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<p>Ultraviolet (UV) radiation is a significant environmental stressor that affects the growth, physiology, and biochemical integrity of various organisms. This study investigates the potential protective effects of a zinc-cysteine (Zn–Cys) complex against UV-C radiation, with a focus on its impact on selected microalgae (<i>Coccomyxa peltigera</i>e and <i>Parachlorella kessleri</i>) and maize (<i>Zea mays L.</i>). We demonstrate that exposure of the Zn–Cys complex to UV-C (254&#xa0;nm) results in the formation of fluorescent photoproducts, which exhibit UV-protective properties. The study reveals that Zn–Cys significantly mitigates UV-induced stress. In both microalgae species, the Zn–Cys complex enhanced growth even under UV exposure, with the 20% concentration showing the most robust protective effects. Further hyperspectral imaging confirmed the protective mechanism of Zn-Cys by monitoring changes in light reflectance in <i>Parachlorella kessleri</i>, indicating reduced photosynthetic efficiency and structural alterations induced by UV exposure, while Zn–Cys significantly mitigated these effects. In addition, in maize plants (<i>Zea mays L.</i>), Zn–Cys treatment preserved chlorophyll content and reduced polyphenol accumulation, indicating reduced oxidative stress. These findings highlight the potential of the Zn–Cys complex as a sustainable and cost-effective strategy for UV protection in both terrestrial and extraterrestrial agriculture, advancing our understanding of plant adaptation to extreme environments.</p>

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Enhanced UV-C resistance through light-activated zinc-cysteine complex formation

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2025年5月25日

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  • Martin Fuleky,
  • Katarina Molnarova,
  • Jan Novak,
  • Milada Vodova,
  • Libor Lenza,
  • Lukas Nejdl

摘要

Ultraviolet (UV) radiation is a significant environmental stressor that affects the growth, physiology, and biochemical integrity of various organisms. This study investigates the potential protective effects of a zinc-cysteine (Zn–Cys) complex against UV-C radiation, with a focus on its impact on selected microalgae (Coccomyxa peltigerae and Parachlorella kessleri) and maize (Zea mays L.). We demonstrate that exposure of the Zn–Cys complex to UV-C (254 nm) results in the formation of fluorescent photoproducts, which exhibit UV-protective properties. The study reveals that Zn–Cys significantly mitigates UV-induced stress. In both microalgae species, the Zn–Cys complex enhanced growth even under UV exposure, with the 20% concentration showing the most robust protective effects. Further hyperspectral imaging confirmed the protective mechanism of Zn-Cys by monitoring changes in light reflectance in Parachlorella kessleri, indicating reduced photosynthetic efficiency and structural alterations induced by UV exposure, while Zn–Cys significantly mitigated these effects. In addition, in maize plants (Zea mays L.), Zn–Cys treatment preserved chlorophyll content and reduced polyphenol accumulation, indicating reduced oxidative stress. These findings highlight the potential of the Zn–Cys complex as a sustainable and cost-effective strategy for UV protection in both terrestrial and extraterrestrial agriculture, advancing our understanding of plant adaptation to extreme environments.