Wheat blast: Aggressiveness of isolates of Pyricularia oryzae and effect on grain quality

Martínez, Sergio Iván Navarro; Sanabria, Analía; Fleitas, María Constanza; Consolo, Verónica Fabiana; Perelló, A. E.

doi:10.1016/j.jksus.2018.05.003

Cited by 21 publications

(21 citation statements)

References 17 publications

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“…Crude protein was determined using the micro-Kjeldahl method. The percentage of crude protein in the sample was calculated as: Nitrogen as % crude protein = % N × F, where N is nitrogen and F (conversion factor) is equivalent to 5.7 (Martínez et al, 2019).…”

Section: Crude Protein Percentagementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

“…To date, there is scant information available to describe the nutritional and biochemical changes occurring in wheat grains during MoT infection (Urashima et al, 2009;Miranda et al, 2015;Martínez et al, 2019). Infection of wheat grains by the notorious MoT pathogen may change the metabolic processes, reduce grain productivity, and also reduce the beneficial dietary contents (Urashima et al, 2009;Martínez et al, 2019). However, to fill the knowledge gaps, the present study was undertaken to: (i) evaluate physical, physiological properties, and mineral contents in grains affected by varying levels of blast disease infestation and (ii) analyze biochemical properties, nutritional contents, and antioxidant activities in varying levels of wheat blast damaged grains.…”

Section: Introductionmentioning

confidence: 99%

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Modulation of Nutritional and Biochemical Properties of Wheat Grains Infected by Blast Fungus Magnaporthe oryzae Triticum Pathotype

et al. 2020

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Wheat blast disease caused by the Magnaporthe oryzae Triticum (MoT) pathotype exerts a significant impact on grain development, yield, and quality of the wheat. The aim of this study was to investigate morphological, physiological, biochemical, and nutritional properties of wheat cv. BARI Gom 24 under varying levels of blast disease severity in wheat spikes. Grain morphology, volume, weight, and germination of the infected grains were significantly affected by MoT. Biochemical traits specifically grain N, Ca, Mg, and Fe content significantly increased (up to threefold; p > 0.05), but organic carbon, Cu, Zn, B, and S content in wheat grains significantly decreased with increased severity of MoT infection. The grain crude protein content was about twofold higher (up to 18.5% in grain) in severely blast-infected grains compared to the uninfected wheat (9.7%). Analysis of other nutritional properties such as secondary metabolites revealed that total antioxidant activity, flavonoid, and carotenoid concentrations remarkably decreased (up to threefold) with increasing severity of blast infestation in wheat grain. Grain moisture, lipid, and ash content were slightly increased with the increase in blast severity. However, grain K and total phenolic concentration were increased at a certain level of blast infestation and then reduced with increase in MoT infestation.

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Section: Crude Protein Percentagementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Modulation of Nutritional and Biochemical Properties of Wheat Grains Infected by Blast Fungus Magnaporthe oryzae Triticum Pathotype

et al. 2020

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“…The most severe and even most apparent indication for wheat blast disease in fields are spike infections which, in extreme cases, can lead to complete bleaching of a spike (Cruz and Valent 2017). Because seedling resistance on leaves and adult plant resistance on spikes are not strictly correlated (Martínez et al 2019), an investigation of both plant stages and organs is necessary. Under laboratory conditions, experiments with wheat spikes are difficult to conduct because of the long time needed between sowing and flowering and the growing space needed for large wheat plants at the adult stage.…”

Section: Ef1αmentioning

confidence: 99%

“…Most severely, spike infection may also affect the rachis resulting in obstruction of regular grain filling. A low negative correlation between seedling resistance on leaves and adult plant resistance on spikes was reported (Martínez et al 2019). As mentioned above, the disease can be transmitted by infected seeds, impacting global quarantine measures.…”

Section: Introductionmentioning

confidence: 99%

Wheat blast caused by Magnaporthe oryzae pathovar Triticum is efficiently controlled by the plant defence inducer isotianil

et al. 2020

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Wheat blast caused by Magnaporthe oryzae pv. Triticum is an upcoming threat to wheat cultivation worldwide. The disease crossing over to wheat first gained attention in South America, with increasing interest coming from its more recent appearance in the big wheat-growing areas of Asia. The increasing economic relevance of the disease and the lack of genetic resistance in current wheat breeding material, besides fungicide resistance already present in fungal pathogen populations, highlighted the need to evaluate the potential of isotianil as an alternative plant protection measure. Isotianil is already registered in Asia for the protection of rice against M. oryzae, but because the agronomic practices and disease development of blast differ between rice and wheat, the efficacy of isotianil against wheat blast was hard to predict. Testing isotianil in the currently available formulations, applied either as seed treatment or soil drench, resulted in a significant reduction of disease severity. The efficacy was comparably high, on different wheat cultivars and using several fungal isolates with different degrees of virulence. Microscopic analyses revealed that isotianil treatment can prevent invasive growth of the pathogen. No phytotoxicity from isotianil treatment was observed on wheat plants. Importantly, isotianil not only protects wheat plants at the seedling stage but also on spikes thereby preventing losses due to this most severe disease syndrome. In summary, the results showed the high potential of isotianil to protect against wheat blast.

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Wheat Blast: A Biosecurity Threat Looming Large

Bishnoi

Kumar

Singh

et al. 2022

New Horizons in Wheat and Barley Research

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Wheat blast: Aggressiveness of isolates of Pyricularia oryzae and effect on grain quality

Cited by 21 publications

References 17 publications

Modulation of Nutritional and Biochemical Properties of Wheat Grains Infected by Blast Fungus Magnaporthe oryzae Triticum Pathotype

Modulation of Nutritional and Biochemical Properties of Wheat Grains Infected by Blast Fungus Magnaporthe oryzae Triticum Pathotype

Wheat blast caused by Magnaporthe oryzae pathovar Triticum is efficiently controlled by the plant defence inducer isotianil

Wheat Blast: A Biosecurity Threat Looming Large

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