One tea oil tree gene quadruples drought survival in test plants
Crop Improvement
The next time you're babying a stressed plant through a dry spell, know that scientists are pinpointing the exact genetic switches that let some plants shrug off drought while others wilt.
Researchers took a gene called CoRVE1 from Camellia oleifera, a woody tree grown in China for its seed oil, and inserted it into a lab plant to see what it would do under drought stress. Plants carrying the gene survived at rates over four times higher than normal plants, lost water more slowly through their leaves, and had built-in chemical defenses that reduced cell damage. The gene works by cranking up the plant's natural stress-fighting systems, like antioxidants and water-retention compounds, offering a promising target for breeding tougher drought-resistant crops.
Key Findings
Overexpressing CoRVE1 raised drought survival rates in transgenic plants to 84% and 86%, versus 20% in normal plants
Detached leaves from transgenic plants lost water more slowly, reaching only 7.2-7.6% loss after 200 minutes compared to 9% in normal plants
SOD antioxidant enzyme activity rose 84.6-85.7% in transgenic plants under 10 days of drought, versus 37.6% in normal plants, alongside a 17-18% drop in cell-damage marker malondialdehyde
chevron_right Technical Summary
Scientists found a gene from tea oil camellia that, when added to lab plants, dramatically boosts drought survival, from 20% to over 84%. This could help breeders develop hardier woody oil crops and other plants as droughts become more common.
Abstract Preview
Original paper
Overexpression of Camellia oleifera CoRVE1 enhances drought tolerance in transgenic Arabidopsis thaliana
Camellia oleifera is an important woody oil crop in China, whose growth and productivity are frequently limited by drought stress. Although transcription factors play crucial roles in plant stress ...
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Camellia oleifera, which originated in China, is notable as an important source of edible oil obtained from its seeds. It is commonly known as the oil-seed camellia or tea oil camellia, though to a lesser extent other species of camellia are used in oil production too.