ArticleInternational journal of molecular sciences2026
A Shade Intensity Threshold Triggers Gibberellin Metabolic Reprogramming to Drive Shade Avoidance in Soybean.
Article in International journal of molecular sciences, 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
Shade stress severely constrains soybean yield in soybean-maize intercropping systems, yet the intensity threshold triggering shade avoidance responses and the underlying hormonal mechanisms remain elusive. Here, through two-year field experiments, we demonstrate that shading coverage rate exceeding 80% is the critical threshold initiating shade avoidance, increasing plant height by 16-61%. The seventh internode is the initial responsive site where epidermal cells elongate by 69.86% longitudinally, while radial growth is broadly suppressed (cell area reduced by approximately 41%). Furthermore, integrated hormonal profiling and gene expression analyses demonstrate that shade promotes active gibberellin (GA) accumulation via dual metabolic reprogramming: upregulating biosynthetic genes
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