Development of tomatoes with high sugar and GABA accumulation and parthenocarpic traits by introducing mutations in HWS and GAD3.
Choi S, Iwama T, Kobayashi M, Ezura H, Miura K
Crispr
Tomato plants that fruit without bees during summer heat waves could keep your garden productive through the increasingly brutal stretches that now kill flower set across most of the country.
Researchers tweaked two genes in tomatoes using a precise editing tool — one gene that controls how the plant fine-tunes its own activity, and one involved in making a beneficial compound called GABA. The edited plants grew sweeter fruit with more of that beneficial compound, and they could set fruit even without being pollinated by insects. This last trait is especially useful because high temperatures during flowering often prevent normal pollination and wipe out yields.
Key Findings
CRISPR mutations in two genes (HWS and GAD3) increased both sugar content (measured in Brix) and GABA levels in tomato fruit
Mutant plants showed facultative parthenocarpy — the ability to develop fruit without pollination — particularly under elevated temperature conditions
The parthenocarpic effect was linked to HWS's role in regulating gene expression during fruit development, causing broader changes in plant hormone activity
chevron_right Technical Summary
Scientists used CRISPR gene editing to create tomato plants that produce more sugar and higher levels of GABA (a calming amino acid) while also setting fruit without pollination — a useful trait when heat disrupts bee activity.
Abstract Preview
Tomatoes are vital crops globally and they provide numerous nutritional benefits, including vitamins, lycopene, and gamma-aminobutyric acid (GABA). This study utilized CRISPR/Cas9 technology to int...
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