Future challenges in virus transmission by Polymyxa
(2011) International Working Group on Plant Viruses with Fungal Vectors — Location: Louvain-la-Neuve (6.July.2011)
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- Abstract
- The incidence of phytoviruses transmitted by Polymyxa graminis and P. betae remains economically important in major crops such as sugar beet and cereals. Over the past 20 years, the use of varieties with resistance to Beet necrotic yellow vein virus or to cereal mosaic viruses such as Barley yellow mosaic virus or Soil-borne cereal mosaic virus has been the only way to achieve profitable yields on highly rhizomania- or mosaic-infested soils, respectively. The effectiveness of this strategy is limited, however, by the occurrence of resistance-breaking viral isolates or the absence of resistance in some plant species. In the context of integrated pest management, the development of control strategies against the vector would be useful, but this requires better knowledge of the soil ecology and an understanding of the molecular interaction between the vector Polymyxa and the host plant, as well as between Polymyxa and the virus it transmits. Recent studies have sought to develop new models that overcome the difficulties associated with the specific parasitism of Polymyxa spp. We describe here how the recent identification of a compatible Arabidopsis thaliana-P. betae interaction and the development of a dual in vitro culture system of P. betae on sugar hairy roots could help to improve knowledge in this area. The new approaches for investigating the virus acquisition and transmission processes by Polymyxa under controlled conditions, and for evaluating the specificity of the interaction between Polymyxa spp. and f.spp. isolates and the viruses vectored by them, are presented from the perspective of a risk assessment of the increased prevalence of viruses and vectors associated with distinct pathosystems.
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Citations
Legrève, A., Desoignies, N., Dieryck, B., & Bragard, C. (2011). Future challenges in virus transmission by Polymyxa. In Ed. U. Merz (ed.), Proceedings of the Eigth Symposium of the International Working Group on Plant Viruses with Fungal Vectors (pp. 47-51). https://hdl.handle.net/2078.5/255874