Efficacy of selected streptomycetes and a streptomycete+pseudomonad combination in the management of selected bacterial and fungal diseases of field tomatoes

Cuppels, Diane A.; Higham, Jonathan; Traquair, J. A.

doi:10.1016/j.biocontrol.2013.09.005

Cited by 22 publications

(18 citation statements)

References 43 publications

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“…Two different soil types which were Pythium ‐infested were used and were challenged by adding biocontrol strains as seed coats in order to determine the plant and microbiota responses when exposed to such conditions. The effects observed in the wheat plants regarding root weight, plant length, and increased number of wheat heads in the presence of the FU14 strain were similar to previously published results for other biocontrol strains performed in our and other research laboratories (Cook et al , ; Franco et al , ; ; Orakçı et al , ; Yang et al , ; Cuppels et al , ; Araujo et al , ; ). In addition, it was possible not only to define a list of OTUs that characterized the core microbiota present in all stages of the crop growth but also a succession of OTUs and taxonomic groups found at particular stages.…”

Section: Discussionsupporting

confidence: 89%

“…Some endophytes were shown to be able to reduce Pythium disease on wheat and other cereals, and their potential as biocontrol inoculants has been well documented (Mavrodi et al , ; Araujo et al , ). Nevertheless, the results of field trials and greenhouse tests often disagree, which can only be partly explained by climatic conditions (Franco et al , ; Cuppels et al , ; Araujo et al , ; Shi et al , ). It is possible that different cultivation systems, such as field versus greenhouse, may affect the soil biodiversity and promote taxa changes, even when the same starting soil is used.…”

Section: Introductionmentioning

confidence: 99%

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Analogous wheat root rhizosphere microbial successions in field and greenhouse trials in the presence of biocontrol agents Paenibacillus peoriae SP9 and Streptomyces fulvissimus FU14

Araújo

Dunlap

Franco

2020

Molecular Plant Pathology

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Two Pythium‐infested soils were used to compare the wheat root and rhizosphere soil microbial communities from plants grown in the field or in greenhouse trials and their stability in the presence of biocontrol agents. Bacteria showed the highest diversity at early stages of wheat growth in both field and greenhouse trials, while fungal diversity increased later on, at 12 weeks of the crop cycle. The microbial communities were stable in roots and rhizosphere samples across both soil types used in this study. Such stability was also observed irrespective of the cultivation system (field or greenhouse) or addition of biocontrol coatings to wheat seeds to control Pythium disease (in this study soil infected with Pythium sp. clade F was tested). In greenhouse plant roots, Archaeorhizomyces, Debaryomyces, Delftia, and unclassified Pseudeurotiaceae were significantly reduced when compared to plant roots obtained from the field trials. Some operational taxonomic units (OTUs) represented genetic determinants clearly transmitted vertically by seed endophytes (specific OTUs were found in plant roots) and the plant microbiota was enriched over time by OTUs from the rhizosphere soil. This study provided key information regarding the microbial communities associated with wheat roots and rhizosphere soils at different stages of plant growth and the role that Paenibacillus and Streptomyces strains play as biocontrol agents in supporting plant growth in infested soils.

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Section: Discussionsupporting

confidence: 89%

Section: Introductionmentioning

confidence: 99%

Analogous wheat root rhizosphere microbial successions in field and greenhouse trials in the presence of biocontrol agents Paenibacillus peoriae SP9 and Streptomyces fulvissimus FU14

Araújo

Dunlap

Franco

2020

Molecular Plant Pathology

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“…The vermicompost have been extensively used in organic agriculture owing to its potential of promoting plant growth and inhibiting phytopathogens [6,7,9]. The use of these microbes as potential bioweapon based on antagonism offers a powerful alternative to synthetic chemicals against soil borne diseases.…”

Section: Isolation and Selection Of Antagonistic Actinomycetesmentioning

confidence: 99%

“…There are some reports on the agricultural implications of actinomycetes as bioweapon against phytopathogen [5,6]. Despite numerous commercial products of actinomycetes available for plant disease management, these organisms are still unexplored for providing host resistance in comparison with plant growth promoting rhizobacteria (PGPR) and fungi [7].…”

Section: Introductionmentioning

confidence: 99%

Antagonistic Actinomycetes Mediated Resistance in Solanum lycopersicon Mill. Against Rhizoctonia solani Kühn

Singh

Gupta

Gaur

et al. 2015

Proc. Natl. Acad. Sci., India, Sect. B Biol. Sci.

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Actinomycetes are a major group of beneficial microbes, which can be explored as spanking alternative to chemical fungicides for providing defense against phytopathogens. Rhizoctonia solani is a major havoc causing severe loss to many crops. Biological measures for fungal disease management are desired over the available chemical/synthetic fungicides owing to their safety towards nontarget organisms. In the present study, 34 actinomycetes were isolated from vermicompost. Out of them, twelve revealed antifungal activity related to Indole acetic acid (IAA) production, siderophores and plant growth promotion. Under greenhouse and field conditions, these potent strains remarkably enhanced yield attributes and disease diminution as compared to untreated control. A significant disease reduction of 47-63 % against R. solani was observed in tomato plants pretreated with actinomycetes. Furthermore, induction in defense related enzymes such as peroxidase, polyphenol oxidase, phenylalanine ammonia lyase, accumulation of phenolics and flavonoids were also observed in actinomycetes treated plants. Morphological and molecular characterization analysis identified these potent isolates as Streptomyces sp. NBM3, Streptomyces sp. NBM2, Streptomyces sp. NBM1, Streptomyces sp. NBM12 and Streptomyces sp. NBM8. The present findings suggest that these microbes can be utilized for significant enhancement of plant growth and augmentation of defense related enzymes in order to cope up with R. solani induced stress, thereby contributing to crop health.

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“…Many Streptomyces bacteria produce and release lytic enzymes and antibiotics that are able to hydrolyze a broad range of polymeric compounds including chitin, cellulose, hemicelllulose and DNA (Minuto et al 2006;de Lima Proc opio et al 2012). Expression and secretion of these enzymes by various microbes can sometimes lead to direct control of plant pathogens (Cuppels et al 2013). Streptomyces species can spread extensively, grow as long strands in soils, and are able to colonize plant root surface, produce powerful antifungal and antibacterial compounds, inhibit growth of microorganisms and produce chemically diverse secondary metabolites (Large et al 1999;Sabaratnam and Traquair 2002;Bakker et al 2010;Kinkel et al 2012).…”

Section: Discussionmentioning

confidence: 99%

Application of Soil‐borne Actinomycetes for Biological Control against Fusarium Wilt of Chickpea (Cicer arietinum) caused by Fusarium solani fsp pisi

Soltanzadeh

Nejad

Bonjar

2016

Journal of Phytopathology

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Black root rot, caused by Fusarium solani f.sp. pisi, is a devastating soil‐borne disease in chickpea in Iran with no effective control measures. With the aim of finding applicable biocontrol agents to alleviate the malady, isolates of Actinomycetes isolated from soil and their antagonistic effect against F. solani f.sp. pisi were evaluated both in vitro and in vivo. More than 100 Actinomycetes isolates were screened for their antifungal activities against the pathogen. The most active isolates were evaluated in greenhouse for their biocontrol performance. Based on the results of dual cultures in screening evaluations, the size of inhibition zone of fungal growth, and the most effective antagonist isolates (S3, S12 and S40) were selected for further studies. Identity of active isolates was determined, in this regard, 16S rDNA of isolates were amplified using universal bacterial primers FD1 and RP2. The PCR products were purified and sequenced. Sequence analysis of 16S rDNA was then performed using NCBI BLAST method. Comparison of the near full length 16S rRNA sequence of isolates to GenBank sequences demonstrated that isolates S3 and S12 were most similar to Streptomyces antibioticus, while isolate S40 was most similar to Streptomyces peruviensis. Biocontrol studies of these isolates in control of the disease in greenhouse significantly decreased the disease severity. Actinomycetes isolate S12 demonstrated the greatest effect in reducing disease than the other two. Results of this research are at preliminary stage for developing biocontrol agents. These data can be utilized as a platform for future studies with the aim of commercializing these biocontrol products and hoping to step towards sustainable agriculture.

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Efficacy of selected streptomycetes and a streptomycete+pseudomonad combination in the management of selected bacterial and fungal diseases of field tomatoes

Cited by 22 publications

References 43 publications

Analogous wheat root rhizosphere microbial successions in field and greenhouse trials in the presence of biocontrol agents Paenibacillus peoriae SP9 and Streptomyces fulvissimus FU14

Analogous wheat root rhizosphere microbial successions in field and greenhouse trials in the presence of biocontrol agents Paenibacillus peoriae SP9 and Streptomyces fulvissimus FU14

Antagonistic Actinomycetes Mediated Resistance in Solanum lycopersicon Mill. Against Rhizoctonia solani Kühn

Application of Soil‐borne Actinomycetes for Biological Control against Fusarium Wilt of Chickpea (Cicer arietinum) caused by Fusarium solani fsp pisi

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