Harnessing Viral Power: A Revolutionary Advance in Plant Gene Editing

A groundbreaking method in plant genetics is set to open a new chapter in agricultural enhancement that would lead to disease-resistant crops, accompanied by improved nutrition. This advancement is anticipated following successful research conducted by Seoul National University scholars who implemented virus-induced genome editing (VIGE) techniques, revolutionizing crop-breeding practices.

This is viewed as a paradigm shift in agricultural biotechnology after the group of researchers tested the innovative approach on Solanaceous plants. The new strategy streamlines genetic alteration while accelerating the process — an advantage over conventional methods of crop genetic modification that are not only slower but also encounter regulatory obstacles, as well as financial and technical challenges.

Their research encompassed two VIGE methodologies — one using the tobacco rattle virus (TRV) vector delivering single guide RNAs (sgRNAs) into a transgenic tomato line expressing the Cas9 gene, and the second utilizing the potato virus X (PVX) vector to concurrently introduce Cas9 and sgRNAs. The scholars observed that these methods eliminated the necessity for traditional transgenic lines. Established genome editing methodologies depend on creating stable transgenic lines that express Cas9/sgRNA gene modules through extensive tissue culture, which is time-consuming and labor-intensive.

Both innovative approaches employed deep sequencing and thermal treatments that improved genome editing effectiveness, achieving mutation rates of 40.3% with TRV and 36.5% with PVX. This is deemed impressive for its simplicity and resource efficiency, in addition to their high effectiveness. The VIGE methods exhibited the potential for extensive application in other Solanaceous plants, highlighting their adaptability and influence on plant-breeding research.

The two methodologies, released in the journal Horticulture Research on November 17, 2024, utilized viral vectors to facilitate genome editing without laborious tissue culture phases, generating optimism for speeding up the creation of more sustainable, resilient crops that can provide more nutritious food sources.