Soil physics, fungal epidemiology and the spread of Rhizoctonia solani

Wilfred Otten, Darroch Hall, Kirsty Harris, Karl Ritz, Iain M. Young, Christopher A. Gilligan

Research output: Contribution to journalArticle

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Abstract

• The role of soil structure on colonization efficiency of the pathogen Rhizoctonia solani is analysed by linking experimental techniques that control and quantify soil structure with epidemiological concepts that deal with the fungal dynamics of colonization.
• The dynamics of colonization efficiency are quantified for the fungal colony spreading through replicated samples of a nonsterile sandy loam with different physical properties. The effect of bulk-density and aggregate-size on the air-filled pore volume is assessed by examination of thin soil sections and by quantification of pore-size distributions estimated from water-retention characteristics.
• An increase in bulk-density and a reduction in aggregate size increased the fraction of micropores in the air-filled pore volume at the expense of larger pores. These changes resulted in smaller, more slowly expanding fungal colonies and significantly reduced the volume of soil from which a nutrient source can become colonized.
• It is concluded that colonization efficiency is a convenient way to summarize the complicated dynamics of mycelial growth through soil. We use the results to discuss the effect of soil structure on the saprotrophic and parasitic invasion of soil by fungi.
Original languageEnglish
Pages (from-to)459-468
Number of pages10
JournalNew Phytologist
Volume151
Issue number2
DOIs
StatePublished - Aug 2001

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soil
Rhizoctonia
Physics
Epidemiology
Soil
soil structure
Thanatephorus cucumeris
bulk density
air
Air
soil physics
micropores
epidemiology
physical properties
fungi
pathogens
nutrients
water
sampling
methodology

Cite this

Otten, W., Hall, D., Harris, K., Ritz, K., Young, I. M., & Gilligan, C. A. (2001). Soil physics, fungal epidemiology and the spread of Rhizoctonia solani. New Phytologist, 151(2), 459-468. DOI: 10.1046/j.0028-646x.2001.00190.x

Otten, Wilfred; Hall, Darroch; Harris, Kirsty; Ritz, Karl; Young, Iain M.; Gilligan, Christopher A. / Soil physics, fungal epidemiology and the spread of Rhizoctonia solani.

In: New Phytologist, Vol. 151, No. 2, 08.2001, p. 459-468.

Research output: Contribution to journalArticle

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abstract = "• The role of soil structure on colonization efficiency of the pathogen Rhizoctonia solani is analysed by linking experimental techniques that control and quantify soil structure with epidemiological concepts that deal with the fungal dynamics of colonization.• The dynamics of colonization efficiency are quantified for the fungal colony spreading through replicated samples of a nonsterile sandy loam with different physical properties. The effect of bulk-density and aggregate-size on the air-filled pore volume is assessed by examination of thin soil sections and by quantification of pore-size distributions estimated from water-retention characteristics.• An increase in bulk-density and a reduction in aggregate size increased the fraction of micropores in the air-filled pore volume at the expense of larger pores. These changes resulted in smaller, more slowly expanding fungal colonies and significantly reduced the volume of soil from which a nutrient source can become colonized.• It is concluded that colonization efficiency is a convenient way to summarize the complicated dynamics of mycelial growth through soil. We use the results to discuss the effect of soil structure on the saprotrophic and parasitic invasion of soil by fungi.",
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Otten, W, Hall, D, Harris, K, Ritz, K, Young, IM & Gilligan, CA 2001, 'Soil physics, fungal epidemiology and the spread of Rhizoctonia solani' New Phytologist, vol 151, no. 2, pp. 459-468. DOI: 10.1046/j.0028-646x.2001.00190.x

Soil physics, fungal epidemiology and the spread of Rhizoctonia solani. / Otten, Wilfred; Hall, Darroch; Harris, Kirsty; Ritz, Karl; Young, Iain M.; Gilligan, Christopher A.

In: New Phytologist, Vol. 151, No. 2, 08.2001, p. 459-468.

Research output: Contribution to journalArticle

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AU - Otten,Wilfred

AU - Hall,Darroch

AU - Harris,Kirsty

AU - Ritz,Karl

AU - Young,Iain M.

AU - Gilligan,Christopher A.

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Otten W, Hall D, Harris K, Ritz K, Young IM, Gilligan CA. Soil physics, fungal epidemiology and the spread of Rhizoctonia solani. New Phytologist. 2001 Aug;151(2):459-468. Available from, DOI: 10.1046/j.0028-646x.2001.00190.x