Vegetative Vigor of the Host as a Factor Influencing Susceptibility and Resistance to Certain Rust Diseases of the Higher Plants

Raines, Morris Abel

doi:10.1002/j.1537-2197.1922.tb05667.x

Cited by 8 publications

(4 citation statements)

References 24 publications

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“…It is generally agreed that vigor of an organism and its susceptibility to disease are antithetic variables, meaning that one increases as the other diminishes, and also that cultural practices aiming at improving the vigor of the plant often help increase its tolerance to pathogens (Agrios 2005;Raines 1922). This is in agreement with our results because, in general, we observed longest lesions in low vigor cultivars although, in the particular case of the laboratory experiment, this was depending on the inoculated isolate.…”

Section: Discussionmentioning

confidence: 99%

Susceptibility of Almond (Prunus dulcis) Cultivars to Twig Canker and Shoot Blight Caused byDiaporthe amygdali

et al. 2022

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Twenty-five almond cultivars were assessed for susceptibility to Diaporthe amygdali, causal agent of twig canker and shoot blight disease. In laboratory experiments, growing twigs were inoculated with four D. amygdali isolates. Moreover, growing shoots of almond cultivars grafted onto INRA ‘GF-677’ rootstock were used in four-year field inoculations with one D. amygdali isolate. In both type of experiments, inoculum consisted of agar plugs with mycelium, which were inserted underneath the bark and the lesion lengths caused by the fungus were measured. Necrotic lesions were observed in the inoculated almond cultivars both in laboratory and field tests, confirming the susceptibility of all the evaluated cultivars to all the inoculated isolates of D. amygdali. Cultivars were grouped as susceptible or very susceptible according to a cluster analysis. The relationship between some agronomic traits and cultivar susceptibility was also investigated. Blooming and ripening times were found relevant variables to explain cultivars performance related to D. amygdali susceptibility. Late and very late blooming, and early and medium ripening cultivars were highly susceptible to D. amygdali. Our results may provide valuable information that could assist in ongoing breeding programs of this crop and additionally in the selection of cultivars for new almond plantations.

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Section: Discussionmentioning

confidence: 99%

Susceptibility of Almond (Prunus dulcis) Cultivars to Twig Canker and Shoot Blight Caused byDiaporthe amygdali

et al. 2022

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“…Shading practices may help to supress or inversely may enhance the aerial dispersal of this pathogen depending on the rainfall regime. Pioneer studies on rust showed that the vegetative vigor of cereals reduced disease incidence ( Raines, 1922 ). A preliminary study on coffee demonstrated that high productivity is positively correlated with the incidence of rust.…”

Section: Introductionmentioning

confidence: 99%

Influence of Environmental Conditions and Genetic Background of Arabica Coffee (C. arabica L) on Leaf Rust (Hemileia vastatrix) Pathogenesis

et al. 2017

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Global warming is a major threat to agriculture worldwide. Between 2008 and 2013, some coffee producing countries in South and Central America suffered from severe epidemics of coffee leaf rust (CLR), resulting in high economic losses with social implications for coffee growers. The climatic events not only favored the development of the pathogen but also affected the physiological status of the coffee plant. The main objectives of the study were to evaluate how the physiological status of the coffee plant modified by different environmental conditions impact on the pathogenesis of CLR and to identify indicators of the physiological status able to predict rust incidence. Three rust susceptible genotypes (one inbred line and two hybrids) were grown in controlled conditions with a combination of thermal regime (TR), nitrogen and light intensity close to the field situation before being inoculated with the rust fungus Hemileia vastatrix. It has been demonstrated that a TR of 27-22°C resulted in 2000 times higher sporulation than with a TR of 23–18°C. It has been also shown that high light intensity combined with low nitrogen fertilization modified the CLR pathogenesis resulting in huge sporulation. CLR sporulation was significantly lower in the F1 hybrids than in the inbred line. The hybrid vigor may have reduced disease incidence. Among the many parameters studied, parameters related to photosystem II and photosynthetic electron transport chain components appeared as indicators of the physiological status of the coffee plant able to predict rust sporulation intensity. Taken together, these results show that CLR sporulation not only depends on the TR but also on the physiological status of the coffee plant, which itself depends on agronomic conditions. Our work suggests that vigorous varieties combined with a shaded system and appropriate nitrogen fertilization should be part of an agro-ecological approach to disease control.

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“…Raine ( 17) found increased susceptibility of wheat to rusts when grown under an excess of nitrogenous fertilizers. This was believed caused by indirect effects of fertilizers in increasing density of stand and lengthening period of exposure to infection.…”

Section: Agrostismentioning

confidence: 99%

Effects of Nitrogen Level and Osmotic Pressure of the Nutrient Solution on Incidence of Puccinia graminis and Helminthosporium sativum Infection in Merion Kentucky Bluegrass¹

Cheesman¹,

Roberts²,

Tiffany

1965

Agronomy Journal

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Synopsis Merion bluegrass grown in solution culture produced lower yields of foliage under low levels of nitrogen and high levels of osmotic pressure than when treated with high nitrogen and low osmotic pressures. Turf was resistant to inoculation with Puccinia graminis Pers. at all treatment combinations. Numbers of Helminthosporium sativum Pammel, King, and Bakke lesions per leaf blade and average size of lesions increased with increasing levels of nitrogen and decreasing osmotic pressure.

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Vegetative Vigor of the Host as a Factor Influencing Susceptibility and Resistance to Certain Rust Diseases of the Higher Plants

Cited by 8 publications

References 24 publications

Susceptibility of Almond (Prunus dulcis) Cultivars to Twig Canker and Shoot Blight Caused byDiaporthe amygdali

Susceptibility of Almond (Prunus dulcis) Cultivars to Twig Canker and Shoot Blight Caused byDiaporthe amygdali

Influence of Environmental Conditions and Genetic Background of Arabica Coffee (C. arabica L) on Leaf Rust (Hemileia vastatrix) Pathogenesis

Effects of Nitrogen Level and Osmotic Pressure of the Nutrient Solution on Incidence of Puccinia graminis and Helminthosporium sativum Infection in Merion Kentucky Bluegrass¹

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Vegetative Vigor of the Host as a Factor Influencing Susceptibility and Resistance to Certain Rust Diseases of the Higher Plants

Cited by 8 publications

References 24 publications

Susceptibility of Almond (Prunus dulcis) Cultivars to Twig Canker and Shoot Blight Caused byDiaporthe amygdali

Susceptibility of Almond (Prunus dulcis) Cultivars to Twig Canker and Shoot Blight Caused byDiaporthe amygdali

Influence of Environmental Conditions and Genetic Background of Arabica Coffee (C. arabica L) on Leaf Rust (Hemileia vastatrix) Pathogenesis

Effects of Nitrogen Level and Osmotic Pressure of the Nutrient Solution on Incidence of Puccinia graminis and Helminthosporium sativum Infection in Merion Kentucky Bluegrass1

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Effects of Nitrogen Level and Osmotic Pressure of the Nutrient Solution on Incidence of Puccinia graminis and Helminthosporium sativum Infection in Merion Kentucky Bluegrass¹