Thyme and suico essential oils: promising natural tools for potato common scab control

Plant Biology ◽  
2019 ◽  
Vol 22 (1) ◽  
pp. 81-89 ◽  
Author(s):  
M. C. Prieto ◽  
M. I. Lapaz ◽  
E. I. Lucini ◽  
M. J. Pianzzola ◽  
N. R. Grosso ◽  
...  
Keyword(s):  
Essential Oils ◽  
Common Scab ◽  
Scab Control ◽  
Potato Common Scab

scholarly journals Characterization of a New Streptomyces Strain, DS3024, That Causes Potato Common Scab

Plant Disease ◽  
2009 ◽  
Vol 93 (12) ◽  
pp. 1329-1334 ◽  
Author(s):  
J. J. Hao ◽  
Q. X. Meng ◽  
J. F. Yin ◽  
W. W. Kirk
Keyword(s):  
Common Scab ◽  
Potato Tubers ◽  
North Central ◽  
Thaxtomin A ◽  
The North ◽  
Streptomyces Spp ◽  
Common Marker ◽  
Central United States ◽  
Potato Common Scab

A novel strain of Streptomyces (named DS3024) was isolated from a potato field in Michigan in 2006. The taxonomy of the organism was determined by morphology, biochemistry, and genetic analysis. Analysis of the 16S ribosomal RNA gene sequence indicated that the organism was most similar to an isolate of Streptomyces sp., ME02-6979.3a, which is not pathogenic to potato tubers but is distinct from other known pathogenic Streptomyces spp. Strain DS3024 has genes that encode thaxtomin synthetase (txtAB), which is required for pathogenicity and virulence, and tomatinase (tomA), which is a common marker for many pathogenic Streptomyces spp. However, the nec1 gene (associated with virulence in most pathogenic Streptomyces spp.) was not detected. The new strain was capable of growth at pH 4.5, caused necrosis on potato tuber slices, and produced thaxtomin A. In greenhouse experiments, DS3024 caused scab symptoms on potato tubers similar to those caused by Streptomyces scabies on tubers of potato cv. Atlantic, which is scab susceptible. We propose that DS3024 is a new strain of Streptomyces capable of causing common scab on potato tubers. The prevalence of this strain of Streptomyces in potato-producing areas in the north-central United States has not been determined.

Bacillus altitudinis strain AMCC 101304: a novel potential biocontrol agent for potato common scab

2019 ◽  
Vol 29 (10) ◽  
pp. 1009-1022 ◽  
Author(s):  
Binying Li ◽  
Bing Wang ◽  
Peng Pan ◽  
Peigen Li ◽  
Zhiguo Qi ◽  
...  
Keyword(s):  
Common Scab ◽  
Biocontrol Agent ◽  
Bacillus Altitudinis ◽  
Potential Biocontrol Agent ◽  
Potato Common Scab

FUNGICIDAL CONTROL OF POTATO COMMON SCAB

1960 ◽  
Vol 9 (2) ◽  
pp. 61-62
Author(s):  
W. R. Rosser
Keyword(s):  
Common Scab ◽  
Potato Common Scab

scholarly journals Phenazine Production by Pseudomonas sp. LBUM223 Contributes to the Biological Control of Potato Common Scab

2013 ◽  
Vol 103 (10) ◽  
pp. 995-1000 ◽  
Author(s):  
Tanya Arseneault ◽  
Claudia Goyer ◽  
Martin Filion
Keyword(s):  
Common Scab ◽  
Soil Conditions ◽  
Pseudomonas Sp ◽  
Thaxtomin A ◽  
Potato Common Scab ◽  
Phenazine Production ◽  
Pathogen Populations ◽  
The Impact ◽  
Important Disease

Common scab of potato is mainly caused by Streptomyces scabies. Currently, no method can efficiently control this economically important disease. We have previously determined that Pseudomonas sp. LBUM223 exhibits antagonistic properties toward S. scabies under in vitro conditions. Inhibition was mainly attributed to phenazine-1-carboxylic acid (PCA) production because an isogenic mutant of LBUM223 (phzC–), not producing PCA, was incapable of significantly reducing S. scabies growth. In order to understand the impact of PCA production by LBUM223 in controlling common scab under soil conditions, pot experiments were performed to determine its effect on (i) reducing scab symptoms development, (ii) S. scabies population dynamics, and (iii) txtA expression in S. scabies, a key gene involved in thaxtomin A biosynthesis and required for pathogenesis. Symptoms were significantly reduced following inoculation with LBUM223 but not its mutant. Surprisingly, pathogen populations increased in the geocaulosphere in the presence of both wild-type and mutant strains of LBUM223; however, significant repression of txtA expression in S. scabies was only observed in the presence of PCA-producing LBUM223, not its mutant. These results suggest that, under soil conditions, PCA production by LBUM223 does not control common scab development by antibiosis but, instead, reduces S. scabies thaxtomin A production in the geocaulosphere, leading to reduced virulence.

scholarly journals Microbial Communities Associated with Potato Common Scab-Suppressive Soil Determined by Pyrosequencing Analyses

Plant Disease ◽  
2012 ◽  
Vol 96 (5) ◽  
pp. 718-725 ◽  
Author(s):  
Noah Rosenzweig ◽  
James M. Tiedje ◽  
John F. Quensen ◽  
Qingxiao Meng ◽  
Jianjun J. Hao
Keyword(s):  
Microbial Communities ◽  
Common Scab ◽  
Disease Suppression ◽  
Rrna Gene ◽  
Suppressive Soil ◽  
Streptomyces Spp ◽  
Potato Common Scab ◽  
Order Of Magnitude ◽  
Disease Suppressive Soil ◽  
Conducive Soil

Potato common scab, caused by Streptomyces spp., is an annual production problem for potato growers, and not effectively controlled by current methods. A field with naturally occurring common scab suppression has been identified in Michigan, and confirmed to have a biological basis for this disease suppression. This field and an adjacent scab nursery conducive to disease were studied using pyrosequencing to compare the two microbial communities. Total DNA was extracted from both the disease-conducive and -suppressive soils. A phylogenetically taxon-informative region of the 16S rRNA gene was used to establish operational taxonomic units (OTUs) to characterize bacterial community richness and diversity. In total, 1,124 OTUs were detected and 565 OTUs (10% dissimilarity) were identified in disease-conducive soil and 859 in disease-suppressive soil, including 300 shared both between sites. Common phyla based on relative sequence abundance were Acidobacteria, Proteobacteria, and Firmicutes. Sequences of Lysobacter were found in significantly higher numbers in the disease-suppressive soil, as were sequences of group 4 and group 6 Acidobacteria. The relative abundance of sequences identified as the genus Bacillus was significantly higher by an order of magnitude in the disease-conducive soil.

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