Viruses of <i>Poaceae</i>: a case history in plant pathology

Plumb, R. T.

doi:10.1046/j.1365-3059.2002.00790.x

Cited by 12 publications

(3 citation statements)

References 24 publications

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“…Barley yellow mosaic disease is one of the most important diseases of winter barley in north‐western Europe and East Asia (Plumb, 2002). It is caused by Barley mild mosaic virus (BaMMV) and Barley yellow mosaic virus (BaYMV), both transmitted by Polymyxa graminis Ledingham (Toyama and Kusaba, 1970), and belonging to the genus Bymovirus within the family Potyviridae (Adams et al., 2005).…”

Section: Introductionmentioning

confidence: 99%

Identification of Barley mild mosaic virus Isolates in Germany Breaking rym5 Resistance*

Habekuß¹,

Kühne²,

Krämer³

et al. 2007

Journal of Phytopathology

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In winter and early spring 2004 unequivocal mosaic symptoms were detected for the first time in Germany on six plants of the barley cv. ÔTokyoÕ carrying the resistance gene rym5. By serological and electron microscopic investigations Barley mild mosaic virus (BaMMV) was identified in all plants and could be re-transmitted to cv. ÔTokyoÕ as well as to additional cultivars carrying rym5. In contrast to this, genotypes carrying the resistance genes rym1 + rym5, Rym2, rym4, rym7, rym9, rym11, rym12, rym13, Rym14 Hb , rym15 or Rym16 Hb turned out to be resistant. Furthermore, the BaMMV isolates were not transmissible to different dicotyledonous species. Sequence analyses in the VPg coding region of RNA1 revealed differences to the known sequence of the original BaMMV isolate (BaMMV-ASL1, AJ 242725) and also of a French pathotype (BaMMV-Sil, AJ 544267, AJ 544268) which is also able to overcome the resistance mediated by rym5. At least in one location a spread of the area infested by this new strain was observed in 2004 ⁄ 2005 and 2005 ⁄ 2006.

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Section: Introductionmentioning

confidence: 99%

Identification of Barley mild mosaic virus Isolates in Germany Breaking rym5 Resistance*

Habekuß¹,

Kühne²,

Krämer³

et al. 2007

Journal of Phytopathology

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“…The viruliferous aphid vectors colonizing newly seeded areas introduce the disease into the field (primary inoculations) and, once the first hosts are infectious, subsequent aphids feeding on infected hosts spread the virus (secondary inoculations) within the field. Rhopalosiphum padi is generally blamed for most of the autumnal infections before sexual morphs migrate to their primary host Prunus padus , while S. avenae feeds almost exclusively on grasses and cereals and is the main driver of their infection in the spring . During mild winters, both species can survive and spread viruses.…”

Section: Main Control Methods Against Ydvmentioning

confidence: 99%

Management of yellow dwarf disease in Europe in a post‐neonicotinoid agriculture

Namara

Gauthier

Walsh

et al. 2020

Pest Management Science

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Barley/cereal yellow dwarf viruses (YDVs) cause yellow dwarf disease (YDD), which is a continuous risk to cereals production worldwide. These viruses cause leaf yellowing and stunting, resulting in yield reductions of up to 80%. YDVs have been a consistent but low-level problem in European cereal cultivation for the last three decades, mostly due to the availability of several effective insecticides (largely pyrethroids and more recently neonicotinoids) against aphid vectors. However, this has changed recently, with many insecticides being lost, culminating in a recent European Union (EU) regulation prohibiting outdoor use of the neonicotinoid-insecticide compounds. This change is coupled with the growing challenge of insecticide-resistant aphids, the lack of genetic resources against YDVs, and a knowledge deficit around the parameters responsible for the emergence and spread of YDD. This means that economic sustainability of cereal cultivation in several European countries including France and United Kingdom is now again threatened by this aphid-vectored viral disease. In this review, we summarize the current knowledge on the YDV pathosystem, describe management options against YDD, analyse the impacts of the neonicotinoid ban in Europe, and consider future strategies to control YDV.

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“…Barley mild mosaic virus (BaMMV) and Barley yellow mosaic virus (BaYMV) are the causal agents of the economically important soilborne barley mosaic disease of winter barley in North‐western Europe and East Asia (Huth & Adams, 1990; Plumb, 2002). Both viruses are members of the genus Bymovirus (family Potyviridae ) transmitted by the plasmodiophorid soilborne vector Polymyxa graminis .…”

Section: Introductionmentioning

confidence: 99%

Investigating resistance toBarley mild mosaic virus

McGrann

Adams

2004

Plant Pathology

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There are claims that at least 11 genes confer resistance in barley (Hordeum vulgaris) to one or more components of the soilborne barley mosaic virus complex but, apart from the immunity conferred by the widely used gene rym4, little is known about their mode of action. This study used mechanical (sap) and plasmodiophorid vector‐inoculation techniques combined with ELISA, RT‐PCR, symptom development and virus transmission to investigate the response of different genotypes to Barley mild mosaic virus (BaMMV). Barley genotypes were grown at 20 and 12°C to test for temperature sensitivity. Plants with the genes rym3 or rym6 were fully susceptible to the virus, whereas those with genes rym1, Rym2, rym5 or rym11 appeared to be immune, as BaMMV was never detected in any tissue type nor was the virus transmitted from them to susceptible genotypes. The remaining genotypes could all be infected to some extent by BaMMV using one or both inoculation methods, and virus could be transmitted from their roots by the plasmodiophorid vector Polymyxa graminis. Plants with the rym7 gene had delayed symptoms compared to susceptible controls at 12°C. Plants with the rym8 gene could be infected by both inoculation methods, but there was no virus in the leaves at 12°C. Plants with the rym9 gene could be infected only by vector inoculation, and virus remained localized in the roots. Plants with the rym10 gene appeared susceptible by mechanical inoculation at both temperatures, but after vector inoculation virus moved to leaves only at 20°C. This suggests the operation of translocation resistance in plants with the rym8, rym9 or rym10 genes, which is temperature‐sensitive in rym8 and rym10 and perhaps tissue‐specific in rym9. No resistance to P. graminis was observed in any of the genotypes.

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Viruses of Poaceae: a case history in plant pathology

Cited by 12 publications

References 24 publications

Identification of Barley mild mosaic virus Isolates in Germany Breaking rym5 Resistance*

Identification of Barley mild mosaic virus Isolates in Germany Breaking rym5 Resistance*

Management of yellow dwarf disease in Europe in a post‐neonicotinoid agriculture

Investigating resistance toBarley mild mosaic virus

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