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首页> 外文期刊>Advancements in Life Sciences >Analysis of growth response and tolerance index of Glycine max (L.) Merr. under hexavalent chromium stress
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Analysis of growth response and tolerance index of Glycine max (L.) Merr. under hexavalent chromium stress

机译：Glycine max（L.）Merr。的生长反应和耐受指数分析。在六价铬胁迫下

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Background: Metal pollution has become one of the most serious environmental problemsdue to various human activities. It can damage or alter the biosphere reducing the agriculturalproductivity and can affect both animals and humans. Emission of various pollutants into theatmosphere has many harmful effects on plant growth. Rapid urbanization, unregulatedindustrialization, growing transport, metal plating and agricultural activities have created aproblem of heavy metals contamination.Methods: A greenhouse experiment was conducted to determine the toxicity of chromium onGlycine max. Chromium concentration applied to G. max was managed as 0.5, 2.5, 5, 10, 25,50 and 100 mg kg-1 for experimental period of 90 days. The phytotoxic effect of chromiummetal was analyzed by studying seed germination, seedling vigor index, root and shootlength, root and shoot fresh and dry weights, chlorophyll content and tolerance index.Results: The data presented in this study showed that chromium metal adversely affects thegrowth of G. max and significantly (p<0.05) reduces seed germination and growth. The toxiceffect of chromium on the seeds increased with increasing the concentration of the metal. Itwas also found that high concentrations of chromium (50 and 100 mg kg-1) can completelyinhibit the seed germination.Conclusion: The chromium metal is extremely toxic for seeds and young seedling of G. maxat high concentrations. Moreover, G. max has little potential to counteract the deleteriouseffect of chromium metal in soil at aforementioned treatments. The results of the presentstudy may help in better understanding of the mechanisms involved in pytoextraction.
机译：背景：由于各种人类活动，金属污染已成为最严重的环境问题之一。它可能破坏或改变生物圈，降低农业生产力，并可能影响动物和人类。各种污染物排放到大气中会对植物生长产生许多有害影响。快速的城市化，无节制的工业化，日益增长的交通运输，金属电镀和农业活动造成了重金属污染问题。方法：进行温室试验以确定铬对大豆最大的毒性。在90天的实验期内，应用于G.max的铬浓度分别控制为0.5、2.5、5、10、25.50和100 mg kg-1。通过研究种子的发芽，幼苗活力指数，根和茎长，根和茎的鲜重和干重，叶绿素含量和耐受性指数，分析了铬金属的植物毒性作用。 G. max和显着（p <0.05）减少种子发芽和生长。铬对种子的毒性作用随金属浓度的增加而增加。还发现高浓度的铬（50和100 mg kg-1）可以完全抑制种子发芽。结论：铬金属对高浓度的G. maxat的种子和幼苗具有极高的毒性。此外，在上述处理中，G。max几乎没有潜力抵消土壤中铬金属的有害作用。这项研究的结果可能有助于更好地了解与化脓有关的机制。

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