ArticleFrontiers in plant science2026
Assessment of high-light adaptation and screening of superior oat germplasm.
Article in Frontiers in plant science, 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
Background: In the context of climate warming, high-light stress has become a major environmental constraint on crop photosynthetic efficiency and growth. Elucidating the physiological and morphological responses of oat seedlings to high light, together with the identification of tolerant germplasm, is therefore essential for enhancing oat adaptation to light-intensive environments. Methods: Forty-eight oat ( Results: High-light stress markedly suppressed seedling growth, with most growth-related traits exhibiting an overall decline. Based on the comprehensive evaluation index derived from the TOPSIS model in combination with cluster analysis, the 48 oat accessions were classified into four distinct high-light tolerance groups. Among these, Qingyongjiu 478 and Xizangbailang demonstrated superior adaptation to high-light conditions. Structural equation modeling further indicated that proline content, SPAD value, and stem diameter had significant effects on aboveground fresh weight formation, with total effects of -0.506, 0.475, and 0.470, respectively. Conclusion: This study establishes a robust framework for evaluating high-light adaptability at the oat seedling stage, identifies key physiological traits governing biomass accumulation under high-light stress, and provides valuable germplasm resources and theoretical support for high-light tolerance gene discovery and oat breeding programs.
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