Presence of both mating types of Ascochyta rabiei in Argentina suggests potential for sexual reproduction

Crociara, Clara Sonia; Valetti, Lucio; Pastor, Silvina Estela

doi:10.1007/s13314-020-00411-x

Cited by 3 publications

(9 citation statements)

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“…In a work recently published by our research group, the presence of both mating types was analysed by multiplex-PCR in the 12 isolates obtained from different sites of Córdoba province (Crociara et al, 2020). In that work, we reported that nine of the isolates were MAT1-1 idiomorph and three were MAT1-2 idiomorph.…”

Section: In Vitro Crosses Of Opposite Mating Typesmentioning

confidence: 98%

“…Plant tissue segments (10-mm long) and/or seeds were surface sterilized with ethanol 70% (30 s) and sodium hypochlorite 0.2% (2 min), and washed three to four times with sterile water. Each piece was then placed in Petri dishes containing sterile water agar supplemented with streptomycin (150 ml/L) and incubated at 21°C, under a 12/12 h fluorescent light/ dark cycle (Valetti et al, 2020). After 7 days, Petri dishes were visually examined for the presence of the typical structures described for A. rabiei: pycnidia, cirrus and conidia (Chen et al, 2011;Harveson et al, 2011).…”

Section: Pathogen Isolationmentioning

confidence: 99%

“…Subsequently, its occurrence was confirmed in several countries, including the United States, Spain and Syria (Barve et al, 2003). Although structures of the sexual stage have still not been found in Argentina, the presence of both mating types has been recently reported (Crociara et al, 2020). This information is crucial since sexual reproduction provides plasticity to overcome fungicides or host resistance through new genetic variants (Crociara et al, 2020;Rani et al, 2020).…”

mentioning

confidence: 99%

“…Although structures of the sexual stage have still not been found in Argentina, the presence of both mating types has been recently reported (Crociara et al, 2020). This information is crucial since sexual reproduction provides plasticity to overcome fungicides or host resistance through new genetic variants (Crociara et al, 2020;Rani et al, 2020). In this sense, an increase in pathogen resistance to some fungicides, such as strobilurin, has been recently reported in chickpea growing areas (Kabakci & Özer, 2021).…”

mentioning

confidence: 99%

“…This is the first report in Latin America, contributing to a better understanding of the pathosystem not only regionally but also globally. This thorough characterization of the pathogen is also necessary for chickpea breeding programmes aimed at obtaining long-lasting resistance (Valetti et al, 2020).…”

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confidence: 99%

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Morphological and molecular characterization, pathogenicity and sexual reproduction of Ascochyta rabiei isolates of chickpea fields in Argentina

Crociara

Valetti

Lima

et al. 2022

Journal of Phytopathology

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Chickpea (Cicer arietinum L.) is the third most important grain legume in the world, with an annual global production of about 17.22 million tonnes (Kabaci & Özer, 2021). Argentina is one of the main chickpea producers in South America, and is among the main exporters along with Canada and Australia . In particular, Córdoba province contributes 50% of the exports from Argentina (Farias, 2018). In this area, production is dominated by Kabuli varieties, such as Chañaritos S-156 (Criadero Alpa Sumaj FCA-UNC, register number 2392), the first cultivar registered for cultivation in the country. Ascochyta blight (AB) of chickpea, caused by the Ascomycete fungus Ascochyta rabiei (Pass.) Labr. [teleomorph: Didymella rabiei (Kovacheski) von Arx (synonym: Mycosphaerella rabiei Kovacheski), is one of the most devastating foliar diseases of chickpea worldwide. The disease occurs in regions with cool and humid weather during the crop season (15-25°C; Pande et al., 2005; Rani et al., 2020).Several epidemics around the world resulted in 100% yield losses

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Section: In Vitro Crosses Of Opposite Mating Typesmentioning

confidence: 98%

Section: Pathogen Isolationmentioning

confidence: 99%

mentioning

confidence: 99%

mentioning

confidence: 99%

mentioning

confidence: 99%

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Morphological and molecular characterization, pathogenicity and sexual reproduction of Ascochyta rabiei isolates of chickpea fields in Argentina

Crociara

Valetti

Lima

et al. 2022

Journal of Phytopathology

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Screening of chickpea germplasm for Ascochyta blight resistance under controlled environment

et al. 2022

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Ascochyta rabiei: A threat to global chickpea production

Singh

Kumar

Purayannur

et al. 2022

Molecular Plant Pathology

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The necrotrophic fungus Ascochyta rabiei causes Ascochyta blight (AB) disease in chickpea. A. rabiei infects all aerial parts of the plant, which results in severe yield loss. At present, AB disease occurs in most chickpea‐growing countries. Globally increased incidences of A. rabiei infection and the emergence of new aggressive isolates directed the interest of researchers toward understanding the evolution of pathogenic determinants in this fungus. In this review, we summarize the molecular and genetic studies of the pathogen along with approaches that are helping in combating the disease. Possible areas of future research are also suggested. Taxonomy kingdom Mycota, phylum Ascomycota, class Dothideomycetes, subclass Coelomycetes, order Pleosporales, family Didymellaceae, genus Ascochyta , species rabiei. Primary host A. rabiei survives primarily on Cicer species. Disease symptoms A. rabiei infects aboveground parts of the plant including leaves, petioles, stems, pods, and seeds. The disease symptoms first appear as watersoaked lesions on the leaves and stems, which turn brown or dark brown. Early symptoms include small circular necrotic lesions visible on the leaves and oval brown lesions on the stem. At later stages of infection, the lesions may girdle the stem and the region above the girdle falls off. The disease severity increases at the reproductive stage and rounded lesions with concentric rings, due to asexual structures called pycnidia, appear on leaves, stems, and pods. The infected pod becomes blighted and often results in shrivelled and infected seeds. Disease management strategies Crop failures may be avoided by judicious practices of integrated disease management based on the use of resistant or tolerant cultivars and growing chickpea in areas where conditions are least favourable for AB disease development. Use of healthy seeds free of A. rabiei , seed treatments with fungicides, and proper destruction of diseased stubbles can also reduce the fungal inoculum load. Crop rotation with nonhost crops is critical for controlling the disease. Planting moderately resistant cultivars and prudent application of fungicides is also a way to combat AB disease. However, the scarcity of AB‐resistant accessions and the continuous evolution of the pathogen challenges the disease management process. Useful websites https://www.ndsu.edu/pubweb/pulse‐info/resourcespdf/Ascochyta%20blight%20of%20chickpea.pdf https://saskpulse.com/files/newsletters/180531_ascochyta_in_chickpeas‐compressed.pdf http://www.pulseaus.com.au/growing‐pulses/bmp/chickpea/ascochyta‐blight http://agriculture.vic.gov.au/agriculture/pests‐diseases...

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Presence of both mating types of Ascochyta rabiei in Argentina suggests potential for sexual reproduction

Cited by 3 publications

References 12 publications

Morphological and molecular characterization, pathogenicity and sexual reproduction of Ascochyta rabiei isolates of chickpea fields in Argentina

Morphological and molecular characterization, pathogenicity and sexual reproduction of Ascochyta rabiei isolates of chickpea fields in Argentina

Screening of chickpea germplasm for Ascochyta blight resistance under controlled environment

Ascochyta rabiei: A threat to global chickpea production

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