Cyrtomium macrophyllum naturally grown in 225.73 mg kg⁻¹ of soil mercury in mining area was found to be a potential mercury accumulator plant with the translocation factor of 2.62 and the high mercury concentration of 36.44 mg kg⁻¹ accumulated in its aerial parts. Pot experiments indicated that Cyrtomium macrophyllum could even grow in 500 mg kg⁻¹ of soil mercury with observed inhibition on growth but no obvious toxic effects, and showed excellent mercury accumulation and translocation abilities with both translocation and bioconcentration factors greater than 1 when exposed to 200 mg kg⁻¹ and lower soil mercury, indicating that it could be considered as a great mercury accumulating species. Furthermore, the leaf tissue of Cyrtomium macrophyllum showed high resistance to mercury stress because of both the increased superoxide dismutase activity and the accumulation of glutathione and proline induced by mercury stress, which favorited mercury translocation from the roots to the aerial parts, revealing the possible reason for Cyrtomium macrophyllum to tolerate high concentration of soil mercury. In sum, due to its excellent mercury accumulation and translocation abilities as well as its high resistance to mercury stress, the use of Cyrtomium macrophyllum should be a promising approach to remediating mercury polluted soils.

中文翻译：

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汞蓄积植物小花菊（Cyrtomium macrophyllum）及其对汞污染地点的植物修复潜力

贯众大叶在225.73毫克千克自然生长^-1在矿区土壤汞的被发现是2.62易位因子和36.44的高的汞浓度的电位的汞累加器植物毫克千克^-1累积在其地上部分。盆栽试验表明，大叶菊可以在500 mg kg ^-1的土壤汞中生长，但对汞的生长具有抑制作用，但没有明显的毒性作用，当暴露于200毫克汞时，其汞的累积和转运能力极佳，转运和生物浓缩系数均大于1。毫克公斤^-1以及较低的土壤汞含量，表明它可以被认为是一种巨大的汞累积物种。此外，由于超氧化物歧化酶活性的增加以及汞胁迫引起的谷胱甘肽和脯氨酸的积累，Cyrtomium macrophyllum的叶片组织对汞胁迫表现出较高的抵抗力，这表明汞从根向地上部分易位，这揭示了可能的原因。对于贯众大叶容忍土壤汞的浓度高。总之，由于其出色的汞累积和迁移能力以及对汞胁迫的高抵抗力，使用Cyrtomium macrophyllum应该是修复汞污染土壤的有前途的方法。