Interactions and biocontrol of pathogenic<i>Streptomyces</i>strains co-occurring in potato scab lesions

Hiltunen, Lea; Ojanperä, Taru; Kortemaa, H.; Richter, E.; Lehtonen, Mari; Valkonen, Jari P. T.

doi:10.1111/j.1365-2672.2008.03992.x

Cited by 73 publications

(41 citation statements)

References 61 publications

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“…Streptomycetes are Gram positive, filamentous bacteria that are excellent saprophytes, prolific producers of extracellular enzymes and ubiquitous in soil and marine sediments (Gontang et al, 2007;Chater et al, 2010). Streptomycetes are the source of many clinically significant antibiotics and have been investigated in agricultural settings for their capacities to suppress plant pathogens (Bressan and Figueiredo, 2007;Hiltunen et al, 2009;Karimi et al, 2012;Kinkel et al, 2012;Meschke et al, 2012;Otto-Hanson et al, 2013). Because of their capabilities at producing bioactive compounds and in response to the tremendous therapeutic value of many of these compounds, antibiotic production in Streptomycetes has been studied extensively in vitro.…”

Section: Introductionmentioning

confidence: 99%

Sympatric inhibition and niche differentiation suggest alternative coevolutionary trajectories among Streptomycetes

et al. 2013

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Soil bacteria produce a diverse array of antibiotics, yet our understanding of the specific roles of antibiotics in the ecological and evolutionary dynamics of microbial interactions in natural habitats remains limited. Here, we show a significant role for antibiotics in mediating antagonistic interactions and nutrient competition among locally coexisting Streptomycete populations from soil. We found that antibiotic inhibition is significantly more intense among sympatric than allopatric Streptomycete populations, indicating local selection for inhibitory phenotypes. For sympatric but not allopatric populations, antibiotic inhibition is significantly positively correlated with niche overlap, indicating that inhibition is targeted toward bacteria that pose the greatest competitive threat. Our results support the hypothesis that antibiotics serve as weapons in mediating local microbial interactions in soil and suggest that coevolutionary niche displacement may reduce the likelihood of an antibiotic arms race. Further insight into the diverse roles of antibiotics in microbial ecology and evolution has significant implications for understanding the persistence of antibiotic inhibitory and resistance phenotypes in environmental microbes, optimizing antibiotic drug discovery and developing strategies for managing microbial coevolutionary dynamics to enhance inhibitory phenotypes.

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Section: Introductionmentioning

confidence: 99%

Sympatric inhibition and niche differentiation suggest alternative coevolutionary trajectories among Streptomycetes

et al. 2013

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“…turgidiscabies (Hiltunen et al 2009). Another explanation for the apparent absence of S. turgidiscabies and S. acidiscabies in South Africa could be that the association with potato is weak.…”

Section: Discussionmentioning

confidence: 99%

Streptomyces species associated with common scab lesions of potatoes in South Africa

Jordaan

Waals

2015

Eur J Plant Pathol

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Streptomyces scabiei is largely accepted as the causal organism of common scab on potato in South Africa, and other Streptomyces species associated with common scab are not often considered. This study therefore aims to determine the diversity and prevalence of Streptomycetes associated with common scab on potatoes in South Africa.Isolates from 11 of the 16 potato producing regions in South Africa were characterized morphologically, physiologically and genetically. Most isolates resembled S. scabiei based on morphology and physiology. Most pathogenic isolates were S. scabiei and S. stelliscabiei, and no S. acidiscabies or S. turgidiscabies isolates were found. All three pathogenicity / virulence genes (txtAB, nec1, tomA) were found in South African isolates.Pathogenicity could not be linked to the presence of a single one or any combination of two of the three genes.These results represent the most comprehensive published survey of Streptomycetes isolated from common scab lesions on potatoes in South Africa.

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“…These are important study areas related to plant biotechnology carried out at DAB (Lehtonen et al 2004, 2008a, Mattinen et al 2004, Aittamaa et al 2008, Hiltunen et al 2008, other departments of AF-UH and the Viikki Campus (e.g., Pitkäjärvi et al 2003, Jussila et al 2006, Sjöblom et al 2006. At DAB, these studies are carried out on many crop plant species and their pathogens and also on the model species Arabidopsis thaliana (Karim et al 2007) and the moss, Physcomitrella patens, to understand evolutionary early-developed mechanisms of pathogen defence in plants (Akita and Valkonen 2002, Andersson et al 2005, Lehtonen et al 2006).…”

Section: Molecular Markers and Their Multiple Usesmentioning

confidence: 99%

Plant biotechnology for deeper understanding, wider use and further development of agricultural and horticultural crops

Elomaa¹,

Joensuu²,

Korpelainen³

et al. 2008

AFSci

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Plants bind solar energy to organic matter via photosynthesis and assimilation of carbon dioxide from the atmosphere and comprise the major source of nutrition and bioenergy. Plant biotechnology contributes to solution of important constraints in food and feed production and creates new technologies and applications for the sustainable use of plant resources. Genome-wide approaches such as massive parallel sequencing and microarrays to study gene expression, molecular markers for selection of important traits in breeding, characterization of genetic diversity with the aforementioned approaches, and somatic hybridization and genetic transformation are important tools in plant biotechnology. In this paper, studies carried out on enhanced resistance to viruses and tolerance of cold stress in potato, genetic modification of flower pigmentation and morphology in gerbera, production of edible vaccines in transgenic barley seeds, and expression of heterologous proteins for pharmaceutical purposes from vector viruses were chosen to exemplify the general utility of biotechnological approaches and also how plant biotechnology research has developed on cultivated plants at University of Helsinki. The studies reveal cellular and genetic mechanisms and provide scientific information that can be used for widening the uses of crop plants. They can also be used to detect any putative risks associated with the use of the biotechnological application in agriculture and horticulture and to develop practises which reduce any inadvertent negative consequences that plant production may have to the environment.

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Interactions and biocontrol of pathogenicStreptomycesstrains co-occurring in potato scab lesions

Cited by 73 publications

References 61 publications

Sympatric inhibition and niche differentiation suggest alternative coevolutionary trajectories among Streptomycetes

Sympatric inhibition and niche differentiation suggest alternative coevolutionary trajectories among Streptomycetes

Streptomyces species associated with common scab lesions of potatoes in South Africa

Plant biotechnology for deeper understanding, wider use and further development of agricultural and horticultural crops

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