Loss of DET1 in High Pigment 2 Tomato Prevents High Temperature Repression of Anthocyanin Biosynthesis in Fruit Through HY5 Stabilization.
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Loss of DET1 in high pigment 2 tomato prevents high temperature repression of anthocyanin biosynthesis by stabilizing HY5, enabling sustained pigment production under heat stress.
- Why it matters: Understanding how high temperatures suppress anthocyanin accumulation is vital for maintaining crop quality amid global warming, especially for health-beneficial compounds like anthocyanins.
- What they did: The study examined the role of COP1-DET1-HY5 signaling in tomato, focusing on the hp2 mutation that disrupts DET1, and analyzed gene expression and protein interactions under varying temperatures.
- The result: Disabling DET1 impairs COP1-mediated HY5 degradation, allowing continuous anthocyanin synthesis at high temperatures, and suggests that hp2 mutation can help develop heat-resilient, anthocyanin-rich tomato varieties.