S-nitrosoglutathione reductase deficiency is associated with altered recovery from repeated climate stress across generations in Arabidopsis thaliana.

In Arabidopsis thaliana, gsnor1-3 (GSNOR-deficient) plants show reduced vegetative growth and reproductive output versus WT across control and repeated climate-stress scenarios through G1–G5.

• Why it matters: Climate stress can recur and interact, but how plant responses persist across generations and which mechanisms shape recovery remains unclear.
• What they did: WT (Col-0) and gsnor-ko were propagated for three generations under control, drought, elevated CO2, O3, heat, and combined treatments, then recovered for two generations; rosette growth, photosynthesis, seed output, and RNA-seq transcriptomes were measured.
• The result: gsnor-ko had greater transcriptome similarity across generations and among genes responsive to the same treatment, with scenario- and generation-dependent shifts largest under heat and combined treatments, linked to DNA methylation, heterochromatin maintenance, histone ubiquitination, m6A regulation, and methyl-donor metabolism.

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