Zinc finger transcription factor ZAT6 modulates pyroxsulam resistance by activating cytochrome CYP92C6 expression in Italian ryegrass (Lolium perenne ssp. multiflorum).

ZAT6 transcription factor directly activates CYP92C6 expression, conferring pyroxsulam resistance in Italian ryegrass (Lolium perenne ssp. multiflorum).

• Why it matters: Understanding the regulatory mechanisms behind P450 overexpression in resistant weeds is crucial for developing sustainable weed management strategies, as herbicide resistance threatens crop productivity.
• What they did: Researchers identified CYP92C6 as a key gene in pyroxsulam resistance and demonstrated that ZAT6 binds to its promoter, with overexpression of ZAT6 or CYP92C6 in model plants increasing herbicide tolerance.
• The result: The study reveals that ZAT6-mediated activation of CYP92C6 enhances pyroxsulam detoxification, providing insights into transcriptional regulation mechanisms that could inform resistance management approaches.