ArticleBMC plant biology2026
Mechanisms underlying the accumulation and detoxification of manganese in Celosia argentea Linn. leaves.
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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The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
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Abstract
backgroundAs an essential trace element for plants, manganese (Mn) poses significant threats to ecosystems and human health when it accumulates excessively in soils and aquatic environments. Celosia argentea Linn. is a promising Mn hyperaccumulator. However, the regulatory mechanisms underlying leaf responses to Mn stress remain poorly understood, particularly regarding the interplay between stomatal dynamics and detoxification strategies. This study investigated the physiological and biochemical adaptive mechanisms of C. argentea leaves under Mn toxicity, with a focus on elucidating the roles of antioxidant defence systems, stomatal behaviour modulation, and Mn chemical transformation in detoxification processes.
resultsThe experimental findings demonstrate three outcomes. (1) The antioxidant system mitigates Mn-induced oxidative damage through synergistic interactions between enzymatic and nonenzymatic components, although the defensive capacity becomes limited under extreme Mn concentrations. (2) The presence of Mn stress significantly reduces gas exchange parameters, specifically the transpiration rate (Tr) and stomatal conductance (Gs), in leaves, with more pronounced decreases observed in leaf tip parts, revealing the adaptive mechanisms in leaves under such stress conditions. (3) The chemical forms of Mn undergo dynamic transformations along concentration gradients, shifting from water-soluble fractions to protein-bound forms, which indicates the existence of an adaptive detoxification strategy.
conclusionsThese findings provide theoretical insights and scientific evidence for understanding the heavy metal tolerance strategies of hyperaccumulators and advancing the application of phytoremediation technologies.
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