Investigations into the seed and mealybug transmission of<i>Taro bacilliform virus</i>

Macanawai, A. R.; Ebenebe, Adama A.; Hunter, David G.; Devitt, Luke; Hafner, Gregory; Harding, Robert M.

doi:10.1071/ap04084

Cited by 21 publications

(12 citation statements)

References 8 publications

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“…The symptoms of TaBV in taro include vein chlorosis, stunting, and leaves curling downwards (Figure 2) [4]. The virus is transmissible through three methods—the mealybug vector, vegetative propagation, and via seeds or pollen—while no mechanical transmission has so far been reported [41,45,46]. However, a study has shown that TaBV-infected plants may or may not exhibit symptoms, where the majority of the symptoms are observed on the youngest leaves [46].…”

Section: Taro Bacilliform Virusmentioning

confidence: 99%

“…The virus is transmissible through three methods—the mealybug vector, vegetative propagation, and via seeds or pollen—while no mechanical transmission has so far been reported [41,45,46]. However, a study has shown that TaBV-infected plants may or may not exhibit symptoms, where the majority of the symptoms are observed on the youngest leaves [46]. The existence of symptomless plants with TaBV leads to speculation that the virus must be present with another virus to allow for the plants to be symptomatic [4].…”

Section: Taro Bacilliform Virusmentioning

confidence: 99%

“…This is the case for TaBV being present alongside a putative rhabdovirus, CBDV, which leads to the lethal Alomae disease [5,47]. However, another serological study found that bacilliform-like particles only exist in the insect vector, but not in the infected plants [46]. The virus latency would prove to be a challenge in diagnosis, as a small amount of virus could still remain in a community without exhibiting any symptoms, and, when combined with vegetative propagation, the virus could rapidly spread into the crop community [29].…”

Section: Taro Bacilliform Virusmentioning

confidence: 99%

“…The virus has been related to the infamous taro diseases, Alomae and Bobone, with several studies confirming the presence of CBDV in taro infected by either of the diseases, although the direct causality remains unclear [22,46]. Both of the diseases cause the plants to exhibit symptoms, such as stunting, gall formation in petioles, plus thickened veins and leaf blades (Figure 2).…”

Section: Colocasia Bobone Disease Virusmentioning

confidence: 99%

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A Review on Viruses Infecting Taro (Colocasia esculenta (L.) Schott)

et al. 2019

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Taro is an important crop in parts of the world, especially in the Pacific Islands. Like all plants, it is also susceptible to virus infections that could result in diseases, which negatively affects the source of food and trade revenue. Understanding the biology of taro viruses could improve current knowledge regarding the relationship between viruses and taro, thus allowing for a better approach towards the management of the diseases that are associated with them. By compiling and discussing the research on taro and its four major viruses (Dasheen mosaic virus, Taro bacilliform virus, Colocasia bobone disease virus, and Taro vein chlorosis virus) and a relatively new one (Taro bacilliform CH virus), this paper explores the details of each virus by examining their characteristics and highlighting information that could be used to mitigate taro infections and disease management.

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Section: Taro Bacilliform Virusmentioning

confidence: 99%

Section: Taro Bacilliform Virusmentioning

confidence: 99%

Section: Taro Bacilliform Virusmentioning

confidence: 99%

Section: Colocasia Bobone Disease Virusmentioning

confidence: 99%

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A Review on Viruses Infecting Taro (Colocasia esculenta (L.) Schott)

et al. 2019

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“…To date, TaBV and TaBCHV appear to be restricted to host plants in the family Araceae. TaBV is transmitted mainly by vegetative propagation, mealybugs in a semipersistent manner, and in some cases through seed or pollen, but it is not mechanically transmissible (Gollifer et al ., ; Macanawai et al ., ). Although no consistent symptoms have been associated with TaBV infection, there have been some reports of mild symptoms such as vein clearing, stunting and downward curling of the leaf blades in some cultivars (Yang et al ., ; Revill et al ., ; Kidanemariam et al ., ).…”

Section: Introductionmentioning

confidence: 97%

Identification and molecular characterization of Taro bacilliform virus and Taro bacilliform CH virus from East Africa

et al. 2018

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Taro (Colocasia esculenta) and tannia (Xanthosoma sp.) are important root crops cultivated mainly by small‐scale farmers in sub‐Saharan Africa and the South Pacific. Viruses are known to be one of the most important constraints to production, with infections resulting in severe yield reduction. In 2014 and 2015, surveys were conducted in Ethiopia, Kenya, Tanzania and Uganda to determine the identity of viruses infecting taro in East Africa. Screening of 392 samples collected from the region using degenerate badnavirus primers revealed an incidence of 58–74% among the four countries surveyed, with sequence analysis identifying both Taro bacilliform virus (TaBV) and Taro bacilliform CH virus (TaBCHV). TaBCHV was identified from all four countries while TaBV was identified in all except Ethiopia. Full‐length sequences from representative TaBV and TaBCHV isolates showed that the genome organization of TaBV isolates from East Africa was consistent with previous reports while TaBCHV isolates from East Africa were found to encode only four ORFs, distinct from a previous report from China. Phylogenetic analysis showed that all East African TaBV isolates form a single subgroup within known TaBV isolates, while TaBCHV isolates form at least two distinct subgroups. To the authors' knowledge, this is the first report describing the occurrence and genome organization of TaBV and TaBCHV isolates from East Africa and the first full‐length sequence of the two viruses from tannia.

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