Damage caused by Alternaria alternata to the quality and germination of amaranth seeds

Noelting, María Cristina; Sisterna, Marina Noemí; Sulyok, Michael; Abbiati, Nora; Molina, M. C.

doi:10.1007/s10658-022-02468-z

Cited by 4 publications

(2 citation statements)

References 17 publications

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“…Initially, these lesions remained confined within specific parallel leaf veins [ 26 ]. In the context of amaranth, A. alternata emerged as one of the primary microorganisms responsible for infections and seed discoloration [ 27 ].…”

Section: Discussionmentioning

confidence: 99%

Characterization of Alternaria alternata and Alternaria scrophulariae Brown Spot in Colombian quinoa (Chenopodium quinoa)

Fonseca-Guerra,

Beltrán Pineda,

Benavides Rozo

2023

JoF

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Alternaria is a saprophytic and opportunistic fungus with a worldwide distribution that can affect the quality of various agricultural products, such as fruits, cereals, and pseudocereals. This research was carried out to investigate the population of this genus associated with quinoa cultivation in plots located in the Boyacá department (Colombia), the country’s third-largest quinoa-producing department. The present study found 17 Alternaria isolates, of which 13 were identified as A. alternata and 4 as A. scrophulariae (formerly A. conjuncta) employed molecular markers of internal transcribed spacer (ITS) region and translation elongation factor 1α (TEF-1α). In the pathogenicity test under greenhouse conditions, all the Alternaria isolates showed some degree of pathogenicity on Piartal quinoa cultivar plants although no significant differences were found in isolates. The severity indices ranged from 2 to 5, and the percentage of affected leaves per plant ranged between 15% and 40%. This fungus affected the foliar tissue of quinoa, resulting in chlorotic and necrotic spots, symptoms that can generate a reduction in the quality and productivity of crops. This is the first time that the pathogenicity of Alternaria spp. in the Piartal variety has been described and the first report of this genera in quinoa crops of Colombia.

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Section: Discussionmentioning

confidence: 99%

Characterization of Alternaria alternata and Alternaria scrophulariae Brown Spot in Colombian quinoa (Chenopodium quinoa)

Fonseca-Guerra,

Beltrán Pineda,

Benavides Rozo

2023

JoF

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“…This disease first appears as brown necrotic lesions on fruits or leaves, which may further merge into larger necrotic areas, resulting in leaf drop or fruit tissue decay pre-harvest [1][2][3]. During storage, A. alternata not only causes serious rotting in fruit tissues, but also causes the accumulation of mycotoxins that lower pear quality, shorten the storage period and reduce market value [4,5], ultimately leading to serious economic losses and food safety problems [6]. Owing to its wide existence in nature in the form of saprophytes or pathogens, a broad host range and the significant transmission ability and pathogenicity, A. alternata is difficult to prevent and control [7,8].…”

Section: Introductionmentioning

confidence: 99%

Biocontrol Potential of Streptomyces odonnellii SZF-179 toward Alternaria alternata to Control Pear Black Spot Disease

Zhang,

Wen,

Wang

et al. 2023

IJMS

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Pear black spot disease, caused by Alternaria alternata, is a devastating disease in pears and leads to enormous economic losses worldwide. In this investigation, we isolated a Streptomyces odonnellii SZF-179 from the rhizosphere soil of pear plants in China. Indoor confrontation experiments results showed that both SZF-179 and its aseptic filtrate had excellent inhibitory effects against A. alternata. Afterwards, the main antifungal compound of SZF-179 was identified as polyene, with thermal and pH stability in the environment. A microscopic examination of A. alternata mycelium showed severe morphological abnormalities caused by SZF-179. Protective studies showed that SZF-179 fermentation broth could significantly reduce the diameter of the necrotic lesions on pear leaves by 42.25%. Furthermore, the potential of fermentation broth as a foliar treatment to control black leaf spot was also evaluated. Disease indexes of ‘Hosui’ and ‘Wonwhang’ pear plants treated with SZF-179 fermentation broth were lower than that of control plants. Overall, SZF-179 is expected to be developed into a safe and broad-spectrum biocontrol agent. No studies to date have evaluated the utility of S. odonnellii for the control of pear black spot disease; our study fills this research gap. Collectively, our findings provide new insights that will aid the control of pear black spot disease, as well as future studies of S. odonnellii strains.

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Symbiotic Relationships with Fungi: From Mutualism to Parasitism

El-Metwally

Mekawey²,

El-Halmouch³

et al. 2023

Plant Mycobiome

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Damage caused by Alternaria alternata to the quality and germination of amaranth seeds

Cited by 4 publications

References 17 publications

Characterization of Alternaria alternata and Alternaria scrophulariae Brown Spot in Colombian quinoa (Chenopodium quinoa)

Characterization of Alternaria alternata and Alternaria scrophulariae Brown Spot in Colombian quinoa (Chenopodium quinoa)

Biocontrol Potential of Streptomyces odonnellii SZF-179 toward Alternaria alternata to Control Pear Black Spot Disease

Symbiotic Relationships with Fungi: From Mutualism to Parasitism

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