-containing Actinobacteria (other than Frankia sp) as well as non-Frankia Actinomycetes like Gordonibacter pamelaecae, Rothia mucilaginosa, and Slackia exigua have been discovered leaving behind questions about diazotrophic origin and emergence among Actinobacteria [1,15]. Apart from this, Actinobacteria also forms symbiotic association with mycorrhiza by promoting hyphal elongation of symbiotic fungi.…”

Section: Nitrogen Fixationmentioning

confidence: 99%

“…Provides nitrogen source as well as protects the leguminous plants like pea from pathogens. [1,15] Frankia Fixes nitrogen either under free-living conditions or symbiotically via actinonodules in higher non-leguminous plants like Alnus, Casuarina, and Hippophae.…”

Section: Pseudonocardia Dioxanivorans Cb1190mentioning

confidence: 99%

“…Two known mechanisms used by them are as follows:i) they secrete extracellular enzyme phytases which degrade phytate and ii) they create acidic environment near the rhizosphere by releasing various acids such as citric, gluconic, malic, oxalic, propionic, and succinic acids which solubilize the insoluble forms. Characteristic examples include Arthrobacter, Gordonia, Kitasatospora, Kocuria kristinae IARI-HHS2-64, Micrococcus, Micromonospora sp., Micromonospora aurantiaca, Micromonospora endolithica, Rhodococcus, Streptomyces sp., Streptomyces griseus, and Thermobifida [14,15,18,20].…”

Section: Micromonosporamentioning

confidence: 99%

“…Today Streptomyces alone contribute to two-third of the world's antibiotic production due to its extra-large DNA complement [2]. Antibiosis is enabled by the production of several groups of antibiotics ranging from aminoglycosides (streptomycin and kanamycin), ansamycins (rifampin), anthracyclines (doxorubicin), β-lactams (cephalosporins), macrolides (erythromycin and oleandomycin), and polyene (nystatin and levorin) to tetracycline [2,15]. Some of them have been listed in Table 4.…”

Section: Production Of Antibioticsmentioning

confidence: 99%

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Application of Actinobacteria in Agriculture, Nanotechnology, and Bioremediation

Jain¹,

Gupta²,

Walia³

et al. 2022

Actinobacteria - Diversity, Applications and Medical Aspects

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“Actinobacteria” are of significant economic value to mankind since agriculture and forestry depend on their soil system contribution. The organic stuff of deceased creatures is broken down into soil, and plants are able to take the molecule up again. Actinobacteria can be used for sustainable agriculture as biofertilizers for the improvement of plant growth or soil health by promoting different plant growth attributes, such as phosphorus and potassium solubilization, production of iron-chelating compounds, phytohormones, and biological nitrogen attachment even under the circumstances of natural and abiotic stress. Nanotechnology has received considerable interest in recent years due to its predicted impacts on several key fields such as health, energy, electronics, and the space industries. Actinobacterial biosynthesis of nanoparticles is a dependable, environmentally benign, and significant element toward green chemistry, which links together microbial biotechnology and nanobiology. Actinobacterial-produced antibiotics are common in nearly all of the medical treatments, and they are also recognized to aid in the biosynthesis of excellent surface and size properties of nanoparticles. Bioremediation using microorganisms is relatively safe and more efficient. Actinobacteria use carbon toxins to synthesize economically viable antibiotics, enzymes, and proteins as well. These bacteria are the leading microbial phyla that are beneficial for deterioration and transformation of organic and metal substrates.

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Section: Nitrogen Fixationmentioning

confidence: 99%

Section: Pseudonocardia Dioxanivorans Cb1190mentioning

confidence: 99%

Section: Micromonosporamentioning

confidence: 99%

Section: Production Of Antibioticsmentioning

confidence: 99%

See 2 more Smart Citations

Application of Actinobacteria in Agriculture, Nanotechnology, and Bioremediation

Jain¹,

Gupta²,

Walia³

et al. 2022

Actinobacteria - Diversity, Applications and Medical Aspects

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show abstract

“…( Gomes et al 2000 ; Kumar et al 2019 ; Pagmadulam et al 2020 ; Song et al 2020 ). Their ability to decompose plant biomass by producing various lignocellulolytic enzymes and chelate soil minerals makes their contribution to improving agricultural productivity and mineral recycling in soil compelling ( Saini et al 2015 ; Javed et al 2021 ; Shanthi 2021 ). Further, actinobacterial endophytic associations are found to be beneficial to their plant counterparts, as actinobacteria can produce plant growth regulators, solubilize minerals, and fix nitrogen ( Franco-Correa and Chavarro-Anzola 2016 ; Bhatti et al 2017 ; Yadav et al 2018; AbdElgawad et al 2020 ).…”

Section: Introductionmentioning

confidence: 99%

Characterization of Bioactive Actinomycetes Isolated from Kadolkele Mangrove Sediments, Sri Lanka

Naligama

Weerasinghe

Halmillawewa

2022

Polish Journal of Microbiology

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Exploring untapped microbial potentials in previously uncharted environments has become crucial in discovering novel secondary metabolites and enzymes for biotechnological applications. Among prokaryotes, actinomycetes are well recognized for producing a vast range of secondary metabolites and extracellular enzymes. In the present study, we have used surface sediments from ‘Kadolkele’ mangrove ecosystem located in the Negombo lagoon area, Sri Lanka, to isolate actinomycetes with bioactive potentials. A total of six actinomycetes were isolated on modified-starch casein agar and characterized. The isolates were evaluated for their antibacterial activity against four selected bacterial strains and to produce extracellular enzymes: cellulase, amylase, protease, and lipase. Three out of the six isolates exhibited antibacterial activity against Staphylococcus aureus, Escherichia coli, and Bacillus cereus, but not against Listeria monocytogenes. Five strains could produce extracellular cellulase, while all six isolates exhibited amylase activity. Only three of the six isolates were positive for protease and lipase assays separately. Ac-1, Ac-2, and Ac-9, identified as Streptomyces spp. with the 16S rRNA gene sequencing, were used for pigment extraction using four different solvents. Acetone-extracted crude pigments of Ac-1 and Ac-2 were further used in well-diffusion assays, and growth inhibition of test bacteria was observed only with the crude pigment extract of Ac-2. Further, six different commercially available fabrics were dyed with crude pigments of Ac-1. The dyed fabrics retained the yellow color after acid, alkaline, and cold-water treatments suggesting the potential of the Ac-1 pigment to be used in biotechnological applications.

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Screening biosurfactant‐producing actinomycetes: Identification of Streptomyces sp. RP1 as a potent species for bioremediation

Ayoib,

Gopinath,

Zambry

et al. 2024

J Basic Microbiol

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This study aimed to isolate biosurfactant‐producing and hydrocarbon‐degrading actinomycetes from different soils using glycerol–asparagine and starch–casein media with an antifungal agent. The glycerol–asparagine agar exhibited the highest number of actinomycetes, with a white, low‐opacity medium supporting pigment production and high growth. Biosurfactant analyses, such as drop collapse, oil displacement, emulsification, tributyrin agar test, and surface tension measurement, were conducted. Out of 25 positive isolates, seven could utilize both olive oil and black oil for biosurfactant production, and only isolate RP1 could produce biosurfactant when grown in constrained conditions with black oil as the sole carbon source and inducer, demonstrating in situ bioremediation potential. Isolate RP1 from oil‐spilled garden soil is Gram‐staining‐positive with a distinct earthy odor, melanin formation, and white filamentous colonies. It has a molecular size of ~621 bp and 100% sequence similarity to many Streptomyces spp. Morphological, biochemical, and 16 S rRNA analysis confirmed it as Streptomyces sp. RP1, showing positive results in all screenings, including high emulsification activity against kerosene (27.2%) and engine oil (95.8%), oil displacement efficiency against crude oil (7.45 cm), and a significant reduction in surface tension (56.7 dynes/cm). Streptomyces sp. RP1 can utilize citrate as a carbon source, tolerate sodium chloride, resist lysozyme, degrade petroleum hydrocarbons, and produce biosurfactant at 37°C in a 15 mL medium culture, indicating great potential for bioremediation and various downstream industrial applications with optimization.

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Actinomycetes: Implications and Prospects in Sustainable Agriculture

Cited by 14 publications

References 136 publications

Application of Actinobacteria in Agriculture, Nanotechnology, and Bioremediation

Application of Actinobacteria in Agriculture, Nanotechnology, and Bioremediation

Characterization of Bioactive Actinomycetes Isolated from Kadolkele Mangrove Sediments, Sri Lanka

Screening biosurfactant‐producing actinomycetes: Identification of Streptomyces sp. RP1 as a potent species for bioremediation

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