An update about plant growth promoting Streptomyces species

Al-Tammar, Fatimah K.; Khalifa, Ashraf

doi:10.7324/jabb.2023.130126

Cited by 3 publications

(2 citation statements)

References 51 publications

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“…The illustration below (Figure 5) conceptually summarizes the virtues of Streptomyces spp consortium on good Vicia Faba L plant growth. In another study done by Pang et al [231] , substances discharged from Streptomyces coelicolor, Streptomyces violaceusniger, and Streptomyces violaceusniger strains, including siderophore, chitinase, antifungal nigericin, and antibiotic geldanamycin [234] , regulate stress metabolite and control hyphal development. While Streptomyces has been used successfully for biocontrol, one notable case is with rice plants [235] .…”

Section: Streptomyces In Agricultural Biocontrolmentioning

confidence: 99%

Streptomyces at the Heart of Several Sectors to Support Practical and Sustainable Applications: A Review

Beroigui,

Errachidi

2023

Prog Micobes Mol Biol

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This article emphasizes the various contributions of actinobacteria to the well-being of human life on our planet. Agrarian virtues begin with the substitution of chemical fertilizers with bio-fertilizing microorganisms which have a versatile potential for the benefit of soil and plants by playing complementary and interconnected roles. Thus, these microorganisms improve soil health through bioremediation phenomena and the elimination of several non-beneficial microorganisms. In agriculture, these microorganisms can be added to compost as inoculants to speed up the composting process and provide an additional source of beneficial microorganisms for the compost-treated soil. Streptomyces and other actinobacteria can also be used as biotechnological sources of herbicides and insecticides. In the medical and therapeutic sectors, this paper emphasizes the potential of actinobacteria, in particular Streptomyces species, in the production of antibiotics, antioxidant, and anticancer agents, opening up avenues for the creation of molecules with high benefits. In biotechnology, these totipotent microorganisms produce enzymes widely used in several industries, generating considerable revenue. Sporadic data accumulated on these types of microorganisms opens up many new avenues for exploiting these natural biocatalytic resources. Papers published in the last decade have exploded the amount of information that can be put to practical use. To maximize the value of these microorganisms, it would be advisable to create common threads between the themes that bring together the areas of expertise where these microorganisms could potentially be exploited. This bibliographical synthesis is a contribution to the development of a targeted database.

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Section: Streptomyces In Agricultural Biocontrolmentioning

confidence: 99%

Streptomyces at the Heart of Several Sectors to Support Practical and Sustainable Applications: A Review

Beroigui,

Errachidi

2023

Prog Micobes Mol Biol

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“…A variety of microbial groups grow and interact with roots in the rhizosphere due to the presence of nutrients secreted by plant roots. Root exudates are a group of soluble organic substances synthesized and released by roots, including amino acids, sugars, growth factors, and enzymes [ 1 , 2 , 3 ]. These nutrients shape the abundance and composition of microbes around plant roots.…”

Section: Introductionmentioning

confidence: 99%

Whole-Genome Sequence Insight into the Plant-Growth-Promoting Bacterium Priestia filamentosa Strain AZC66 Obtained from Zygophyllum coccineum Rhizosphere

Khalifa

Alsowayeh

2023

Plants

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This study aimed to isolate, screen the plant-growth-enhancing features, and explore the whole-genome sequence of AZC66 isolated from the rhizosphere of Zygophyllum coccineum and determine its biostimulating effects on the growth of cowpea under greenhouse conditions. Salkowski reagent was used to measure AZC66’s indole acetic acid production. AZC66’s inorganic phosphate solubility on Pikovskaya agar was evaluated using tricalcium phosphate. The results indicated the ability of AZC66 to fix nitrogen, produce IAA (66.33 ± 0.44 μg mL−1), solubilize inorganic phosphate, and exhibit the activity of ACC deaminase (278.40 ± 21 mol -ketobutyrate mg−1 h−1). Cowpea’s root and shoot dry weights were also significantly increased after in vitro inoculation with AZC66. The identity of AZC66 was confirmed as Priestia filamentosa, and 4840 genes were predicted in its genome. The gene sequences were compared against the Kyoto Encyclopedia of Genes and Genomes (KEGG) database, and the results showed that the top three pathways wherein the maximum number of genes are involved are signaling and cellular processes, genetic information processing, and carbohydrate metabolism. The genome sequencing of the strain AZC66 revealed a number of genes implicated in plant biostimulation activities such as nitrogen fixation (nifU), phytohormone synthesis (trpAB genes), phosphate solubilization (PhbCEF, pstABCS, and phoU), and siderophore formation (FbpA, feoAB, and fetB). The AZC66 genome contained numerous genes involved in nitrogen metabolism, nitrogen regulation, and the nitrate reduction pathway. The phenazine biosynthetic gene in AZC66 demonstrated biocontrol and soil survival properties. The trehalose synthesis genes in AZC66 may help plants resist osmotic and salt stress. The discovery of glycine betaine, cold shock, and heat shock protein genes demonstrated that AZC66 could withstand harsh conditions. AZC66 might be used to create robust, sustainable biological fertilizers for future agricultural use in Saudi Arabia. Furthermore, the predicted adaptable metabolic pathways might serve as the basis for potential biotechnological applications in agriculture and industry.

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Antiviral activities of three Streptomyces spp. against Zucchini yellow mosaic virus (ZYMV) infecting squash (Cucurbita pepo L.) plants

Ghanem,

Mahmoud,

Kheder

et al. 2023

Egypt J Biol Pest Control

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Background Zucchini yellow mosaic virus (ZYMV) is the major devastating disease worldwide, which leads to substantial economic losses (up to 100%) to yield and fruits quality produced of squash plants. Application of agro-pesticides is efficient and incompatible with organic agriculture and reportedly has harmful effects on human health and ecosystem. Nowadays, Streptomyces spp., a rich source of potential bioactive secondary metabolites, is extensively used to manage various biotic stresses for sustainable agriculture and considered to be eco-friendly. Results An isolate of ZYMV was isolated from squash plants and identified based on biological and molecular characterization using RT-PCR for several genes, i.e., coat protein gene (CP), DAG, P1 and P3 coding regions in the virus RNA, and then, nucleotide sequences were compared to other isolates submitted in GenBank having accession numbers, i.e., OM925548.1, OM925549.1, OM925550.1 and OM925551.1, respectively. Phylogenetic trees of CP, DAG, P1 and P3 sequences compared to other ZYMV nucleotide sequences presented in the GenBank. In order to determine new efficient substances elicitors derived from Streptomyces spp. to control ZYMV, greenhouse trials were designed with seven treatments including culture broth of three Streptomyces spp. (S. sampsonii, S. rochei and S. griseus) individually or in combinations. Early application of Streptomyces spp. revealed potent antiviral activity against ZYMV infection, inhibited virus replication and promoted plant growth as well as induced systemic resistance. Moreover, physiological stress markers as indicators for systemic acquired resistance were distinguished via significantly enhanced proline, phenols and defense-related enzymes, i.e., catalase, superoxide dismutase and glutathione peroxidase by culture broth treatments, despite the presence of infection. Real-time qPCR assay was a more reliable and accurate detection for quantification ZYMV than conventional PCR. The results revealed that the three Streptomyces spp. novel biocontrol agents produced Behenic alcohol (Docosanol) which provided clues to be potential antiviral mechanisms capable to down-regulate P1 gene expression responsible for virus replication and movement from cell to cell to induce systemic infection as well as safe eco-friendly candidates for the controlling approaches against plant viral pathogens. Conclusion Results suggest that the three Streptomyces spp. provided clues as a novel biocontrol agent having potential antiviral with protective activity and eco-friendly alternative pesticides for managing plant viruses.

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An update about plant growth promoting Streptomyces species

Cited by 3 publications

References 51 publications

Streptomyces at the Heart of Several Sectors to Support Practical and Sustainable Applications: A Review

Streptomyces at the Heart of Several Sectors to Support Practical and Sustainable Applications: A Review

Whole-Genome Sequence Insight into the Plant-Growth-Promoting Bacterium Priestia filamentosa Strain AZC66 Obtained from Zygophyllum coccineum Rhizosphere

Antiviral activities of three Streptomyces spp. against Zucchini yellow mosaic virus (ZYMV) infecting squash (Cucurbita pepo L.) plants

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