Crop losses in Brazilian cassava varieties induced by the Cassava common mosaic virus

Venturini, Marcela Tonini; Araújo, Taylane da Silva; Abreu, E. F. M.; Andrade, E. C. de; Santos, V. da S.; Silva, Marcos Roberto da; Oliveira, E. J. de

doi:10.1590/0103-9016-2015-0374

Cited by 20 publications

(28 citation statements)

References 17 publications

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“…This work highlights the importance of CsCMV early detection in cassava crops in the NEA region of Argentina. Although cassava common mosaic disease (CCMD) has been considered to be of minor importance, current studies indicate it can be associated with up to 30% yield losses in cassava (Venturini et al ., ). The study here reports an incidence of up to 85.2% of CsCMV in the NEA region, comparable to the 96% incidence reported in the neighbouring Brazilian state of Paraná (Silva et al ., ).…”

Section: Discussionmentioning

confidence: 97%

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Distinct strains of the re‐emergent Cassava common mosaic virus (genus: Potexvirus) infecting cassava in Argentina

Cuellar

Celli

et al. 2018

Plant Pathology

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Cassava common mosaic disease (CCMD) has been reported in all regions where cassava is grown in the Americas and the causal agent, Cassava common mosaic virus (CsCMV), has been identified as a mechanically transmitted potexvirus (Alphaflexiviridae). In Argentina, cassava is grown mainly in the northeast (NEA) region that shares borders with Brazil and Paraguay. Increasing incidences of CCMD were observed during the years 2014 to 2016 associated with severe leaf mosaic symptoms and yield reductions where the occurrence of CsCMV was confirmed by RT‐PCR and sequencing. In this work, the virus has been successfully purified and a double‐antibody sandwich (DAS‐) ELISA test has been developed from an Argentinean isolate of CsCMV to extend the diagnostics of the disease. A collection of 726 samples was screened and CsCMV was detected with 100% prevalence in the NEA region. Additional co‐infecting viruses were detected in some plants (64.4%); in these, CCMD symptoms correlated with CsCMV only, although more severe symptoms could be observed in mixed infected plants. Sequence analysis of the conserved RdRp domain showed a wider diversity of CsCMV isolates. Interestingly, a separate phylogenetic cluster was formed by isolates from the NEA region that only shared 77.1% to 80.3% nucleotide identity with the other clusters. These results indicate the presence of mixed strains occurring in the NEA region and suggest the presence of geographically distinct strains of CsCMV in South America.

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Section: Discussionmentioning

confidence: 97%

“…The affected plants develop mosaic and chlorosis in leaves, with increased severity in the subtropical zones of South America due to the prolonged cold periods (Calvert et al ., ). The effects on reduction in root yield caused by CsCMV can be from 30% to 60% (Costa & Kitajima, ; Venturini et al ., ).…”

Section: Introductionmentioning

confidence: 97%

Distinct strains of the re‐emergent Cassava common mosaic virus (genus: Potexvirus) infecting cassava in Argentina

Cuellar

Celli

et al. 2018

Plant Pathology

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“…Cassava-CsCMV compatible viral infection causes 30-60% yield reduction of cassava roots (Costa and Kitajima 1972; Venturini el al. 2016; Zanini et al 2020).…”

Section: Discussionmentioning

confidence: 99%

“…Since cassava is vegetatively propagated, its yield is greatly restrained by viral diseases (Legg et al 2015). Among all reported cassava-infecting potexviruses (Lozano et al 2017), Cassava common mosaic virus (CsCMV) has been identified as the only one able to cause disease in single infection and to produce significant yield losses (Costa and Kitajima 1972; Venturini et al 2016; Zanini et al 2020). This pathogen has been detected infecting cassava crops in South America (Calvert et al 2012; Chaparro-Martinez and Trujillo-Pinto 2003; Silva et al 2011; Fernandez et al 2017; Zanini et al 2018) and recently in China (Tuo et al 2020).…”

Section: Introductionmentioning

confidence: 99%

“…Given the significant yield losses caused by CsCMV (from 30% to 60%) (Costa and Kitajima 1972; Venturini et al 2016; Zanini et al 2020), it is imperative to investigate the physiological basis underlying cassava-CsCMV interplay. To extend the knowledge acquired in previous studies by Tascon et al (1975), we focused our research on morphological and functional alteration of cassava chloroplast.…”

Section: Introductionmentioning

confidence: 99%

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Cassava common mosaic viruscauses photosynthetic alterations associated with changes in chloroplast ultrastructure and carbohydrate metabolism of cassava plants

Luna

et al. 2020

Preprint

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Differentiation of phylogenetic lineages within the ‘Colletotrichum gloeosporioides species complex’ associated with cassava anthracnose disease by PCR-RFLP

Silva

Pestana

Ferreira

et al. 2018

Trop. plant pathol.

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Different species were found associated with cassava anthracnose, considered a major disease of this crop. The correct identification of the causal agent is a first step for defining appropriate control strategies, such as resistant varieties. In silico analyses used sequences of six genomic regions of ex-type specimens from the 'Colletotrichum gloeosporioides species complex' (C.g.SC) and 21 restriction enzymes to identify phylogenetic lineages. The three best combinations of region/enzymes were validated in 18 Colletotrichum spp. isolates from cassava. Dendrograms for in silico PCR-RFLP for CAL, ITS and TUB2 showed considerable agreement with the phylogenetic analysis of each genomic region; however, the CAL gene presented greater discriminatory power. Since the band patterns from in gel analysis were almost the same as expected for the in silico analysis for the CAL region, a new approach was proposed based on the combined data from these two methodologies, allowing the differentiation of five phylogenetic lineages within the C.g.SC (C. tropicale; C. fructicola; C. siamense; C. gloeosporioides sensu stricto and C. theobromicola), and one outside of this complex (C. cliviae). This evaluation showed to be a reliable technique for preliminary identification of species prior to sequencing.

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Crop losses in Brazilian cassava varieties induced by the Cassava common mosaic virus

Abstract: Despite the widespread distribution of the Cassava common mosaic virus (CsCMV) in Brazil, little is known about the losses it causes in yield. The effect of CsCMV on different va-

Cited by 20 publications

References 17 publications

Distinct strains of the re‐emergent Cassava common mosaic virus (genus: Potexvirus) infecting cassava in Argentina

Distinct strains of the re‐emergent Cassava common mosaic virus (genus: Potexvirus) infecting cassava in Argentina

Cassava common mosaic viruscauses photosynthetic alterations associated with changes in chloroplast ultrastructure and carbohydrate metabolism of cassava plants

Differentiation of phylogenetic lineages within the ‘Colletotrichum gloeosporioides species complex’ associated with cassava anthracnose disease by PCR-RFLP

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