A gene unique to rice makes crops drought-tough across species
Tu H, Liu Q, Ye T, Ye Y, Feng X
Crop Improvement
If you've ever watched tomatoes wilt in a summer dry spell, this points to a gene that could someday get bred or engineered into garden and farm crops far beyond rice to keep them producing when the rain stops.
Rice has a special gene, found in no other plant, that helps it handle drought stress by working with a protein its cells already use to sense dryness. When researchers moved this rice gene into totally unrelated plants like mustard-family Arabidopsis, canola, corn, wheat, and poplar trees, those plants also became better at surviving drought. In real farm field trials, rice plants with the naturally occurring, domesticated version of this gene produced up to 35% more grain under drought conditions than rice without it.
Key Findings
ROAD1 is an Oryza-specific orphan gene that confers drought tolerance without visible growth penalties under normal conditions
Field trials showed rice lines carrying the domesticated ROAD1C allele yielded up to 34.75% more grain than controls under drought
ROAD1 binds the phosphatase OsPP2C68 to activate drought signaling, and transferring ROAD1C into Arabidopsis, rapeseed, maize, wheat, and poplar improved drought tolerance in all of them
chevron_right Technical Summary
Scientists found a rice-only gene that hijacks the plant's stress-response system to survive drought without hurting growth, and shows the same trick works when transplanted into Arabidopsis, canola, corn, wheat, and poplar. Rice varieties carrying this gene yielded up to nearly 35% more grain during drought in real field trials.
Abstract Preview
Original paper
An Oryza orphan gene confers trans-species drought tolerance.
Drought threatens crop productivity, yet enhancing tolerance often compromises yield. Abscisic acid (ABA) signaling is central to drought response, but its deep conservation can constrain adaptive ...
open_in_new Read full abstractAbstract copyright held by the original publisher.
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