Rhizoctonia Root Rot on Sugar beet Cultivars Having Varied Degrees of Resistance

1994 ◽  
Vol 31 (3&4) ◽  
pp. 135-142 ◽  
Author(s):  
E.G. Ruppel ◽  
R.J. Hecker
Keyword(s):  
Sugar Beet ◽  
Root Rot ◽  
Rhizoctonia Root Rot

Mapping of rhizoctonia root rot resistance genes in sugar beet using pathogen response-related sequences as molecular markers

2008 ◽  
Vol 127 (6) ◽  
pp. 602-611 ◽  
Author(s):  
J. C. Lein ◽  
C. M. Sagstetter ◽  
D. Schulte ◽  
T. Thurau ◽  
M. Varrelmann ◽  
...  
Keyword(s):  
Molecular Markers ◽  
Sugar Beet ◽  
Resistance Genes ◽  
Root Rot ◽  
Rhizoctonia Root Rot ◽  
Pathogen Response

scholarly journals Conventional and real-time pcr assays for detection and identification of rhizoctonia solani AG-2-2, the causal agent of root rot of sugar beet

2019 ◽  
Vol 34 (1) ◽  
pp. 19-29
Author(s):  
Mira Vojvodic ◽  
Dejan Lazic ◽  
Petar Mitrovic ◽  
Brankica Tanovic ◽  
Ivana Vico ◽  
...  
Keyword(s):  
Sugar Beet ◽  
Real Time ◽  
Real Time Pcr ◽  
Root Rot ◽  
Direct Detection ◽  
Causal Agent ◽  
Future Research ◽  
Rhizoctonia Root Rot ◽  
Detection And Identification ◽  
High Level

Soil-borne fungi belonging to the genus Rhizoctonia are considered to be among the most destructive sugar beet pathogens. Although multinucleate R. solani AG-2-2 is frequently detected as the main causal agent of root rot of sugar beet worldwide, several binucleate (AG-A, AG-E and AG-K) and multinucleate Rhizoctonia (R. solani AG-4, AG-5 and AG-8) have also been included in the disease complex. Due to their soil-borne nature and wide host range, the management of Rhizoctonia root rot of sugar beet is highly demanding. Identification of Rhizoctonia AG associated with root rot of sugar beet is the essential first step in determining a successful disease management strategy. In this paper we report a highly specific and sensitive real-time PCR protocol for detection of R. solani AG-2-2 which showed a high level of specificity after testing against 10 different anastomosis groups and subgroups, including AG-2-1 as the most closely related. Moreover, a similar conventional PCR assay showed the same specificity but proved to be at least a 100 times less sensitive. Future research will include further testing and adaptation of this protocol for direct detection and quantification of R. solani AG-2-2 in different substrates, including plant tissue and soil samples.

scholarly journals Interaction of Rhizoctonia solani and Rhizopus stolonifer Causing Root Rot of Sugar Beet

Plant Disease ◽  
2010 ◽  
Vol 94 (5) ◽  
pp. 504-509 ◽  
Author(s):  
L. E. Hanson
Keyword(s):  
Sugar Beet ◽  
Root Rot ◽  
Management Practices ◽  
The United States ◽  
Disease Diagnosis ◽  
Rhizopus Stolonifer ◽  
Rhizoctonia Root Rot ◽  
Crown And Root Rot ◽  
Growing Conditions ◽  
Production Areas

In recent years, growers in Michigan and other sugar beet (Beta vulgaris) production areas of the United States have reported increasing incidence of root rot with little or no crown or foliar symptoms in sugar beet with Rhizoctonia crown and root rot. In addition, Rhizoctonia-resistant beets have been reported with higher levels of disease than expected. In examining beets with Rhizoctonia root rot in Michigan, over 50% of sampled roots had a second potential root rot pathogen, Rhizopus stolonifer. Growing conditions generally were not conducive to disease production by this pathogen alone, so we investigated the potential for interaction between these two pathogens. In greenhouse tests, four of five sugar beet varieties had more severe root rot symptoms when inoculated with both pathogens than when inoculated with either pathogen alone. This synergism occurred under conditions that were not conducive to disease production by R. stolonifer. Host resistance to Rhizoctonia crown and root rot reduced diseases severity, but was insufficient to control the disease when both pathogens were present. This raises concerns about correct disease diagnosis and management practices and indicates that a root rot complex may be important on sugar beet in Michigan.

Growing Brassica juncea as a cover crop, then incorporating its residues provide complementary control of Rhizoctonia root rot of sugar beet

2009 ◽  
Vol 113 (3) ◽  
pp. 238-245 ◽  
Author(s):  
Natacha Motisi ◽  
Françoise Montfort ◽  
Vincent Faloya ◽  
Philippe Lucas ◽  
Thierry Doré
Keyword(s):  
Sugar Beet ◽  
Brassica Juncea ◽  
Root Rot ◽  
Cover Crop ◽  
Rhizoctonia Root Rot

scholarly journals Major latex protein-like encoding genes contribute to Rhizoctonia solani defense responses in sugar beet

2020 ◽  
Author(s):  
Louise Holmquist ◽  
Fredrik Dölfors ◽  
Johan Fogelqvist ◽  
Jonathan Cohn ◽  
Thomas Kraft ◽  
...  
Keyword(s):  
Sugar Beet ◽  
Root Rot ◽  
Resistance Breeding ◽  
Defense Responses ◽  
Pcr Analysis ◽  
Homologous Genes ◽  
Rhizoctonia Root Rot ◽  
Disease Information ◽  
Rot Disease ◽  
Encoding Genes

Abstract Sugar beets are attacked by several pathogens that cause root damages. Rhizoctonia (Greek for “root killer”) is one of them. Rhizoctonia root rot has become an increasing problem for sugar beet production and to decrease yield losses agronomical measures are adopted. Here, two partially resistant and two susceptible sugar beet genotypes were used for transcriptome analysis to discover new defense genes to this fungal disease, information to be implemented in molecular resistance breeding. Among 217 transcripts with increased expression at 2 days post-infection (dpi), three resistance-like genes were found. These genes were not significantly elevated at 5 dpi, a time point when increased expression of three Bet v I/Major latex protein (MLP) homologous genes BvMLP1, BvMLP2 and BvML3 was observed in the partially resistant genotypes. Quantitative RT-PCR analysis on diseased sugar beet seedlings validated the activity of BvMLP1 and BvMLP3 observed in the transcriptome during challenge by R. solani. The three BvMLP genes were cloned and overexpressed in Arabidopsis thaliana to further dissect their individual contribution. Transgenic plants were also compared to T-DNA mutants of orthologous MLP genes. Plants overexpressing BvMLP1 and BvMLP3 showed significantly less infection whereas additive effects were seen on Atmlp1/Atmlp3 double mutants. The data suggest that BvMLP1 and BvMLP3 may contribute to the reduction of the Rhizoctonia root rot disease in sugar beet. Impact on the defense reaction from other differential expressed genes observed in the study is discussed.

Sign in / Sign up

Export Citation Format

Share Document