Glasshouse Studies on Ophiobolus graminis as a Cause of Whiteheads in Wheat

Chambers, S C

doi:10.1111/j.1439-0434.1971.tb03153.x

Cited by 7 publications

(2 citation statements)

References 2 publications

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“…Reduction of the root system's ability to supply the plant with adequate water and nutrients could be brought about by either a reduction in size of the root system, or a reduction in the efficiency of uptake. In support of the former, infection has been observed to stop root growth (Clarkson et al ., 1975), reduce seminal root dry weights (Asher, 1972), cause root death below the point of infection (Deacon & Henry, 1978) and reduce total root length (Chambers, 1971). However, there are indications that infected plants could compensate by the production of extra crown roots (Davis, 1925; Russell, 1931, 1934; Defosse, 1959), although this may be limited to early in the season (Asher, 1972; Bailey & Gilligan, 2004).…”

Section: Introductionmentioning

confidence: 99%

“…Increased availability may allow sufficient uptake to be maintained at lower RLDs, thus ameliorating the effects of take‐all. For instance, Chambers (1971) reported that infected plants had higher yields when grown in soil with 13% volumetric soil moisture content than in soil with 8%, even though they had similar lengths of root infected. However, increasing soil moisture has also been observed to promote take‐all infection (Cook & Papendick, 1972; Trolldenier, 1981; Murray et al ., 1991).…”

Section: Introductionmentioning

confidence: 99%

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Explaining variation in the effects of take‐all (Gaeumannomyces graminis var. tritici) on nitrogen and water uptake by winter wheat

Pillinger¹,

Paveley²,

Foulkes³

et al. 2005

Plant Pathology

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Two field experiments, in 1999 and 2000, were used to test whether reductions in root growth and function explained the effects of take-all on crop water and nitrogen uptake. The fungicide silthiofam was used to manipulate take-all independently of other factors. Soil water content was manipulated from heading to determine effects on disease progress and resource capture. Epidemic progress was significantly delayed in the presence of silthiofam, leading to reductions in disease in both experiments. Effects of silthiofam were reduced by increasing soil water late in the season, although only in 2000 did increased soil water content have a direct effect, leading to a higher rate of disease increase. Higher levels of disease in the absence of silthiofam did not affect root growth as measured by total root length density (TRLD), but did lead to significantly reduced healthy root length density (HRLD, a measure of functional roots) in both experiments. Only in 2000 were there any significant effects of increased take-all on water and nitrogen uptake. This was attributed to the higher TRLD in the (1999) crop, which allowed HRLDs to be maintained above a critical threshold (where water and nitrogen uptake start to be severely affected) despite loss of functional root to disease. The effects of take-all on nitrogen uptake were more likely to affect crop canopy size and duration than the relatively small effects observed on water uptake. Increasing soil water content allowed the crop to take up more water in absolute terms despite, in 2000, increasing levels of disease and reducing HRLD.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Explaining variation in the effects of take‐all (Gaeumannomyces graminis var. tritici) on nitrogen and water uptake by winter wheat

Pillinger¹,

Paveley²,

Foulkes³

et al. 2005

Plant Pathology

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Effects of shading and powdery mildew infection on senescence of the root cortex and coleoptile of wheat and barley seedlings, and implications for root- and foot-rot fungi

Lewis¹,

Deacon²

1982

Plant Soil

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Summary Nuclear and cytoplasmic staining methods were used to study natural senescence of the root cortex and coleoptile of wheat and barley seedlings grown in glasshouse conditions. Coleoptiles of barley senesced more slowly than those of wheat, paralleling the known difference in rates of root cortex senescence in these cereals. The coleoptiles and root cortices of both cereals senesced more slowly in shaded than in unshaded conditions, but infection of the shoots of barley by Erysiphe graminis had little effect on root cortex senescence.The results are discussed in relation to infection by root-and foot-rot fungi. Previous reports on the effects of illumination on take-all infection (Gaeumannomyces oraminis) are explained. It is suggested that natural senescence of the coleoptile might affect establishment of infection by the eyespot fungus, Pseudocercosporella herpotrichoides, either directly or through the activities of competing microorganisms.

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Effects of Nutrient Stress on Susceptibility of Plants to Disease with Particular Reference to the Trace Elements

Graham

1983

Advances in Botanical Research

186

102

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Glasshouse Studies on Ophiobolus graminis as a Cause of Whiteheads in Wheat

Cited by 7 publications

References 2 publications

Explaining variation in the effects of take‐all (Gaeumannomyces graminis var. tritici) on nitrogen and water uptake by winter wheat

Explaining variation in the effects of take‐all (Gaeumannomyces graminis var. tritici) on nitrogen and water uptake by winter wheat

Effects of shading and powdery mildew infection on senescence of the root cortex and coleoptile of wheat and barley seedlings, and implications for root- and foot-rot fungi

Effects of Nutrient Stress on Susceptibility of Plants to Disease with Particular Reference to the Trace Elements

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