Biological Control of Tomato Seedling Damping off with Streptomyces
sp.

Dhanasekaran, D.; Sivamani, P.; Panneerselvam, A.; Thajuddin, Nooruddin; Rajakumar, G.; Selvamani, S.

doi:10.3923/ppj.2005.91.95

Cited by 27 publications

(9 citation statements)

References 13 publications

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“…The genus Streptomyces has been studied broadly in the past decades and reported for the production of antifungal compounds (46-49). Since the biocontrol agents' shelf-life is dependent on environmental conditions such as soil temperature, soil pH, nutrient availability and water status, one of the major issues in the commercialization of biocontrol agents is their loss of viability over time (50). However, antifungal metabolites produced by Streptomyces sp.SP5 was found to be photo-thermostable and pH stable.…”

Section: Discussionmentioning

confidence: 99%

Investigating the Plant Growth Promoting and Biocontrol Potentiality of Endophytic Streptomyces sp. SP5 Against Early Blight in Tomato Seedling

Devi

Sharma

2021

Preprint

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Background: Early blight (EB), caused by Alternaria solani, is one of the alarming diseases that restrict tomato production globally. Existing cultural practices and fungicide applications are not enough to control the early blight diseases. Therefore, the study aimed to isolate, identify, and characterize an endophytic Streptomyces strain exhibiting the potential to control early blight in tomato and also promote plant growth. Results: From a Citrus jambhiri leaf, an endophytic Streptomyces sp. SP5 isolated with antagonistic activity against Alternaria solani, Colletotrichum acutatum, Cladosporium herbarum, Alternaria brassicicola, Alternaria alternata, Fusarium oxysporum and Fusarium moniliforme. It was identified as a Streptomyces sp. designated as SP5 through 16S ribosomal DNA sequence analysis. It also produced 40μg/ml indole acetic acid which was further confirmed by TLC and HPLC analyses. Treatment of pathogen infected plants with Streptomyces sp. SP5 antagonist (culture cells/culture supernatant/solvent extract/ acetone precipitates) decreased the early blight disease incidence and significantly increased the various agronomic traits Conclusion: The present study concluded that Streptomyces sp. SP5 possessed antifungal activity against different fungal pathogens and had significant potential to control early blight disease in tomatoes and also promote plant growth by producing IAA.

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Section: Discussionmentioning

confidence: 99%

Investigating the Plant Growth Promoting and Biocontrol Potentiality of Endophytic Streptomyces sp. SP5 Against Early Blight in Tomato Seedling

Devi

Sharma

2021

Preprint

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“…The method of Dhanasekaran et al (2005) was used for the preparation of R. solani suspension. Potato Dextrose Agar (PDA) plates were inoculates with the pathogen and incubated at 25°C for 6 days.…”

Section: Microbial Suspensionsmentioning

confidence: 99%

“…The R. solani symptoms were noted using a 5-class scale (Dhanasekaran et al 2005): no symptom (0); 0-25% of root browning (1); 26-50% of root browning (2); 51 -75% of root browning (3); 76-100% of root browning (4) and plant death (5). Annotations were converted to DSI using the following equation:…”

Section: In Vivo Biocontrol Trialsmentioning

confidence: 99%

Formulation of biofungicides based on Streptomyces lincolnensis strain SZ03 spores and efficacy against R. solani damping-off of tomato seedlings

Zamoum¹,

Allali²,

Benadjila

et al. 2022

Preprint

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This work aimed to explore an antagonistic actinobacterial strain isolated from roots of Ziziphus lotus in bioformulation processes and the biocontrol of Rizoctonia solani damping-off of tomato seedlings. The strain Streptomyces lincolnensis SZ03 was investigated for the principal in vitro biocontrol mechanisms and then formulated in three different biofungicides Wettable Talcum Powder (WTP), Sodium-Alginate Propagules (SAP) and Clay Sodium-Alginate Propagules (CAP). Compared to a marketed control products (Serenade® and Acil 060FS®), the formulated biofungicides were investigated against the R. solani damping-off of tomato cv. Aïcha seedlings. The strain S. lincolnensis SZ03 produced chitinases, cellulases, β-1,3-glucanases, cyanhydric acid and siderophores and it showed strong antagonistic effect on the mycelial growth of R. solani. Bioautographic and HPLC analysis revealed the production of a single antifungal compound. The biofungicide WTP showed an attractive biocontrol effect by reducing significantly the disease severity index (DSI) compared to untreated seeds. No significant differences were obtained compared to the chemical treatment with Acil 060FS®. The viability of spores and biocontrol efficacy of the WTP were confirmed after one year storage. S. lincolnensis strain SZ03 has never been reported in the biocontrol of phytopathogenic fungal diseases and it open up very attractive prospects in the fields of biocontrol and crop improvement.

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“…Previous studies reported the role of Streptomyces in the biocontrol of soil-borne phytopathogens such as Foc TR4 ( Yun et al, 2021 ), Glomerella cingulata ( Marian et al, 2020 ), Sclerotium rolfsii ( Singh and Gaur, 2016 ), Botrytis cinerea ( El-Shatoury et al, 2020 ), and Alternaria brassicicola ( Hassan et al, 2017 ). The success of Streptomyces as a potential biocontrol agent encourages research into new microbial agents as alternatives to chemical fungicides ( Dhanasekaran et al, 2005 ; Jing et al, 2020 ; Zhang et al, 2021 ).…”

Section: Introductionmentioning

confidence: 99%

Biocontrol Potential of Endophytic Streptomyces malaysiensis 8ZJF-21 From Medicinal Plant Against Banana Fusarium Wilt Caused by Fusarium oxysporum f. sp. cubense Tropical Race 4

et al. 2022

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Banana (Musa spp.) is an important fruit crop cultivated in most tropical countries. Banana Fusarium wilt caused by Fusarium oxysporum f. sp. cubense tropical race 4 (Foc TR4) is the most destructive fungal disease. Biocontrol using endophytic microorganisms is considered as a safety and sustainable strategy. Actinomycetes have a potential for the production of diverse metabolites. Isolation of endophytic actinomycetes with high efficiency and broad-spectrum antagonism is key for exploring biocontrol agents. Our previous study showed that a total of 144 endophytic actinomycetes were isolated from different tissues of medicinal plants in Hainan, China. Especially, strain 8ZJF-21 exhibited a broad-spectrum antifungal activity. Its morphological, physiological, and biochemical characteristics were consistent with the genus Streptomyces. The phylogenetic tree demonstrated that strain 8ZJF-21 formed a distinct clade with Streptomyces malaysiensis. Average nucleotide identity (ANI) was 98.49% above the threshold of novel species. The pot experiment revealed that endophytic Streptomyces malaysiensis 8ZJF-21 could improve the plant resistance to Foc TR4 by enhancing the expression levels of defense-related and antioxidant enzyme genes. It also promoted the plant growth by producing several extracellular enzymes and metabolites. Antifungal mechanism assays showed that S. malaysiensis 8ZJF-21 extract inhibited mycelial growth and spore germination of Foc TR4 in vitro. Pathogenic cells occurred cytoplasmic heterogeneity, disappeared organelles, and ruptured ultrastructure. Sequencing and annotation of genome suggested that S. malaysiensis 8ZJF-21 had a potential of producing novel metabolites. Nineteen volatile organic compounds were obtained from the extract by Gas Chromatography-Mass Spectrometry (GC-MS). Hence, endophytic Streptomyces strains will become essential biocontrol agents of modern agricultural practice.

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Biological Control of Tomato Seedling Damping off with Streptomyces sp.

Cited by 27 publications

References 13 publications

Investigating the Plant Growth Promoting and Biocontrol Potentiality of Endophytic Streptomyces sp. SP5 Against Early Blight in Tomato Seedling

Investigating the Plant Growth Promoting and Biocontrol Potentiality of Endophytic Streptomyces sp. SP5 Against Early Blight in Tomato Seedling

Formulation of biofungicides based on Streptomyces lincolnensis strain SZ03 spores and efficacy against R. solani damping-off of tomato seedlings

Biocontrol Potential of Endophytic Streptomyces malaysiensis 8ZJF-21 From Medicinal Plant Against Banana Fusarium Wilt Caused by Fusarium oxysporum f. sp. cubense Tropical Race 4

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