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Agroinfection of sweet potato by vacuum infiltration of an infectious sweepovirus

  • Research Article
  • Published:
Virologica Sinica

Abstract

Sweepovirus is an important monopartite begomovirus that infects plants of the genus Ipomoea worldwide. Development of artificial infection methods for sweepovirus using agroinoculation is a highly efficient means of studying infectivity in sweet potato. Unlike other begomoviruses, it has proven difficult to infect sweet potato plants with sweepoviruses using infectious clones. A novel sweepovirus, called Sweet potato leaf curl virus-Jiangsu (SPLCV-JS), was recently identified in China. In addition, the infectivity of the SPLCV-JS clone has been demonstrated in Nicotiana benthamiana. Here we describe the agroinfection of the sweet potato cultivar Xushu 22 with the SPLCV-JS infectious clone using vacuum infiltration. Yellowing symptoms were observed in newly emerged leaves. Molecular analysis confirmed successful inoculation by the detection of viral DNA. A synergistic effect of SPLCV-JS and the heterologous betasatellite DNA-β of Tomato yellow leaf curl China virus isolate Y10 (TYLCCNV-Y10) on enhanced symptom severity and viral DNA accumulation was confirmed. The development of a routine agroinoculation system in sweet potato with SPLCV-JS using vacuum infiltration should facilitate the molecular study of sweepovirus in this host and permit the evaluation of virus resistance of sweet potato plants in breeding programs.

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Authors and Affiliations

  1. National Key Laboratory of Plant Molecular Genetics, Institute of Plant Physiology and Ecology, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences, Shanghai, 200032, China

    Huiping Bi & Peng Zhang

  2. Key Laboratory of Systems Microbial Biotechnology, Tianjin Institute of Industrial Biotechnology, Chinese Academy of Sciences, Tianjin, 300308, China

    Huiping Bi

  3. Shanghai Chenshan Plant Science Research Center, Chinese Academy of Sciences, Shanghai, 201602, China

    Peng Zhang

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  1. Huiping Bi
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  2. Peng Zhang
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Correspondence to Peng Zhang.

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Bi, H., Zhang, P. Agroinfection of sweet potato by vacuum infiltration of an infectious sweepovirus. Virol. Sin. 29, 148–154 (2014). https://doi.org/10.1007/s12250-014-3430-1

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  • DOI: https://doi.org/10.1007/s12250-014-3430-1

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