scholarly journals Plant Phenotypic and Transcriptional Changes Induced by Volatiles from the Fungal Root Pathogen Rhizoctonia solani

2017 ◽  
Vol 8 ◽  
Author(s):  
Viviane Cordovez ◽  
Liesje Mommer ◽  
Kay Moisan ◽  
Dani Lucas-Barbosa ◽  
Ronald Pierik ◽  
...  
Keyword(s):  
Rhizoctonia Solani ◽  
Root Pathogen ◽  
Transcriptional Changes

scholarly journals Transcriptional Changes in Potato Sprouts upon Interaction with Rhizoctonia solani Indicate Pathogen-Induced Interference in the Defence Pathways of Potato

2021 ◽  
Vol 22 (6) ◽  
pp. 3094
Author(s):  
Rita Zrenner ◽  
Bart Verwaaijen ◽  
Franziska Genzel ◽  
Burkhardt Flemer ◽  
Rita Grosch
Keyword(s):  
Rhizoctonia Solani ◽  
Rna Sequencing ◽  
Control Strategies ◽  
Transcriptional Response ◽  
Black Scurf ◽  
Post Inoculation ◽  
Molecular Response ◽  
Resistance Level ◽  
Sequencing Experiment ◽  
Transcriptional Changes

Rhizoctonia solani is the causer of black scurf disease on potatoes and is responsible for high economical losses in global agriculture. In order to increase the limited knowledge of the plants’ molecular response to this pathogen, we inoculated potatoes with R. solani AG3-PT isolate Ben3 and carried out RNA sequencing with total RNA extracted from potato sprouts at three and eight days post inoculation (dpi). In this dual RNA-sequencing experiment, the necrotrophic lifestyle of R. solani AG3-PT during early phases of interaction with its host has already been characterised. Here the potato plants’ comprehensive transcriptional response to inoculation with R. solani AG3 was evaluated for the first time based on significantly different expressed plant genes extracted with DESeq analysis. Overall, 1640 genes were differentially expressed, comparing control (−Rs) and with R. solani AG3-PT isolate Ben3 inoculated plants (+Rs). Genes involved in the production of anti-fungal proteins and secondary metabolites with antifungal properties were significantly up regulated upon inoculation with R. solani. Gene ontology (GO) terms involved in the regulation of hormone levels (i.e., ethylene (ET) and jasmonic acid (JA) at 3 dpi and salicylic acid (SA) and JA response pathways at 8 dpi) were significantly enriched. Contrastingly, the GO term “response to abiotic stimulus” was down regulated at both time points analysed. These results may support future breeding efforts toward the development of cultivars with higher resistance level to black scurf disease or the development of new control strategies.

Molecular and physiological comparison ofAzospirillumspp. isolated fromRhizoctonia solanimycelia, wheat rhizosphere, and human skin wounds

2004 ◽  
Vol 50 (4) ◽  
pp. 291-297 ◽  
Author(s):  
Michael F Cohen ◽  
Xiang Y Han ◽  
Mark Mazzola
Keyword(s):  
Rhizoctonia Solani ◽  
Azospirillum Brasilense ◽  
Type Strain ◽  
Apple Orchard ◽  
Rrna Gene ◽  
Bacterial Strains ◽  
Free Living ◽  
Root Pathogen ◽  
Wide Range ◽  
Orchard Soil

Four phenotypically similar bacterial strains isolated from fungal, plant, and human sources were identified as Azospirillum species. Strains RC1 and LOD4 were isolated from the mycelium of the apple root pathogen Rhizoctonia solani AG 5 and from the rhizosphere of wheat grown in apple orchard soil, respectively. Strains C610 and F4626 isolated from human wounds were previously misclassified as Roseomonas genomospecies 3 and 6. All four strains demonstrated close similarities in 16S rRNA gene sequences, having [Formula: see text]97% identity to Azospirillum brasilense type strain ATCC 29145 and <90% identity to Roseomonas gilardii, the Roseomonas type strain. Extensive phenotypic similarities among the four strains included the ability of free-living cells to fix N2. Cells of strains RC1, LOD4, and C610 but not of strain F4626 could be induced to flocculate by incubation with 10 mmol·L–1glycerol or fructose in medium containing 0.5 mmol·L–1NO3–. Our results indicate a wide range of potential sources for Azospirillum spp. with the isolation of Azospirillum spp. from human wounds warranting further investigation.Key words: Azospirillum brasilense, Roseomonas fauriae, flocculation, Rhizoctonia solani.

Interactions between the root pathogen Rhizoctonia solani AG-8 and acetolactate-synthase-inhibiting herbicides in barley

2012 ◽  
Vol 68 (6) ◽  
pp. 845-852 ◽  
Author(s):  
Hyejin Lee ◽  
Steven E Ullrich ◽  
Ian C Burke ◽  
Joseph Yenish ◽  
Timothy C Paulitz
Keyword(s):  
Rhizoctonia Solani ◽  
Acetolactate Synthase ◽  
Root Pathogen

Some factors affecting the survival of the cereal root pathogen Ophiobolus graminis in wheat straw

1971 ◽  
Vol 11 (48) ◽  
pp. 90 ◽  
Author(s):  
SC Chambers
Keyword(s):  
Field Experiment ◽  
Rhizoctonia Solani ◽  
Wheat Straw ◽  
South African ◽  
Plant Species ◽  
Ammonium Sulphate ◽  
Soil Amendment ◽  
Root Pathogen ◽  
Factors Affecting ◽  
Cereal Root

The saprophytic survival of Ophiobolus graminis was studied under laboratory and field conditions using artificially-infected wheat-straw buried in a Victorian Mallee soil.In pot tests, survival was prolonged by applications of ammonium sulphate, unaffected by superphosphate dressings and reduced by growing oats over infected straw. The observed effect if the nitrogenous soil amendment was not dependent upon the presence of Rhizoctonia solani as reported for South African soils.In a field experiment, survival was reduced significantly more by growing various plant species over infected straws than by maintaining fallow conditions. O graminis was isolated from all species, including dicotyledons, sown over infected straw

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