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Potential of Bioremediation and PGP Traits in Streptomyces as Strategies for Bio-Reclamation of Salt-Affected Soils for Agriculture
Article

Evaluation of Biocontrol Activities of Streptomyces spp. against Rice Blast Disease Fungi

1
Division of Biotechnology, Faculty of Science, Maejo University, Chiang Mai 50290, Thailand
2
Department of Biology and Biotechnology, Faculty of Science and Technology, Nakhon Sawan Rajabhat University, Nakhon Sawan 60000, Thailand
3
Department of Biology, Faculty of Science, Chiang Mai University, Chiang Mai 50200, Thailand
4
Center of Excellence in Microbial Diversity and Sustainable Utilization, Faculty of Science, Chiang Mai University, Chiang Mai 50200, Thailand
*
Author to whom correspondence should be addressed.
Pathogens 2020, 9(2), 126; https://doi.org/10.3390/pathogens9020126
Received: 15 December 2019 / Revised: 11 February 2020 / Accepted: 12 February 2020 / Published: 15 February 2020
(This article belongs to the Special Issue Streptomyces Microbiomes in Agriculture)
Rhizosphere bacteria can positively influence plant growth by direct and indirect mechanisms. A total of 112 bacterial strains were isolated from the rhizosphere of rice and tested for plant beneficial activities such as siderophore production, cell-wall-degrading enzyme production, hydrogen cyanide (HCN) production and antifungal activity against rice blast disease fungus. The actinomycetes count was 3.8 × 106 CFU/g soil. Streptomyces strains PC 12, D 4.1, D 4.3 and W1 showed strong growth inhibition of blast disease fungus, Pyricularia sp. (87.3%, 82.2%, 80.0% and 80.5%) in vitro. Greenhouse experiments revealed that rice plants treated with Streptomyces strain PC 12 recorded maximum plant height, root length and root dry weight compared to the control. Taxonomic characterization of this strain on the basis of 16S rRNA gene sequence led to its identification as Streptomyces palmae PC 12. Streptomyces palmae PC 12 may be used as biofertilizer to enhance the growth and productivity of commercially important rice cultivar RD6 and the biocontrol of blast disease fungus. View Full-Text
Keywords: biological control; Oryza sativa; rice blast disease; Pyricularia sp.; Streptomyces sp.; plant growth promotion; greenhouse condition biological control; Oryza sativa; rice blast disease; Pyricularia sp.; Streptomyces sp.; plant growth promotion; greenhouse condition
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MDPI and ACS Style

Chaiharn, M.; Theantana, T.; Pathom-aree, W. Evaluation of Biocontrol Activities of Streptomyces spp. against Rice Blast Disease Fungi. Pathogens 2020, 9, 126. https://doi.org/10.3390/pathogens9020126

AMA Style

Chaiharn M, Theantana T, Pathom-aree W. Evaluation of Biocontrol Activities of Streptomyces spp. against Rice Blast Disease Fungi. Pathogens. 2020; 9(2):126. https://doi.org/10.3390/pathogens9020126

Chicago/Turabian Style

Chaiharn, Mathurot, Teerayut Theantana, and Wasu Pathom-aree. 2020. "Evaluation of Biocontrol Activities of Streptomyces spp. against Rice Blast Disease Fungi" Pathogens 9, no. 2: 126. https://doi.org/10.3390/pathogens9020126

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