Odontarrhena muralis (Brassicaceae) is a nickel hyperaccumulator species from the Balkans used as a “metal crop” in nickel phytomining. This study aimed to determine the elemental distribution, focusing on nickel, in fresh‐hydrated plant tissue (stems, leaves and inflorescences), to clarify where nickel is localized at the tissue and cellular scale‐level and to infer the physiological response to its hypertolerance and hyperaccumulation. For the analysis, intact plant organs of O. muralis were subjected to elemental imaging using synchrotron‐based micro‐X‐ray fluorescence (μXRF). The predominant distribution of nickel occurs in the epidermal tissue and at the base of the trichomes, which are also the main sinks for calcium deposition. The obtained results represent a further contribution to the knowledge of the physiological characteristics of this hyperaccumulating “metal crop” species and, consequently, to its application in sustainable metal extraction using phytomining.

中文翻译：

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同步加速器 µXRF 成像揭示了塞尔维亚镍超富集植物 Odontarrena muralis（十字花科）中的元素分布

壁齿藻（十字花科）是来自巴尔干半岛的镍超积累物种，在镍植物开采中用作“金属作物”。本研究旨在确定新鲜水合植物组织（茎、叶和花序）中镍的元素分布，以阐明镍在组织和细胞尺度水平上的定位，并推断对其超耐受性的生理反应和超积累。为了分析，完整的植物器官O. muralis使用基于同步加速器的微X射线荧光（μXRF）进行元素成像。镍的主要分布发生在表皮组织和毛状体的基部，它们也是钙沉积的主要汇。所获得的结果进一步有助于了解这种超积累的“金属作物”物种的生理特征，从而有助于其在植物采矿可持续金属提取中的应用。