Hickory gene boosts nut oil and toxic soil tolerance together
Zheng S, Chen W, Zhang J, Wang F, Zhao J
Crop Improvement
If you've ever wondered why some trees thrive in stubbornly acidic, aluminum-rich soil while others struggle, this gene shows how a single switch can turn stress into stronger roots and richer nuts.
Researchers studying hickory trees found a gene called CcDGAT1 that does double duty: it helps the tree make more oil in its nuts, and it protects roots from damage caused by aluminum, a common toxic element in acidic soils. When the team boosted this gene's activity, trees grew healthier roots, kept their cell membranes intact under aluminum stress, and produced nuts with more heart-healthy unsaturated fats. They also found two helper genes that switch CcDGAT1 on, giving breeders a genetic roadmap for growing hardier, oil-rich trees on difficult soils.
Key Findings
Overexpressing CcDGAT1 increased total oil content and unsaturated fatty acid levels while improving root growth and biomass under aluminum stress
The gene redirects 18:2/18:3 fatty acids from vulnerable membrane lipids into protective storage oils (TAGs), reducing lipid peroxidation and electrolyte leakage
Two transcription factors, CcATML1 and CcWRKY11a, were shown via dual-luciferase, yeast one-hybrid, and EMSA assays to directly activate CcDGAT1 and enhance aluminum tolerance
chevron_right Technical Summary
Scientists found a gene in hickory trees that lets them pack more healthy oil into their nuts while also helping the trees survive toxic aluminum in acidic soil, a discovery that could help breed tougher, more productive nut and oil crops.
Abstract Preview
Original paper
A hickory diacylglycerol acyltransferase gene coordinates fatty acid metabolism and aluminum tolerance in plants.
Triacylglycerol (TAG) accumulation and abiotic stress tolerance are critical for woody oil crop productivity, yet their coordination remains poorly understood. Here, we characterized CcDGAT1, a dia...
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Hickory is a common name for trees composing the genus Carya, which includes 19 species accepted by Plants of the World Online.