Abstract
Main conclusion
Exogenous application of dsRNA molecules targeting MYMV genes offers a promising approach to effectively mitigate yellow mosaic disease in blackgram, demonstrating potential for sustainable plant viral disease management.
Abstract
The exogenous application of double-stranded RNA (dsRNA) molecules to control plant viral diseases is gaining traction due to its advantages over conventional methods, such as target specificity, non-polluting nature, and absence of residue formation. Furthermore, this approach does not involve genome modification. In this study, dsRNA molecules targeting the coat protein gene (dsCP) and replication initiator protein gene (dsRep) of mungbean yellow mosaic virus (MYMV) were synthesised using an in vitro transcription method. To evaluate the effectiveness of dsRNA treatment, blackgram plants exhibiting MYMV symptoms at the first trifoliate stage were subjected to exogenous application of dsRNA. Second, third, and fourth trifoliate leaves, which emerged at 7, 15, and 21 days after dsRNA application, respectively, were monitored for MYMV symptoms. Remarkably, a significant reduction in yellow mosaic disease (YMD) symptoms was observed in the newly emerged trifoliate leaves of MYMV-infected blackgram plants after treatment with dsRNA targeting both gene regions. This reduction was evident as a decrease in the intensity of yellow mosaic coverage on the leaf lamina compared to control. dsCP effectively reduced the MYMV titre in the treated plants for up to 15 days. However, dsRep demonstrated greater efficiency in conferring resistance to MYMV at 15 days post-application. These findings were supported by quantitative real-time PCR analysis, where the observed Ct values for DNA extracted from dsRep-treated plants were significantly higher compared to the Ct values of DNA from dsCP-treated plants at 15 days post-application. Similarly, higher viral copy numbers were observed in dsCP-treated plants 15 days after dsRNA treatment, in contrast to plants treated with dsRep.
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The data supporting the results reported in the paper are included within the manuscript provided.
Change history
25 October 2023
A Correction to this paper has been published: https://doi.org/10.1007/s00425-023-04264-3
Abbreviations
- DPA:
-
Days post application
- dsCP:
-
dsRNA molecule targeting the coat protein gene
- dsREP:
-
dsRNA molecule targeting the replication initiator protein gene
- dsRNA:
-
Double-stranded RNA
- YMD:
-
Yellow mosaic disease
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Kamesh Krishnamoorthy, K., Malathi, V.G., Renukadevi, P. et al. Exogenous delivery of dsRNA for management of mungbean yellow mosaic virus on blackgram. Planta 258, 94 (2023). https://doi.org/10.1007/s00425-023-04253-6
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DOI: https://doi.org/10.1007/s00425-023-04253-6