Rhizoctonia Bare Patch of Cereals: An Australian Perspective.

MacNish, G. C.

doi:10.1094/pd-80-0965

Cited by 52 publications

(26 citation statements)

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“…R. solani is well known for causing rice sheath blight which is one of the most prevalent rice diseases [14]. Isolates of AG8 cause bare patch disease of cereals and legumes [15], and can cause severe root rot in canola [16]. R. solani AG8 patches were associated with up to 30% grain yield loss in the US [17] and $59 m in annual losses to wheat in Australia [18].…”

Section: Introductionmentioning

confidence: 99%

Genetic and Genomic Analysis of Rhizoctonia solani Interactions with Arabidopsis; Evidence of Resistance Mediated through NADPH Oxidases

et al. 2013

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Rhizoctonia solani is an important soil-borne necrotrophic fungal pathogen, with a broad host range and little effective resistance in crop plants. Arabidopsis is resistant to R. solani AG8 but susceptible to R. solani AG2-1. A screen of 36 Arabidopsis ecotypes and mutants affected in the auxin, camalexin, salicylic acid, abscisic acid and ethylene/jasmonic acid pathways did not reveal any variation in response to R. solani and demonstrated that resistance to AG8 was independent of these defense pathways. The Arabidopsis Affymetrix ATH1 Genome array was used to assess global gene expression changes in plants infected with AG8 and AG2-1 at seven days post-infection. While there was considerable overlap in the response, some gene families were differentially affected by AG8 or AG2-1 and included those involved in oxidative stress, cell wall associated proteins, transcription factors and heat shock protein genes. Since a substantial proportion of the gene expression changes were associated with oxidative stress responses, we analysed the role of NADPH oxidases in resistance. While single NADPH oxidase mutants had no effect, a NADPH oxidase double mutant atrbohf atrbohd resulted in an almost complete loss of resistance to AG8, suggesting that reactive oxidative species play an important role in Arabidopsis's resistance to R. solani.

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Section: Introductionmentioning

confidence: 99%

Genetic and Genomic Analysis of Rhizoctonia solani Interactions with Arabidopsis; Evidence of Resistance Mediated through NADPH Oxidases

et al. 2013

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“…Frontier in the repeat experiment with a score of 2.1). ZG1-5 and ZG1-4 (AG8) cause root rot/bare patch of cereals and legumes in Western Australia and South Australia (Neate and Warcup 1985;Rovira et al 1986;Sweetingham et al 1986;Neate et al 1988;MacNish and Sweetingham 1990;MacNish et al 1993;Roget 1995;MacNish and Neate 1996). It should be noted that the R. solani cereal strains were also highly pathogenic on all hosts tested in our study.…”

Section: Discussionmentioning

confidence: 61%

“…We found that ZG1-5 and ZG1-4 caused severe root rot on all genotypes tested. ZG1-5 and ZG1-4 are known to have wide host range and are among the most commonly isolated R. solani group associated with root rot/bare patch of cereals and legumes (Roberts and Sivasithamparam 1986;Sweetingham et al 1986;Neate et al 1988;Sweetingham 1990;MacNish et al 1993;Roget 1995;MacNish and Neate 1996;Schillinger and Paulitz 2006). AG8 strains are normally associated with bare-patch disease in the field and require specific soil conditions to express their pathogenicity (Gill et al 2000(Gill et al , 2001a(Gill et al , b, c, 2002.…”

Section: Discussionmentioning

confidence: 99%

Cross-pathogenicity of Rhizoctonia solani strains on pasture legumes in pasture-crop rotations

et al. 2007

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“…Onion stunting has only recently been observed in onions (Twigden 2005) although onions have been grown in the area for over 30 years and 'Rhizoctonia bare patch' of cereals has been reported in South Australia from the 1930's (MacNish and Neate 1996). Stubby-root nematode which is known to occur in the area (Stirling 1976) has been considered by some growers as the cause of stunting.…”

Section: Discussionmentioning

confidence: 99%

“…Light sandy calcareous soils with low organic matter predominate in this area which has been traditionally used for cereal production and grazing. Bare patch, a stunting disease of cereals which is associated with Rhizoctonia solani anastomosis group (AG) 8 is common in this area (MacNish and Neate 1996).…”

Section: Introductionmentioning

confidence: 99%

Onion stunting in South Australia associated with Rhizoctonia solani AG 8

Wicks

Walker

Pederick

et al. 2010

Australasian Plant Pathol.

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Patches of stunted onion plants are common within otherwise healthy crops in the "Mallee" region of South Australia. A number of fungi including species of Rhizoctonia, Fusarium, Pyrenochaeta and Pythium were isolated from the roots of stunted plants, but only R. solani anastomosis groups (AG) 2.1 and 8 consistently caused severe stunting when onion seedlings were grown in soil inoculated with these pathogens. High quantities of R. solani AG 8 DNA were associated with soil collected from stunted patches but the pathogen was generally low or absent in soil from healthy areas. DNA of AG 2.1 and 3 were common in onion field soil, but quantities were not correlated with stunted areas. AGs 2.2, 4 and 5 were rarely detected in onion field soil. Nematodes such as Pratylenchus, Paratylenchus, Paratrichodorus and Tylenchorhynchus were extracted from soil and/or onion roots but numbers were generally low and were similar in stunted and healthy areas. Overall these results suggest that onion stunting in South Australia is primarily associated with R. solani AG 8 although interactions with other fungi and/or nematodes may also be involved.

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Rhizoctonia Bare Patch of Cereals: An Australian Perspective.

Cited by 52 publications

References 0 publications

Genetic and Genomic Analysis of Rhizoctonia solani Interactions with Arabidopsis; Evidence of Resistance Mediated through NADPH Oxidases

Genetic and Genomic Analysis of Rhizoctonia solani Interactions with Arabidopsis; Evidence of Resistance Mediated through NADPH Oxidases

Cross-pathogenicity of Rhizoctonia solani strains on pasture legumes in pasture-crop rotations

Onion stunting in South Australia associated with Rhizoctonia solani AG 8

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