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首页> 外文期刊>Acta Physiologiae Plantarum >Interactive influence of arsenate and selenate on growth and nitrogen metabolism in wheat (Triticum aestivum L.) seedlings
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Interactive influence of arsenate and selenate on growth and nitrogen metabolism in wheat (Triticum aestivum L.) seedlings

机译：砷和硒酸盐对小麦幼苗生长和氮代谢的交互影响

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摘要

The effect of arsenate and selenate, either alone or in combination, on plant growth and nitrogen metabolism was studied in wheat seedlings. The root-shoot elongation and the biomass production were significantly decreased with increasing arsenate concentrations. Arsenate toxicity severely affected activities of different antioxidant scavenging enzymes and oxidative stress markers in the test seedlings. The activities of nitrate and nitrite reductase were also affected resulting in reduced nitrate and nitrite contents. Glutamine synthetase and glutamate synthase activities were also reduced, whereas the glutamate dehydrogenase activity was substantially increased resulting in an increased accumulation of ammonium contents in the test seedlings. Arsenate treatments also adversely affected the levels of total and soluble nitrogen contents and free amino acid contents. Combined application of arsenate with selenate in the test seedlings showed significant alterations in all parameters tested under thepurview of arsenate treatment alone leading to better growth and nitrogen metabolism.
机译：在小麦幼苗中研究了砷酸盐和硒酸盐单独或组合对植物生长和氮代谢的影响。随着砷酸盐浓度的增加，根冠伸长率和生物量产生显着降低。砷酸盐的毒性严重影响了试验幼苗中不同抗氧化剂清除酶和氧化应激标志物的活性。硝酸盐和亚硝酸盐还原酶的活性也受到影响，导致硝酸盐和亚硝酸盐含量降低。谷氨酰胺合成酶和谷氨酸合酶的活性也降低了，而谷氨酸脱氢酶的活性却大大提高了，导致试验苗中铵含量的积累增加。砷酸盐处理也不利地影响了总氮和可溶性氮含量以及游离氨基酸含量。砷酸盐和硒酸盐在试验幼苗中的联合施用显示，在单独使用砷酸盐处理的范围内，所测试的所有参数均发生了显着变化，从而导致了更好的生长和氮代谢。

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