ArticleFrontiers in plant science2026
Mechanisms of acclimation regulation and stress response to UV-B in
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
Introduction: Ultraviolet-B radiation can enhance the accumulation of major chemical classes in medicinal plants but may simultaneously induce oxidative stress and cellular damage. Balancing these opposing effects is therefore critical for the effective application of UV-B in cultivation practices. Methods: In this study, Results: Plants exhibited strong acclimation to 20 μW cm-2 UV-B, with contents of polyphenols, flavonoids, alkaloids, and polysaccharides increasing by 41.0%, 16.3%, 33.1%, and 19.3%, respectively (P < 0.05), while maintaining relatively low stress levels. Transcriptomic analysis revealed that at 20 μW cm⁻², transcription factors including Discussion: These findings demonstrate that low-intensity UV-B (20 μW cm-2) promotes major chemical classes accumulation through photomorphogenic acclimation without significant stress damage, whereas high-intensity UV-B (80 μW cm-2) induces non-specific stress responses. This study provides a mechanistic framework for strategic UV-B application to improve medicinal plant quality and suggests optimized cultivation protocols for high-quality
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