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首页> 外文期刊>Plant and Soil >Toxic effects of Ni2+ on growth of cowpea (Vigna unguiculata).
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Toxic effects of Ni2+ on growth of cowpea (Vigna unguiculata).

机译：Ni2 +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 Ni2+ required to reduce plant growth and the effects that Ni2+ toxicity has on the plant. Cowpea (Vigna unguiculata (L.) Walp. cv Caloona) was grown in dilute nutrient solutions to investigate the effect of Ni2+ activity on shoot and root growth. A Ni2+ activity of 1.4 micro M was found to cause a 10% reduction in the relative fresh mass of the root and shoots. The primary site of Ni2+ toxicity was the shoots, with the younger leaves displaying an interveinal chlorosis (possibly a Ni-induced Fe deficiency) at Ni2+ activities >=1.7 micro M. Lateral root formation was inhibited in the two highest Ni2+ treatments (3.3 and 5.1 micro M), and the roots growing at the highest Ni2+ activity were short and stubby and brown in color. However, no other symptoms of toxicity were observed on the roots at lower Ni2+ activities..
机译：尽管在世界范围内镍污染的土壤非常重要，但对于减少植物生长所需的Ni2 +活性以及Ni2 +毒性对植物的影响知之甚少。 pea豆（Vigna unguiculata（L.）Walp。cv Caloona）在稀释的营养液中生长，以研究Ni2 +活性对苗和根生长的影响。发现1.4 micro M的Ni2 +活性会导致根和枝条的相对新鲜质量降低10％。 Ni2 +毒性的主要部位是芽，年轻的叶片在Ni2 +活性> = 1.7 micro M时表现出小叶绿化（可能是Ni诱导的铁缺乏）。在两个最高的Ni2 +处理（3.3和3.3）中，侧根的形成受到抑制。 5.1 micro M），并且以最高Ni2 +活性生长的根短而粗短且呈褐色。但是，在较低的Ni2 +活性下，在根部未观察到其他毒性症状。

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