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首页> 外文期刊>Plant and Soil >Alleviation of nickel toxicity by ammonium supply to sunflower plants.
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Alleviation of nickel toxicity by ammonium supply to sunflower plants.

机译：通过向向日葵植物供应铵盐减轻镍的毒性。

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A hydroponic experiment was conducted to study the effect of Ni toxicity on the growth, nutrient status of the different plant parts and leaf chlorophyll concentrations in sunflower cv. Quipu grown with different forms of N supply. The plants were grown under controlled conditions for 35 days. Depending on the N source supplied, there were significant differences in the sensitivity of sunflower plants to excess Ni. Tolerance was lowest when grown with NO3- alone. A high Ni and NO3- as the only N source resulted in reduced dry weight and significant decreases in nutrient concentration. Plants supplied with a mixture of NO3- and NH4+ absorbed in the presence of Ni in solution approx. three times less Ni than those supplied with NO3- alone. Consequently, there were great differences in Ni concentrations between treatments. With a N nutrition of 100% NO3--N, Ni supply led to severe growth inhibition. Just contrary, simultaneous supply of NO3- and NH4+ not only reduced Ni toxicity, but growth was evenstimulated by Ni if supplied to plants fed with NO3- and NH4+. This indicates the significant role of the N form supplied in the behaviour of Ni toxicity in sunflowers.
机译：进行了水培试验，研究了镍的毒性对向日葵CV生长，不同植物部位的营养状况以及叶片叶绿素浓度的影响。 Quipu生长着不同形式的氮供应。使植物在受控条件下生长35天。取决于所供应的氮源，向日葵植物对过量镍的敏感性存在显着差异。当单独使用NO3时，耐受性最低。高Ni和NO3-作为唯一的N源导致减少的干重和显着降低的养分浓度。供应有NO3-和NH4 +混合物的设备在Ni的存在下被溶液吸收。镍的含量比单独使用NO3的镍少三倍。因此，各处理之间的镍浓度差异很大。氮营养为100％NO3--N时，镍供应会严重抑制生长。恰恰相反，同时供给NO3-和NH4 +不仅降低了Ni的毒性，而且如果将其供给以NO3-和NH4 +喂养的植物，Ni还能促进生长。这表明所供应的N形式在向日葵的Ni毒性行为中具有重要作用。

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