Mammalian growth factors enhance regeneration in transgenic tomato lines.
Garchery C, Benejam J, Grau A, Gricourt J, Pelpoir E
Crispr
Heirloom and heritage tomato varieties — the ones with the best flavor but the worst disease resistance — have long been nearly impossible to improve with modern gene-editing tools because they refuse to regrow from lab culture; this research cracks that door open.
To breed better tomatoes with gene-editing tools, scientists must first coax tiny pieces of plant tissue to grow into whole plants inside a lab — and many beloved tomato varieties stubbornly refuse to do this. Researchers tried adding proteins normally used by animal immune systems to the nutrient broth the plant tissue grows in, and it worked remarkably well: even the most difficult tomato types cooperated. After three years of experiments across six different tomato varieties, the team showed this approach consistently boosted both the number of edited plants produced and how genetically stable those plants turned out to be.
Key Findings
Mammalian growth factor supplementation significantly improved regeneration frequency across six tomato lines over three years, with the strongest gains in genotypes that previously resisted transformation
Two cytokines and one pro-inflammatory factor were selected based on their molecular similarity to plant kinase genes, suggesting a cross-kingdom signaling mechanism may underlie the effect
Growth factor treatment increased not only initial transformation success but also the yield of stable secondary transgenic lines, compounding the benefit for breeding programs
chevron_right Technical Summary
Scientists discovered that adding mammalian immune-signaling proteins to the lab process used to create genetically edited tomato plants dramatically improved success rates, especially in stubborn tomato varieties that previously resisted gene editing. This three-year study spanning six tomato lines suggests a broadly applicable trick for unlocking CRISPR-based improvements across diverse crop genotypes.
Abstract Preview
Genome editing technologies are now available for many crop species, greatly enhancing our ability to investigate gene function and transforming the field of plant transgenesis. However, the capaci...
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