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首页> 外文期刊>The New Phytologist >Do high-nickel leaves shed by the nickel hyperaccumulator Alyssum murale inhibit seed germination of competing plants?
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Do high-nickel leaves shed by the nickel hyperaccumulator Alyssum murale inhibit seed germination of competing plants?

机译：镍超积雪草产生的高镍叶会抑制竞争植物的种子发芽吗？

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摘要

Elemental allelopathy suggests that nickel (Ni)-rich leaves shed by hyperaccumulators inhibit the germination and growth of nearby plant species. Here, the germination of eight herbaceous species following addition of Alyssum murale biomass or Ni(NO3)2, with the same Ni level added to soil, was assessed. The distribution of Ni in soil was tested by determining Ni phytoavailability and speciation over time. Phytoavailable Ni in soil amended with biomass declined rapidly over time due to Ni binding to iron (Fe)/manganese (Mn) oxides in the soil. No significant effects on seed germination were observed. Unlike the Ni complex in Alyssum biomass, more Ni remained soluble and phytoavailable in soil amended with Ni(NO3)2, thus significantly inhibiting seed germination. High-Ni leaves shed by hyperaccumulators did not appear to create a 'toxic zone' around the plants and inhibit germination or growth of competing plants. The lack of an allelopathic effect was probably related to low Ni availability.
机译：元素化感作用表明，高蓄积物脱落的富含镍（Ni）的叶子抑制了附近植物物种的发芽和生长。在这里，评估了八叶草生物质或Ni（NO3）2的添加后，八个草种的发芽情况，其中相同的Ni添加到土壤中。通过确定Ni的植物有效性和形态随时间变化来测试Ni在土壤中的分布。由于镍与土壤中的铁（Fe）/锰（Mn）氧化物结合，因此经过生物量改良的土壤中可利用的植物镍迅速下降。没有观察到对种子发芽的显着影响。与香雪球生物量中的镍络合物不同，更多的镍在溶解有Ni（NO3）2的土壤中保持可溶和可利用的植物，从而显着抑制了种子发芽。过度积累的高Ni叶片似乎并未在植物周围形成“毒性区”并抑制竞争植物的发芽或生长。缺乏化感作用可能与低镍可用性有关。

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