Rice fights salty soil by trimming the tails of its gene messages
Shi C, Zou W, Cui Y, Wang Z, Yang L
Crop Improvement
Salt creeping into irrigated fields and coastal gardens is a growing problem, and the same tail-trimming trick that helps rice cope could guide breeding of tougher crops for salty ground.
When rice plants get stressed by salt, they cut short the trailing end of many of their gene messages. That shortcut lets stress-fighting genes escape a set of tiny molecular brakes, so the plant can respond faster. Scientists checked over 200 rice varieties, found the DNA spots that control this trimming, and showed that two genes linked to it really do change how well rice handles salt.
Key Findings
Profiling of over 200 rice accessions found 19,938 APA events under normal conditions and 22,251 under salt stress.
Salt stress globally shortened 3'UTRs by favoring proximal polyA sites, which can release miRNA-mediated repression of stress-response genes.
Mapped 1,634 (normal) and 1,809 (salt) cis-3'aQTLs, enriched in 3'UTRs and termination sites; CRISPR knockout and 3'UTR deletion of OsMyb21 and OsRNS3 confirmed roles in salt tolerance.
chevron_right Technical Summary
Researchers mapped how rice plants trim the ends of their gene messages when salt stress hits, across more than 200 rice varieties. Two genes controlled this way boost salt tolerance, giving breeders new targets for growing rice in salty soils.
Abstract Preview
Original paper
Pan-genomic analysis of alternative polyadenylation reveals a 3'UTR remodeling regulatory layer controlling salt tolerance in rice.
Alternative polyadenylation (APA) generates mRNA isoforms with variable 3'UTR lengths, yet its genetic basis and functional significance at the population level remain unexplored in plants. Here, w...
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