Spatial distribution of Yellow Sigatoka Leaf Spot correlated with soil fertility and plant nutrition

Freitas, Aurivan Soares de; Pozza, Edson Ampélio; Alves, Marcelo de Carvalho; Coelho, Gilberto; Rocha, H. S.; Pozza, Adélia Aziz Alexandre

doi:10.1007/s11119-015-9409-6

Cited by 24 publications

(12 citation statements)

References 27 publications

(19 reference statements)

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“…Sulfur enhances defenses against plant disease through the formation of sulfur-containing defense compounds (SDCs)1113, and an increased sulfur supply increases the disease resistance of plants to pathogens7161718. Interestingly, the expression levels of genes related to sulfate uptake (high-affinity sulfate transporter) and assimilation and the formation of SDCs were all up-regulated in tomatoes grown with potato onion plants (Table 1), thus suggesting that sulfur-enhanced defense might play an important role in the enhanced resistance of tomatoes to V. dahliae, as described by Rausch and Wachter11.…”

Section: Discussionmentioning

confidence: 99%

“…An increased sulfur supply increases the disease resistance of plants to pathogens and limits the spread of pathogens in plants, hence alleviating disease incidence and severity, whereas sulfur deficiency increases the susceptibility of plants to pathogens7161718. Thus, determining whether tomato/potato onion companion cropping may increase the availability of sulfur in the soil would be valuable for controlling tomato verticillium wilt.…”

mentioning

confidence: 99%

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Physiological response and sulfur metabolism of the V. dahliae-infected tomato plants in tomato/potato onion companion cropping

Zhou

et al. 2016

Sci Rep

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Companion cropping with potato onions (Allium cepa var. agrogatum Don.) can enhance the disease resistance of tomato plants (Solanum lycopersicum) to Verticillium dahliae infection by increasing the expressions of genes related to disease resistance. However, it is not clear how tomato plants physiologically respond to V. dahliae infection and what roles sulfur plays in the disease-resistance. Pot experiments were performed to examine changes in the physiology and sulfur metabolism of tomato roots infected by V. dahliae under the companion cropping (tomato/potato onion). The results showed that the companion cropping increased the content of total phenol, lignin and glutathione and increased the activities of peroxidase, polyphenol oxidase and phenylalanine ammonia lyase in the roots of tomato plants. RNA-seq analysis showed that the expressions of genes involved in sulfur uptake and assimilation, and the formation of sulfur-containing defense compounds (SDCs) were up-regulated in the V. dahlia-infected tomatoes in the companion cropping. In addition, the interactions among tomato, potato onion and V. dahliae induced the expression of the high- affinity sulfate transporter gene in the tomato roots. These results suggest that sulfur may play important roles in tomato disease resistance against V. dahliae.

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Section: Discussionmentioning

confidence: 99%

mentioning

confidence: 99%

Physiological response and sulfur metabolism of the V. dahliae-infected tomato plants in tomato/potato onion companion cropping

Zhou

et al. 2016

Sci Rep

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“…This model was used for variographic representation and for plotted kriging maps. This model, adjusted with REML method (restricted maximum likelihood), had already been used to characterize the spatial structure of diseases of coffee trees (4,28) and other cultures (3,16,25,31,32,40,41). This is related to the pathogen inoculum distribution generally in all directions, from the initial inoculum source.…”

Section: Assessment Of Spatial Dependencementioning

confidence: 99%

Geostatistical analysis of bacterial blight in coffee tree seedlings in the nursery

et al. 2018

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In nurseries of coffee tree seedlings (Coffea arabica), there are favorable conditions for bacterial blight epidemics (Pseudomonas syringae pv. garcae). Studying the spatial distribution of diseased plants can help in the adoption of management strategies. Likewise, geostatistics has been applied to shape the spatial distribution and study epidemiological aspects of plant diseases. Thus, this study was developed to characterize the spatial distribution pattern of bacterial blight in a nursery of coffee tree seedlings. The disease progress was monitored over time in 704 seedlings organized in lines and columns in a nursery. Considering the mean diameter of the pots used for producing seedlings, georeferencing was carried out in Cartesian coordinate system for the seedlings in the nursery. The disease incidence data were subjected to non-spatial exploratory analysis and geostatistical analysis. The spherical isotropic semivariogram model was adjusted to the data and data interpolation was performed by ordinary kriging to visualize the spatial distribution of symptomatic seedlings. Bacterial blight epidemic was detected in the nursery during the experimental period, and there was variability and spatial dependence in relation to the distribution of diseased seedlings. As the epidemic progressed, the population of diseased plants increased, as well as the number and the size of the foci and their coalescence. Besides, there was an increase in the range value, sill and nugget effect. The kriging maps showed the disease progress and its variance. The bacterial blight epidemic of coffee tree started with a random spatial distribution pattern, progressing to an aggregate pattern.

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“…In the case of banana plants, the intensity of Yellow Sigatoka was higher in plants grown in K-deficient nutrient solution (Freitas et al, 2015b), and lower in plants grown in soil with higher contents of Ca (Freitas et al, 2015a;Gerald et al, 2003).…”

Section: Introductionmentioning

confidence: 83%

Interaction between potassium (K) and calcium (Ca) on the severity of Yellow Sigatoka in banana plants

Freitas¹,

Pozza²,

Pozza³

et al. 2017

Afr. J. Agric. Res.

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The main control measure of Yellow Sigatoka (Pseudocercospora musae) in banana plants (Musa spp.) has been the planting of resistant varieties, and fungicide application. However, the use of adequately nourished plants is also emphasized as a complementary control method. This study evaluated the influence of interaction between potassium (K) and calcium (Ca) in nutrient solution on the severity of Yellow Sigatoka in banana. Evaluation included severity of disease, chlorophyll a and b contents, nutrient contents, and total dry weight (TDW). There was no interaction between concentrations of K and Ca for area under the disease severity progress curve (AUDSPC), although the AUDSPC increased in leaves 1 and 2 with increasing concentrations of K from 1 to 6 mmol L -1 . Increasing K led to a reduction in chlorophyll a and b contents, and in nutrients N, P, Mg, B, Cu, Zn, and Mn. TDW increased with increasing K. Therefore, high concentration of K causes nutritional imbalance in banana plants, and favors the severity of Yellow Sigatoka.

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Spatial distribution of Yellow Sigatoka Leaf Spot correlated with soil fertility and plant nutrition

Cited by 24 publications

References 27 publications

Physiological response and sulfur metabolism of the V. dahliae-infected tomato plants in tomato/potato onion companion cropping

Physiological response and sulfur metabolism of the V. dahliae-infected tomato plants in tomato/potato onion companion cropping

Geostatistical analysis of bacterial blight in coffee tree seedlings in the nursery

Interaction between potassium (K) and calcium (Ca) on the severity of Yellow Sigatoka in banana plants

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