The Initial Steps of the Infection Process in Rhizoctonia Solani

Keijer, Jaap

doi:10.1007/978-94-017-2901-7_13

Cited by 44 publications

(35 citation statements)

References 34 publications

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“…The high concentration of some amino acid in susceptible host plants provides suitable conditions for growth and development of pathogens through nutrient supplies (Seifi et al, 2013). In addition, certain amino acid influences the pathogen development in the mechanism of pathogen infection by act as chemical exudates to attract the germination of R. solani (Keijer, 1996). branch on metabolic flow during R. solani inoculation was not revealed as an MPP analysis result (Figures 4 and 5).…”

Section: Discussionmentioning

confidence: 97%

Metabolite profiling of sheath blight disease resistance in rice: in the case of positive ion mode analysis by CE/TOF-MS

Suharti

Nose

Zheng

2016

Plant Production Science

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Rice sheath blight is an important disease caused by Rhizoctonia solani. The resistant and susceptible rice lines (32R and 29S, respectively) showed different responses to R. solani infection in metabolite levels. The aim of this study was to characterize the metabolite levels in rice lines during R. solani infection using capillary electrophoresis equipped with time of flight mass spectrophotometry (CE/TOF-MS) in positive ion mode. Hundred metabolites were identified and classified into six clusters by hierarchical cluster using Mass Profiler Professional software. Changes in metabolite level at inoculated 32R and 29S were mapped on branches of tricarboxylic acid and glycolysis pathway. Volcano plot successfully filtered the metabolites based on fold change and p-value. The volcano plot result showed that 10 metabolites were up and down regulated in inoculated 32R relative to 29S. One metabolite, chlorogenic acid, showed a positive response in 32R. Meanwhile, pipecolic acid showed as the highest magnitude of fold change and p-value significance level in 29S. In addition, eight amino acids; glutamate, γ-aminobutyric acid, glycine, histidine, phenylalanine, serine, tryptophan, and tyrosine showed increase in 29S after R. solani inoculation.

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Section: Discussionmentioning

confidence: 97%

Metabolite profiling of sheath blight disease resistance in rice: in the case of positive ion mode analysis by CE/TOF-MS

Suharti

Nose

Zheng

2016

Plant Production Science

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“…Keijer [9] reported two distinct observations during the early steps of an incompatible infection process. Stomatal penetration of R. solani AG 2 BI resulted in hypersensitive-like lesions on cauliflower stems, while AG 3 could not adhere to the cauliflower surface nor proceed to further steps of the infection process.…”

Section: Introductionmentioning

confidence: 99%

Interactions between cauliflower and Rhizoctonia anastomosis groups with different levels of pathogenicity

Pannecoucque

Höfte

2009

BMC Plant Biol

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Background: The soil borne fungus Rhizoctonia is one of the most important plant pathogenic fungi, with a wide host range and worldwide distribution. In cauliflower (Brassica oleracea var. botrytis), several anastomosis groups (AGs) including both multinucleate R. solani and binucleate Rhizoctonia species have been identified showing different levels of aggressiveness. The infection and colonization process of Rhizoctonia during pathogenic interactions is well described. In contrast, insights into processes during interactions with weak aggressive or non-pathogenic isolates are limited. In this study the interaction of cauliflower with seven R. solani AGs and one binucleate Rhizoctonia AG differing in aggressiveness, was compared. Using microscopic and histopathological techniques, the early steps of the infection process, the colonization process and several host responses were studied.

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“…Typically, R. solani infects roots and stems by direct penetration of the host through the formation of multilayered infection cushions or simple appressoria. Colonization of the host is commonly characterized by cell wall degradation, plasmolysis, and cell death in advance of the hyphae, with the eventual collapse of roots and stems (for review, see Keijer, 1996). Keijer (1996) also proposes that this nonspecific cell damage preceding hyphal colonization may be one of the reasons why host resistance is typically only observed as an incremental reduction in disease severity.…”

mentioning

confidence: 99%

“…Colonization of the host is commonly characterized by cell wall degradation, plasmolysis, and cell death in advance of the hyphae, with the eventual collapse of roots and stems (for review, see Keijer, 1996). Keijer (1996) also proposes that this nonspecific cell damage preceding hyphal colonization may be one of the reasons why host resistance is typically only observed as an incremental reduction in disease severity. Increased host resistance has previously been associated with increased production of inhibitors of R. solani pectin lyase, increased cuticle thickness, and the accumulation of phytoalexins (for review, see Keijer, 1996), although the molecular responses of host cells have been largely unexplored.…”

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confidence: 99%

The B-3 Ethylene Response Factor MtERF1-1 Mediates Resistance to a Subset of Root Pathogens inMedicago truncatulawithout Adversely Affecting Symbiosis with Rhizobia

et al. 2010

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The fungal necrotrophic pathogen Rhizoctonia solani is a significant constraint to a range of crops as diverse as cereals, canola, and legumes. Despite wide-ranging germplasm screens in many of these crops, no strong genetic resistance has been identified, suggesting that alternative strategies to improve resistance are required. In this study, we characterize moderate resistance to R. solani anastomosis group 8 identified in Medicago truncatula. The activity of the ethylene-and jasmonateresponsive GCC box promoter element was associated with moderate resistance, as was the induction of the B-3 subgroup of ethylene response transcription factors (ERFs). Genes of the B-1 subgroup showed no significant response to R. solani infection. Overexpression of a B-3 ERF, MtERF1-1, in Medicago roots increased resistance to R. solani as well as an oomycete root pathogen, Phytophthora medicaginis, but not root knot nematode. These results indicate that targeting specific regulators of ethylene defense may enhance resistance to an important subset of root pathogens. We also demonstrate that overexpression of MtERF1-1 enhances disease resistance without apparent impact on nodulation in the A17 background, while overexpression in sickle reduced the hypernodulation phenotype. This suggests that under normal regulation of nodulation, enhanced resistance to root diseases can be uncoupled from symbiotic plant-microbe interactions in the same tissue and that ethylene/ERF regulation of nodule number is distinct from the defenses regulated by B-3 ERFs. Furthermore, unlike the stunted phenotype previously described for Arabidopsis (Arabidopsis thaliana) ubiquitously overexpressing B-3 ERFs, overexpression of MtERF1-1 in M. truncatula roots did not show adverse effects on plant development.

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The Initial Steps of the Infection Process in Rhizoctonia Solani

Cited by 44 publications

References 34 publications

Metabolite profiling of sheath blight disease resistance in rice: in the case of positive ion mode analysis by CE/TOF-MS

Metabolite profiling of sheath blight disease resistance in rice: in the case of positive ion mode analysis by CE/TOF-MS

Interactions between cauliflower and Rhizoctonia anastomosis groups with different levels of pathogenicity

The B-3 Ethylene Response Factor MtERF1-1 Mediates Resistance to a Subset of Root Pathogens inMedicago truncatulawithout Adversely Affecting Symbiosis with Rhizobia

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