A slow-then-rapid spike development trajectory enables wheat to escape late-spring cold spells via transcriptional and epigenetic reprogramming.

A slow-then-rapid developmental trajectory in wheat enables escape from late-spring cold spells through combined transcriptional and epigenetic reprogramming, enhancing resilience.

• Why it matters: Late-spring cold spells threaten wheat production when sensitive spike development coincides with chilling periods, highlighting the need for cultivars with adaptive developmental timing to improve climate resilience.
• What they did: Researchers monitored phenotypic development and performed time-course RNA-seq and whole-genome bisulfite sequencing at key stages (T2 and T5) in the tolerant cultivar XN511, identifying gene expression and methylation changes linked to developmental shifts.
• The result: Findings reveal stage-specific epigenetic reprogramming and delayed activation of key pathways, providing targets for breeding wheat varieties with improved ability to avoid damaging cold spells.