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首页> 外文期刊>Plant and Soil >Toxic effects of Ni super(2+) on growth of cowpea (Vigna unguiculata)
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Toxic effects of Ni super(2+) on growth of cowpea (Vigna unguiculata)

机译：Ni super（2+）对of豆（Vigna unguiculata）生长的毒性作用

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Despite the importance of Ni-polluted soils throughout the world, comparatively little is known about the activity of Ni super(2+) required to reduce plant growth and the effects that Ni super(2+) toxicity has on the plant. Cowpea (Vigna unguiculata (L.) Walp. cv Caloona) was grown in dilute nutrient solutions to investigate the effect of Ni super(2+) activity on shoot and root growth. A Ni super(2+) activity of 1.4 mu M was found to cause a 10% reduction in the relative fresh mass of the root and shoots. The primary site of Ni super(2+) toxicity was the shoots, with the younger leaves displaying an interveinal chlorosis (possibly a Ni-induced Fe deficiency) at Ni super(2+) activities greater than or equal to 1.7 mu M. Lateral root formation was inhibited in the two highest Ni super(2+) treatments (3.3 and 5.1 mu M), and the roots growing at the highest Ni super(2+) activity were short and stubby and brown in color. However, no other symptoms of toxicity were observed on the roots at lower Ni super(2+) activities.
机译：尽管在世界范围内镍污染的土壤非常重要，但对减少植物生长所需的Ni super（2+）活性以及Ni super（2+）毒性对植物的影响知之甚少。 pea豆（Vigna unguiculata（L.）Walp。cv Caloona）在稀营养液中生长，以研究Ni super（2+）活性对苗和根生长的影响。发现Ni的super（2+）活性为1.4μM，导致根和茎的相对新鲜量减少10％。 Ni super（2+）毒性的主要部位是芽，年轻的叶片在Ni super（2+）活性大于或等于1.7μM时表现出小叶绿化（可能是Ni诱导的铁缺乏）。在两个最高的Ni super（2+）处理（3.3和5.1μM）中，根形成受到抑制，并且在最高的Ni super（2+）活性下生长的根短而短而棕褐色。但是，在较低的Ni super（2+）活性的根部上未观察到其他毒性症状。

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