Characterization of New Small-Spored Alternaria Species Isolated from Solanaceae in Algeria

Bessadat, Nabahat; Hamon, Bruno; Bataillé‐Simoneau, Nelly; Kihal, Mebrouk; Simoneau, Philippe

doi:10.3390/life11121291

Cited by 10 publications

(10 citation statements)

References 56 publications

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“…Disease incidence (DI) was recorded as the number of infected leaves/the number of inoculated leaves × 100. The disease severity index (DSI) was evaluated using a 1–4 rating scale slightly modified from Uwaremwe et al (2021) and Bessadat et al (2021). The scores were 1 = no symptoms (0 < d ≤ 10 mm), 2 = mild symptoms (10 < d ≤ 20 mm), 3 = obvious lesions (20 < d ≤ 30 mm) and 4 = severe lesions (30 mm < d ), where d is the diameter of lesions on the leaves.…”

Section: Methodsmentioning

confidence: 99%

“…This disease can lead to complete defoliation in severe cases, resulting in significant yield loss (Chaerani & Voorrips, 2006; Peralta et al, 2005). Brown spot initially exhibits on leaves as dark‐brown lesions that never develop the dark concentric rings (Bessadat et al, 2021). Many Alternaria species have been documented to cause foliar diseases on potato, tomato and eggplant.…”

Section: Introductionmentioning

confidence: 99%

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Pathogenicity and diversity of large‐spored Alternaria associated with three solanaceous vegetables (Solanum tuberosum, S. lycopersicum and S. melongena) in China

et al. 2022

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Alternaria foliar diseases are important factors that pose a significant threat to yield in solanaceous crops. To clarify the diversity of large‐spored Alternaria species in China, diseased leaves of three solanaceous vegetables (potato, tomato and eggplant) were collected and used for fungal isolation. In total, 67 strains representing six species in section Porri of Alternaria were isolated, based on morphological characterizations and multilocus phylogenetic analyses. There were three known species (A. blumeae, A. linariae and A. solani), one new record of A. argyroxiphii and two new species, A. melongenicola sp. nov. and A. yichangensis sp. nov. The sequence analyses encompassed the internal transcribed spacer region of rDNA (ITS), glyceraldehyde‐3‐phosphate dehydrogenase (GAPDH), Alternaria major allergen (Alt a 1), translation elongation factor 1‐α (TEF1) and RNA polymerase second largest subunit (RPB2). To confirm pathogenicity, 15 representative strains were evaluated for their virulence under greenhouse conditions. The results revealed that they were able to induce leaf spot symptoms on potato, tomato and eggplant plants with a range of aggressive abilities. The present study provides a basis for the recognition and management of Alternaria foliar diseases.

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Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Pathogenicity and diversity of large‐spored Alternaria associated with three solanaceous vegetables (Solanum tuberosum, S. lycopersicum and S. melongena) in China

et al. 2022

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“…When using molecular barcode markers, a combination of several loci is necessary. The most commonly used markers are ITS, GAPDH, RPB2, TEF1 and Alt a 1 (e.g., Kokaeva et al, 2022;Woudenberg et al, 2014), and most studies with a multilocus phylogeny employ these five or subset of them, with or without additional, less common loci like endoPG, histone H3, calmodulin and OPA 10-2 (e.g., Adhikari et al, 2020;Bessadat et al, 2021;Ding et al, 2019;Woudenberg et al, 2015). Recently, Dettman et al developed (Dettman & Eggertson, 2021, 2022 and tested (Dettman et al, 2023) new markers to achieve better identification of small-spored Alternaria.…”

Section: Box 1 Identification Of Alternaria Speciesmentioning

confidence: 99%

Alternaria diseases on potato and tomato

Schmey,

Tominello‐Ramirez,

Brune

et al. 2024

Molecular Plant Pathology

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Alternaria spp. cause different diseases in potato and tomato crops. Early blight caused by Alternaria solani and brown spot caused by Alternaria alternata are most common, but the disease complex is far more diverse. We first provide an overview of the Alternaria species infecting the two host plants to alleviate some of the confusion that arises from the taxonomic rearrangements in this fungal genus. Highlighting the diversity of Alternaria fungi on both solanaceous hosts, we review studies investigating the genetic diversity and genomes, before we present recent advances from studies elucidating host–pathogen interactions and fungicide resistances.TaxonomyKingdom Fungi, Phylum Ascomycota, Class Dothideomycetes, Order Pleosporales, Family Pleosporaceae, Genus Alternaria.Biology and host rangeAlternaria spp. adopt diverse lifestyles. We specifically review Alternaria spp. that cause disease in the two solanaceous crops potato (Solanum tuberosum) and tomato (Solanum lycopersicum). They are necrotrophic pathogens with no known sexual stage, despite some signatures of recombination.Disease symptomsSymptoms of the early blight/brown spot disease complex include foliar lesions that first present as brown spots, depending on the species with characteristic concentric rings, which eventually lead to severe defoliation and considerable yield loss.ControlGood field hygiene can keep the disease pressure low. Some potato and tomato cultivars show differences in susceptibility, but there are no fully resistant varieties known. Therefore, the main control mechanism is treatment with fungicides.

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“…Porri comprising A. solani, A. blumeae, A. linariae, A. grandis and A. protenta infecting both potatoes and tomatoes [14,16]. Another type of Alternaria, small-spored Alternaria has been detected in a large number of the sampled leaves [17]. On potato, A. alternate (syn.…”

Section: Introductionmentioning

confidence: 99%

Four New Species of Small-Spored Alternaria Isolated from Solanum tuberosum and S. lycopersicum in China

Gou,

Aung,

Guo

et al. 2023

JoF

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Small-spored Alternaria species have been frequently isolated from diseased leaves of Solanum plants. To clarify the diversity of small-spored Alternaria species, a total of 118 strains were obtained from leaf samples of S. tuberosum and S. lycopersicum in six provinces of China during 2022–2023. Based on morphological characterization and multi-locus phylogenetic analysis of the internal transcribed spacer of the rDNA region (ITS), glyceraldehyde-3-phosphate dehydrogenase (GAPDH), translation elongation factor 1 alpha (TEF1), RNA polymerase second largest subunit (RPB2), Alternaria major allergen gene (Alt a 1), endopolygalacturonase gene (EndoPG) and an anonymous gene region (OPA10-2), seven species were determined, including four novel species and three known species (A. alternata, A. gossypina and A. arborescens). The novel species were described and illustrated as A. longxiensis sp. nov., A. lijiangensis sp. nov., A. lycopersici sp. nov. and A. solanicola sp. nov.. In addition, the pathogenicity of the seven species was evaluated on potato leaves. The species exhibited various aggressiveness, which could help in disease management.

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Characterization of New Small-Spored Alternaria Species Isolated from Solanaceae in Algeria

Cited by 10 publications

References 56 publications

Pathogenicity and diversity of large‐spored Alternaria associated with three solanaceous vegetables (Solanum tuberosum, S. lycopersicum and S. melongena) in China

Pathogenicity and diversity of large‐spored Alternaria associated with three solanaceous vegetables (Solanum tuberosum, S. lycopersicum and S. melongena) in China

Alternaria diseases on potato and tomato

Four New Species of Small-Spored Alternaria Isolated from Solanum tuberosum and S. lycopersicum in China

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