Pathogenicity and aggressiveness of Macrophomina phaseolina isolates to castor (Ricinus communis)

Claudino, Monaliza R.; Soares, D. J.

doi:10.1590/s1982-56762014000600006

Cited by 19 publications

(11 citation statements)

References 12 publications

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“…Claudino and Soares () hypothesized that in addition to M. phaseolina , other species of Macrophomina could be present in Brazil. This was recently confirmed by the report of M. euphorbiicola and M. pseudophaseolina associated with charcoal rot of oilseed crops in this country (Machado et al, ).…”

Section: Introductionmentioning

confidence: 99%

Identification and pathogenicity of Macrophomina species collected from weeds in melon fields in Northeastern Brazil

Negreiros

Júnior

León

et al. 2019

Journal of Phytopathology

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In this work, a collection of 94 Macrophomina isolates obtained from roots of two weed species, Trianthema portulacastrum and Boerhavia diffusa, collected during surveys conducted during 2015 and 2016 in melon production fields in Northeastern Brazil, were characterized by using molecular techniques. Phylogenetic analysis of the EF1‐α gene allowed the identification of 32 isolates as M. phaseolina and 62 isolates as M. pseudophaseolina. Results of a pathogenicity test performed on melon seedlings of the cv. “Gladial” revealed that all M. phaseolina isolates inoculated were able to cause disease to melon seedlings, but only some M. pseudophaseolina isolates were able to infect them. This study represents the first report of M. pseudophaseolina in both T. portulacastrum and B. diffusa weeds, which are prevalent in the main Brazilian melon producing and exporting regions. Information about the biology and epidemiology of M. pseudophaseolina is scarce because of its recent description; thus, further research is needed for a better understanding of this fungus as a potentially emerging pathogen of melon and other crops.

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Section: Introductionmentioning

confidence: 99%

Identification and pathogenicity of Macrophomina species collected from weeds in melon fields in Northeastern Brazil

Negreiros

Júnior

León

et al. 2019

Journal of Phytopathology

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“…Similarly, L. pseudotheobromae was the more virulent species on A. muricata , but could not be differentiated from the other species on atemoya. This may be attributable to a possible variation in levels of virulence between different isolates of the same species, as has already been observed for Macrophomina (Claudino & Soares, ); alternatively, each host may have responded differently to infection by each species, as was demonstrated by Coutinho et al () and Zlatković et al (). In future studies, these hypotheses could be verified by cross inoculation of the same isolates in these three hosts.…”

Section: Discussionmentioning

confidence: 75%

Botryosphaeriaceae species causing dieback on Annonaceae in Brazil

Machado

Custódio²,

Cabral³

et al. 2019

Plant Pathology

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In Brazil, the Annonaceae species Annona muricata, A. squamosa, A. cherimola and atemoya (a hybrid of A. cherimola and A. squamosa) are cultivated in several regions, and produce fruits that are highly appreciated by consumers and are of great economic importance. Among the several diseases that can affect these crops, dieback is one of the most important, causing damage and, in the most severe cases, death of the plants. Due to the lack of suitable diagnostic studies up to now, this work aimed to identify the Botryosphaeriaceae species that cause dieback on Annonaceae in Brazil. Based on combined phylogenetic analyses of ITS, TEF‐1α, TUB2 and RPB2, eight species of Botryosphaeriaceae were identified, namely Lasiodiplodia brasiliense, L. crassispora, L. hormozganensis, L. iraniensis, L. pseudotheobromae, L. subglobosa, L. theobromae and Pseudofusicoccum stromaticum. All species found in this study were pathogenic and caused symptoms of necrosis in stems and dieback. Thus, this study confirms species of Botryosphaeriaceae as causal agents of dieback on Annonaceae in Brazil.

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“…The selected isolates were grown on PDA plates for 7 days at 25°C. After this, 15 fungal mycelium discs were transferred into Erlenmeyer flasks containing 50 g sterilized rice with 10 ml sterilized distilled water, and incubated for 15 days at 25°C (Claudino and Soares, 2014).…”

Section: Methodsmentioning

confidence: 99%

Identification and pathogenicity of Botryosphaeriaceae species associated with root and stem rot of sweet potato in Brazil

et al. 2021

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The sweet potato (Ipomoea batatas) is characterized by the production of tuberous roots rich in starch and is one of the most produced and consumed vegetables in Brazil. Botryosphaeriaceae, among other fungi, are known to cause root and stem rot of sweet potato. However, no representative and accurate study has been performed for the correct identification of these fungal species in sweet potato in Brazil. Therefore, this study aimed to identify the Botryosphaeriaceae species associated with root and stem rot of sweet potato and confirm their pathogenicity. Tuberous roots and stems of sweet potato with rot symptoms were collected in production fields and markets and used for fungal isolations. The identification of fungi was based on the morphology of reproductive structures and phylogenetic analyses of the gene regions ITS, tef1‐α, and rpb2. The following species were identified: Lasiodiplodia theobromae, L. hormozganensis, Macrophomina phaseolina, M. euphorbiicola, M. pseudophaseolina, and Neoscytalidium dimidiatum. For the pathogenicity test, one representative isolate for each species was inoculated in healthy tuberous roots and in 30‐day‐old healthy seedlings. Black and necrotic lesions on tuberous roots and stems were observed in all replications and resulted in the death of some seedlings. This is the first report of L. hormozganensis, M. pseudophaseolina, and M. euphorbiicola, as causal agents of the stem and root rot of sweet potato and N. dimidiatum as a causal agent of stem rot worldwide.

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Pathogenicity and aggressiveness of Macrophomina phaseolina isolates to castor (Ricinus communis)

Cited by 19 publications

References 12 publications

Identification and pathogenicity of Macrophomina species collected from weeds in melon fields in Northeastern Brazil

Identification and pathogenicity of Macrophomina species collected from weeds in melon fields in Northeastern Brazil

Botryosphaeriaceae species causing dieback on Annonaceae in Brazil

Identification and pathogenicity of Botryosphaeriaceae species associated with root and stem rot of sweet potato in Brazil

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