First report of triticale blast caused by the fungus<i>Magnaporthe oryzae</i>pathotype<i>Triticum</i>in Bangladesh

Roy, Krishna Kanta; Muzahid-E-Rahman,; Reza, Mostofa Ali; Mustarin, Kishowar E; Malaker, P. K.; Barma, N. C. D.; Hossain, Israil; He, Xinyao; Singh, Pawan K.

doi:10.1080/07060661.2020.1793223

Cited by 10 publications

(6 citation statements)

References 15 publications

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“…The aforementioned pathotypes are genetically close and interfertile and were distinct from the Digitaria isolates originally designated P. grisea (Urashima et al, 1993;Kato et al, 2000;Murakami et al, 2000;Tosa et al, 2004Tosa et al, , 2006, which was later confirmed with a multilocus phylogenetic analysis (Kato et al, 2000;Couch and Kohn, 2002). It is noteworthy that MoT attacks not only wheat but also its relative triticale, barley, and durum (Roy et al, 2020b(Roy et al, , 2021a. There is no cross infection that happened between rice and wheat blast isolates on either of the alternative host (Prabhu et al, 1992;Tosa et al, 2004).…”

Section: Pathogen Biologymentioning

confidence: 65%

“…Pieck et al (2017) have reported a polymerase chain reaction (PCR) assay based on MoT3 primer sets, and Yasuhara-Bell et al (2018) converted it to a loop-mediated isothermal amplification (LAMP) assay, enabling rapid detection of MoT in both laboratory and field conditions. The MoT3 marker was recently used to reveal that MoT causes blast on some other hosts such as triticale (Roy et al, 2020b), barley FIGURE 1 | Wheat blast symptoms on different parts of the plant. (A) initial symptoms of blast in wheat field in a patch, (B) infected field showing silvery bleached spikes with green canopy, (C) typical partial or full bleached spikes in field, (D) a partially bleached spike with multiple points of infection, (E) dark-gray sporulation of the fungus MoT on the rachis, (F) infected awns show brown to whitish discoloration, (G) infected glumes show elliptical lesions with white to brown center and dark gray margins, (H) severely shriveled or wrinkled blast affected vs. healthy grains of wheat, (I) typical eye-shaped lesions with gray or whitish centers surrounded by dark brown margins on seedling leaf, (J) a severely damaged seedling field affected by MoT infection, (K) typical eye-shaped or elliptical lesions on a mature leaf, and (L) elliptical or elongated lesions on blast-affected stem having white centers surrounded by brown or blackish margins.…”

Section: Symptoms and Diagnosis Of Wheat Blastmentioning

confidence: 99%

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Wheat Blast: A Disease Spreading by Intercontinental Jumps and Its Management Strategies

et al. 2021

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Wheat blast (WB) caused by Magnaporthe oryzae pathotype Triticum (MoT) is an important fungal disease in tropical and subtropical wheat production regions. The disease was initially identified in Brazil in 1985, and it subsequently spread to some major wheat-producing areas of the country as well as several South American countries such as Bolivia, Paraguay, and Argentina. In recent years, WB has been introduced to Bangladesh and Zambia via international wheat trade, threatening wheat production in South Asia and Southern Africa with the possible further spreading in these two continents. Resistance source is mostly limited to 2NS carriers, which are being eroded by newly emerged MoT isolates, demonstrating an urgent need for identification and utilization of non-2NS resistance sources. Fungicides are also being heavily relied on to manage WB that resulted in increasing fungal resistance, which should be addressed by utilization of new fungicides or rotating different fungicides. Additionally, quarantine measures, cultural practices, non-fungicidal chemical treatment, disease forecasting, biocontrol etc., are also effective components of integrated WB management, which could be used in combination with varietal resistance and fungicides to obtain reasonable management of this disease.

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Section: Pathogen Biologymentioning

confidence: 65%

Section: Symptoms and Diagnosis Of Wheat Blastmentioning

confidence: 99%

Wheat Blast: A Disease Spreading by Intercontinental Jumps and Its Management Strategies

et al. 2021

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“…Though initially it was assumed that WB is an event of host-shift of MoO from rice to wheat, recent molecular studies have confirmed that MoT from Bangladesh and South America have highly similar genetic content [ 74 ], and they are also distinct from other Magnaporthe pathotypes [ 75 , 76 , 77 , 78 ]. Interestingly, among the Magnaporthe pathotypes, only Triticum (MoT) infects other hosts than its main host, wheat [ 79 , 80 ]. These findings highlight the potential host-shift/jumping of Magnaporthe pathotypes and the associated threat to the crop production, specifically to cereals and millets.…”

Section: Molecular Interplay Between Rice and M Oryzaementioning

confidence: 99%

Understanding the Dynamics of Blast Resistance in Rice-Magnaporthe oryzae Interactions

Kumar

Jain

Solanke

et al. 2022

JoF

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Rice is a global food grain crop for more than one-third of the human population and a source for food and nutritional security. Rice production is subjected to various stresses; blast disease caused by Magnaporthe oryzae is one of the major biotic stresses that has the potential to destroy total crop under severe conditions. In the present review, we discuss the importance of rice and blast disease in the present and future global context, genomics and molecular biology of blast pathogen and rice, and the molecular interplay between rice–M. oryzae interaction governed by different gene interaction models. We also elaborated in detail on M. oryzae effector and Avr genes, and the role of noncoding RNAs in disease development. Further, rice blast resistance QTLs; resistance (R) genes; and alleles identified, cloned, and characterized are discussed. We also discuss the utilization of QTLs and R genes for blast resistance through conventional breeding and transgenic approaches. Finally, we review the demonstrated examples and potential applications of the latest genome-editing tools in understanding and managing blast disease in rice.

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“…Although the isolates from different hosts are genetically distinct, cross-infection does occur to some extent 4 , 13 . As M. oryzae Triticum isolate of wheat can infect barley, maize, triticale, durum wheat and swamp rice grass in the laboratory conditions, whereas M. oryzae Oryzae isolates of rice can cause disease in the wheat plants 5 , 14 , 15 . However, the virulence of these pathogens during cross-infection in field conditions has not yet been established.…”

Section: Introductionmentioning

confidence: 99%

Highly potent natural fungicides identified in silico against the cereal killer fungus Magnaporthe oryzae

Khan

Mahfuz

et al. 2022

Sci Rep

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Magnaporthe oryzae is one of the most notorious fungal pathogens that causes blast disease in cereals, and results in enormous loss of grain production. Many chemical fungicides are being used to control the pathogen but none of them are fully effective in controlling blast disease. Therefore, there is a demand for the discovery of a new natural biofungicide to manage the blast disease efficiently. A large number of new natural products showed inhibitory activities against M. oryzae in vitro. To find out effective biofungicides, we performed in silico molecular docking analysis of some of the potent natural compounds targeting four enzymes namely, scytalone dehydratase, SDH1 (PDB ID:1STD), trihydroxynaphthalene reductase, 3HNR (PDB ID:1YBV), trehalose-6-phosphate synthase, Tps1 (PDB ID:6JBI) and isocitrate lyase, ICL1 (PDB ID:5E9G) of M. oryzae fungus that regulate melanin biosynthesis and/or appresorium formation. Thirty-nine natural compounds that were previously reported to inhibit the growth of M. oryzae were subjected to rigid and flexible molecular docking against aforementioned enzymes followed by molecular dynamic simulation. The results of virtual screening showed that out of 39, eight compounds showed good binding energy with any one of the target enzymes as compared to reference commercial fungicides, azoxystrobin and strobilurin. Among the compounds, camptothecin, GKK1032A2 and chaetoviridin-A bind with more than one target enzymes of M. oryzae. All of the compounds except tricyclazole showed good bioactivity score. Taken together, our results suggest that all of the eight compounds have the potential to develop new fungicides, and remarkably, camptothecin, GKK1032A2 and chaetoviridin-A could act as multi-site mode of action fungicides against the blast fungus M. oryzae.

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First report of triticale blast caused by the fungusMagnaporthe oryzaepathotypeTriticumin Bangladesh

Cited by 10 publications

References 15 publications

Wheat Blast: A Disease Spreading by Intercontinental Jumps and Its Management Strategies

Wheat Blast: A Disease Spreading by Intercontinental Jumps and Its Management Strategies

Understanding the Dynamics of Blast Resistance in Rice-Magnaporthe oryzae Interactions

Highly potent natural fungicides identified in silico against the cereal killer fungus Magnaporthe oryzae

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