Abstract
The role of heat shock proteins (HSPs) in viral replication has been described in numerous publications. Wheat yellow mosaic virus (WYMV) belongs to the genus Bymovirus (family Potyviridae), which causes yellow mosaic and dwarf symptoms in wheat (Triticum aestivum). In this study, the T. aestivum heat shock protein 23.6 (TaHSP23.6), which belongs to the small heat shock protein family, was shown to interact with the WYMV coat protein (CP) in a yeast two-hybrid screen. The co-localization and interaction between TaHSP23.6 and WYMV CP were additionally verified in Nicotiana benthamiana by co-localization assays and bimolecular fluorescence complementation (BiFC). Not only the transcription of TaHSP23.6 but also that of other HSP family members (TaHSP70, TaHSP90, and TaHSP101) was up-regulated in WYMV-infected leaves, as shown by semi-quantitative PCR assays. Interestingly, the expression levels of the T. aestivum heat stress transcription factor A2 (TaHSFA2) members were varied in response to WYMV infection. Thus, our results provide insights into the interaction between TaHSP23.6 and WYMV infection.
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