Abstract
Solanum lycopersicum L. is the second most significant fruit crop after potato. It is a rich source of various vitamins, dietary components, and carotenoid content as well. Carotenoids are essential pigments in numerous physiological processes as well as accessory pigments in photosynthesis regulated by phytoene desaturase (PDS) gene. Although the role of PDS gene has been reported in various plants, its role in Pakistan’s local cultivar “Rio Grande” has not been investigated yet. Therefore, the current research aimed to evaluate PDS gene’s function via TRV-VIGS-based optimized transient silencing protocol. Briefly, PDS gene of tomato was studied computationally for its localization and potential functions. Afterward, the PDS gene was silenced in Rio Grande by agro-infiltration through TRV-VIGS. In order to ensure effective silencing, pigment analysis, PDS gene molecular analysis, and infiltration efficacy were all investigated. Computational studies revealed high conservation in the promoter of PDS gene among selected plant species with a prevalence of CAAT-box and TATA-box. The study highlighted chloroplast to be the principal cellular structure where the majority of PDS protein is found. A transcriptome study of the transiently silenced Rio Grande revealed a considerable reduction in PDS mRNA transcripts in leaves with reference to the respective control. Pigment analysis of the PDS-silenced albino plant leaves showed approximately 90% reduction in their chlorophyll a, chlorophyll b, and carotenoid content suggesting the successful silencing of PDS gene as its active expression plays a positive role in pigment synthesis. The obtained results highlight the role of PDS gene in Rio Grande as well as TRV-based VIGS to be a promising technique to improve crop attributes by efficiently silencing the target genes.
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The data used to support the findings of this study are available from the corresponding author upon request.
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Acknowledgements
The authors extend their appreciation to the Researchers Supporting Project number (RSP-2024R369), King Saud University, Riyadh, Saudi Arabia. The authors would like to thank the National Institute of genomics and advanced biotechnology (NIGAB), NARC, Islamabad, for providing the necessary facilities for this study and TAIR (The Arabidopsis Information Resource) database for providing TRV-VIGS vectors.
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Researchers Supporting Project number (RSP-2024R369), King Saud University.
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IM performed all the experiments, formal analysis of all data, and writing—review and editing of the manuscript. MM involved in formal analysis and writing—review and editing of the manuscript. AB designed the study, supervised, and finalized the drafting. YS, KAA, and AMA reviewed original draft. SI and ZH reviewed the manuscript. SA, SF, and FA involved in supervision and review of the manuscript. MMS supervised and finalized original draft.
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Mehboob, I., Mughees, M., Baig, A. et al. An efficient virus-induced gene silencing of PDS gene in Solanum lycopersicum (cv. Rio Grande) and its functional analysis. Braz. J. Bot 46, 881–892 (2023). https://doi.org/10.1007/s40415-023-00941-5
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DOI: https://doi.org/10.1007/s40415-023-00941-5