Molecular aspects of biocontrol species of Streptomyces in agricultural crops

Sharma, Vivek; Sharma, Anu; Malannavar, Anudeep B; Salwan, Richa

doi:10.1016/b978-0-12-818469-1.00008-0

Cited by 15 publications

(12 citation statements)

References 208 publications

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“…They produce over 61% of the clinically and agriculturally essential antibiotics (Waksman et al, 2010). Various studies have been conducted to explore the potential of using Streptomyces species as biocontrol agents for controlling plant diseases or biofertilizers to enhance plant growth and yield (Buzón-Durán et al, 2020;Sharma et al, 2020). The molecular mechanisms of Streptomyces species contributed to plant beneficial roles involving the production of chitinases, glucanases, excretion of antifungal metabolites and plant growth regulators, induction of plant immune responses, acting as a mycoparasite of fungal root pathogens, and modulation of enzymatic and defense pathways (Mun et al, 2020;Sharma et al, 2020).…”

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confidence: 99%

“…Various studies have been conducted to explore the potential of using Streptomyces species as biocontrol agents for controlling plant diseases or biofertilizers to enhance plant growth and yield (Buzón-Durán et al, 2020;Sharma et al, 2020). The molecular mechanisms of Streptomyces species contributed to plant beneficial roles involving the production of chitinases, glucanases, excretion of antifungal metabolites and plant growth regulators, induction of plant immune responses, acting as a mycoparasite of fungal root pathogens, and modulation of enzymatic and defense pathways (Mun et al, 2020;Sharma et al, 2020). The findings by Araujo et al (2019) revealed that application of biocontrol Streptomyces strains modulated the wheat root microbiome in R. solani-infested soils by decreasing Paenibacillus and increasing other bacterial and fungal operational taxonomic units.…”

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confidence: 99%

“…The findings by Araujo et al (2019) revealed that application of biocontrol Streptomyces strains modulated the wheat root microbiome in R. solani-infested soils by decreasing Paenibacillus and increasing other bacterial and fungal operational taxonomic units. However, there are limited commercial biopesticide products consisting of live Streptomyces species available (Gwynn, 2021;Sharma et al, 2020). The known commercial biopesticides include Mycostop which is composed of Streptomyces griseoviridis strain K61 (Gwynn, 2021;Palaniyandi et al, 2013), and Actinovate, Micro108 or Actino Iron which contain Streptomyces lydicus strain WYEC 108 (Gwynn, 2021;Yuan and Crawford, 1995).…”

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confidence: 99%

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Field Sanitation and Foliar Application of Streptomyces padanus PMS-702 for the Control of Rice Sheath Blight

Yang

Huang

2021

Plant Pathol J

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Rice sheath blight (ShB), caused by Rhizoctonia solani Kühn AG1-IA, is one of the destructive rice diseases worldwide. The aims of this study were to develop biocontrol strategies focusing on field sanitation and foliar application with a biocontrol agent for ShB management. Streptomyces padanus PMS-702 showed a great antagonistic activity against R. solani. Fungichromin produced by S. padanus PMS-702, at 3.07 mg/l inhibited 50% mycelial growth, caused leakage of cytoplasm, and inhibited the formation of infection structures of R. solani. Fungichromin could reach to 802 mg/l when S. padanus PMS-702 was cultured in MACC broth for 6 days. Addition of 0.5% S. padanus PMS-702 broth into soil decreased the survival rate of the pathogen compared to the control. Soil amended with 0.5% S. padanus broth and 0.5% tea seed pomace resulted in the death of R. solani mycelia in the infested rice straws, and the germination of sclerotia was inhibited 21 days after treatment. Greenhouse trials revealed that S. padanus cultured in soybean meal-glucose (SMGC-2) medium after mixing with different surfactants could enhance its efficacy for inhibiting the pathogen. Of six surfactants tested, the addition of 2% tea saponin was the most effective in suppressing the pathogen. S. padanus broth after being fermented in SMGC-2, mixed with 2% tea saponin, diluted 100 fold, and sprayed onto rice plants significantly reduced ShB disease severity. Thus, S. padanus PMS-702 is an effective biocontrol agent. The efficacy of S. padanus PMS-702 for disease control could be improved through formulation.

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Field Sanitation and Foliar Application of Streptomyces padanus PMS-702 for the Control of Rice Sheath Blight

Yang

Huang

2021

Plant Pathol J

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“…The interface between the biocontrol agent and pathogens may upregulate or downregulate certain semiochemicals. Although there are numerous studies on microbe-specific mVOCs, the full range of their interactions with infections and Actinobacteria is yet to be explored ( Sharma et al, 2020 ). Furthermore, Streptomyces spp.…”

Section: Introductionmentioning

confidence: 99%

Unraveling the tripartite interaction of volatile compounds of Streptomyces rochei with grain mold pathogens infecting sorghum

et al. 2022

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Sorghum is a major grain crop used in traditional meals and health drinks, and as an efficient fuel. However, its productivity, value, germination, and usability are affected by grain mold, which is a severe problem in sorghum production systems, which reduces the yield of harvested grains for consumer use. The organic approach to the management of the disease is essential and will increase consumer demand. Bioactive molecules like mVOC (volatile organic compound) identification are used to unravel the molecules responsible for antifungal activity. The Streptomyces rochei strain (ASH) has been reported to be a potential antagonist to many pathogens, with high levels of VOCs. The present study aimed to study the inhibitory effect of S. rochei on sorghum grain mold pathogens using a dual culture technique and via the production of microbial volatile organic compounds (mVOCs). mVOCs inhibited the mycelial growth of Fusarium moniliforme by 63.75 and Curvularia lunata by 68.52%. mVOCs suppressed mycelial growth and inhibited the production of spores by altering the structure of mycelia in tripartite plate assay. About 45 mVOCs were profiled when Streptomyces rochei interacted with these two pathogens. In the present study, several compounds were upregulated or downregulated by S. rochei, including 2-methyl-1-butanol, methanoazulene, and cedrene. S. rochei emitted novel terpenoid compounds with peak areas, such as myrcene (1.14%), cymene (6.41%), and ç-terpinene (7.32%) upon interaction with F. moniliforme and C. lunata. The peak area of some of the compounds, including furan 2-methyl (0.70%), benzene (1.84%), 1-butanol, 2-methyl-(8.25%), and myrcene (1.12)%, was increased during tripartite interaction with F. moniliforme and C. lunata, which resulted in furan 2-methyl (6.60%), benzene (4.43%), butanol, 2-methyl (18.67%), and myrcene (1.14%). These metabolites were implicated in the sesquiterpenoid and alkane biosynthetic pathways and the oxalic acid degradation pathway. The present study shows how S. rochei exhibits hyperparasitism, competition, and antibiosis via mVOCs. In addition to their antimicrobial functions, these metabolites could also enhance plant growth.

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“…The genus Streptomyces represents soil-inhabiting Grampositive and filamentous bacteria. Members belonging to Streptomyces are one of the largest sources of secondary metabolites such as antibiotics, herbicides, parasiticides, immunosuppressive agents, antitumor compounds and several other compounds of pharmaceutical and industrial importance (Bérdy 2005;Lewis 2013;Sharma et al 2020;. Streptomyces have complex and multicellular lifecycle.…”

Section: Introductionmentioning

confidence: 99%

Streptomyces: host for refactoring of diverse bioactive secondary metabolites

2021

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Microbial secondary metabolites are intensively explored due to their demands in pharmaceutical, agricultural and food industries. Streptomyces are one of the largest sources of secondary metabolites having diverse applications. In particular, the abundance of secondary metabolites encoding biosynthetic gene clusters and presence of wobble position in Streptomyces strains make it potential candidate as a native or heterologous host for secondary metabolite production including several cryptic gene clusters expression. Here, we have discussed the developments in Streptomyces strains genome mining, its exploration as a suitable host and application of synthetic biology for refactoring genetic systems for developing chassis for enhanced as well as novel secondary metabolites with reduced genome and cleaned background.

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Molecular aspects of biocontrol species of Streptomyces in agricultural crops

Cited by 15 publications

References 208 publications

Field Sanitation and Foliar Application of Streptomyces padanus PMS-702 for the Control of Rice Sheath Blight

Field Sanitation and Foliar Application of Streptomyces padanus PMS-702 for the Control of Rice Sheath Blight

Unraveling the tripartite interaction of volatile compounds of Streptomyces rochei with grain mold pathogens infecting sorghum

Streptomyces: host for refactoring of diverse bioactive secondary metabolites

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