Occurrence of leaf spot of oat caused by Alternaria alternata in Multan, Punjab, Pakistan

Raza, Ali; Afnan, Muhammad; Ali, Asghar; Naqvi, Syed Atif Hasan; Sherwani, Hameed Ullah Khan; Nouman, Muhammad Fahad; Saqib, H.M.U.

doi:10.33804/pp.002.03.3138

Cited by 3 publications

(1 citation statement)

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“…Naked oat SRD differs from rice SRD 17,18 in that it is associated with one pathogen. Oat leaf spot disease is only caused by Alternaria alternata [45][46][47] . Alternaria is one of the main mycotoxigenic fungal genera found in cereals worldwide 48 , causing diseases in over 400 host plants and postharvest spoilage of several crops 49,50 .…”

Section: Discussionmentioning

confidence: 99%

Community structure of fungal pathogens causing spikelet rot disease of naked oat from different ecological regions of China

Liu

et al. 2021

Sci Rep

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Spikelet rot disease (SRD) is an emerging disease of the grain surface of naked oat in China that affects both grain yield and quality. The typical symptom is discoloration from the black structures of the causal fungi. Here, we investigated the fungal communities on the grain surfaces of cultivar Bayou 13 grown in ten ecological oat-producing regions of China, to identify the main pathogens of naked oat SRD. Our results showed that the growth of Alternaria spp. and Davidiella spp. exhibited a competitive relationship and was mainly affected by the elevations of all 10 ecological regions. The dominant pathogens were Davidiella spp. in Shannan Prefecture in Tibet and Haidong Prefecture in Qinghai Province and Alternaria spp. in the other eight regions. The ratios of black pathogens of interest to all pathogens in Shannan Prefecture and Haidong Prefecture were significantly lower than those of the other eight regions, thus indicating that SRD mainly occurred in regions below 2000 m (elevation). We isolated black fungal pathogens from grain surfaces and deduced that they were Alternaria spp. by sequence comparison. The blackened appearance of the grain surfaces was more evident under spray inoculation with a spore suspension of Alternaria than under the control in greenhouse experiments. The recovered pathogen was the same as the pathogen used for inoculation. We thus concluded that Alternaria alone causes naked oat SRD and mainly infects naked oat in regions below 2000 m, which provides a basis for the recognition and management of SRD of naked oat.

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Section: Discussionmentioning

confidence: 99%

Community structure of fungal pathogens causing spikelet rot disease of naked oat from different ecological regions of China

Liu

et al. 2021

Sci Rep

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Virulence analysis of leaf and stripe rust populations in Pakistan through avirulence to virulence formula

Ali¹,

Khan

Hussain

et al. 2020

Archives of Phytopathology and Plant Protection

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Detection of Alternaria alternata Associated with Discolored Black Oat Seeds in Korea

Choi,

Song,

Ahn

et al. 2023

Res. Plant Dis

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In 2023, a number of seeds suspected to be discolored black oat seeds on oat farms in Gangjin were observed and examined for fungal infection. The species <i>Alternaria alternata</i> was predominant, accounting for 84% of all fungal infections. The appearance and quality of seeds harvested in 2022 were compared with seeds harvested in 2023 from the same field. The lightness value was lower in the seeds harvested in 2023, while the electrical conductivity was higher in the seeds harvested in 2023. The content of avenanthramide was found to be 10 times higher in the 2023 seeds than in those harvested in 2022. The accumulated precipitation in Gangjin in May 2023 was 230 times higher than that in May 2022, and the average relative humidity was high. These conditions created an environment suitable for infection of <i>A. alternata</i>, which were thought to have caused discolored black oat seeds.

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Occurrence of leaf spot of oat caused by Alternaria alternata in Multan, Punjab, Pakistan

Cited by 3 publications

References 0 publications

Community structure of fungal pathogens causing spikelet rot disease of naked oat from different ecological regions of China

Community structure of fungal pathogens causing spikelet rot disease of naked oat from different ecological regions of China

Virulence analysis of leaf and stripe rust populations in Pakistan through avirulence to virulence formula

Detection of Alternaria alternata Associated with Discolored Black Oat Seeds in Korea

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