ArticleBMC plant biology2026
Differential response to waterlogging stress in rapeseed (Brassica napus L.): insights from physiological, transcriptomic, and metabolomic analyses.
Article in BMC plant biology, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
Waterlogging stress severely impacts the yield and quality of rapeseed (Brassica napus L.), necessitating the elucidation of tolerance mechanisms through a comparative analysis of contrasting varieties. To elucidate the mechanisms of tolerance, this study employed an integrative approach combining physiological, transcriptomic, and metabolomic analyses to compare the waterlogging-tolerant genotype D199 with the sensitive genotype N1983. Physiological profiling indicated that D199 exhibited 24% higher superoxide dismutase (SOD) activity and 94% higher catalase (CAT) activity, alongside a 7% reduction in superoxide anion accumulation compared to N1983 under stress conditions, effectively mitigating reactive oxygen species (ROS) damage. Integrated transcriptomic and metabolomic profiling has revealed three synergistic adaptation mechanisms: the upregulation of AHP4 (3.0-fold), associated with cytokinin signaling pathways, enhances the leaf’s antioxidant capacity via the activation of RR1/RR2. Additionally, auxin biosynthesis genes IAA14 (2.9-fold) and GH3.6 (2.2-fold) facilitate root remodeling through the induction of SAUR4/5/78 (3.6-4.0-fold). Crucially, the spatiotemporal coordination between auxin and cytokinin pathways orchestrates aerial ROS scavenging and root plasticity, involving co-expressed genes SAUR (auxin-responsive) and AHP4 (cytokinin-related). This systematic decoding of the hormone crosstalk network identifies actionable breeding targets (IAA14, AHP4, SAUR78) for the development of waterlogging-resilient cultivars.
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