One gene edit makes tomatoes tougher against virus and drought
Park M, Oh M, Kweon Y, Moon H, Bae Y
Crispr
If you've ever watched a tomato plant wilt in a summer dry spell or curl up with mosaic virus, this points to a single genetic switch that could fix both problems in future backyard varieties.
Researchers found a gene in tomato plants, called SlCNGC18, that normally holds back the plant's defenses. When they used gene editing to disable it, the tomatoes fought off Cucumber mosaic virus far better and survived drought conditions at much higher rates than normal plants. The edited plants achieved this by boosting their natural defense hormone and adjusting their leaf pores to lose less water.
Key Findings
Mutant plants showed more than threefold reduction in viral accumulation and milder disease symptoms after CMV infection
Under drought, mutant plants had roughly sevenfold higher survival rates and reduced water loss compared to normal plants
Mutants showed doubled salicylic acid levels, sevenfold upregulation of defense gene SlPR1, and smaller but denser stomata with enhanced ABA signaling
chevron_right Technical Summary
Scientists edited a single gene in tomato plants and got two big wins at once: much stronger resistance to a common virus and dramatically better survival during drought.
Abstract Preview
Original paper
Disruption of SlCNGC18 enhances Cucumber mosaic virus resistance and drought tolerance in tomato (Solanum lycopersicum L. cv. Micro-Tom).
Tomato is a globally important crop that is frequently affected by stress linked to viral infection and drought, both of which significantly reduce yield and quality. Cucumber mosaic virus (CMV) is...
open_in_new Read full abstractAbstract copyright held by the original publisher.
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